CN209505504U - Power battery and system - Google Patents
Power battery and system Download PDFInfo
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- CN209505504U CN209505504U CN201920024395.7U CN201920024395U CN209505504U CN 209505504 U CN209505504 U CN 209505504U CN 201920024395 U CN201920024395 U CN 201920024395U CN 209505504 U CN209505504 U CN 209505504U
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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
- 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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Abstract
The utility model provides a kind of power battery and system, is related to the technical field of power battery, comprising: multiple concatenated power battery intelligence monomers, each power battery intelligence monomer include: power battery pack and intelligent piece controller；Intelligent piece controller is used to acquire the electrical parameter of power battery intelligence monomer and is sent to the power battery controller of power battery pack, so that power battery controller determines the charge/discharge buck ratio of power battery pack based on electrical parameter；Intelligent piece controller is also used to receive the charge/discharge buck ratio of power battery controller transmission, the energy transfer based on charge/discharge buck than controlling power battery pack and external equipment.The power battery can alleviate the technical issues of existing power battery pack increases itself invalid Charge/Discharge Cycles during the work time and generates unnecessary energy loss according to the charge/discharge buck received than realizing that the energy transfer to power battery pack and external equipment carries out balanced management.
Description
Technical field
The utility model relates to power battery technology fields, more particularly, to a kind of power battery and system.
Background technique
Power battery pack is the power source of electric car and vehicle is most important, one of component of most expensive, power battery
Group is usually in parallel by more piece power battery monomer, then connects again and generates high voltage and high current, although when original state, often
The performance parameter of one power battery monomer is almost the same, but during continuous cycle charging and electric discharge, each power
Difference can occur for the parameters of battery cell, affect the optimal performance of power battery, in order to guarantee that power battery plays it
Optimal performance extends the service life of power battery monomer, it is necessary to carry out rationally and effectively balanced management to power battery monomer.
The balancing technique of existing power battery be divided into active equalization with it is passive balanced, passive equilibrium generallys use balanced electric
Resistance is connected to power battery monomer both ends by equalizer switch, is monitored by microcontroller to single battery, is opened for reaching
The power battery monomer of trimming threshold consumes energy by closure equalizer switch, by equalizing resistance, to realize battery cell
Equilibrium will cause unnecessary energy loss in balancing procedure although this equalization methods implementation is simple；It is right
In active equalization technology, mostly uses inductance, capacitor as energy-storage travelling wave tube at present, realize between single battery or between battery pack
Energy transfer.This kind of method equally exists disadvantage: will increase battery itself invalid charge/discharge time during energy transfer
Number, reduces battery Acceptable life.
In conclusion existing power battery pack during the work time exist increase itself invalid Charge/Discharge Cycles and
The technical issues of generating unnecessary energy loss.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of power battery and system, to alleviate existing power
The technical issues of battery pack increases itself invalid Charge/Discharge Cycles during the work time and generates unnecessary energy loss.
In a first aspect, the utility model embodiment provides a kind of power battery, comprising: multiple concatenated power battery intelligence
Can monomer, each power battery intelligence monomer includes: power battery pack and intelligent piece controller, and the power battery
Group is in parallel with the intelligent piece controller；
The intelligence piece controller is used to acquire the electrical parameter of the power battery intelligence monomer, and by the electricity
Parameter is sent to the power battery controller of the power battery pack, so that the power battery controller is joined based on the electricity
Number determines the charge/discharge buck ratio of the power battery pack, wherein the electrical parameter includes: the power battery pack
The end voltage of voltage, the end voltage of the intelligence piece controller, the intelligence piece controller indicates described in discharge process
The input terminal voltage of intelligence piece controller described in the output end voltage or charging process of intelligent piece controller；
The intelligence piece controller is also used to receive the charge/discharge buck that the power battery controller is sent
Than the energy transfer based on the charge/discharge buck more described than control power battery pack and external equipment.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, the intelligence piece controller includes: voltage ring controller, current loop controller and bidirectional Buck-Boost converter；
The voltage ring controller respectively with the power battery controller, the power battery pack and the electric current loop control
Device processed connection, for acquire the power battery pack voltage and the intelligent piece controller end voltage and be sent to described
Power battery controller；
The voltage ring controller be also used to receive the filling of the power battery pack that the power battery controller is sent/
Discharge buck ratio, than determining target current and is sent to the current loop controller based on the charge/discharge buck,
In, the target current is used to make the voltage of the power battery pack of the output voltage in discharge process and the charge/discharge
The product of buck ratio or for make the power battery pack in charging process voltage charge limit value voltage, the charging
Limit value voltage is the fixed voltage of setting；
The current loop controller is connect with the bidirectional Buck-Boost converter, for receiving the target current, and
