CN103633717A - Charging system of electric car charging station - Google Patents
Charging system of electric car charging station Download PDFInfo
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- CN103633717A CN103633717A CN201210307199.3A CN201210307199A CN103633717A CN 103633717 A CN103633717 A CN 103633717A CN 201210307199 A CN201210307199 A CN 201210307199A CN 103633717 A CN103633717 A CN 103633717A
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Abstract
Provided in the invention is a charging system of an electric car charging station. The charging system comprises a centralized electric energy conversion apparatus, a direct-current bus, a plurality of direct-current conversion charging modules, and a battery box. An alternating-current side of the centralized electric energy conversion apparatus is connected with an alternating-current power supply; a direct-current side of the centralized electric energy conversion apparatus is connected with the direct-current bus; and the centralized electric energy conversion apparatus is used for converting the electric energy of the alternating-current power supply into the direct-current electric energy. The plurality of direct-current conversion charging modules respectively connected with the direct-current bus are used for converting the direct-current electric energy of the direct-current bus into the charging electric energy meeting the battery specification. The battery box connected with one or more direct-current conversion charging modules is used for providing the charging electric energy meeting the battery specification for the battery. According to the invention, the centralized electric energy conversion apparatus is used for completing the high-power rectification function; distribution to the plurality of direct-current conversion charging modules by the direct-current bus is realized; the integration degree is high; and the end equipment is simplified. Therefore, problems low distribution running integration degree and large occupied area in the prior art can be solved.
Description
Technical field
The present invention relates to power domain, in particular to a kind of charging system of electric automobile charging station.
Background technology
Electric automobile, as clean, low-carbon type Green Vehicle, receives the very big concern of countries in the world.Along with the popularization gradually of electric automobile, charging station is as important infrastructure, and it is built increasingly and rises.Yet the theory of the planning and designing aspect of domestic charging station is also unsound, still in demonstration and exploratory stage.The Optimized System Design of charging station plays vital effect to the enforcement of engineering construction, safe and stable operation and economical operation management.
The charging system of the electric automobile charging station that existing use is general is converted into alternating current by AC/DC charger the direct current mating with battery parameter, gives the battery charging of electric automobile.Fig. 1 is according to the charging system of the electric automobile charging station of prior art, as shown in Figure 1, in existing charging system, the AC of AC/DC charger is directly connected with the three phase mains 11 of electrical network, respectively under the control of charging station station end background monitoring system 12, by grid alternating current rectification, be to meet the direct current of battery specification to charge for the battery of electric motor car by battery case 15,12 of charger 14 and charging station station end background monitoring system communicate by letter and undertaken by communication bus 13 wherein, battery case 15 is according to the specification setting of different batteries.
There is following shortcoming in existing this charging system:
1, charging function realizes and exchanges the charge function that is converted to direct current, the bi-directional conversion that can not accomplish battery power and electrical network electric energy;
2, AC/DC charger distributes and moves, and overall operation efficiency is low, and communicating by letter separately with charger in the end backstage of standing, is not easy to optimal control;
3, separate-box type VD grade is low, and output current is large, causes conductor cross-section excessive, has increased wire cost;
4, AC/DC charger volume is larger, arranged apart with battery case, has increased floor space, and particularly, when occurring that the distance of charger and battery case is longer, line drop obviously increases, and charger output performance will be subject to large impact, and line loss increases greatly;
5, a large amount of large wire diameter cable laying workloads is large, expends a large amount of manpower and materials.
In charging system for the electric automobile charging station of prior art, a plurality of AC/DC chargers large problem of the operation low floor space of integrated level that distributes, not yet proposes effective solution at present.
Summary of the invention
The present invention aims to provide a kind of charging system of electric automobile charging station, to solve the large problem of a plurality of AC/DC chargers distribution operation low floor space of integrated level in prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of charging system of electric automobile charging station.The charging system of electric automobile charging station provided by the invention, comprise centralized device for converting electric energy, DC bus, a plurality of DC converting charging module, battery case, wherein, the AC of above-mentioned centralized device for converting electric energy is connected with AC power, the DC side of centralized device for converting electric energy is connected with DC bus, and this centralized device for converting electric energy is for being converted to direct current energy by the electric energy of AC power; Above-mentioned a plurality of DC converting charging module, is connected with DC bus respectively, for the direct current energy on DC bus being converted to the rechargeable electrical energy that meets battery specification; Above-mentioned battery case, is connected with one or more DC converting charging modules, for the rechargeable electrical energy that meets battery specification is offered to battery.
