CN210309959U - Distributed charging system based on direct current bus - Google Patents
Distributed charging system based on direct current bus Download PDFInfo
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- CN210309959U CN210309959U CN201921208796.4U CN201921208796U CN210309959U CN 210309959 U CN210309959 U CN 210309959U CN 201921208796 U CN201921208796 U CN 201921208796U CN 210309959 U CN210309959 U CN 210309959U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
- Y02T90/14—Plug-in electric vehicles
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Abstract
The utility model relates to the technical field of power supply charging, in particular to a collecting and distributing type charging system based on a direct current bus, which comprises a multi-pulse wave rectifying circuit electrically connected with a high-voltage power grid, wherein the output end of the multi-pulse wave rectifying circuit is connected with the direct current bus, and also comprises a plurality of charging piles, at least one DC/DC charging module is arranged in each charging pile, the input sides of the charging piles are electrically connected with the direct current bus, the output sides of the charging piles are electrically connected with at least one charging gun and/or at least one charging gun cabinet, and the direct current transmission between power distribution equipment and the charging piles is realized through the direct current bus, so that when the scale of the charging system needs to be enlarged, only two shorter cables are needed to connect newly-built charging piles and the direct current bus, when the number of covered parking spaces of a single charging pile needs to be enlarged, will fill electric pile and set up one way or multiplexed output and be connected to the rifle cabinet that charges, form a system that can constantly promote the ability of charging, scalability is high.
Description
Technical Field
The utility model relates to a power technical field that charges, in particular to collection formula charging system that looses based on direct current generating line.
Background
Along with electric automobile's rapid development, the demand to filling electric pile also increases day by day, and it is more and more common to set up the circumstances of filling electric pile or setting up dedicated charging station in the parking area, and large-scale parking area or charging station often need the dispersion to install tens of and even hundreds of electric piles, along with the operational aspect, still need the unscheduled adjustment to fill electric pile quantity to satisfy the demand of charging of increasing electric automobile.
As shown in fig. 1 and fig. 2, two charging systems of the existing parking lot or charging station, in fig. 1, the existing distributed charging system based on the AC bus, which is used for collecting power from a high-voltage cable of a national power grid, reducing the voltage through a transformer, converting the power into three-phase 380V AC power, and supplying power to each charging pile with an AC/DC charging module through the AC bus; FIG. 2 shows a conventional centralized power distribution charging system, in which a common AC/DC charging module converts 380V AC power into DC power, and the DC power is distributed to each charging post via a common conventional power distribution device, wherein in the first charging system, 380V AC power is input into each charging post, the voltage is low, three power distribution cables are required to be used for electrical connection between each charging module and a transformer, and under the condition of ensuring power transmission, the current flowing through the power distribution cables is large, so that the sectional area of the power distribution cables is large, the power consumption is high, the cost is high, the size of the charging posts is large, the manufacturing cost is high, the initial construction cost of the charging system is increased, and in the second charging system, each charging gun needs to correspond to one path of DC power distribution cables, so that more power distribution cables are arranged between the charging module and a plurality of charging posts, the system is complex, the failure rate is high, the initial construction cost and the later maintenance cost of the charging system are increased, meanwhile, in order to carry out harmonic treatment, the related safety standard is met, the requirement of a national power grid on the equipment power factor is met, the reactive power loss is reduced, a power factor correction circuit and a filter circuit are required to be arranged in the two charging systems, the further manufacturing cost of the charging pile is high, the size is large, and when the number of the charging piles is required to be increased, a long power distribution cable is required to be laid independently, so that the expansibility of the existing charging system is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the defects in the conventional power supply charging system, the distributed charging system based on the direct current bus is low in construction cost, good in expansibility and high in reliability.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a distributed charging system based on direct current bus, includes the many pulse wave rectification return circuits with high-voltage electric network electrical connection, the output in many pulse wave rectification return circuits is connected with direct current bus, still includes a plurality of electric pile of filling, it is provided with at least one DC/DC module of charging to fill in the electric pile, the input side electrical connection that fills electric pile is in on the direct current bus, output side electrical connection at least one rifle and/or at least one rifle cabinet that charges.
