CN108001246A - A kind of electric automobile DC charging system and its charge control method - Google Patents

A kind of electric automobile DC charging system and its charge control method Download PDF

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Publication number
CN108001246A
CN108001246A CN201610938933.4A CN201610938933A CN108001246A CN 108001246 A CN108001246 A CN 108001246A CN 201610938933 A CN201610938933 A CN 201610938933A CN 108001246 A CN108001246 A CN 108001246A
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CN
China
Prior art keywords
charging
charging module
current
module
adjustable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610938933.4A
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Chinese (zh)
Inventor
胡大满
张瑞丰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Yutong Bus Co Ltd
Original Assignee
Zhengzhou Yutong Bus Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengzhou Yutong Bus Co Ltd filed Critical Zhengzhou Yutong Bus Co Ltd
Priority to CN201610938933.4A priority Critical patent/CN108001246A/en
Publication of CN108001246A publication Critical patent/CN108001246A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30Constructional details of charging stations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/14Plug-in electric vehicles

Abstract

A kind of electric automobile DC charging system and its charge control method provided by the present invention, one of charging module in charging system is arranged to the adjustable adjustable charging module of output current, remaining is respectively provided with as the nonadjustable specified charging module of output current.When being charged for vehicle to be charged, the adjusting to charging gun charging current can be achieved by the quantity for the specified charging module for controlling charging gun connection and the output current of adjustable charging module, control logic is fairly simple, and its actual continuous tuning range is smaller, will not cause larger error.

