CN106494247A - A kind of pure electric vehicle entire car controller charging current computational methods - Google Patents

A kind of pure electric vehicle entire car controller charging current computational methods Download PDF

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Publication number
CN106494247A
CN106494247A CN201610908679.3A CN201610908679A CN106494247A CN 106494247 A CN106494247 A CN 106494247A CN 201610908679 A CN201610908679 A CN 201610908679A CN 106494247 A CN106494247 A CN 106494247A
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China
Prior art keywords
electric current
current
charging
computational methods
car controller
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CN201610908679.3A
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Chinese (zh)
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CN106494247B (en
Inventor
姜立标
黄树程
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South China University of Technology SCUT
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South China University of Technology SCUT
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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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a kind of pure electric vehicle entire car controller charging current computational methods, are charged to electric motor car based on invariable power charging modes, including step：(1) electrokinetic cell internal resistance R, the outside charge power P, outside of providing are tried to achieve according to the equivalent circuit in charging process and charging voltage V is provided；(2) the variable quantity △ I of electric current are obtained by recursive algorithm；(3) the variable quantity △ I of electric current are added the electric current of output charge requirement with the value before electric current recursion.The present invention can be such that charging pile is charged electric motor car according to the charging current for calculating acquisition, in order to ensure the safety that charges, need to give the charging current for finally calculating one factor of safety, make charging process safe and reliable, rapidly and efficiently.

Description

A kind of pure electric vehicle entire car controller charging current computational methods
Technical field
The present invention devises a kind of computational methods of new electric motor car charging current, specifically employs and is calculated by invariable power The method of electric current.
Background technology
At present, world energy sources crisis aggravation, for alleviating energy crisis and successfully manages climate change, and countries in the world are confused Confused appearance measure taps a new source of energy.Used as a kind of vehicles, automobile is huge for the consumption of traditional energy.Pure electric vehicle As the succedaneum of orthodox car, due to its energy-conservation and the characteristic of environmental protection, more and more paid attention to.The Chinese government In order to promote the fast development of electric motor car, enterprise is encouraged to be researched and developed accordingly energetically.In recent years, domestic electric motor car industry was obtained Huge progress.
Content of the invention
The present invention provides a kind of effective computational methods for electric motor car charging current, can be efficiently and safely complete Charge requirement into electric motor car.
The present invention is achieved through the following technical solutions：
A kind of pure electric vehicle entire car controller charging current computational methods, are carried out to electric motor car based on invariable power charging modes Charge, including step：
(1) try to achieve electrokinetic cell internal resistance R, the outside charge power P, outside of providing according to the equivalent circuit in charging process to carry For charging voltage V；
(2) the variable quantity △ I of electric current are obtained by recursive algorithm；
(3) the variable quantity △ I of electric current are added the electric current of output charge requirement with the value before electric current recursion.
Further, step (2) specifically include：
(21) electric current at n moment is set as In, voltage is Vn, the electric current at n+1 moment is In+1, voltage is Vn+1, according to Kiel suddenly Husband's law has：
P=In+1*Vn+1,
Have again：
In+1=In+ △ I,
Vn+1=Vn+ △ V,
Then have：
P=(In+△I)*(Vn+ △ V),
Expansion has：
P=In*Vn+△I*Vn+△V*In+ △ I* △ V,
Wherein △ I are current change quantity, and △ V are voltage variety；
(22) when the step-length acquirement for calculating is sufficiently small, have
△ I* △ V=0,
Then：
P=In*Vn+△I*Vn+△V*In,
Have again：
△ V=△ I*R,
Therefore：
P=In*Vn+△I*(Vn+In* R),
So：
△ I=(P-In*Vn)/(Vn+In*R).
Further, described step (3) are specially：
I(n+1)=In+ △ I=In+(P-In*(E+In*R))/((E+In*R)+InR).
Further, also include step before be added the variable quantity of electric current with the value before electric current recursion： The variable quantity of electric current is taken advantage of in factor of safety, to guarantee the safety that charges.
Further, described factor of safety is 0.8, i.e. the electric current of output charge requirement is：
I(n+1)=In+0.8*(P-In*(E+In*R))/((E+In*R)+InR).
Compared to existing technology, the present invention can be such that charging pile is charged electric motor car according to the charging current for calculating acquisition, Make charging process safe and reliable, rapidly and efficiently.
Description of the drawings
Fig. 1 is charging process equivalent circuit diagram.
Specific embodiment
The goal of the invention of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, embodiment is not Energy here is repeated one by one, but therefore embodiments of the present invention are not defined in following examples.
The electric motor car is charged to electric motor car using invariable power charging modes.Equivalent circuit in charging process such as Fig. 1 Shown.
In Fig. 1, E is electrokinetic cell electromotive force, and R is electrokinetic cell internal resistance, and P provides charge power for outside, and V is carried for outside For charging voltage, I is circuital current.
Had by Kirchhoff's law：
V=E+I*R,
P=V*I,
If the electric current at n moment is In, voltage is Vn, (n+1) electric current at moment is In+1, voltage is Vn+1.P is the permanent work(that charges Rate, R are the internal resistance of cell.
As charging modes charge for invariable power, then have
P=In+1*Vn+1,
Have again：
In+1=In+ △ I,
Vn+1=Vn+ △ V,
Then have：
P=(In+△I)*(Vn+ △ V),
Expansion has：
P=In*Vn+△I*Vn+△V*In+ △ I* △ V,
When calculate step-length obtain sufficiently small when, ignore current change quantity is multiplied with voltage variety generation less change Amount, has：
△ I* △ V=0,
Then：
P=In*Vn+△I*Vn+△V*In,
Have again：
△ V=△ I*R,
Therefore：
P=In*Vn+△I*(Vn+In* R),
So：
△ I=(P-In*Vn)/(Vn+In* R),
Again：
Vn=E+In* R,
Therefore：
I(n+1)=In+ △ I=In+(P-In*(E+In*R))/((E+In*R)+InR),
In order to ensure the safety that charges, the variable quantity of electric current is taken advantage of in factor of safety 0.8, then above formula is finally
I(n+1)=In+0.8*(P-In*(E+In*R))/((E+In*R)+InR).
In the present embodiment, electric motor car is charged to electric motor car using invariable power charging modes, and algorithm model can pass through MATLAB/Simulink is modeled.The core library module that the model is related to is Delay (time delay), realizes galvanometer by which Calculate the recursive algorithm in formula.Model needs the data of collection to include electrokinetic cell internal resistance R (by acquisition of tabling look-up), allow charging work( The electromotive force E (charging circuit open-circuit voltage) of rate and electrokinetic cell.Charging pile is by the charging current obtained according to calculating to electricity Motor-car is charged.In order to ensure the safety that charges, need to give the charging current for finally calculating one factor of safety.
The variable quantity for electric current for calculating, its value are taken advantage of after factor of safety 0.8, are added with the value before electric current recursion The electric current of output charge requirement.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention Embodiment restriction.For those of ordinary skill in the field, can also make on the basis of the above description The change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.All the present invention Any modification, equivalent and improvement that is made within spirit and principle etc., should be included in the protection of the claims in the present invention Within the scope of.