The utility model discloses a collecting and distributing type charging system based on direct current bus, through adopting the multiple pulse wave rectification return circuit as the distribution equipment, realize the direct current transmission between distribution equipment and the charging pile, supply energy for a plurality of charging piles that disperse in parking area through the direct current bus, make under the condition that the capacity of the multiple pulse wave transformer that constitutes the multiple pulse wave rectification return circuit and fairing thereof is sufficient, when needing to enlarge the charging system scale, increase the charging pile quantity, only need two shorter cables to connect the newly-built charging pile with the direct current bus, form a system that can constantly promote the charging ability, scale upgrade is very convenient, make the charging system of this structure constantly promote the scale of charging station with lower economic investment on the basis of the original system, expandability is higher, simultaneously, when the number of covering parking stalls of a single charging pile needs to be enlarged, the charging gun cabinet is only required to be arranged at a parking place nearby a single charging pile, one or more paths of outputs of the charging pile are arranged and connected to the charging gun cabinet, electric energy sent by the charging pile is distributed to a plurality of charging guns in the charging gun cabinet, and one or more electric vehicles can be charged by the single charging gun cabinet The size and the occupied area of the charging system are reduced, and the overall construction cost of the charging system is reduced.
Preferably, a power distribution device is arranged in the charging pile, the power distribution device is arranged between the charging module and the charging gun, and the power distribution device is used for configuring the output power of the charging gun. Because can set up a plurality of modules that charge according to actual conditions in every fills electric pile, connect N rifle that charges, make the accessible set up the power distribution device in filling electric pile, realize the power distribution of rifle that charges in filling electric pile, reduce the distribution cable between module and the rifle that charges, reduce the power distribution degree of difficulty of single electric pile that fills, realize charging a plurality of electric motor cars of electric pile periphery, charging system structure is simplified, make things convenient for charging system's construction, charging system's reliability and utilization ratio have been improved, the contradiction between the initial investment height and the low utilization ratio of equipment of filling electric pile has been solved well.
Preferably, the power distribution device comprises a main control unit and a plurality of switch devices, wherein the main control unit adjusts the on-off state of the switch devices to change the electrical connection relationship between the charging module and the charging gun. The output of every module that charges passes through switching device and links to each other with a plurality of output cables, the output cable is connected with the rifle one-to-one that charges, through the state that opens and shuts of controlling a plurality of switching devices, can be relatively easy make a plurality of modules that charge connect in parallel together, the main control unit is according to the DC charging power proportion that each electric motor car expects to obtain, opens or closes switching device realizes the connection of each module that charges and arbitrary a rifle that charges to the output of nimble regulation rifle that charges realizes the dynamic allotment of rifle power that charges.
Preferably, the rifle cabinet that charges includes the cabinet body and sets up a plurality of rifle that charge that the cabinet is internal, the rifle cabinet that charges with fill electric pile's at least output electrical connection all the way. Because do not include the module of charging in the rifle cabinet that charges for single rifle cabinet volume of charging is less, take up an area of less, can be more convenient lay near the parking stall, easier under the condition that does not increase system power, reach the purpose of charging to more electric motor cars, further improve this charging system's scalability, when the parking stall that single stake of charging covered is further enlarged to needs, it can expand to a plurality of rifle cabinets of charging nearby to fill electric pile, when needs further promote system scale, single rifle cabinet of charging also can be upgraded as required and fill electric pile and direct current bus directly links to each other, further improve this charging system's scalability.
Preferably, a wheel charging distribution device is arranged in the charging gun cabinet, the input side of the wheel charging distribution device is electrically connected with at least one path of output of the charging pile, and the wheel fully-distribution device is used for configuring the charging sequence of the charging guns in the charging gun cabinet. When the input way number of the charging gun cabinet is less than or more than the number of charging guns in the charging gun cabinet, the wheel charging distribution device is arranged in the charging gun cabinet, the charging sequence of the charging guns in the charging gun cabinet is configured, so that when a plurality of charging guns are arranged in the charging gun cabinet, the charging guns are used for alternately charging electric vehicles, the charging of more electric vehicles is realized under the condition that the system power is not increased, and the expandability of the charging system is further improved.
