CN108621824A - A kind of equal balance system of Vehicular dynamic battery and its equalization methods - Google Patents
A kind of equal balance system of Vehicular dynamic battery and its equalization methods Download PDFInfo
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- CN108621824A CN108621824A CN201810240915.8A CN201810240915A CN108621824A CN 108621824 A CN108621824 A CN 108621824A CN 201810240915 A CN201810240915 A CN 201810240915A CN 108621824 A CN108621824 A CN 108621824A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Sustainable Energy (AREA)
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- Mechanical Engineering (AREA)
- Transportation (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of equal balance system of Vehicular dynamic battery and its equalization methods, which includes N number of concatenated single battery, further includes whole equalizing circuit and equalization data library module, the entirety equalizing circuit includes multiple monomer equalizing circuits；Monomer equalizing circuit there are one being all provided between two adjacent single batteries, the monomer equalizing circuit includes chopper circuit, voltage acquisition module, main control module, fuzzy controller and drive module；The equalization methods of the present invention, it is simple and efficient, logic is close, accuracy and degree of control are high, it solves electric automobile power battery packet in the prior art and the single battery energy inconsistence problems occurred in the process is used for a long time, make energy between adjacent cells from the single battery of high energy to the single battery transfer of deficient energy, integral battery energy is finally made to keep in balance.
Description
Technical field
The invention belongs to electric vehicle fields, are related to electric automobile power battery balancing technique, more specifically to one
The equal balance system of kind Vehicular dynamic battery and its equalization methods.
Background technology
Currently, in electric vehicle, in order to reach certain voltage, power and energy grade, it usually needs a large amount of power
Battery series-parallel connection composition battery pack is used.Each single power battery due to that cannot reach completely the same in manufacturing process,
Its battery performance has different degrees of difference in battery capacity, terminal voltage, internal resistance, self-discharge rate etc., these differences
Long-time with electric vehicle causes the electricity between each single battery of synchronization inconsistent using constantly increasing, excessive
Single battery difference can reduce the service efficiency of entire battery pack, the electricity estimation error for eventually leading to vehicle increases, continuation of the journey
Mileage declines.
In addition, due to limitations such as cost, battery pack arrangement spaces by battery management system, currently, common balanced electricity
Road is the passive equalizing circuit of energy-dissipating, can cause the loss of energy and generate waste heat, so as to cause to battery
Damage.
Invention content
In view of this, to solve above-mentioned the deficiencies in the prior art, the purpose of the present invention is to provide a kind of power train in vehicle application electricity
The equal balance system in pond and its equalization methods solve the monomer electricity that electric automobile power battery packet occurs in being used for a long time in the prior art
Pond energy inconsistence problems are arranged in pairs or groups corresponding equalization methods using equal balance system, are simple and efficient, logic is close, accuracy and control
System is high, makes energy between adjacent cells from the single battery of high energy to the single battery transfer of deficient energy, finally makes whole electricity
Pond energy is kept in balance.
To achieve the above object, the technical solution adopted in the present invention is：
A kind of equal balance system of Vehicular dynamic battery, including N number of concatenated single battery further include whole equalizing circuit and balanced number
According to library module, the entirety equalizing circuit includes multiple monomer equalizing circuits；
It is all provided between two adjacent single batteries there are one monomer equalizing circuit, the monomer equalizing circuit includes copped wave electricity
Road, voltage acquisition module, main control module, fuzzy controller and drive module, the chopper circuit is by 2 inductance L, 1 capacitance
C, 2 diode D, 2 MOSFET pipes composition, it is in parallel by capacitance C between 2 diode D, the single diode D with
Single MOSFET pipes are in parallel, and the MOSFET pipes are in parallel by inductance L respectively between single battery, and the single battery is just
Cathode is connect with the both ends of monomer equalizing circuit respectively, and the positive and negative anodes of the single battery are connect with voltage acquisition module respectively,
The voltage acquisition module, fuzzy controller are connect with the main control module respectively, and the fuzzy controller is connected with driving mould
Block, the both ends of the drive module are connect with 2 MOSFET pipes.
Further, the N is natural number, and N >=2.
Further, the monomer equalizing circuit, chopper circuit number be（N-1）It is a, N number of concatenated single battery
It is corresponding（N-1）To neighboring unit cell, 2（N-1）A inductance L,（N-1）A capacitance C, 2（N-1）A diode D, 2（N-1）It is a
MOSFET is managed.