The output electric current of the bidirectional Buck-Boost converter is acquired, and determines described pair based on the target current and the output electric current
To the running parameter of buck-boost converter, wherein the running parameter includes: the duty ratio of impulse wave；
The bidirectional Buck-Boost converter is connect with the power battery pack, for the duty ratio control based on the impulse wave
It makes the power battery pack and external equipment carries out energy transfer.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, the voltage ring controller includes: voltage collector, communication module and the first data processor；
The voltage collector is connect with the power battery pack and the communication module respectively, for acquiring the power
The end voltage of the voltage of battery pack and the intelligent piece controller, and the power battery is sent to by the communication module
Controller；
The communication module is also connect with first data processor, is sent for receiving the power battery controller
The power battery pack charge/discharge buck ratio, and the charge/discharge buck ratio of the power battery monomer is sent to
First data processor；
First data processor is for the charge/discharge buck based on the power battery monomer than determining the mesh
Mark electric current is simultaneously sent to the current loop controller by the communication module.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In, the current loop controller includes: current collector and the second data processor；
The current collector respectively with the bidirectional Buck-Boost converter, the voltage ring controller and it is described second number
It connects according to processor, is sent for acquiring the output electric current of the bidirectional Buck-Boost converter and receiving the voltage ring controller
The target current, and the output electric current and the target current are sent to second data processor；
Second data processor determines the Bidirectional up-down buckling based on the output electric current and the target current
The running parameter of parallel operation.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, the bidirectional Buck-Boost converter includes: impulse generator and voltage control circuit；
The impulse generator is connect with the voltage control circuit, for generating impulse wave based on the duty ratio；
The voltage control circuit is used to control the power battery pack based on the impulse wave and external equipment carries out energy
Amount transfer.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, the voltage control circuit includes: first capacitor, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, inductance, third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor
With the second capacitor；
The first capacitor is in parallel with the intelligent input terminal of piece controller, the first end of the first capacitor and institute
The source electrode connection of the first metal-oxide-semiconductor is stated, the second end of the first capacitor is connect with the source electrode of second metal-oxide-semiconductor；
The drain electrode of first metal-oxide-semiconductor is connect with the first end of the drain electrode of second metal-oxide-semiconductor and the inductance respectively, institute
The second end for stating inductance is connect with the source electrode of the drain electrode of the third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor respectively；
The source electrode of the third metal-oxide-semiconductor source electrode with second metal-oxide-semiconductor respectively, the first end of second capacitor and institute
State the cathode connection of power battery pack, the second end of second capacitor respectively with the drain electrode of the 4th metal-oxide-semiconductor and described dynamic
The anode connection of power battery pack；
The grid of first metal-oxide-semiconductor is connect with the first end of the impulse generator, the grid of second metal-oxide-semiconductor with
The second end of the impulse generator connects, and the grid of the third metal-oxide-semiconductor is connect with the third end of the impulse generator, institute
The grid for stating the 4th metal-oxide-semiconductor is connect with the 4th end of the impulse generator.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In, the communication mode of the communication module includes at least: the communication mode and SPI communication mode of CAN bus.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, the power battery pack includes at least a section power battery monomer.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, the power battery further include: shell；
The multiple concatenated power battery intelligence monomer is set in the shell.
Second aspect, the utility model embodiment also provide a kind of electrokinetic cell system, and the system comprises above-mentioned first
Power battery described in aspect, further includes: power battery controller；
Wherein, the power battery controller and the power battery communicate to connect, for obtaining preset charged limitation electricity
Pressure and the charge/discharge buck ratio for determining the power battery pack.
The utility model embodiment brings following the utility model has the advantages that the utility model embodiment provides a kind of power battery
And system, the battery include: multiple concatenated power battery intelligence monomers, each power battery intelligence monomer includes: power electric
Pond group and intelligent piece controller, and power battery pack is in parallel with intelligent piece controller；Intelligent piece controller is for acquiring
The electrical parameter of power battery intelligence monomer, and electrical parameter is sent to the power battery controller of power battery pack, so that
Power battery controller determines the charge/discharge buck ratio of power battery pack based on electrical parameter, wherein electrical parameter includes:
The end voltage of the voltage of power battery pack, the end voltage of intelligent piece controller, intelligent piece controller indicates in discharge process
The input terminal voltage of intelligent piece controller in the output end voltage or charging process of intelligent piece controller；Intelligent monomer control
Device is also used to receive the charge/discharge buck ratio of power battery controller transmission, based on charge/discharge buck than control power electric
The energy transfer of Chi Zuyu external equipment.