Preferably, charging management devices are respectively arranged in the charging pile and the charging gun cabinet and are in communication connection with the power distribution device or the wheel fully-matching device. The charging management device comprises a functional device which is required to be equipped for normal use of the charging pile in a conventional manner, such as an electric energy acquisition circuit, an intelligent electric meter, a temperature control protection device, an electric energy detection device and a display screen, so that the user's power demand and power consumption are acquired through the charging management device, the best distribution basis is provided for power distribution of each charging pile or charging gun cabinet, the practicability and the utilization rate of the charging system are improved, and the normal work of the charging pile is completed.
Preferably, the charging module includes at least one DC/DC conversion unit, and when the number of the conversion units is two or more, the input terminals of the conversion units are connected in series or in parallel, and the output terminals are connected in parallel. The quantity of the conversion units can be adjusted according to actual conditions, the output power of a single charging module is adjusted, the utilization rate of the charging system is further improved conveniently under the condition that the total power of the system is not increased, meanwhile, the conversion units are arranged in the mode, compared with the existing charging system, the direct-current bus voltage is higher and the line loss is smaller under the condition that the same power is transmitted, cables with smaller sectional areas can be adopted, and the overall construction cost of the charging system is further reduced.
Preferably, when the number of the charging modules in a single charging pile is two or more, the input ends of the charging modules are connected in series, and the output ends of the charging modules are connected in parallel. Through set up a plurality of modules that charge in single electric pile of filling for can adjust single output who fills electric pile according to the actual conditions who fills electric pile, further conveniently improve this charging system's utilization ratio.
Preferably, a voltage detection device is electrically connected to the dc bus, and the voltage detection device is connected to the charge management device in a communication manner. Through setting up voltage detection device real-time detection direct current bus voltage, when grid voltage changes and surpasss the allowed range, in time through the disconnection that the charging management device realized direct current bus power supply, close each and fill electric pile, stop to the electric motor car charge, guarantee charging system's safe handling.
Preferably, the charging gun cabinet comprises a quick charging area and a general charging area, and the charging gun cabinet is arranged in the general charging area. Through will follow direct current bus and lay a plurality of electric piles that the route was arranged and is set up and charge the rifle cabinet according to the district setting of distinguishing of filling soon with ordinary according to the district, only set up the electric pile that fills who does not connect the rifle cabinet that charges in the district soon, the user charges and need charge according to the charging order of wheel charge distributor configuration, make the user can select the rifle that charges in the great electric pile that fills of exportable power to carry out the charging that does not wait in the district of filling soon according to actual conditions, or, select the rifle that charges in the rifle cabinet that charges that needs the waiting in the district of filling ordinary to charge, realize the cooperation of charging process and user's actual conditions, improve the utilization ratio, the economic nature and the practicality of the interior stake of charging of this charging system.