Claims (5)

1. a kind of pure electric vehicle entire car controller charging current computational methods, are filled to electric motor car based on invariable power charging modes Electricity, it is characterised in that including step：
(1) try to achieve electrokinetic cell internal resistance R, the outside charge power P, outside offer of providing according to the equivalent circuit in charging process to fill Piezoelectric voltage V；
(2) the variable quantity △ I of electric current are obtained by recursive algorithm；
(3) the variable quantity △ I of electric current are added the electric current of output charge requirement with the value before electric current recursion.
2. pure electric vehicle entire car controller charging current computational methods according to claim 1, it is characterised in that the step Suddenly (2) specifically include：
(21) electric current at n moment is set as In, voltage is Vn, the electric current at n+1 moment is In+1, voltage is Vn+1, fixed according to kirchhoff Rule has：
P=In+1*Vn+1,
Have again：
In+1=In+ △ I,
Vn+1=Vn+ △ V,
Then have：
P=(In+△I)*(Vn+ △ V),
Expansion has：
P=In*Vn+△I*Vn+△V*In+ △ I* △ V,
Wherein △ I are current change quantity, and △ V are voltage variety；
(22) when the step-length acquirement for calculating is sufficiently small, have
△ I* △ V=0,
Then：
P=In*Vn+△I*Vn+△V*In,
Have again：
△ V=△ I*R,
Therefore：
P=In*Vn+△I*(Vn+In* R),
So：
△ I=(P-In*Vn)/(Vn+In*R).
3. pure electric vehicle entire car controller charging current computational methods according to claim 2, it is characterised in that：The step Suddenly (3) are specially：
I(n+1)=In+ △ I=In+(P-In*(E+In*R))/((E+In*R)+InR).
4. pure electric vehicle entire car controller charging current computational methods according to claim 3, it is characterised in that：The step Suddenly also include step before be added the variable quantity of electric current with the value before electric current recursion：The variable quantity of electric current is taken advantage of in safety The factor.
5. pure electric vehicle entire car controller charging current computational methods according to claim 4, it is characterised in that：Described Factor of safety is 0.8, i.e. the electric current of output charge requirement is：
I(n+1)=In+0.8*(P-In*(E+In*R))/((E+In*R)+InR).
CN201610908679.3A 2016-10-18 2016-10-18 A kind of pure electric vehicle entire car controller charging current calculation method Expired - Fee Related CN106494247B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112946478A (en) * 2019-12-11 2021-06-11 北京车和家信息技术有限公司 Method for determining real-time available power of battery and related equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200947552Y (en) * 2006-07-24 2007-09-12 北方工业大学 Intelligent charging/discharging system of dynamic battery for electric vehicle
CN102904309A (en) * 2012-10-19 2013-01-30 惠州Tcl移动通信有限公司 Mobile equipment, as well as method and system for realizing constant-power-state mobile charging of mobile equipment
CN103954917A (en) * 2014-05-22 2014-07-30 山东大学 Cell test simulation device and implementation method
CN105015360A (en) * 2015-06-24 2015-11-04 安徽江淮汽车股份有限公司 SOF monitoring method of vehicle power battery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200947552Y (en) * 2006-07-24 2007-09-12 北方工业大学 Intelligent charging/discharging system of dynamic battery for electric vehicle
CN102904309A (en) * 2012-10-19 2013-01-30 惠州Tcl移动通信有限公司 Mobile equipment, as well as method and system for realizing constant-power-state mobile charging of mobile equipment
CN103954917A (en) * 2014-05-22 2014-07-30 山东大学 Cell test simulation device and implementation method
CN105015360A (en) * 2015-06-24 2015-11-04 安徽江淮汽车股份有限公司 SOF monitoring method of vehicle power battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112946478A (en) * 2019-12-11 2021-06-11 北京车和家信息技术有限公司 Method for determining real-time available power of battery and related equipment

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