Description

A kind of electric automobile DC charging system and its charge control method
Technical field
The present invention relates to electric automobile charging technique field, and in particular to a kind of electric automobile DC charging system and its fills Electric control method.
Background technology
At present, the energy of conventional fuel oil automobile is relied primarily in oil, and the tail gas of oil shortage and fuel emission is to ring Cause seriously to pollute so that the mankind more and more urgently work out new green traffic instrument in border.As green traffic instrument, electricity Not only energy-saving effect is notable for electrical automobile, and comprehensive utilization of energy rate increases substantially, and tail gas zero-emission, and environmental benefit is obvious, Therefore the use of electric automobile is more and more extensive.
The power of electric automobile comes from power battery, and the charging rate of power battery is slow, course continuation mileage is short always Restrict the key factor that electric automobile is promoted on a large scale.In view of power battery energy density develops slowly, it is quick using high current Charging can promote the key condition of electric automobile as the current generation.But since the current capacity of charging gun line is by own hardware The restriction of condition, causes single rifle charging to have been unable to meet the trend of high current quick charge.
Many producers realize high current quick charge, and the charge control side used using multiple gun charge mode at present Method is each charging gun average output current to meet that BMS asks current value, such as, when using two charging guns as power battery When being charged, if power battery request electric current is 500A, two charging guns export the electric current of 250A respectively.
Although this control method can meet high current quick charge, charging gun line loss consumption can be caused too fast, made Into the increase of cost, when being charged than two charging guns are used as described above for same power battery, it is assumed that every charging gun Maximum current capacity be 250A, if electric current needed for power battery charging is 500A, two charging guns need to export respectively The electric current of 250A;When electric current needed for power battery charging in charging process is according to present battery parameter (SOC, battery temperature, monomer Voltage when) become turn to 200A when, then need two charging guns to export the electric current of 100A respectively, and only need a charging gun defeated at this time Power battery demand can be met by going out, and without being exported at the same time using two charging guns again, cause excessive loss.
The output current of charging gun be by charger inside charging module provide, and each charging module is maximum defeated Output capacity is identical, and such as each charging module maximum output current is 20A, then when charging gun needs to export the charging current of 250A When, it is necessary to 13 charging modules, wherein 12 charging modules are provided which the electric current of 20A, another charging module provides the electricity of 10A Stream.At present, charging module all inside charger is that output is adjustable, and each charging module described above can export 0 and arrive The electric current of 20A, so not only control logic is complicated, and influence charging module stablizes output, and easily causes charging gun output electricity Stream precision is low, and error is larger.
The content of the invention
The present invention provides a kind of electric automobile DC charging system and its charge control method, to solve above-mentioned charging When control logic it is complicated the problem of.
A kind of charge control method of electric automobile DC charging system, it is characterised in that include the following steps:
(1) BMS with vehicle to be charged carries out information exchange, obtains the charging current B needed for vehicle to be charged;
(2) the specified charging module that quantity is adapted with charging current B is chosen;The specified charging module of the selection and institute State adjustable charging module and provide the electric current that electric current total value is B together for charging gun, be Vehicular charging to be charged.
The charge control method of a kind of electric automobile DC charging system provided by the present invention, by its in charging system In a charging module be arranged to the adjustable adjustable charging module of output current, remaining is respectively provided with non-adjustable as output current Specified charging module.When being charged for vehicle to be charged, the number of the specified charging module by controlling charging gun connection Amount and the output current of adjustable charging module are the adjusting that can be achieved to charging gun output current, and control logic is fairly simple, and And its actual continuous tuning range is smaller, current precision is higher, will not cause larger output error.
Further, if the output-current rating of the maximum output current of adjustable charging module and each specified charging module Be L, then the specified charging module quantity n chosen according to formula n × L≤B < (n+1) × L, the electricity of adjustable charging module output Flow valuve is B-n × L.
According to the method described above, it can quickly calculate the required specified charging module quantity of charging and adjustable charging module is defeated Go out current value.
A kind of electric automobile DC charging system, including charging gun and charging module, the charging module are used for for charging Rifle provides electric current;Wherein charging module includes the adjustable adjustable charging module of an output current and at least one output current not Adjustable specified charging module.
Further, the maximum output current of the adjustable charging module and the specified electricity of each specified charging module output Flow equal.
Further, the DC charging system includes at least two charging guns, and each charging gun shares a dc bus; The output terminal of each charging module and the input terminal of each charging gun by switching connection dc bus accordingly.
Further, the DC charging system includes at least two charging guns;It is every that charging gun is equipped with accordingly directly Busbar is flowed, each charging module is connected the dc bus of charging gun with every by switching accordingly.
Brief description of the drawings
Fig. 1 is the structure diagram of electric automobile DC charging system in system embodiment 1;
Fig. 2 is the structure diagram of electric automobile DC charging system in system embodiment 2;
Fig. 3 is electric automobile DC charging system charge control flow chart.
Embodiment
The present invention provides a kind of electric automobile DC charging system and its charge control method, to solve above-mentioned charging When control logic it is complicated and the problem of output current value error is larger.
A kind of charge control method of electric automobile DC charging system, includes the following steps:
(1) off-board charger is obtained needed for vehicle to be charged when carrying out information exchange with the BMS of vehicle to be charged Charging current B;