To sum up, owing to adopted above-mentioned technical scheme, the utility model discloses a collecting and distributing formula charging system based on direct current generating line's beneficial effect is:
1. the multi-pulse rectification loop is used as the power distribution equipment, so that direct current transmission between the power distribution equipment and the charging pile is realized, the number of cables between the power distribution equipment and the charging pile can be reduced to a direct current bus consisting of two direct current cables, and the overall construction cost of a charging system is reduced;
2. under the condition that the capacity of a multi-pulse-wave transformer and a rectifying device of the multi-pulse-wave transformer forming a multi-pulse-wave rectifying loop is sufficient, when the scale of a charging system needs to be enlarged and the number of charging piles needs to be increased, only two short cables are needed to connect a newly-built charging pile with a direct-current bus to form a system capable of continuously improving the charging capacity, the scale is very convenient and fast to upgrade, the charging system with the structure can continuously improve the scale of a charging station with low economic investment on the basis of the original system, and the expandability is high;
3. when the number of covered parking spaces of a single charging pile needs to be enlarged, only a charging gun cabinet needs to be arranged at a parking space near the single charging pile, one or more paths of outputs of the charging pile are arranged and connected to the charging gun cabinet, electric energy sent by the charging pile is distributed to a plurality of charging guns in the charging gun cabinet, and the single charging gun cabinet is used for charging one or more electric vehicles;
4. the number of the charging modules in a single charging pile and the number of the charging guns and/or the charging gun cabinets connected with the single charging pile can be adjusted according to actual conditions, flexible power allocation of the charging guns is realized in the charging piles, the structure of the charging system is simplified, the reliability of the charging system is improved, and the expansibility of the charging system with the structure is further improved;
5. because the output electric energy quality of the multi-pulse rectification circuit is higher, a preceding stage filter circuit and a power factor correction circuit in the charging module can be reduced or omitted, the cost, the volume and the occupied area of a single charging pile are further reduced in terms of hardware, and the overall construction cost of the charging system is reduced;
the beneficial effects of other implementation modes of the distributed charging system based on the direct current bus of the embodiment are as follows:
through will follow direct current generating line and lay a plurality of electric piles that the route was arranged and is set up and the rifle cabinet that charges according to the district setting of distinguishing with ordinary charging of filling soon along the direct current generating line for the user can be according to actual conditions, select the rifle that charges in the great electric pile that fills of exportable power in the district that fills soon to carry out the charging that does not wait for, perhaps, select the rifle that charges in the rifle cabinet that charges that needs the waiting in ordinary charging district to charge, realize the cooperation of charging process and user's actual conditions, improve the utilization ratio of the interior electric pile that charges of this charging system, economy and practicality.
Drawings
Fig. 1 is a prior art ac bus based decentralized charging system;
fig. 2 is a prior art centralized power distribution charging system;
fig. 3 is a schematic structural diagram of a distributed charging system based on a dc bus according to the present invention;
FIG. 4 is a schematic diagram of a multi-pulse rectification circuit;
fig. 5 is an implementation effect diagram of a distributed charging system based on a dc bus in embodiment 1;
fig. 6 is a diagram illustrating another effect of the distributed charging system based on the dc bus in embodiment 1;
fig. 7 is a schematic structural view of the charging pile in embodiment 2;
fig. 8 is a schematic structural diagram of the power distribution apparatus described in embodiment 2;
fig. 9 is a schematic structural diagram of the charging pile according to embodiment 3;
fig. 10 is a schematic structural view of the charging gun cabinet according to embodiment 4;
fig. 11 is an effect diagram of an implementation of the distributed charging system based on the dc bus in embodiment 4.
Reference numerals
The method comprises the following steps of 1-a high-voltage power grid, 2-a multi-pulse wave rectifying circuit, 21-a 24-pulse wave rectifying circuit, 22-a rectifying bridge, 3-a direct current bus, 4-a charging pile, 5-a charging module, 51-a conversion unit, 6-a charging gun, 7-a power distribution device, 71-a main control unit, 72-a switching device, 8-a charging gun cabinet, 81-a wheel fully-matching device, 9-a charging management device, 10-a voltage detection device, 20-a quick charging area and 30-a general charging area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in fig. 3-6, a distributed charging system based on a DC bus includes a multi-pulse wave rectification loop 2 electrically connected to a high-voltage power grid 1, an output end of the multi-pulse wave rectification loop 2 is connected to a DC bus 3, the DC bus 3 is electrically connected to a plurality of charging piles 4, each charging pile 4 is provided with N DC/DC charging modules 5 therein, an input side of each charging module 5 is electrically connected to the DC bus 3, and an output side is electrically connected to a charging gun 6.