Compared with existing power battery pack, the power battery of the utility model can be acquired by intelligent piece controller
The electrical parameter of power battery intelligence monomer, and electrical parameter is sent to the power battery controller of power battery pack, so that
Power battery controller determines the charge/discharge buck ratio of power battery pack based on electrical parameter and is sent to corresponding intelligence list
Body controller, then the intelligent piece controller of power battery is based on the charge/discharge buck received than realizing to power electric
The energy transfer of Chi Zuyu external equipment carries out balanced management, and there is no the energy between power battery pack to turn for the process of the equilibrium
Move, alleviate existing power battery pack during the work time and will increase itself invalid Charge/Discharge Cycles and generate it is unnecessary
Energy loss the technical issues of.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of power battery provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of another power battery provided by the embodiment of the utility model；
Fig. 3 is a kind of structural schematic diagram of power battery intelligence monomer provided by the embodiment of the utility model；
Fig. 4 is a kind of structural schematic diagram of voltage control circuit provided by the embodiment of the utility model；
Fig. 5 is a kind of structural schematic diagram of electrokinetic cell system provided by the embodiment of the utility model.
Icon:
1- power battery；2- power battery controller；11- power battery intelligence monomer；111- power battery pack；112- intelligence
It can piece controller.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
For convenient for understanding the present embodiment, first to a kind of power battery disclosed in the utility model embodiment into
Row is discussed in detail.
Embodiment one:
A kind of power battery 1, with reference to Fig. 1 and Fig. 2, comprising: multiple concatenated power battery intelligence monomers 11, each power
Battery intelligent monomer 11 includes: power battery pack 111 and intelligent piece controller 112, and power battery pack 111 and intelligent monomer
Controller 112 is in parallel；
Intelligent piece controller 112 is used to acquire the electrical parameter of power battery intelligence monomer 11, and electrical parameter is sent out
It send to the power battery controller of power battery pack 111, so that power battery controller determines power battery based on electrical parameter
The charge/discharge buck ratio of group 111, wherein electrical parameter includes: the voltage of power battery pack 111, intelligent piece controller
112 end voltage, the end voltage of intelligent piece controller 112 indicate the output end of intelligent piece controller 112 in discharge process
The input terminal voltage of intelligent piece controller 112 in voltage or charging process；
Intelligent piece controller 112 is also used to receive the charge/discharge buck ratio of power battery controller transmission, is based on
Energy transfer of the charge/discharge buck than controlling power battery pack 111 and external equipment.
In the utility model embodiment, which includes multiple concatenated power battery intelligence monomers 11, is such as schemed
Shown in 3, each power battery intelligence monomer 11 includes power battery pack 111 and the intelligent monomer in parallel with power battery pack 111
Controller 112, when power battery 1 works, intelligent piece controller 112 can acquire the power battery intelligence monomer where it
11 electrical parameter, and electrical parameter is sent to the power battery controller of power battery pack 111, so that power battery controls
Device determines the charge/discharge buck ratio of power battery pack 111 based on electrical parameter, wherein electrical parameter includes: power battery pack
111 voltage, the end voltage of intelligent piece controller 112, the difference according to the work of power battery 1 in charge/discharge state, intelligence
The end voltage of piece controller 112 indicates in discharge process in the output end voltage of intelligent piece controller 112 or charging process
The input terminal voltage of intelligent piece controller 112.
After power battery controller has determined the charge/discharge buck ratio of each power battery pack 111, by it is each fill/
Electric discharge buck ratio is sent to corresponding intelligent piece controller 112, and intelligent piece controller 112 will be gone up and down based on charge/discharge
Pressure ratio controls the energy transfer of corresponding power battery pack 111 and external equipment, if what intelligent piece controller 112 received
Charge/discharge buck is greater than 1 than the ratio of the power battery pack buck ratio with original state, will accelerate power battery pack 111
With the energy transfer speed of external equipment, if charge/discharge buck ratio and initial shape that intelligent piece controller 112 receives
The ratio of the power battery pack buck ratio of state will slow down the energy transfer speed of power battery pack 111 and external equipment less than 1
Degree.
In order to make it easy to understand, being exemplified below:
If power battery 1 is made of 3 concatenated power battery intelligence monomers 11, when electric discharge, power battery controller is adopted
The voltage for collecting power battery pack 111 is respectively as follows: 3V, 4V, 5V, for each power battery pack 111 in uniform power battery 1
With the energy transfer of external equipment, it should the power battery pack 111 higher than average voltage level be made to accelerate the energy with external equipment
Transfer velocity makes the power battery pack 111 lower than average voltage level slow down the energy transfer speed with external equipment, so 5V
Power battery pack 111 is received than preset power battery pack buck than high electric discharge step-up ratio, and the power battery pack 111 of 3V connects
It receives than preset power battery pack buck than low electric discharge step-up ratio；When charging, if the preset charged of power battery pack 111
Limitation voltage is 5V, and the input terminal voltage of collected intelligence piece controller 112 is respectively 4V, 5V, 6V, then should make defeated
Enter to hold the power battery intelligence monomer that voltage is 4V to carry out boost charge, makes the power battery intelligence monomer of input terminal voltage 6V
Decompression charging is carried out, so the power battery pack 111 of 4V receives the charging pressure-boosting of power battery controller transmission than 1.25,6V
Power battery pack 111 receive power battery controller transmission charging step-down ratio 0.83.
