CN104065148A - Electric vehicle charging system and charging method - Google Patents

Electric vehicle charging system and charging method Download PDF

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Publication number
CN104065148A
CN104065148A CN201410323966.9A CN201410323966A CN104065148A CN 104065148 A CN104065148 A CN 104065148A CN 201410323966 A CN201410323966 A CN 201410323966A CN 104065148 A CN104065148 A CN 104065148A
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China
Prior art keywords
charging
switch
module
bus
electric automobile
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CN201410323966.9A
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CN104065148B (en
Inventor
吕有根
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SHENZHEN INCREASE TECHNOLOGY DEVELOPMENT Co Ltd
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SHENZHEN INCREASE TECHNOLOGY DEVELOPMENT Co Ltd
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    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses an electric vehicle charging system and charging method. The electric vehicle charging system comprises a communication module, an on-off control module and a plurality of switch modules, wherein the on-off control module is electrically connected with the switch modules; at least two sets of direct current buses are provided; charging modules can be connected to the two sets of direct current buses through the switch modules; direct current output power distribution switches are in fit with the direct current buses in number; one end of the communication module is electrically connected with the direct current output power distribution switches; the other end of the communication module is electrically connected with the on-off control module. Multiple electric vehicles can be charged at the same time through the charging modules with the minimum number, so that the charging modules with full loads are fully utilized for working, the utilization rate of the charging modules is improved, the charging efficiency is high, and investment of the system is lowered.