A collection formula charging system that looses based on direct current bus of this embodiment, preferably many pulse wave rectifier circuit 2 include electric connection's 24 pulse wave transformer 21 and rectifier bridge 22, 24 pulse wave transformer 21 adopts Y/delta to add the triangle-shaped structure of extending, 24 pulse wave rectifier transformer 21's input lug connection is on 10 kV's high voltage electric network 1, and rectifier bridge 22's output is connected on direct current bus 3, and direct current bus 3 output is 800V, fills electric pile 4 electric connection with a plurality of electric piles respectively through two power cables on direct current bus 3, is provided with a plurality of DC/DC in each fills electric pile 4 and charges module 5, and the input of a plurality of modules 5 that chargeConnected in parallel on the DC bus 3, and the output ends respectively output DC1~DCnThe N-way output, each way output all can be connected with one charging gun 6, realize the simultaneous power supply to many charging guns 6, when the distributed charging system of this structure is built, will fill electric pile 4 and distribute in parking area dispersedly, and link together a plurality of electric piles 4 through direct current bus 3, make the system architecture simplify, when needing to build more electric piles 4 in parking area, only need to lengthen direct current bus 3, be connected with newly-built electric pile 4 of filling through two power cables, can accomplish the upgrading of single parking area, the expansibility of this distributed charging system has been improved, the overall construction cost and the upgrading cost of this distributed charging system have been reduced.
Example 2
As shown in fig. 3 to 11, the structure of the distributed charging system based on the dc bus of the present embodiment is the same as that of embodiment 1, except that: the charging pile is characterized in that four charging guns 6, a power distribution device 7 and a charging management device 9 are arranged in the charging pile 4, N charging modules 5 are arranged in the charging pile 4, the power distribution device 7 is arranged between the charging modules 5 and the charging guns 6, the power distribution device 7 is used for configuring the output power of the charging guns 6, the power distribution device 7 comprises a main control unit 71 and a plurality of switch devices 72, the main control unit 71 adjusts the opening and closing states of the switch devices 72, and the electrical connection relation between the charging guns 6 and the charging modules 5 is changed.
In the distributed charging system based on the dc bus of this embodiment, taking the example of setting N charging modules 5 and four charging guns 6 in a single charging pile 4, the power distribution device 7 is configured to include four switch devices 72, one end of each of the four switch devices 72 is connected to the positive end and the negative end of the output of each charging module 5 through an output cable, and the other end is connected to four charging guns 6, so that the charging modules 5 are connected in parallel, the on-off of the switch device 72 connected to the charging gun 6 is controlled by the main control unit 71 in the power distribution device 7, and further each charging module 5 can be switched to be connected to any one charging gun 6, thereby realizing flexible allocation of the output power of the charging gun 6, realizing the maximum utilization rate of the distributed charging system of this structure, and according to the number of the charging modules 5 and the number of the charging guns 6, whether a power distribution device 7 is arranged in the charging pile or not is selected, so that when the number of the charging modules 5 is less than the number of the charging guns 6, normal work of a plurality of charging guns 6 is realized through the power distribution device 7, when the number of the charging modules 5 is more than the number of the charging guns 6, dynamic allocation of power of each charging gun 6 is realized through the power distribution device 7, normal work of the charging guns 6 is ensured, the distributed charging system with the structure is suitable for normal use under different construction conditions, and the application range is wide.
Preferably, the charging management device 9 includes an electric energy acquisition circuit, an intelligent electric meter, a temperature control protection device, an electric energy detection device and a display screen, the charging management device 9 is in communication connection with the power distribution device 7, the charging management device 9 is also in communication connection with a voltage detection device 10, and the voltage detection device 10 is electrically connected to the direct current bus 3. In the embodiment, functional devices required to be equipped for normal use of the conventional charging pile 4 are preferably arranged in the charging pile 4, when a user requests charging, the charging management device 9 sends the vehicle type and electric quantity information required by the vehicle owner such as expected leaving time and the like and detected information to the power distribution device 7, the power distribution device 7 calculates the expected waiting time and charging time required by the user according to the power distribution condition of the current distributed charging system and the working state of the current charging gun 6, the expected waiting time and charging time are displayed through a display screen, the user can select the charging piles with different powers to use according to the self condition, after charging is started, the charging system can distribute the optimal charging power for the electric vehicle according to the current power distribution condition of the system, flexible allocation of electric energy is realized, the overall utilization rate, the economy and the practicability of the charging piles 4 in a parking area are improved, and meanwhile, the voltage of the direct current bus 3 is detected in real, when the voltage of the power grid changes and exceeds the allowable range, the charging management device 9 is used for cutting off the power supply of the direct current bus 3 in time, each charging pile 4 is closed, the electric vehicle is stopped to be charged, and the safe use of the charging system is ensured.