It includes: multiple concatenated power electrics that the utility model embodiment, which provides a kind of power battery and system, the battery,
Pond intelligence monomer 11, each power battery intelligence monomer 11 include: power battery pack 111 and intelligent piece controller 112, and dynamic
Power battery pack 111 is in parallel with intelligent piece controller 112；Intelligent piece controller 112 is for acquiring power battery intelligence monomer
11 electrical parameter, and electrical parameter is sent to the power battery controller of power battery pack 111, so that power battery controls
Device determines the charge/discharge buck ratio of power battery pack 111 based on electrical parameter, wherein electrical parameter includes: power battery pack
The end voltage of 111 voltage, the end voltage of intelligent piece controller 112, intelligent piece controller 112 indicates intelligence in discharge process
The input terminal voltage of intelligent piece controller 112 in the output end voltage or charging process of energy piece controller 112；Intelligent monomer
Controller 112 is also used to receive the charge/discharge buck ratio of power battery controller transmission, based on charge/discharge buck than control
The energy transfer of brake force battery pack 111 and external equipment.
Compared with existing power battery pack 111, the power battery 1 of the utility model can pass through intelligent piece controller
112 acquire the electrical parameter of power battery intelligence monomers 11, and electrical parameter is sent to the power battery of power battery pack 111
Controller, so that power battery controller determines the charge/discharge buck ratio of power battery pack 111 based on electrical parameter and sends
To corresponding intelligent piece controller 112, then the intelligent piece controller 112 of power battery 1 is based on the charge/discharge received
Buck than realizing that the energy transfer to power battery pack 111 and external equipment carries out balanced management, do not deposit by the process of the equilibrium
Energy transfer between power battery pack 111, alleviate existing power battery pack 111 will increase itself during the work time
The technical issues of invalid Charge/Discharge Cycles are with unnecessary energy loss is generated.
Above content briefly describes the course of work of the power battery 1 of the utility model, below to wherein relating to
And to specific structure describe in detail.
In an optional embodiment, intelligent piece controller 112 includes: voltage ring controller, current loop control
Device and bidirectional Buck-Boost converter；
Respectively with power battery controller, power battery pack 111 connects with current loop controller, is used for voltage ring controller
It acquires the voltage of power battery pack 111 and the end voltage of intelligent piece controller 112 and is sent to power battery controller；
Voltage ring controller is also used to receive the charge/discharge lifting of the power battery pack 111 of power battery controller transmission
Pressure ratio than determining target current and is sent to current loop controller based on charge/discharge buck, wherein target current is for making
Output voltage in discharge process is the voltage of power battery pack 111 with the product of charge/discharge buck ratio or for making to charge
The voltage of power battery pack 111 in the process is charging limit value voltage, and charging limit value voltage is the fixed voltage of setting；
Current loop controller is connect with bidirectional Buck-Boost converter, for receiving target current, and acquisition Bidirectional up-down
The output electric current of buckling parallel operation, and the running parameter of bidirectional Buck-Boost converter is determined based on target current and output electric current,
In, running parameter includes: the duty ratio of impulse wave；
Bidirectional Buck-Boost converter is connect with power battery pack 111, controls power electric for the duty ratio based on impulse wave
Pond group 111 and external equipment carry out energy transfer.
Specifically, intelligent piece controller 112 is mainly by voltage ring controller, current loop controller and Bidirectional up-down buckling
Change device composition, when charged state, voltage ring controller is used to acquire the input terminal voltage of intelligent piece controller 112, and discharge shape
When state, voltage ring controller is used to acquire the voltage of power battery pack 111 and the output end voltage of intelligent piece controller 112,
After the completion of acquisition, need collected all voltages being sent to power battery controller.