(2) the specified charging module that quantity is adapted with charging current B is chosen;The specified charging module of the selection and institute State adjustable charging module and provide the electric current that electric current total value is B together for charging gun, be Vehicular charging to be charged.
The charge control method of a kind of electric automobile DC charging system provided by the present invention, by its in charging system In a charging module be arranged to the adjustable adjustable charging module of output current, remaining is respectively provided with non-adjustable as output current Specified charging module.When being charged for vehicle to be charged, the number of the specified charging module by controlling charging gun connection Amount and the output current of adjustable charging module are the adjusting that can be achieved to charging gun output current, and control logic is fairly simple, and And its actual continuous tuning range is smaller, current precision is higher, will not cause larger output error.
The present invention is described in detail below in conjunction with the accompanying drawings.
System embodiment 1:
A kind of electric automobile DC charging system that the present embodiment is provided is as shown in Figure 1, including charging gun 1, charging gun 2nd, charging gun 3 ... charging gun y etc. is how more charging gun, charging module 1, charging module 2, charging module 3 ... charging module x A nonadjustable specified charging module of output, further includes dc bus and the adjustable adjustable charging module of output current.It is adjustable to fill The output terminal of electric module and each specified charging module, and the input terminal of each charging gun are connected with dc bus;In charging gun 1 The circuit for connecting dc bus is equipped with switch K21, is connected in charging gun 2 and switch K22 ... is equipped with the circuit of dc bus Switch K2y etc. is equipped with the circuit of charging gun y connection dc bus.The rated current that each specified charging module is capable of providing It is worth for L, the maximum current value that adjustable charging module is capable of providing also is L.
As other embodiment, the maximum current that adjustable charging module is capable of providing can be set greater than to the value of L.
In the electric automobile DC charging system structure diagram that the present embodiment is provided, i.e. in Fig. 1, dc bus and each Charging module, the circuit of charging gun connection dc bus are two lines road, in the present embodiment in order to simplify circuit, are conveniently looked into See, be denoted as a circuit.
System embodiment 2:
A kind of electric automobile DC charging system that the present embodiment is provided is as shown in Fig. 2, including charging gun 1, charging gun 2nd, charging gun 3 ... charging gun y etc. is how more charging gun, charging module 1, charging module 2, charging module 3 ... charging module x A nonadjustable specified charging module of output, it is every that the input terminal of charging gun is respectively connected with corresponding dc bus;Further include out Matrix and the adjustable adjustable charging module of output current are closed, the output terminal of each charging module is connected each charging gun by switch matrix Input terminal.The load current value that each specified charging module is capable of providing is L, the maximum current that adjustable charging module is capable of providing Value is also L.
The maximum current that adjustable charging module is capable of providing, can be set greater than the value of L by other embodiment the most.
In the electric automobile DC charging system structure diagram that the present embodiment is provided, i.e. in Fig. 2, each charging gun it is straight It is two lines road that stream busbar, which connects the circuit of charging gun dc bus with each charging module, in the present embodiment in order to simplify line Road, is conveniently checked, is denoted as a circuit.
Embodiment of the method 1
A kind of charging of the electric automobile DC charging system provided suitable for system embodiment 1 is be provided Control method, flow chart is as shown in figure 3, specific method is as follows:
(1) charging gun is connected to the charging interface of vehicle to be charged, establishes off-board charger and vehicle BMS's to be charged Communication connection, while connect the charging gun connection dc bus of vehicle to be charged;
(2) off-board charger is obtained needed for vehicle to be charged when carrying out information exchange with the BMS of vehicle to be charged Charging current B;
(3) according to formula n × L≤B < (n+1) × L, n specified charging modules are chosen, and control the n specified chargings Module exports rated current to dc bus;Switch K0 is closed at the same time, the electric current that adjustable charging module exports is arranged to B-n ×L。
In the present embodiment, the specified charging module number according to needed for formula n × L≤B < (n+1) × L calculates charging The output current of amount and adjustable charging module;As other embodiment, other methods can be used to draw the volume needed for charging Determine charging module quantity and the output current of adjustable charging module, such as use formula B ÷ L, the quotient and the remainder of the formula are respectively The output current of specified charging module quantity and adjustable charging module needed for charging.
Embodiment of the method 2
A kind of charging of the electric automobile DC charging system provided suitable for system embodiment 1 is be provided Control method, specific method are as follows:
(1) charging gun is connected to the charging interface of vehicle to be charged, foundation is connected with the communication of vehicle BMS to be charged;
(2) off-board charger is obtained needed for vehicle to be charged when carrying out information exchange with the BMS of vehicle to be charged Charging current B;
(3) according to formula n × L≤B < (n+1) × L, n specified charging modules are chosen, control corresponding switch closure, This n specified charging modules and adjustable charging module are connected on the charging gun being connected with vehicle to be charged together, will be adjustable Charging module is also connected on charging gun, and the electric current of output is arranged to B-n × L.
In the present embodiment, the specified charging module number according to needed for formula n × L≤B < (n+1) × L calculates charging The output current of amount and adjustable charging module;As other embodiment, other methods can be used to draw the volume needed for charging Determine charging module quantity and the output current of adjustable charging module, such as use formula B ÷ L, the quotient and the remainder of the formula are respectively The output current of specified charging module quantity and adjustable charging module needed for charging.
Embodiment of the present invention is presented above, but the present invention is not limited to described embodiment. Under the thinking that provides of the present invention, using by the way of being readily apparent that to those skilled in the art to the skill in above-described embodiment Art means are converted, replaced, changed, and play the role of with the present invention in relevant art means it is essentially identical, realize Goal of the invention it is also essentially identical, the technical solution so formed is finely adjusted above-described embodiment to be formed, this technology Scheme is still fallen within protection scope of the present invention.