Example 3
As shown in fig. 3 to 11, the structure of the distributed charging system based on the dc bus of the present embodiment is the same as that of embodiment 2, except that: the charging module 5 includes at least one DC/DC conversion unit 51, and when the number of the conversion units 51 is two or more, the input terminals of the conversion units 51 are connected in series or in parallel, and the output terminals are connected in parallel.
In the distributed charging system based on the dc bus of this embodiment, on the basis of embodiment 2, preferably, two transforming units 51 are disposed inside a single charging module 5, and when the input of the single transforming unit 51 is 800V, the transmission voltage on the dc bus 3 is 1600V, so that under the condition of the same power, the current on the dc bus 3 is reduced, the loss on the cable is reduced, the cable with a smaller line diameter can be selected, the overall construction cost of the charging system is reduced, when the charging system is expanded, the corresponding upgrading cost is lower, the cable is easy and flexible to lay, the economy of the charging system is improved, the number of the transforming units 51 can be adjusted according to the actual situation, the output power of the single charging module 5 is adjusted, and the utilization rate of the charging system is further improved under the condition of not increasing the total power of the system.
Example 4
As shown in fig. 3 to 11, the structure of the distributed charging system based on the dc bus of the present embodiment is the same as that of embodiment 3, except that: fill 4 electrical connection of electric pile with at least one rifle cabinet 8 that charges, the rifle cabinet 8 that charges includes the cabinet body, the internal distribution device 81 and the many rifle 6 that charge of taking turns of being provided with of cabinet, take turns to fill distribution device 81 with fill 4 at least output electrical connection all the way to with many rifle 6 that charge are connected simultaneously, take turns to fully to allocate device 81 and change the input of rifle cabinet 8 that charges and the electrical connection relation of rifle 6 that charges, the configuration the charging order of rifle 6 that charges.
In the distributed charging system based on the dc bus of the present embodiment, on the basis of embodiment 3, by providing the charging gun cabinet 8 electrically connected to the charging pile 4, when the number of covered parking spaces of a single charging pile 4 needs to be increased, the charging gun cabinet 8 can be deployed in a parking space near the single charging pile 4, and one output of the charging pile 4 is correspondingly connected to one charging gun cabinet 8, so as to charge more electric vehicles without increasing system power, because the charging gun cabinet 8 does not include the charging module 5, only the electric energy sent from the charging pile 4 is distributed to a plurality of charging guns 6 through the wheel charging distribution device 81, so that the single charging gun cabinet 8 charges one or more electric vehicles, has a smaller volume, occupies less land, can be conveniently placed near the parking space, and can easily achieve the purpose of charging more electric vehicles without increasing system power, further improving the expandability of the charging system, in the construction of the distributed charging system of this embodiment, preferably, four charging guns 6 and one wheel charging distribution device 81 are arranged in a single charging gun cabinet 8, the wheel charging distribution device 81 includes four switching devices of K1-K4, each switching device is correspondingly connected with one charging gun 6, and the controllers of the wheel charging distribution devices 81 arranged in the charging gun cabinet 8 respectively control the on-off of K1-K4, so that the sequential communication between the four charging guns 6 and the charging gun cabinet 8 input side is realized, and the four charging guns 6 respectively charge the electric vehicle electrically connected with the charging guns.