Further, power battery controller based on all voltages received determine the filling of each power battery pack 111/
Discharge buck ratio, and the charge/discharge buck ratio of each power battery pack 111 is then sent to corresponding Voltage loop and is controlled
Device, voltage ring controller make the difference the end voltage of collected intelligent piece controller 112 with target voltage, calculate practical defeated
The deviation of outlet voltage and target voltage is adjusted using Voltage loop PI (proportional integral, proportional integration)
Section, during Voltage loop PI is adjusted, reality output end voltage and target voltage constitute control deviation, wherein target voltage is
Power battery pack 111 in the product or charging process of the voltage of power battery pack 111 and electric discharge buck ratio in discharge process
The ratio of control deviation and integral are obtained control amount by linear combination by charging limitation voltage (fixed voltage set),
Proportion adjustment and autocatalytic reset action in the adjusting of PI are the deviation for proportionally reflecting system, and system once occurs partially
Difference, proportion adjustment just generate adjustment effect immediately and reduce deviation, and proportion adjustment can not make deviation 0 completely, in practice system
There are still steady-state error, the steady-state error for system of eliminating is improved errorless margin by integral adjustment this moment, is adjusted by PI
After proportion adjustment and integral adjustment, voltage ring controller will export control amount (control amount dimensionless), this control amount is electric current loop
Carry out the target current value in PI adjustment process, wherein the target current is the electricity for guaranteeing power battery pack 111 in charging process
Pressure is the defeated of the intelligent piece controller 112 in charging limit value voltage (fixed voltage set), and guarantee discharge process
Voltage is the voltage of power battery pack 111 and the product of electric discharge buck ratio out.
Further, the target current of output is sent to current loop controller, current loop controller by voltage ring controller
It is also connect with bidirectional Buck-Boost converter, the output electric current of bidirectional Buck-Boost converter is acquired, current loop controller will
The output electric current of target current and bidirectional Buck-Boost converter makes the difference, and calculates the output electric current and mesh of bidirectional Buck-Boost converter
The deviation for marking electric current is adjusted using electric current loop PI, during electric current loop PI is adjusted, the output of bidirectional Buck-Boost converter
Electric current and target current constitute control deviation, the processing of control deviation are directed in electric current loop PI adjustment process, with above voltage
The process that ring PI is adjusted is consistent, and details are not described herein again, according to control deviation under the action of proportion adjustment and integral adjustment the two
PI adjusting is carried out, system will calculate the running parameter of bidirectional Buck-Boost converter in PI adjustment process, wherein running parameter packet
Include: the duty ratio of impulse wave, the duty ratio by changing impulse wave realize that the output end of bidirectional Buck-Boost converter exports target
Electric current.
Further, bidirectional Buck-Boost converter is connect with power battery pack 111, can be based on voltage ring controller and electricity
Stream ring controller handle running parameter (that is, duty ratio of impulse wave) control power battery pack 111 and external equipment into
Row energy transfer.The internal structure of bidirectional Buck-Boost converter will be hereinafter described in detail.
Above content is that the course of work of intelligent piece controller 112 is described in detail, below will be to Voltage loop
The course of work of controller describes in detail.
In an optional embodiment, voltage ring controller includes: voltage collector, communication module and the first data
Processor；
Voltage collector is connect with power battery pack 111 and communication module respectively, for acquiring the electricity of power battery pack 111
The end voltage of pressure and intelligent piece controller 112, and power battery controller is sent to by communication module；
Communication module is also connect with the first data processor, for receiving the power battery pack of power battery controller transmission
111 charge/discharge buck ratio, and the charge/discharge buck ratio of power battery monomer is sent to the first data processor；
First data processor is used to than determining target current and pass through based on the charge/discharge buck of power battery monomer
Communication module is sent to current loop controller.
Specifically, voltage ring controller includes: voltage collector, communication module and the first data processor, voltage acquisition
Device is connect with power battery pack 111 and communication module respectively, and voltage ring controller is realized by voltage collector to power battery
The end voltage of the voltage of group 111 and intelligent piece controller 112 is acquired, and the voltage collected is passed through communication module
It is sent to power battery controller.
Further, power battery controller is by the charge/discharge buck for the power battery pack 111 being calculated than sending
To communication module, then, the charge/discharge buck ratio received is sent to the first data processor, the first number by communication module
Control deviation is constituted using reality output end voltage and target voltage according to processor, then is adjusted through Voltage loop PI, above
The Voltage loop PI process adjusted is described in detail, details are not described herein again.First data processing after Voltage loop PI is adjusted
Device will export the target current value in electric current loop progress PI adjustment process, and target current is sent to electric current by communication module
Ring controller.
Above content is that the course of work of voltage ring controller is described in detail, below will be to current loop controller
The course of work describe in detail.
In an optional embodiment, current loop controller includes: current collector and the second data processor；
Current collector with bidirectional Buck-Boost converter, voltage ring controller and the connection of the second data processor, is used respectively
In the target current that the output electric current and reception voltage ring controller of acquisition bidirectional Buck-Boost converter are sent, and electric current will be exported
The second data processor is sent to target current；
Second data processor determines the running parameter of bidirectional Buck-Boost converter based on output electric current and target current.