Further, the equalization data library module is connect with main control module, and the equalization data library module includes whole
Balance policy unit, equilibrium, which are opened, closes criterion unit and euqalizing current size criterion unit；The equalization data library module is used
In storage parameter, two adjacent single batteries of the top-down detection of auxiliary main control module；The voltage acquisition module is used for
The terminal voltage of acquisition single battery in real time, and two neighboring single battery terminal voltage, pressure difference are sent to main control module；
The main control module for judge two neighboring single battery whether need to carry out it is balanced, and control fuzzy controller and
Drive module；
The fuzzy controller is used on the basis of monomer equalizing circuit, and the PWM wave to controlling MOSFET pipes carries out duty ratio
It adjusts, realizes the power transformation flow control to balance stage；
The drive module controls the switch of MOSFET pipes for exporting PWM wave, and driving monomer equalizing circuit works, and to owing
The single battery of energy charges.
Further, the MOSFET pipes are N-channel MOS FET pipes.
A kind of equalization methods of the equal balance system of Vehicular dynamic battery, include the following steps：
S1：Defined parameters：Equalization data library module sets threshold pressure differential as V0, single battery terminal voltage collection value be VBX, phase
The pressure difference collection value of adjacent two single batteries is, wherein the value of X be 1,2 ..., N；
S2：The equal balance system is balanced criterion with the terminal voltage of single battery, when time for balance is stationary vehicle, the equal balance system
Itself can work, and be not necessarily to external charging；
S3：When equilibrium starts, the voltage acquisition module of monomer equalizing circuit acquires two neighboring single battery in real time respectively
Terminal voltage, according to sequencing by the terminal voltage V of two neighboring single batteryBX、VB(X+1), pressure differenceIt is sent to master control mould
Block；
S4：Main control module calls equalization data library module, from the beginning two single batteries start, it is top-down judge it is two neighboring
The pressure difference of single batteryWhether the threshold pressure differential V of setting is more than0；
S41：If pressure difference is more than threshold pressure differential, i.e.,, then equilibrium is opened, main control module will
VBX、VB(X+1), pressure differenceIt is sent to fuzzy controller, fuzzy controller output duty cycle data to drive module, driving
Module exports PWM wave to chopper circuit and controls the switch of MOSFET pipes, to drive monomer equalizing circuit to work, to owing energy
Single battery charges；
S411：Based on S41, the pressure difference of the main control module real-time judge two neighboring single battery, if pressure difference is less than threshold pressure differential,
I.e., then stop equilibrium；
S42：Based on S41, otherwise, if pressure difference is 0, i.e.,, then the two neighboring single battery
Without equilibrium, it is balanced that main control module continuation judges downwards whether remaining two neighboring single battery needs to carry out；
S5：Main control module continues to judge the terminal voltage and pressure difference of remaining two neighboring single battery according to sequencing, and constantly
Step S4 is repeated, until all single battery terminal voltages reach almost the same.
Further, the collection value V of the terminal voltage of the single batteryBXRespectively VB1、VB2、...、VBN。
Further, in the step S41, fuzzy controller is counted according to fuzzy control rule table and membership function
It calculates, ambiguity solution obtains duty cycle data.
Further, in the step S41, drive module exports PWM wave to chopper circuit and controls opening for MOSFET pipes
It closes, MOSFET pipes correspond to connected single battery and PWM wave is followed to be turned on and off, and make single battery of the energy from high energy
To adjacent deficient energy single battery transfer, reach balanced.
Further, the threshold pressure differential V0For 20mV.
The beneficial effects of the invention are as follows：
The equal balance system of the present invention, including whole equalizing circuit and equalization data library module, whole equalizing circuit include multiple lists
Body equalizing circuit, is all provided between adjacent two single batteries there are one monomer equalizing circuit, and pipe is carried out by classification, sub-module
Reason, the division of labor is defined, is simple and efficient, logic is close so that detection is more in real time, comprehensively；Wherein, monomer equalizing circuit includes copped wave
Circuit, voltage acquisition module, main control module, fuzzy controller and drive module, it is with strong points, it is suitable for the power without magnitude
Battery pack, flexibility are stronger；
The equalization methods of the present invention make ratio according to the terminal voltage of two neighboring single battery, pressure difference with the threshold pressure differential of setting
Compared with, judge respectively two neighboring single battery whether need to carry out it is balanced, avoid it is individual owe can the detections of single batteries omit
Situation, real-time high-efficiency solve electric powered motor packet battery long-time service in the prior art and single battery energy occur and differ
The problem of cause, makes energy between adjacent cells from the single battery of high energy to the single battery transfer of deficient energy, finally makes entirety
The energy content of battery is kept in balance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is monomer equalizing circuit schematic diagram；
Fig. 2 is the flow diagram of the method for the present invention；
Fig. 3 is whole equalizing circuit schematic diagram in embodiment；
Fig. 4 is the flow diagram of method in embodiment；
It is marked in figure：1, chopper circuit, 2, voltage acquisition module, 3, main control module, 4, fuzzy controller, 5, drive module, 6,
Equalization data library module.