Preferably, a charging management device 9 is also arranged in the charging gun cabinet 8, and the charging management device 9 is respectively in communication connection with the wheel charging distribution device 81 and the power distribution device 7 of the charging pile 4. In this embodiment, preferably, the charging management device 9 includes a power acquisition circuit, an intelligent electric meter, a temperature control protection device, an electric energy detection device, a display screen and other functional devices that need to be equipped for normal use of the conventional charging pile 4, when a user requests charging, the charging management device 9 sends the information of the vehicle type and electric quantity and the requirements such as the expected leaving time of the owner and the detected vehicle type and electric quantity to the power distribution device 7 in the charging pile 4 correspondingly connected, the power distribution device 7 calculates the expected waiting time and charging time required by the user according to the power distribution condition of the current distributed charging system and the working state of the current charging gun cabinet 8, and displays the expected waiting time and charging time on the display screen, so that the user can agree to charge the current parking space or change the current parking space to other vacant parking spaces according to the own condition, and when the user agrees to, the optimal charging power is distributed for the electric vehicle, and the power information is fed back to the power distribution device 7 for updating, so that the flexible allocation of electric energy is realized, and the overall utilization rate, economy and practicability of the charging piles in the parking area are further improved.
Example 5
As shown in fig. 3 to 11, the structure of the distributed charging system based on the dc bus of the present embodiment is the same as that of embodiment 4, except that: the charging gun cabinet comprises a quick charging area 20 and a general charging area 30, wherein the charging gun cabinet 8 is arranged in the general charging area 30.
In the distributed charging system based on the direct current bus of the embodiment, on the basis of the embodiment 4, a plurality of charging piles 4 and charging gun cabinets 8 are arranged according to the partition of a quick charging area 20 and a common charging area 30, only the charging piles 4 are arranged in the quick charging area 20, the output of the charging piles 4 is directly connected with the charging guns 6 and is not connected with the charging gun cabinets 8, in the common charging area 30, the charging piles 4 are not only connected with the charging guns 6 which can be directly connected with an automobile, but also connected with the charging gun cabinets 8, so that the charging piles 4 and the charging gun cabinets 8 which are arranged along the laying path of the direct current bus 3 are arranged in the partition, a user can select the charging guns 6 in the charging piles 4 with larger output power to carry out non-waiting quick charging according to the actual conditions in the quick charging area 20, or select the charging guns 6 in the charging gun cabinets 8 which need to wait to be charged in the common charging area 30 to carry out charging when the user needs to stay for a longer time nearby, the cooperation of realization charging process and user actual conditions improves the utilization ratio, economic nature and the practicality of the interior electric pile that charges of this charging system, and the at utmost has solved the technical problem that current charging station fills electric pile low-usage.
The above embodiments are only used to illustrate the present invention and not to limit the technical solutions of the present invention, and although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above embodiments, therefore, any modifications or equivalent replacements of the present invention can be made, and all technical solutions and modifications without departing from the spirit and scope of the present invention should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a distributed charging system based on direct current bus which characterized in that: the charging pile comprises a multi-pulse-wave rectifying circuit electrically connected with a high-voltage power grid, wherein the output end of the multi-pulse-wave rectifying circuit is connected with a direct-current bus, the charging pile further comprises a plurality of charging piles, at least one DC/DC charging module is arranged in the charging pile, the input side of each charging pile is electrically connected onto the direct-current bus, and the output side of each charging pile is electrically connected with at least one charging gun and/or at least one charging gun cabinet.
2. The distributed charging system of claim 1, wherein: the charging device is characterized in that a power distribution device is arranged in the charging pile, the power distribution device is arranged between the charging module and the charging gun, and the power distribution device is used for configuring the output power of the charging gun.
3. A distributed charging system as in claim 2, wherein: the power distribution device comprises a main control unit and a plurality of switch devices, wherein the main control unit adjusts the on-off state of the switch devices and changes the electrical connection relation between the charging module and the charging gun.