Specifically, current loop controller includes: current collector and the second data processor, current collector is for receiving
The output electric current of target current and acquisition bidirectional Buck-Boost converter that voltage ring controller is sent, and will output electric current and target
Electric current is sent to the second data processor, and the second data processor constitutes control deviation using output electric current and target current, then
It adjusts, above the electric current loop PI process adjusted is described in detail, details are not described herein again through electric current loop PI.Electricity
The second data processor will export the running parameter of bidirectional Buck-Boost converter after stream ring PI is adjusted, that is, Bidirectional up-down buckling is changed
The duty ratio of all impulse waves in device.
Above content is that the course of work of current loop controller is described in detail, below will be to Bidirectional up-down buckling
The course of work of parallel operation describes in detail.
In an optional embodiment, bidirectional Buck-Boost converter includes: impulse generator and voltage control circuit；
Impulse generator is connect with voltage control circuit, for generating impulse wave based on duty ratio；
Voltage control circuit is used to carry out energy transfer based on impulse wave control power battery pack 111 and external equipment.
Specifically, current loop controller has determined the running parameter of bidirectional Buck-Boost converter (that is, the duty of impulse wave
Than), impulse generator will generate impulse wave based on obtained impulse wave duty ratio, and impulse generator and voltage control circuit connect
It connects, voltage control circuit makes to switch between different working conditions certainly based on the duty ratio of impulse wave, and then controls dynamic
Power battery pack 111 and external equipment carry out energy transfer.It will hereinafter describe in detail to the structure of voltage control circuit.
In an optional embodiment, as shown in figure 4, voltage control circuit includes: first capacitor C1, the first MOS
Pipe VT1, the second metal-oxide-semiconductor VT2, inductance L, third metal-oxide-semiconductor VT3, the 4th metal-oxide-semiconductor VT4 and the second capacitor C2；
First capacitor C1 is in parallel with the intelligent input terminal of piece controller 112, the first end of first capacitor C1 and the first MOS
The source electrode of pipe VT1 connects, and the second end of first capacitor C1 is connect with the source electrode of the second metal-oxide-semiconductor VT2；
The drain electrode of first metal-oxide-semiconductor VT1 is connect with the first end of the drain electrode of the second metal-oxide-semiconductor VT2 and inductance L respectively, inductance L's
Second end is connect with the source electrode of the drain electrode of third metal-oxide-semiconductor VT3 and the 4th metal-oxide-semiconductor VT4 respectively；
The source electrode of the third metal-oxide-semiconductor VT3 source electrode with the second metal-oxide-semiconductor VT2 respectively, the first end and power electric of the second capacitor C2
The cathode of pond group 111 connects, the second end of the second capacitor C2 respectively with the drain electrode of the 4th metal-oxide-semiconductor VT4 and power battery pack 111
Anode connection；
The grid of first metal-oxide-semiconductor VT1 and the first end of impulse generator connect, and the grid of the second metal-oxide-semiconductor VT2 and pulse are sent out
The second end connection of raw device, the grid of third metal-oxide-semiconductor VT3 and the third end of impulse generator connect, the grid of the 4th metal-oxide-semiconductor VT4
Pole and the 4th end of impulse generator connect.
Specifically, impulse generator is by the impulse wave of generation to the first metal-oxide-semiconductor VT1, the 2nd MOS in voltage control circuit
The switch state of pipe VT2, third metal-oxide-semiconductor VT3 and the 4th metal-oxide-semiconductor VT4 are controlled, the arteries and veins that the first end of impulse generator issues
The ON/OFF that wave controls the first metal-oxide-semiconductor VT1 is rushed, the impulse wave that the second end of impulse generator issues controls the second metal-oxide-semiconductor VT2's
ON/OFF, the ON/OFF for the impulse wave control third metal-oxide-semiconductor VT3 that the third end of impulse generator issues, the 4th of impulse generator the
The ON/OFF of the 4th metal-oxide-semiconductor VT4 of end control, by controlling the open/close state of four metal-oxide-semiconductors, and then when to the charge and discharge of inductance L
Between controlled, the final energy transfer for adjusting power battery pack 111 and external equipment realizes the equal of power battery pack 111
Weighing apparatus management.
In an optional embodiment, the communication mode of communication module is included at least: the communication mode of CAN bus and
SPI communication mode.
Specifically, according to the difference of selected voltage ring controller, the communication mode of support will difference, communicate mould
The communication mode of block can be set according to user's actual need, and the utility model is not defined communication mode.
In an optional embodiment, power battery pack 111 includes at least a section power battery monomer.
Specifically, in practical applications, in order to increase the capacity of power battery pack 111, power battery pack 111 is generallyd use
More piece power battery monomer is in parallel, and user can set according to actual needs, and the utility model is not to power battery pack 111
The quantity of middle power battery monomer is defined.