Specific implementation mode
Specific embodiment is given below, to technical scheme of the present invention make further it is clear, complete, explain in detail.This
Embodiment is most preferred embodiment based on the technical solution of the present invention, but protection scope of the present invention is not limited to following implementation
Example.
A kind of equal balance system of Vehicular dynamic battery, including N number of concatenated single battery further include whole equalizing circuit and equal
Weigh database module 6, and the entirety equalizing circuit includes multiple monomer equalizing circuits；
Monomer equalizing circuit there are one being all provided between two adjacent single batteries, as shown in Figure 1, the monomer equalizing circuit packet
Chopper circuit 1, voltage acquisition module 2, main control module 3, fuzzy controller 4 and drive module 5 are included, the chopper circuit 1 is by 2
Inductance L, 1 capacitance C, 2 diode D, 2 MOSFET pipes form, and pass through capacitance C parallel connections, single institute between 2 diode D
The diode D stated is in parallel with single MOSFET pipes, and the MOSFET manages, institute in parallel by inductance L respectively between single battery
The positive and negative anodes for stating single battery are connect with the both ends of monomer equalizing circuit respectively, the positive and negative anodes of the single battery respectively with voltage
Acquisition module 2 connects, and the voltage acquisition module 2, fuzzy controller 4 are connect with the main control module 3 respectively, the Fuzzy Control
Device 4 processed is connected with drive module 5, and the both ends of the drive module 5 are connect with 2 MOSFET pipes.
Further, the N is natural number, and N >=2.
Further, the monomer equalizing circuit, chopper circuit 1 number be（N-1）It is a, N number of concatenated monomer electricity
Pond corresponds to（N-1）To neighboring unit cell, 2（N-1）A inductance L,（N-1）A capacitance C, 2（N-1）A diode D, 2（N-1）It is a
MOSFET is managed.
Further, the equalization data library module 6 is connect with main control module 3, and the equalization data library module 6 includes whole
Body balance policy unit, equilibrium, which are opened, closes criterion unit and euqalizing current size criterion unit；The equalization data library module 6
For storing parameter, two adjacent single batteries of the top-down detection of auxiliary main control module 3；
The voltage acquisition module 2 in real time acquire single battery terminal voltage, and by two neighboring single battery terminal voltage,
Pressure difference is sent to main control module 3；
The main control module 3 is for judging whether two neighboring single battery needs to carry out equilibrium, and control fuzzy controller 4
With drive module 5；
The fuzzy controller 4 is used on the basis of monomer equalizing circuit, and the PWM wave to controlling MOSFET pipes carries out duty ratio
It adjusts, realizes the power transformation flow control to balance stage；
The drive module 5 controls the switch of MOSFET pipes for exporting PWM wave, and driving monomer equalizing circuit works, and right
The single battery for owing energy charges.
Further, the MOSFET pipes are N-channel MOS FET pipes.