4. The distributed charging system of claim 1, wherein: the rifle cabinet that charges includes the cabinet body and sets up a plurality of guns that charge that the cabinet is internal, the rifle cabinet that charges with fill electric pile output electrical connection all the way at least.
5. The distributed charging system of claim 4, wherein: the charging gun cabinet is internally provided with a wheel charging distribution device, the input side of the wheel charging distribution device is electrically connected with at least one path of output of the charging pile, and the wheel fully distribution device is used for configuring the charging sequence of the charging guns in the charging gun cabinet.
6. The distributed charging system of claim 1, wherein: charging management devices are respectively arranged in the charging pile and the charging gun cabinet.
7. A distributed charging system as in any one of claims 1-6, wherein: the charging module comprises at least one DC/DC conversion unit, when the number of the conversion units is two or more, the input ends of the conversion units are connected in series or in parallel, and the output ends of the conversion units are connected in parallel.
8. The distributed charging system of claim 6, wherein: and the direct current bus is electrically connected with a voltage detection device, and the voltage detection device is in communication connection with the charging management device.
9. The distributed charging system of claim 1, wherein: including fast district and the general district of filling, the rifle cabinet that charges sets up general fill in the district.
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| CN201921208796.4U CN210309959U (en) | 2019-07-30 | 2019-07-30 | Distributed charging system based on direct current bus |
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| CN111823924A (en) * | 2020-07-19 | 2020-10-27 | 国网山西省电力公司电力科学研究院 | Parking lot shared direct-current charging pile, charging method and charge calculation method |
| CN112217264A (en) * | 2020-10-21 | 2021-01-12 | 阳光电源股份有限公司 | Charging pile and charging unit thereof |
| CN112248828A (en) * | 2020-11-04 | 2021-01-22 | 国网智慧能源交通技术创新中心(苏州)有限公司 | High-power high-voltage access type IGBT charging mechanism |
| CN112356726A (en) * | 2020-11-04 | 2021-02-12 | 西安蓝豆新能源科技有限公司 | Alternating current time-sharing alternate charging device and method |
| CN112421740A (en) * | 2020-11-02 | 2021-02-26 | 阳光电源股份有限公司 | Charging pile system and charging pile power distribution control method |
| CN112531819A (en) * | 2020-11-20 | 2021-03-19 | 广州共享出行科技有限公司 | Charging control method and device for mobile power supply |
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| CN111823924A (en) * | 2020-07-19 | 2020-10-27 | 国网山西省电力公司电力科学研究院 | Parking lot shared direct-current charging pile, charging method and charge calculation method |
| CN111823924B (en) * | 2020-07-19 | 2024-02-06 | 国网山西省电力公司电力科学研究院 | Charging method and cost calculation method for parking lot shared direct current charging pile |
| CN112217264A (en) * | 2020-10-21 | 2021-01-12 | 阳光电源股份有限公司 | Charging pile and charging unit thereof |
| CN112421740A (en) * | 2020-11-02 | 2021-02-26 | 阳光电源股份有限公司 | Charging pile system and charging pile power distribution control method |
| CN112421740B (en) * | 2020-11-02 | 2024-05-14 | 阳光电源股份有限公司 | Charging pile system and charging pile power distribution control method |
| CN112248828A (en) * | 2020-11-04 | 2021-01-22 | 国网智慧能源交通技术创新中心(苏州)有限公司 | High-power high-voltage access type IGBT charging mechanism |
| CN112356726A (en) * | 2020-11-04 | 2021-02-12 | 西安蓝豆新能源科技有限公司 | Alternating current time-sharing alternate charging device and method |
| CN112356726B (en) * | 2020-11-04 | 2022-07-15 | 西安蓝豆新能源科技有限公司 | Alternating current time-sharing alternate charging device and method |
| CN112531819A (en) * | 2020-11-20 | 2021-03-19 | 广州共享出行科技有限公司 | Charging control method and device for mobile power supply |
| CN112531819B (en) * | 2020-11-20 | 2024-04-09 | 殷富利有限公司 | Charging control method and device for mobile power supply |
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