In an optional embodiment, power battery 1 further include: shell；
Multiple concatenated power battery intelligence monomers 11 are set in shell.
In order to improve the practicability of power battery 1, power battery 1 further includes shell, also to prevent artificial damage internal structure
Dust can be resisted and water splashes, guarantee the safety in 1 course of work of power battery.
Inventor has carried out performance verification to the power battery 1 of the utility model, uses DLGNCM18650 ternary in experiment
8 section power battery monomer parallel connections are one group as a power battery pack 111, take 10 concatenated power batteries by lithium battery
Intelligent monomer 11 forms power battery 1, and each power battery pack 111 is equipped with an intelligent piece controller 112, Voltage loop control
Device is acquired the electrical parameter of power battery intelligence monomer 11 using Freescale MC9S12XET256 single-chip microcontroller, and 10 dynamic
Information between power battery intelligent monomer 11 is by the communication mode of CAN bus by collected data transmission to power battery control
In device processed, power battery controller calculates best buck ratio, and power battery 1 is in voltage ring controller, current loop controller
Lower realization boost or depressurization is acted synergistically to the progress balanced management of power battery pack 111 with bidirectional Buck-Boost converter.
In conclusion the utility model has the advantage that
1. the power battery and power battery controller cooperate, power battery under charging and discharging state can be realized
Real-time online active equalization；
2. existing active equalization technology mainly fills the power battery pack of low battery using the power battery pack of high electricity
Electricity, to realize the equilibrium of battery pack, but operation increases the invalid charge and discharge number of power battery in this way, reduces power electric
The power battery of the service life in pond, the utility model can compare each power according to the charge/discharge buck received
Battery pack and the energy transfer of external equipment carry out well-balanced adjustment, and there is no the energy transfers between power battery pack, solve
The problem of invalid charge and discharge number.
3. existing passive balancing technique will cause unnecessary energy loss in balancing procedure, but the utility model
Power battery be not related to other unrelated dissipative cells, there is no extra energy loss in balancing procedure.
4. under discharge mode, which can be according to arbitrary initial state step-up ratio, by all intelligent monomer controls
The output of load terminal voltage is realized in the adjusting of device processed, and user can set the free voltage of load end needs according to actual needs.
Embodiment two:
A kind of electrokinetic cell system, with reference to Fig. 5, which includes the power battery 1 in above-described embodiment one,
Further include: power battery controller 2；
Wherein, power battery controller 2 and power battery 1 communicate to connect, for obtaining preset charged limitation voltage and really
The charge/discharge buck ratio of determined power battery pack 111.
Power battery controller 2 acquires the electrical parameter of all power battery intelligence monomers 11 in power battery 1, and combines
Under the charged state got preset charged limitation voltage and discharge condition under preset power battery pack buck than determining power
The charge/discharge buck ratio of each power battery pack 111 in battery 1, and each charge/discharge buck ratio is sent to pair
The intelligent piece controller 112 answered.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
Specific work process, can be with reference to the corresponding process in previous embodiment one, details are not described herein.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment the method for the utility model whole or portion
Step by step.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of power battery characterized by comprising multiple concatenated power battery intelligence monomers, each power electric
Pond intelligence monomer includes: power battery pack and intelligent piece controller, and the power battery pack and the intelligent monomer control
Device is in parallel；
The intelligence piece controller is used to acquire the electrical parameter of the power battery intelligence monomer, and by the electrical parameter
It is sent to the power battery controller of the power battery pack, so that the power battery controller is true based on the electrical parameter
The charge/discharge buck ratio of the fixed power battery pack, wherein the electrical parameter includes: the voltage of the power battery pack,
The end voltage of the end voltage of the intelligence piece controller, the intelligence piece controller indicates that intelligence described in discharge process is single
The input terminal voltage of intelligence piece controller described in the output end voltage or charging process of body controller；
The intelligence piece controller is also used to receive the charge/discharge buck ratio that the power battery controller is sent,
Energy transfer based on the charge/discharge buck than controlling the power battery pack and external equipment.
2. power battery according to claim 1, which is characterized in that the intelligence piece controller includes: Voltage loop control
Device processed, current loop controller and bidirectional Buck-Boost converter；
The voltage ring controller respectively with the power battery controller, the power battery pack and the current loop controller
Connection, for acquire the power battery pack voltage and the intelligent piece controller end voltage and be sent to the power
Battery controller；
The voltage ring controller is also used to receive the charge/discharge for the power battery pack that the power battery controller is sent
Buck ratio than determining target current and is sent to the current loop controller based on the charge/discharge buck, wherein institute
Target current is stated for making the voltage of the power battery pack of the output voltage in discharge process and the charge/discharge buck
The product of ratio or for making the voltage of the power battery pack in charging process charge limit value voltage, the charging limit value is electric
Pressure is the fixed voltage of setting；
The current loop controller is connect with the bidirectional Buck-Boost converter, for receiving the target current, and acquisition
The output electric current of the bidirectional Buck-Boost converter, and the two-way liter is determined based on the target current and the output electric current
The running parameter of buck converter, wherein the running parameter includes: the duty ratio of impulse wave；
The bidirectional Buck-Boost converter is connect with the power battery pack, controls institute for the duty ratio based on the impulse wave
It states power battery pack and external equipment carries out energy transfer.