Claims (6)

1. a kind of charge control method of electric automobile DC charging system, it is characterised in that include the following steps:
(1) BMS with vehicle to be charged carries out information exchange, obtains the charging current B needed for vehicle to be charged;
(2) the specified charging module that quantity is adapted with charging current B is chosen;The specified charging module of the selection with it is described can Adjust charging module to provide the electric current that electric current total value is B together for charging gun, be Vehicular charging to be charged.
2. the charge control method of a kind of electric automobile DC charging system according to claim 1, it is characterised in that set The maximum output current of adjustable charging module and the output-current rating of each specified charging module are L, then according to formula n × The specified charging module quantity n that L≤B < (n+1) × L chooses, the electric current of adjustable charging module output is B-n × L.
3. a kind of electric automobile DC charging system, it is characterised in that including charging gun and charging module, the charging module is used In providing electric current for charging gun;Wherein charging module includes the adjustable adjustable charging module of an output current and at least one defeated Go out the nonadjustable specified charging module of electric current.
A kind of 4. electric automobile DC charging system according to claim 3, it is characterised in that the adjustable charging module Maximum output current it is equal with the rated current of each specified charging module output.
A kind of 5. electric automobile DC charging system according to claim 3, it is characterised in that the DC charging system Including at least two charging guns, each charging gun shares a dc bus;The output terminal and each charging gun of each charging module Input terminal by switching connection dc bus accordingly.
A kind of 6. electric automobile DC charging system according to claim 3, it is characterised in that the DC charging system Including at least two charging guns;Every that charging gun is equipped with corresponding dc bus, each charging module by opening accordingly Pass is connected the dc bus of charging gun with every.
CN201610938933.4A 2016-11-01 2016-11-01 A kind of electric automobile DC charging system and its charge control method Pending CN108001246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610938933.4A CN108001246A (en) 2016-11-01 2016-11-01 A kind of electric automobile DC charging system and its charge control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610938933.4A CN108001246A (en) 2016-11-01 2016-11-01 A kind of electric automobile DC charging system and its charge control method

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Publication Number Publication Date
CN108001246A true CN108001246A (en) 2018-05-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109159675A (en) * 2018-09-13 2019-01-08 厦门科华恒盛股份有限公司 A kind of matrix form flexibility charging system, charge control method and device
CN110556902A (en) * 2019-09-20 2019-12-10 阳光电源股份有限公司 Charging method and direct current charging system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109159675A (en) * 2018-09-13 2019-01-08 厦门科华恒盛股份有限公司 A kind of matrix form flexibility charging system, charge control method and device
CN109159675B (en) * 2018-09-13 2020-02-21 科华恒盛股份有限公司 Matrix type flexible charging system, charging control method and device
CN110556902A (en) * 2019-09-20 2019-12-10 阳光电源股份有限公司 Charging method and direct current charging system
CN110556902B (en) * 2019-09-20 2021-09-03 阳光电源股份有限公司 Charging method and direct current charging system

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