Further, equal balance system of the invention, by classification, sub-module be managed, the division of labor define, be simple and efficient,
Logic is close so that detection is more in real time, comprehensively；Wherein, monomer equalizing circuit include chopper circuit 1, voltage acquisition module 2,
Main control module 3, fuzzy controller 4 and drive module 5, it is with strong points, it is suitable for the power battery pack without magnitude, flexibility is more
By force；
As shown in Fig. 2, a kind of equalization methods of the equal balance system of Vehicular dynamic battery, include the following steps：
S1：Defined parameters：Equalization data library module 6 sets threshold pressure differential as V0, single battery terminal voltage collection value be VBX, phase
The pressure difference collection value of adjacent two single batteries is, wherein the value of X be 1,2 ..., N；
S2：The equal balance system is balanced criterion with the terminal voltage of single battery, when time for balance is stationary vehicle, the equal balance system
Itself can work, and be not necessarily to external charging；
S3：When equilibrium starts, the voltage acquisition module 2 of monomer equalizing circuit acquires two neighboring single battery in real time respectively
Terminal voltage, according to sequencing by the terminal voltage V of two neighboring single batteryBX、VB(X+1), pressure differenceIt is sent to master control mould
Block 3；
S4：Main control module 3 calls equalization data library module 6, and from the beginning two single batteries start, top-down to judge adjacent two
The pressure difference of a single batteryWhether the threshold pressure differential V of setting is more than0；
S41：If pressure difference is more than threshold pressure differential, i.e.,, then equilibrium is opened, main control module 3 will
VBX、VB(X+1), pressure differenceIt is sent to fuzzy controller 4,4 output duty cycle data of fuzzy controller to drive module 5 are driven
Dynamic model block 5 exports PWM wave to chopper circuit 1 and controls the switch of MOSFET pipes, to drive monomer equalizing circuit to work, to owing
The single battery of energy charges；
S411：Based on S41, the pressure difference of 3 real-time judge of the main control module two neighboring single battery, if pressure difference is less than pressure difference threshold
Value, i.e.,, then stop equilibrium；
Further, main control module 3 judges the pressure difference of the two neighboring single battery, the time interval every a time interval
For 0.01s, on the one hand, to the time interval of one buffering of single battery, be allowed to energy and tend towards stability, so that detecting and adopting
Collection is more accurate；On the other hand, reduce the working strength of the equal balance system, ensure the real-time of modules work, sensitivity,
Effective reliability；
S42：Based on S41, otherwise, if pressure difference is 0, i.e.,, then the two neighboring single battery
Without equilibrium, main control module 3 continues to judge whether remaining two neighboring single battery needs to carry out equilibrium downwards；
S5：Main control module 3 continues to judge the terminal voltage and pressure difference of remaining two neighboring single battery according to sequencing, and constantly
Step S4 is repeated, until all single battery terminal voltages reach almost the same.
Further, the collection value V of the terminal voltage of the single batteryBXRespectively VB1、VB2、...、VBN。
Further, in the step S41, fuzzy controller 4 is carried out according to fuzzy control rule table and membership function
It calculates, ambiguity solution obtains duty cycle data.
Further, in the step S41, drive module 5 exports PWM wave to chopper circuit 1 and controls MOSFET pipes
Switch, MOSFET pipes correspond to connected single battery and PWM wave are followed to be turned on and off, and make monomer electricity of the energy from high energy
Pond reaches balanced to adjacent deficient energy single battery transfer.
Further, the threshold pressure differential V0For 20mV.
Further, equalization methods of the invention, according to the terminal voltage of two neighboring single battery, pressure difference, with setting
Threshold pressure differential is made comparisons, and judges whether two neighboring single battery needs to carry out equilibrium respectively, avoids individual deficient energy monomer electricity
Situation is omitted in the detection in pond, and real-time high-efficiency solves electric automobile power battery packet in the prior art and the list occurred is used for a long time
Body energy content of battery inconsistence problems make energy be turned between adjacent cells from the single battery of high energy to the single battery of deficient energy
It moves, integral battery energy is finally made to keep in balance.