Description

Charging system for electric automobile and charging method thereof
Technical field
The present invention relates to a kind of charging system of automobile, relate in particular to a kind of charging system for electric automobile and charging method thereof.
Background technology
Along with the in short supply and air-polluting aggravation of fossil energy, need badly and can expect that to fossil the automobile of type improves, thus, taking storage battery as automobile, the electric automobile of power supply arises at the historic moment.Traditional charging system for electric automobile is generally divided into integrated charger, or split type charger, be characterized in comprising a charger and charging pile, can only connect a batteries of electric automobile and BMS (battery management system (BATTERYMANAGEMENT SYSTEM)), realize to a charging electric vehicle, a machine one fills, as shown in Figure 1.
As shown in Figure 2, conventional electric automobile one machine one fills and has following features: comprise and exchange total input panel switches QF1, AC measurment multifunctional meter, AC/DC charging module M1~M10, module exchanges input switch Q1~Q10, charging module output DC bus L+/L-, direct current output metering multifunctional meter, direct current output distribution switch QF2.Exchange after the connection of total input panel switches, the civil power of charger changes into direct current and arrives DC distribution output switch to charging electric vehicle through DC bus L+/L-through AC/DC charging module.But, inventor finds that in long-term experiment the feature of charge in batteries needs large current charge while being beginning, after progressive being full of, only need little electric current, and the low current charge time is longer than the large current charge time, in the charge mode that an above-mentioned like this machine one rushes there is the problem that utilance is low, charge efficiency is low in charger; And in the time needing many automobiles of charging, need multiple chargers, cost is high.For this reason, be necessary the charging system of above-mentioned electric automobile to improve.
Summary of the invention
Technical problem to be solved by this invention is: provide that a kind of charging module utilance is high, charge efficiency is high, and can realize the charging system for electric automobile of a charger to many charging electric vehicles.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of charging system for electric automobile is provided, comprise and exchange total input panel switches, DC bus, direct current output distribution switch and multiple charging module, also comprise communication module, switch control module and multiple switch module, described switch control module is electrically connected with multiple switch modules respectively; The quantity of described DC bus is at least two groups, and described charging module can be accessed by two groups of DC buss by switch module; Described direct current goes out the quantity of panel switches and the quantity adaptation of DC bus; Described communication module one end is connected with cell management system of electric automobile to be charged, and the other end is electrically connected with switch control module;
Described communication module, for the charging quantity of the electric automobile after gathering and charging data are converted to control information and are sent to switch control module, wherein, described charging data are the required charging current of each electric automobile and charging voltage;
Described switch module, for on/off charging module and charging bus;
Described switch control module, for according to the sub-switch of switch module corresponding to the charging data on/off of each electric automobile, making on DC bus and connecing the two or more charging modules that adapt with described charging data is charging electric vehicle.
In order to solve the problems of the technologies described above, another technical solution used in the present invention is: a kind of charging method of charging system for electric automobile is provided, comprises step:
S01, distribute two or more electric motor cars charging end;
S02, detect charging end electric automobile charging quantity and gather the charging data of each electric automobile, wherein, charging voltage and charging current that described charging data are electric automobile;
S03, charging data are sent to switch control module;
S04, connect/switch corresponding charging module according to the charging data of each electric automobile, making on DC bus and connecing the two or more charging modules that adapt with described charging data is charging electric vehicle.
Beneficial effect of the present invention is: charging system for electric automobile of the present invention adopts charging module is accessed by switch module on two groups or more DC bus, and configuration one switch control module, this switch control module can be according to the quantity of electric automobile and charging data turn on-switch module, and be equipped with communication module at DC output end, the data of the electric automobile of collection and charging data thereof can be delivered to switch control module, pass through switch module, switch control module, communication module and two groups or more DC bus, can realize two or more charging electric vehicles.The charging module that the present invention can realize configuration minimum number charges to many electric automobiles simultaneously, operates at full capacity to make full use of charging module, improves the utilance of charging module, and charge efficiency is high, is conducive to reduce the investment of system.
Brief description of the drawings
Fig. 1 is charging system for electric automobile connection layout of the prior art;
Fig. 2 is the circuit diagram of charging system of electric powercar in Fig. 1;
Fig. 3 is charging system of electric powercar connection layout of the present invention;
Fig. 4 is the circuit diagram of charging system of electric powercar in Fig. 3;
Fig. 5 is the charging method flow chart of charging system of electric powercar of the present invention;
Fig. 6 is the switching schematic diagram of charging module M;
Fig. 7 is the sequential chart of voltage, electric current and K switch 1 and the K2 of the switching front and back of charging module M.
Label declaration:
QF1-exchanges always input panel switches, 11-AC measurment multifunctional meter, 12-the first DC bus, 13-the second DC bus, 14-direct current output metering multifunctional meter, QF2-direct current output distribution switch, 15-charging module, 16-and exchanges input switch, 17-switch control module, 18-switch module.
Embodiment
By describing technology contents of the present invention, structural feature in detail, being realized object and effect, below in conjunction with execution mode and coordinate accompanying drawing to be explained in detail.
The design of most critical of the present invention is: the present invention adopts communication module that the charging data of electric automobile are delivered to switch control module, and connect charging module and DC bus by switch control module control switch module, the machine of can realizing fills more, and charging module utilance is high, charge efficiency is high.
Refer to Fig. 3 and Fig. 4, refer to Fig. 3 and Fig. 4, a kind of charging system for electric automobile, comprise and exchange total input panel switches QF1, DC bus, direct current output distribution switch QF2 and multiple charging module 15, also comprise communication module, switch control module 17 and multiple switch module 18, described switch control module 17 is electrically connected with multiple switch modules 18 respectively; The quantity of described DC bus is at least two groups, and described charging module 15 is by the accessible two groups of DC buss of switch module 18; Described direct current goes out the quantity of panel switches and the quantity adaptation of DC bus; Described communication module one end is connected with cell management system of electric automobile to be charged, and the other end is electrically connected with switch control module 17;
Described communication module, for the charging quantity of the electric automobile after gathering and charging data are converted to control information and are sent to switch control module 17, wherein, described charging data are the required charging current of each electric automobile and charging voltage;
Described switch module 18, for on/off charging module 15 and charging bus;
Described switch control module 17, be used for according to the sub-switch of switch module 18 corresponding to the charging data on/off of each electric automobile, making on DC bus and connecing the two or more charging modules 15 that adapt with described charging data is charging electric vehicle.
Above-mentioned direct current output distribution switch QF2 can be arranged on charging pile, on charging pile, can pass through lead external charging gun.
From foregoing description, beneficial effect of the present invention is: charging system for electric automobile of the present invention adopts charging module 15 is accessed by switch module 18 on two groups or more DC bus, and configuration one switch control module 17, this switch control module 17 can be according to the quantity of electric automobile and charging data turn on-switch module 18, and be equipped with communication module at DC output end, the data of the electric automobile of collection and charging data thereof can be delivered to switch control module 17, by switch module 18, switch control module 17, communication module and two groups or more DC bus, can realize two or more charging electric vehicles.The present invention can realize the charging module 15 of charger configuration minimum number, realizes many electric automobiles and charges simultaneously, operates at full capacity to make full use of charging module 15.
Further, also comprise isolation module, one end of described isolation module is connected with charging module 15, and the other end of isolation module is electrically connected with switch module 18.The concrete device of this isolation module is diode, and the anode of diode connects charging module 15, the negative terminal connecting valve module 18 of diode, and in the time that charging module 15 switches, diode can play the effect of isolation electric current, extends the life-span of switch.
Further, described DC bus comprises the first DC bus 12 and the second DC bus 13, described the first DC bus 12 and the second DC bus 13 include DC bus L+ and DC bus L-, described switch module 18 comprises the first sub-switch, the second sub-switch, the 3rd sub-switch and the 4th sub-switch, two outputs of described charging module 15 are respectively by the first sub-switch and the corresponding DC bus L+ and DC bus L-that accesses the first DC bus 12 of the second sub-switch, two outputs of described charging module 15 are also respectively by the 3rd sub-switch and the corresponding DC bus L+ and DC bus L-that accesses the second DC bus 13 of the 4th sub-switch.
Further, described the first sub-switch, the second sub-switch, the 3rd sub-switch and the 4th sub-switch are in killer switch, relay switch, Mosfet switch or IGBT switch any one.
Further, also comprise the direct current output metering multifunctional meter 14 being electrically connected with DC bus, the described direct current output metering quantity of multifunctional meter 14 and the quantity of direct current output distribution switch QF2 are suitable.Also comprise AC measurment multifunctional meter 11 and exchange input switch 16.
In sum, charging system for electric automobile provided by the invention, adopt charging module is accessed by switch module on two groups or more DC bus, and configuration one switch control module, this switch control module can be according to corresponding sub-switch in the quantity of electric automobile and charging data turn on-switch module, and be equipped with communication module at DC output end, the data of the electric automobile of collection and charging data thereof can be delivered to switch control module, pass through switch module, switch control module, communication module and two groups or more DC bus, can realize two or more charging electric vehicles.In addition, the sub-switch in switch module can be controlled the quantity of charging module access DC bus, and the type of this sub-switch is conventional electronic switch; The charging module that the present invention can realize configuration minimum number charges to many electric automobiles simultaneously, operates at full capacity to make full use of charging module, improves the utilance of charging module, and charge efficiency is high, is conducive to reduce the investment of system.
Consult Fig. 5, a kind of charging method of charging system for electric automobile, comprises step:
S01, distribute two or more electric motor cars charging end;
S02, detect charging end electric automobile charging quantity and gather the charging data of each electric automobile, wherein, charging voltage and charging current that described charging data are electric automobile;
S03, charging data are sent to switch control module;
S04, connect/switch corresponding charging module according to the charging data of each electric automobile, making on DC bus and connecing the two or more charging modules that adapt with described charging data is charging electric vehicle.
The charging of single electric automobile only need be connected the charging module corresponding with the data of charging, and can relate to the switching problem of charging module to two or more charging electric vehicles.
Further, the step of switching charging module in described step S04 comprises:
S41, turn down the DC bus-bar voltage to be switched charging module place;
S42, judge whether the DC bus-bar voltage to be switched charging module place is greater than the size of DC bus-bar voltage to be charged, if not, performs step S43, if so, performs step S41;
S43, disconnect being connected of to be switched charging module and DC bus;
S44, by band switch charging module access on DC bus to be charged.
The zero current that can realize two switches by above-mentioned steps disconnects, and zero-voltage zero-current adhesive takes over seamlessly.
Further, after described step S04, also comprise step S05, add up the charge capacity of each electric automobile.To charged electrical quantitative statistics, conveniently carry out charging according to charge capacity.
In sum, the charging method of charging system for electric automobile provided by the invention, adopt in charging end the charging quantity to electric automobile and charging data gather, charging data are resolved to the sub-switch of switch module corresponding to rear connection, making on DC bus and connecing the two or more charging modules that adapt with described charging data is charging electric vehicle, can show many electric automobiles charges simultaneously, so that making full use of charging module operates at full capacity, improve the utilance of charging module, charge efficiency is high, is conducive to reduce the investment of system.In addition, also comprise the step that statistics charging is lighted, be convenient to charging.
Consult Fig. 6 and Fig. 7, in a concrete example, suppose that machine two charging systems output DC buss one are parallel with 1~M M module parallel operation altogether, export DC bus two and are parallel with the individual module parallel operation of M1~N common (N-M); First need dynamically to switch charging module M by DC bus Vbus1 to DC bus Vbus2;
Step1: the voltage of turning down charging module M DC bus Vbus1;
Step2: wait for that its voltage VR is reduced to and is less than or equal to Vbus2 by Vbus1;
Step3: disconnect K1 switch, the connection that makes charging module M depart from bus Vbus1, owing to there being the isolation of output diode, the zero current of realizing K switch 1 disconnects, and improves its useful life;
Step4: adhesive K2 switch, make charging module M be parallel to the connection work of DC bus Vbus2, owing to there being the isolation of output diode, realize no-voltage, the zero current adhesive of K switch 2, improve its useful life.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (8)