Further, above-mentioned DC converting charging module, also for being provided to DC bus by the electric energy of battery storage; Centralized device for converting electric energy is also for the direct current energy of DC bus is converted to AC energy, and to AC power feedback communication electric energy.
Further, above-mentioned centralized device for converting electric energy comprises the electric energy conversion module of a plurality of mutual parallel connections.
Further, the charging system of electric automobile charging station provided by the invention also comprises: load dispatch administrative unit, be connected with a plurality of DC converting charging modules with centralized device for converting electric energy respectively, for receiving the operating state data of centralized device for converting electric energy and a plurality of DC converting charging modules, and send control command to centralized device for converting electric energy and a plurality of DC converting charging module.
Further, the charging system of electric automobile charging station provided by the invention also comprises: AC power distribution cabinet/AC distribution panel, is connected between AC power and centralized device for converting electric energy.
Further, the charging system of electric automobile charging station provided by the invention also comprises: transformer, is connected between AC power and AC power distribution cabinet/AC distribution panel, for being to meet the voltage that centralized device for converting electric energy AC requires by the voltage transformation of AC power.
Further, the charging system of electric automobile charging station provided by the invention also comprises: new forms of energy access device, is connected with DC bus, for the electric energy from photovoltaic cell is provided to DC bus.
Further, the specified charging voltage of a plurality of DC converting charging modules is different, is connected respectively respectively with the battery case of corresponding voltage.
Further, a plurality of DC converting charging modules and battery case centralized arrangement are in integrated charging cabinet.
Further, the rated voltage of the DC side of centralized device for converting electric energy is more than or equal to 800V.
Apply technical scheme of the present invention, centralized device for converting electric energy is concentrated the electric energy of electrical network to be converted to high-tension direct current energy and to offer DC bus, by DC bus, distribute to a plurality of DC converting charging modules, by DC converting charging module, be converted to the rechargeable electrical energy that meets battery request.Utilize centralized device for converting electric energy to complete powerful rectification function, integrated level is high, has simplified end-equipment, thereby solved in prior art, distributes and moves the large problem of the low floor space of integrated level.
Accompanying drawing explanation
The Figure of description that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the charging system of the electric automobile charging station of prior art;
Fig. 2 is according to the schematic diagram of the charging system of the electric automobile charging station of the embodiment of the present invention;
Fig. 3 is the schematic diagram of integrated charging cabinet of charging system of the electric automobile charging station of the embodiment of the present invention;
Fig. 4 is a kind of embodiment of optimal way of charging system of the electric automobile charging station of the embodiment of the present invention.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The embodiment of the present invention provides a kind of charging system of electric automobile charging station, Fig. 2 is according to the schematic diagram of the charging system of the electric automobile charging station of the embodiment of the present invention, as shown in Figure 2, the charging system of this electric automobile charging station comprises: centralized device for converting electric energy 23, DC bus 22, a plurality of DC converting charging modules 21, battery case 15, wherein, the AC of centralized device for converting electric energy 23 is connected with AC power 11, the DC side of centralized device for converting electric energy 23 is connected with DC bus 22, centralized device for converting electric energy 23 is for being converted to direct current energy by the electric energy of AC power 11, a plurality of DC converting charging modules 21, are connected with DC bus 22 respectively, for the direct current energy on DC bus 22 being converted to the rechargeable electrical energy that meets battery specification, battery case 15, is connected with one or more DC converting charging modules 21, for the rechargeable electrical energy that meets battery specification is offered to battery.
Existing electrical network can be used as AC power 11, centralized device for converting electric energy 23 is concentrated the electric energy of electrical network to be converted to high-tension direct current energy and to offer DC bus 22, by DC bus 22, distribute to a plurality of DC converting charging modules 21, by DC converting charging module 21, be converted to the rechargeable electrical energy that meets battery request.Utilize centralized device for converting electric energy 23 to complete powerful rectification function, integrated level is high, has simplified end-equipment, thereby solved in prior art, distributes and moves the large problem of the low floor space of integrated level.