3. power battery according to claim 2, which is characterized in that the voltage ring controller include: voltage collector,
Communication module and the first data processor；
The voltage collector is connect with the power battery pack and the communication module respectively, for acquiring the power battery
The end voltage of the voltage of group and the intelligent piece controller, and the power battery is sent to by the communication module and is controlled
Device；
The communication module is also connect with first data processor, the institute sent for receiving the power battery controller
It states the charge/discharge buck ratio of power battery pack, and the charge/discharge buck ratio of the power battery monomer is sent to described
First data processor；
First data processor is for the charge/discharge buck based on the power battery monomer than determining the target electricity
It flows and the current loop controller is sent to by the communication module.
4. power battery according to claim 3, which is characterized in that the current loop controller includes: current collector
With the second data processor；
The current collector respectively with the bidirectional Buck-Boost converter, at the voltage ring controller and second data
Device connection is managed, the institute that the output electric current and the reception voltage ring controller for acquiring the bidirectional Buck-Boost converter are sent
Target current is stated, and the output electric current and the target current are sent to second data processor；
Second data processor determines the bidirectional Buck-Boost converter based on the output electric current and the target current
Running parameter.
5. power battery according to claim 2, which is characterized in that the bidirectional Buck-Boost converter includes: pulse hair
Raw device and voltage control circuit；
The impulse generator is connect with the voltage control circuit, for generating impulse wave based on the duty ratio；
The voltage control circuit is used to control the power battery pack based on the impulse wave and external equipment carries out energy and turns
It moves.
6. power battery according to claim 5, which is characterized in that the voltage control circuit includes: first capacitor, the
One metal-oxide-semiconductor, the second metal-oxide-semiconductor, inductance, third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor and the second capacitor；
The first capacitor and the intelligent input terminal of piece controller are in parallel, the first end of the first capacitor and described the
The source electrode of one metal-oxide-semiconductor connects, and the second end of the first capacitor is connect with the source electrode of second metal-oxide-semiconductor；
The drain electrode of first metal-oxide-semiconductor is connect with the first end of the drain electrode of second metal-oxide-semiconductor and the inductance respectively, the electricity
The second end of sense is connect with the source electrode of the drain electrode of the third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor respectively；
The source electrode of the third metal-oxide-semiconductor source electrode with second metal-oxide-semiconductor respectively, the first end of second capacitor and described dynamic
The cathode of power battery pack connects, the second end of second capacitor respectively with the drain electrode of the 4th metal-oxide-semiconductor and the power electric
The anode connection of pond group；
The grid of first metal-oxide-semiconductor is connect with the first end of the impulse generator, the grid of second metal-oxide-semiconductor with it is described
The second end of impulse generator connects, and the grid of the third metal-oxide-semiconductor is connect with the third end of the impulse generator, and described the
The grid of four metal-oxide-semiconductors is connect with the 4th end of the impulse generator.
7. power battery according to claim 3, which is characterized in that the communication mode of the communication module includes at least:
The communication mode and SPI communication mode of CAN bus.
8. power battery according to claim 2, which is characterized in that the power battery pack includes at least a section power electric
Pond monomer.
9. power battery according to claim 1, which is characterized in that the power battery further include: shell；
The multiple concatenated power battery intelligence monomer is set in the shell.
10. a kind of electrokinetic cell system, which is characterized in that the system comprises according to any one of claims 1 to 9
Power battery, further includes: power battery controller；
Wherein, the power battery controller and the power battery communicate to connect, for obtain preset charged limitation voltage and
Determine the charge/discharge buck ratio of the power battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920024395.7U CN209505504U (en) | 2019-01-07 | 2019-01-07 | Power battery and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920024395.7U CN209505504U (en) | 2019-01-07 | 2019-01-07 | Power battery and system |
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| CN209505504U true CN209505504U (en) | 2019-10-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021088982A1 (en) * | 2019-11-07 | 2021-05-14 | Shanghai Tengtong Information Technology Co., Ltd. | Controller for battery packs |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021088982A1 (en) * | 2019-11-07 | 2021-05-14 | Shanghai Tengtong Information Technology Co., Ltd. | Controller for battery packs |
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