Embodiment 1
When the value of N takes 4, as shown in figure 3, in the present embodiment, which includes 4 concatenated single batteries, and adjacent two
Be all provided between a single battery there are one monomer equalizing circuit, then the monomer equalizing circuit, chopper circuit 1 number be 3
It is a, 4 concatenated single batteries in total correspond to 3 pairs of neighboring unit cells, 6 inductance L, 3 capacitance C, 6 diode D, 6
MOSFET is managed；
As shown in figure 4, the value of X is respectively 1,2,3,4, then the terminal voltage collection value of single battery is respectively VB1、VB2、VB3、
VB4, then the pressure difference acquired is respectively、、；Further, define 4 single batteries be respectively single battery I,
Ⅱ、Ⅲ、Ⅳ；MOSFET pipes between single battery I, II in corresponding monomer equalizing circuit are respectively MOSFET pipes I, II,
MOSFET pipes I, II corresponding switch are respectively switch I, II；Between single battery II, III in corresponding monomer equalizing circuit
MOSFET pipes are respectively MOSFET pipes III, IV, MOSFET pipes III, IV corresponding switch respectively switch III, IV；Single battery
III, the MOSFET pipes between IV in corresponding monomer equalizing circuit are respectively that MOSFET pipes V, VI, MOSFET pipes V, VI correspond to
Switch be respectively switch V, VI；
We illustrate below, to pressure differenceIt is analyzed：
Corresponding step S41, if, equilibrium is opened, then is divided into following two situations：
（1）、, when specific balanced, main control module 3 is by VB1、VB2, pressure differenceIt is sent to fuzzy controller 4, is obscured
4 output duty cycle data of controller to drive module 5, drive module 5 exports PWM wave to chopper circuit 1 and controls MOSFET pipes I
Switch I, MOSFET pipes I correspond to connected single battery I, by calling equalization data library module 6 and PWM wave being followed to be opened
Close I it is open-minded, and then make energy from the single battery I of high energy to it is adjacent it is deficient can single battery II shift, it is balanced until reaching,
I.e., then I is turned off the switch, is stopped balanced；
（2）、, when specific balanced, main control module 3 is by VB1、VB2, pressure differenceIt is sent to fuzzy controller 4, is obscured
To drive module 5, drive module 5 exports PWM wave to chopper circuit 1 and controls MOSFET pipes 4 output duty cycle data of controller
II switch II, MOSFET pipes II correspond to connected single battery II, by calling equalization data library module 6 and following PWM wave
The open-minded of switch II is carried out, and then energy is made to be shifted from the single battery II of high energy to adjacent deficient energy single battery I, Zhi Daoda
To equilibrium, that is,, then II is turned off the switch, is stopped balanced；
Corresponding step S42, if, i.e.,, then without equal between adjacent single battery I, II
Weighing apparatus, at this point, main control module 3 continues directly to judge remaining two neighboring single battery downwards, i.e., adjacent single battery II, III it
Between whether need to carry out it is balanced；
Similarly, between adjacent single battery II, III, above-mentioned situation point is repeated between adjacent single battery III, IV respectively
Analysis then completes whole equilibrium until the terminal voltage of all single batteries I, II, III, IV reaches almost the same.
In conclusion a kind of equal balance system of Vehicular dynamic battery of the present invention and its equalization methods, solve electric in the prior art
There is the inconsistent problem of single battery energy in the long-time service of electrical automobile power battery pack, is arranged in pairs or groups using equal balance system corresponding equal
Weighing apparatus method, is simple and efficient, logic is close, accuracy and degree of control are high, makes energy between adjacent cells by the monomer of high energy electricity
Single battery transfer of the pond to deficient energy, finally makes integral battery energy keep in balance.
Main feature, basic principle and the advantages of the present invention of the present invention has been shown and described above.Industry technology
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention can also have various change according to actual conditions
And improvement, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended
Claims and its equivalent thereof.
Claims (10)
1. a kind of equal balance system of Vehicular dynamic battery, including N number of concatenated single battery, it is characterised in that：Further include whole equal
Weigh circuit and equalization data library module（6）, the entirety equalizing circuit includes multiple monomer equalizing circuits；
Monomer equalizing circuit there are one being all provided between two adjacent single batteries, the monomer equalizing circuit includes chopper circuit
（1）, voltage acquisition module（2）, main control module（3）, fuzzy controller（4）And drive module（5）, the chopper circuit（1）By 2
A inductance L, 1 capacitance C, 2 diode D, 2 MOSFET pipes form, in parallel by capacitance C between 2 diode D, individually
The diode D is in parallel with single MOSFET pipes, and the MOSFET pipes are in parallel by inductance L respectively between single battery,
The positive and negative anodes of the single battery are connect with the both ends of monomer equalizing circuit respectively, the positive and negative anodes of the single battery respectively with electricity
Press acquisition module（2）Connection, the voltage acquisition module（2）, fuzzy controller（4）Respectively with the main control module（3）Connection,
The fuzzy controller（4）It is connected with drive module（5）, the drive module（5）Both ends connect with 2 MOSFET pipes.
2. the equal balance system of a kind of Vehicular dynamic battery according to claim 1, it is characterised in that：The N is natural number, and
N≥2。
3. the equal balance system of a kind of Vehicular dynamic battery according to claim 1, it is characterised in that：The balanced electricity of the monomer
Road, chopper circuit（1）Number be（N-1）A, N number of concatenated single battery corresponds to（N-1）To neighboring unit cell, 2（N-
1）A inductance L,（N-1）A capacitance C, 2（N-1）A diode D, 2（N-1）A MOSFET pipes.