Preferably, above-mentioned DC converting charging module 21, can also be for being provided to DC bus 22 by the electric energy of battery storage; Centralized device for converting electric energy 23 is also for the direct current energy of DC bus 22 is converted to AC energy, and to AC power 11 feedback communication electric energy.Now, battery is as energy storage battery, DC converting charging module 21 is realized low pressure to the copped wave function of high pressure, centralized device for converting electric energy 23 is realized direct current to the invert function exchanging, thereby formed an energy-storage system, can realize the bi-directional conversion of power grid energy and battery power, reach the object of peak load shifting emergency service.
Centralized device for converting electric energy 23 can comprise the electric energy conversion module of a plurality of mutual parallel connections, thereby adopts according to demand unit parallel operation, and the mode of operation of N+1 backup has improved the functional reliability of centralized device for converting electric energy 23.
The charging system of the electric automobile charging station of the embodiment of the present invention, can also comprise: load dispatch administrative unit, be connected with a plurality of DC converting charging modules 21 with centralized device for converting electric energy 23 respectively, for receiving the operating state data of centralized device for converting electric energy 23 and a plurality of DC converting charging modules 21, and send control command to centralized device for converting electric energy 23 and a plurality of DC converting charging module 21.Load dispatch administrative unit, as the control centre of whole charging system, is controlled the mode of operation of centralized device for converting electric energy 23 and DC converting charging module 21 according to actual needs, and the power of conversion is regulated.
Preferably, between AC power 11 and centralized device for converting electric energy 23, AC power distribution cabinet/AC distribution panel can also be set, thereby can carry out centralized arrangement to exchanging wiring.Between this external AC power 11 and AC power distribution cabinet/AC distribution panel, can also be provided with transformer, be to meet the voltage that centralized device for converting electric energy 23 ACs require by the voltage transformation of AC power.At the charging system of electric automobile charging station during in energy storage pattern, the voltage that transformer is AC power by the voltage transitions of centralized device for converting electric energy 23 ACs.
The charging system of some electric automobile charging station is also provided with photovoltaic system at present, for supplementing of electrical network electric energy, in this case, photovoltaic system need to be transported on electrical network by inverter, by electrical network, supply with battery again, this mode has caused the meaningless circulation of electric energy.The charging system of the electric automobile charging station of the embodiment of the present invention can also comprise new forms of energy access device, is connected, for the electric energy from photovoltaic cell is provided to DC bus with DC bus.Photovoltaic cell is directly connected on DC bus, realizes the conveying of energy, has simplified the access of photovoltaic system, has avoided the waste of photovoltaic electric energy.
The rated voltage of different batteries is different, as a plurality of electric pressures such as 40V, 80V, 100V, 120V, 150V, 600V, according to the electric pressure of battery and power stage, therefore the charging system of the embodiment of the present invention can arrange many group DC converting charging modules, and the specified charging voltage of a plurality of DC converting charging modules in every group is different.One group of DC converting charging module is connected respectively with the battery case of corresponding voltage respectively.While specifically arranging, can use the corresponding battery case of DC converting charging module of and a plurality of same Voltage-outputs.
Because the volume of DC converting charging module is significantly less than existing AC/DC charging module, preferably, a plurality of battery cases and a plurality of DC converting charging module can concentrate in integrated charging cabinet, Fig. 3 is the schematic diagram of integrated charging cabinet of charging system of the electric automobile charging station of the embodiment of the present invention, as shown in Figure 3, a plurality of DC converting charging modules 21 are arranged on bottom of cabinet bulk, a plurality of battery cases overlay charging module top successively, and this arrangement reduces the volume of charger greatly.
In order to reduce the line loss of direct current energy, the rated voltage of the DC side of centralized device for converting electric energy can be set to be more than or equal to 800V.