1. a charging system for electric automobile, comprise and exchange total input panel switches, DC bus, direct current output distribution switch and multiple charging module, it is characterized in that, also comprise communication module, switch control module and multiple switch module, described switch control module is electrically connected with multiple switch modules respectively; The quantity of described DC bus is at least two groups, and described charging module can be accessed by two groups of DC buss by switch module; Described direct current goes out the quantity of panel switches and the quantity adaptation of DC bus; Described communication module one end is connected with cell management system of electric automobile to be charged, and the other end is electrically connected with switch control module;
Described communication module, for the charging quantity of the electric automobile after gathering and charging data are converted to control information and are sent to switch control module, wherein, described charging data are the required charging current of each electric automobile and charging voltage;
Described switch module, for on/off charging module and charging bus;
Described switch control module, for according to the sub-switch of switch module corresponding to the charging data on/off of each electric automobile, making on DC bus and connecing the two or more charging modules that adapt with described charging data is charging electric vehicle.
2. charging system for electric automobile according to claim 1, is characterized in that, also comprises isolation module, and one end of described isolation module is connected with charging module, and the other end of isolation module is electrically connected with switch module.
3. charging system for electric automobile according to claim 1, it is characterized in that, described DC bus comprises the first DC bus and the second DC bus, described the first DC bus and the second DC bus include DC bus L+ and DC bus L-, described switch module comprises the first sub-switch, the second sub-switch, the 3rd sub-switch and the 4th sub-switch, two outputs of described charging module are respectively by the first sub-switch and the corresponding DC bus L+ and DC bus L-that accesses the first DC bus of the second sub-switch, two outputs of described charging module are also respectively by the 3rd sub-switch and the corresponding DC bus L+ and DC bus L-that accesses the second DC bus of the 4th sub-switch.
4. charging system for electric automobile according to claim 2, is characterized in that, described the first sub-switch, the second sub-switch, the 3rd sub-switch and the 4th sub-switch are in killer switch, relay switch, Mosfet switch or IGBT switch any one.
5. charging system for electric automobile according to claim 1, is characterized in that, also comprises the direct current output metering multifunctional meter being electrically connected with DC bus, and the described direct current output metering quantity of multifunctional meter and the quantity of direct current output distribution switch are suitable.
6. a charging method for charging system for electric automobile, is characterized in that, comprises step:
S01, distribute two or more electric motor cars charging end;
S02, detect charging end electric automobile charging quantity and gather the charging data of each electric automobile, wherein, charging voltage and charging current that described charging data are electric automobile;
S03, charging data are sent to switch control module;
S04, connect/switch corresponding charging module according to the charging data of each electric automobile, making on DC bus and connecing the two or more charging modules that adapt with described charging data is charging electric vehicle.
7. the charging method of charging system for electric automobile according to claim 6, is characterized in that, the step of switching charging module in described step S04 comprises:
S41, turn down the DC bus-bar voltage to be switched charging module place;
S42, judge whether the DC bus-bar voltage to be switched charging module place is greater than the size of DC bus-bar voltage to be charged, if not, performs step S43, if so, performs step S41;
S43, disconnect being connected of to be switched charging module and DC bus;
S44, by band switch charging module access on DC bus to be charged.
8. the charging method of charging system for electric automobile according to claim 6, is characterized in that, after described step S04, also comprises step S05, adds up the charge capacity of each electric automobile.
CN201410323966.9A 2014-07-08 2014-07-08 Electric vehicle charging system and charging method Active CN104065148B (en)