4. the equal balance system of a kind of Vehicular dynamic battery according to claim 1, it is characterised in that：Equalization data library mould
Block（6）With main control module（3）Connection, the equalization data library module（6）Closing is opened including whole balance policy unit, equilibrium
Criterion unit and euqalizing current size criterion unit；The equalization data library module（6）For storing parameter, main control module is assisted
（3）Two adjacent single batteries of top-down detection；
The voltage acquisition module（2）Terminal voltage for acquiring single battery in real time, and two neighboring single battery end is electric
Pressure, pressure difference are sent to main control module（3）；
The main control module（3）For judging whether two neighboring single battery needs to carry out equilibrium, and control fuzzy control
Device（4）And drive module（5）；
The fuzzy controller（4）For on the basis of monomer equalizing circuit, the PWM wave to controlling MOSFET pipes to carry out duty
Than adjusting, the power transformation flow control to balance stage is realized；
The drive module（5）The switch of MOSFET pipes is controlled for exporting PWM wave, driving monomer equalizing circuit works, and
Single battery to owing energy charges.
5. the equal balance system of a kind of Vehicular dynamic battery according to claim 1, it is characterised in that：The MOSFET pipes are N
Channel mosfet pipe.
6. a kind of equalization methods of the equal balance system of Vehicular dynamic battery, it is characterised in that：Include the following steps：
S1：Defined parameters：Equalization data library module（6）Threshold pressure differential is set as V0, single battery terminal voltage collection value be VBX、
The pressure difference collection value of two neighboring single battery is, wherein the value of X be 1,2 ..., N；
S2：The equal balance system is balanced criterion with the terminal voltage of single battery, when time for balance is stationary vehicle, the equal balance system
Itself can work, and be not necessarily to external charging；
S3：When equilibrium starts, the voltage acquisition module of monomer equalizing circuit（2）Acquire two neighboring single battery in real time respectively
Terminal voltage, according to sequencing by the terminal voltage V of two neighboring single batteryBX、VB(X+1), pressure differenceIt is sent to master control
Module（3）；
S4：Main control module（3）Call equalization data library module（6）, from the beginning two single batteries start, top-down judgement phase
The pressure difference of adjacent two single batteriesWhether the threshold pressure differential V of setting is more than0；
S41：If pressure difference is more than threshold pressure differential, i.e.,, then equilibrium, main control module are opened（3）It will
VBX、VB(X+1), pressure differenceIt is sent to fuzzy controller（4）, fuzzy controller（4）Output duty cycle data are to drive module
（5）, drive module（5）To chopper circuit（1）Output PWM wave and the switch for controlling MOSFET pipes, to drive the balanced electricity of monomer
Road works, and the single battery to owing energy charges；
S411：Based on S41, main control module（3）The pressure difference of the real-time judge two neighboring single battery, if pressure difference is less than pressure difference threshold
Value, i.e.,, then stop equilibrium；
S42：Based on S41, otherwise, if pressure difference is 0, i.e.,, then the two neighboring single battery without
Need equilibrium, main control module（3）It is balanced that continuation judges downwards whether remaining two neighboring single battery needs to carry out；
S5：Main control module（3）Continue to judge the terminal voltage and pressure difference of remaining two neighboring single battery according to sequencing, not
It is disconnected to repeat step S4, until all single battery terminal voltages reach almost the same.
7. a kind of equalization methods of the equal balance system of Vehicular dynamic battery according to claim 6, it is characterised in that：The list
The collection value V of the terminal voltage of body batteryBXRespectively VB1、VB2、...、VBN。
8. a kind of equalization methods of the equal balance system of Vehicular dynamic battery according to claim 6, it is characterised in that：The step
In rapid S41, fuzzy controller（4）It is calculated according to fuzzy control rule table and membership function, ambiguity solution obtains duty ratio
Data.
9. a kind of equalization methods of the equal balance system of Vehicular dynamic battery according to claim 6, it is characterised in that：The step
In rapid S41, drive module（5）To chopper circuit（1）Output PWM wave and the switch for controlling MOSFET pipes, MOSFET pipes correspond to phase
Single battery even simultaneously follows PWM wave to be turned on and off, make energy from the single battery of high energy to it is adjacent it is deficient can monomer
Battery transfer reaches balanced.
10. a kind of equalization methods of the equal balance system of Vehicular dynamic battery according to claim 6, it is characterised in that：It is described
Threshold pressure differential V0For 20mV.
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