Below a kind of specific embodiment mode of the charging system of the electric automobile charging station of the embodiment of the present invention is described.Fig. 4 is a kind of embodiment of optimal way of charging system of the electric automobile charging station of the embodiment of the present invention, as shown in Figure 4, the charging system of electric automobile charging station comprises: centralized device for converting electric energy, DC bus, a plurality of DC converting charging module, battery case, load dispatch administrative unit, AC power distribution cabinet/AC distribution panel, transformer, new forms of energy access device.
The charging system of the electric automobile charging station of this optimal way has retained the advantage that conventional electric automobile fills electrical changing station charging system monitoring mode, proposes DC bus as charging system (CDS-DPbus) mode of power bus pattern.Be distribution system and high power DC equipment group centralized configuration, by direct current power bus, unified the direct current of output HIGH voltage grade, for each charger, share.
Centralized device for converting electric energy, high power digital DC power source unit, DC monitoring system, insulating monitoring etc., consist of, every unit DC power output voltage grade is more than or equal to 800V, power 200kW, adopt according to demand unit parallel operation, the mode of operation of N+1 backup.Unification is transported to power bus by direct current.
DC bus is the power cell that electric energy is concentrated output, and rated voltage is more than or equal to DC800V, matches with the DC voltage grade of centralized device for converting electric energy.The power request of the output-controlled load dispatch administrative unit in each DC converting charging module of energy of power bus.Realize the centralized and unified conveying of direct current energy.
DC converting charging module adopts DC/DC pattern, power bus DC800V is converted to the different electric pressures of the required use of battery, as anyly in DC40V, DC80V, DC100V, DC120V, DC150V, DC600V etc. meets battery required voltage grade and power stage.DC/DC replaces original AC/DC, and the volume of charger is reduced greatly.For separate-box type charging system, realize charger and battery carrier is integrated, integrated charging cabinet becomes possibility.The outdoor charger DC/DC design of car load formula of different electric pressures is also simplified, and volume will reduce thereupon, and power supply more economically, reasonable.
The new forms of energy access device of the charging system of the electric automobile charging station of this optimal way is due to the application of direct current power bus, simpler.Photovoltaic cell only need pass through header box, DC lightning prevention cabinet directly accesses direct current power bus through reasonable disposition and conversion, just can realize the conveying of energy.
Load dispatch administrative unit, on the basis of existing charging station station end background monitoring system, increases following function: the one, and the function of the distributed DC/DC power request of diversification; The 2nd, high power DC machine set system output integrated is controlled function; The 3rd, energy-storage system rational management function.
This design fully merges the comprehensive utilization of charging electric vehicle and new forms of energy and intelligent grid technology, realizes the economic optimization utilization of the energy, embodies environmental protection theory, meets the industrial policies such as national low-carbon economy, energy-saving and emission-reduction.The use of electric energy is the scheduling of need-based Optimum Synthesis; For charging system, simplified end-equipment; Owing to having adopted high voltage DC busses, the wire diameter of transmission pressure is reduced greatly; Unified power bus, distributed DC/DC configuration is more flexible; Equipment volume reduces, and integrated level improves, and floor space reduces greatly; Project cost will reduce greatly; Can realize the two-way interaction of energy between electric automobile and electrical network, for the development of intelligent grid lays a good foundation; For the access of new forms of energy provides flexibly, interface easily.
Apply technical scheme of the present invention, centralized device for converting electric energy is concentrated the electric energy of electrical network to be converted to high-tension direct current energy and to offer DC bus, by DC bus, distribute to a plurality of DC converting charging modules, by DC converting charging module, be converted to the rechargeable electrical energy that meets battery request.Utilize centralized device for converting electric energy to complete powerful rectification function, integrated level is high, has simplified end-equipment, thereby solved in prior art, distributes and moves the large problem of the low floor space of integrated level.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a charging system for electric automobile charging station, is characterized in that, comprises centralized device for converting electric energy, DC bus, a plurality of DC converting charging module, battery case, wherein,
The AC of described centralized device for converting electric energy is connected with AC power, and the DC side of described centralized device for converting electric energy is connected with described DC bus, and described centralized device for converting electric energy is for being converted to direct current energy by the electric energy of described AC power;
Described a plurality of DC converting charging module, is connected with described DC bus respectively, for the direct current energy on DC bus being converted to the rechargeable electrical energy that meets battery specification;
Described battery case, is connected with one or more described DC converting charging modules, for the described rechargeable electrical energy that meets battery specification is offered to battery.