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Cited By (8)

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CN104734119A (en) * 2015-02-26 2015-06-24 张家港市华为电子有限公司 Self-protection method of battery charger system when parallel operation charging is realized through CAN communication
CN104795877A (en) * 2015-05-08 2015-07-22 山东鲁能智能技术有限公司 Electric automobile integrated direct-current charger, system and method
CN105207302A (en) * 2015-10-19 2015-12-30 西安特锐德智能充电科技有限公司 Flexible charging method and charger of electric car
CN106585412A (en) * 2016-12-22 2017-04-26 深圳市沃特玛电池有限公司 Charging system and method
CN106856341A (en) * 2016-12-26 2017-06-16 浙江万马新能源有限公司 A kind of charging electric vehicle control method of low equipment loss
CN106904089A (en) * 2017-03-16 2017-06-30 深圳英飞源技术有限公司 A kind of charging system for electric automobile of use dc loop circuit
WO2018040994A1 (en) * 2016-08-29 2018-03-08 上海蔚来汽车有限公司 Modularised charging vehicle
CN108001246A (en) * 2016-11-01 2018-05-08 郑州宇通客车股份有限公司 A kind of electric automobile DC charging system and its charge control method

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CN104734119A (en) * 2015-02-26 2015-06-24 张家港市华为电子有限公司 Self-protection method of battery charger system when parallel operation charging is realized through CAN communication
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CN106856341A (en) * 2016-12-26 2017-06-16 浙江万马新能源有限公司 A kind of charging electric vehicle control method of low equipment loss
CN106904089A (en) * 2017-03-16 2017-06-30 深圳英飞源技术有限公司 A kind of charging system for electric automobile of use dc loop circuit

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