2. the charging system of electric automobile charging station according to claim 1, is characterized in that,
Described DC converting charging module, also for being provided to described DC bus by the electric energy of battery storage;
Described centralized device for converting electric energy is also for the direct current energy of described DC bus is converted to AC energy, and feeds back described AC energy to AC power.
3. the charging system of electric automobile charging station according to claim 1, is characterized in that, described centralized device for converting electric energy comprises the electric energy conversion module of a plurality of mutual parallel connections.
4. the charging system of electric automobile charging station according to claim 1, it is characterized in that, also comprise: load dispatch administrative unit, be connected with described a plurality of DC converting charging modules with described centralized device for converting electric energy respectively, for receiving the operating state data of described centralized device for converting electric energy and described a plurality of DC converting charging modules, and send control command to described centralized device for converting electric energy and described a plurality of DC converting charging module.
5. the charging system of electric automobile charging station according to claim 1, is characterized in that, also comprises: AC power distribution cabinet/AC distribution panel, is connected between described AC power and described centralized device for converting electric energy.
6. the charging system of electric automobile charging station according to claim 5, it is characterized in that, also comprise: transformer, be connected between described AC power and described AC power distribution cabinet/AC distribution panel, for being to meet the voltage that described centralized device for converting electric energy AC requires by the voltage transformation of AC power.
7. the charging system of electric automobile charging station according to claim 1, is characterized in that, also comprises: new forms of energy access device, is connected with described DC bus, for providing the electric energy from photovoltaic cell to described DC bus.
8. the charging system of electric automobile charging station according to claim 1, is characterized in that, the specified charging voltage of described a plurality of DC converting charging modules is different, is connected respectively respectively with the battery case of corresponding voltage.
9. the charging system of electric automobile charging station according to claim 8, is characterized in that, described a plurality of DC converting charging modules and battery case centralized arrangement are in integrated charging cabinet.
10. the charging system of electric automobile charging station according to claim 1, is characterized in that, the rated voltage of the DC side of described centralized device for converting electric energy is more than or equal to 800V.
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| CN103997097A (en) * | 2014-06-04 | 2014-08-20 | 东莞中山大学研究院 | Electric minibus charging booth |
| CN104079052A (en) * | 2014-07-04 | 2014-10-01 | 国家电网公司 | Direct-current charging system of electric automobile |
| CN104092272A (en) * | 2014-07-24 | 2014-10-08 | 四川慧盈科技有限责任公司 | Optimal configuration method of electric automobile charging system and power distribution network |
| CN104201746A (en) * | 2014-09-16 | 2014-12-10 | 湖南华大紫光科技股份有限公司 | Green energy-saving highway electric vehicle charging station |
| CN104269912A (en) * | 2014-06-27 | 2015-01-07 | 许继电气股份有限公司 | Energy management system for multi-interface DC quick charger |
| CN104852444A (en) * | 2015-05-05 | 2015-08-19 | 深圳晶福源科技股份有限公司 | DC charging device for electric automobiles |
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| CN104079052A (en) * | 2014-07-04 | 2014-10-01 | 国家电网公司 | Direct-current charging system of electric automobile |
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| CN104201746A (en) * | 2014-09-16 | 2014-12-10 | 湖南华大紫光科技股份有限公司 | Green energy-saving highway electric vehicle charging station |
| CN104201746B (en) * | 2014-09-16 | 2017-03-22 | 国家电网公司 | Green energy-saving highway electric vehicle charging station |
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| CN105226752A (en) * | 2015-10-10 | 2016-01-06 | 愈先梅 | Electric automobile direct-current charging post system |
| CN105186650A (en) * | 2015-10-10 | 2015-12-23 | 愈先梅 | Direct current charging pile system for electric automobile |
| CN105244945A (en) * | 2015-10-10 | 2016-01-13 | 愈先梅 | DC charging pole system of electromobile |
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Application publication date: 20140312 |