A kind of common bus intelligent flexible charging system
Technical field
This utility model relates to a kind of charging system for electric automobile, is specifically related to a kind of common bus intelligent flexible charging
System.
Background technology
The at present fast development of charging pile is a needs urgent problem for electrical network with surge, and flexible
Charging system not only can solve electrical network shock problem, it is also possible to optimizes charging system, meets the charge requirement of different automobile;
Existing flexible charging system is essentially all employing switching system and output charging terminal is charged management,
To reach the purpose of flexible charging, system diagram is as it is shown in figure 1, use modularized design, and prime is made up of N number of charging module, complete
The function of conclusion of the business circulation direct current, output voltage is adjusted according to the demand of electric automobile.The power of each charging module exists
The quantity of 7.5kW ~ 20kW, N determines according to the power of system total power and single charging module.Charging module output connects
To switching system.Switching system is made up of electrical switch or mechanical switch, carries out different switch shape according to the order of controller
The switching of state.Switching system output is attached directly to M charging terminal, and the quantity of M determines according to no application scenarios.Each fill
Electric terminals carries out charge independence can to 1 electric automobile.
The complexity of existing flexible charging system is control and the reliability of switching system.The power of each charging terminal
Segment the thinnest, then switching system is the most complicated, and the number of switches of needs is the most, and reliability is the poorest, and cost is the highest, therefore in reality
There is a lot of hidden danger in application, actual popularization and application are little.
The shortcoming that existing charging system exists is as follows: it is complicated that switching system controls logic, and a set of charging system needs tens
Individual electrical switch or mechanical switch, control difficulty big, easily make mistakes, and causes output cannot ensure safe electrical isolation;Huge
Switching system, need complicated wiring, take up room big, device three anti-protection difficulty, it is difficult to safeguard;Due to electrical switch and
Mechanical switch needs frequently to switch in charging process, and is direct current switching, and device reduces service life, poor reliability;Open
Connect complexity between pass system and each module, be unfavorable for that modularity dilatation or configuration adjust.
Summary of the invention
The purpose of this utility model is to provide a kind of bus intelligent flexible charging system, exists to overcome in prior art
Defect.For achieving the above object, the technical solution of the utility model is: a kind of common bus intelligent flexible charging system, including:
It is arranged at the first to N AC/DC rectification module of exchange input side, is arranged at charging outlet side and corresponds respectively to charging eventually
The first to M DC/DC charging module and controller that end is connected, described first to N AC/DC rectification module the most defeated
Going out end and be respectively connected to positive direct-current bus BUS+, negative output terminal is respectively connected to negative dc bus BUS-;Described first to M DC/DC
The positive input terminal of charging module is respectively connected to described positive direct-current bus BUS+, and negative input end is respectively connected to described negative dc bus
BUS-;Described controller is respectively connected to described first to N AC/DC rectification module and described first to M DC/DC charging
Module, wherein, N Yu M is positive integer.
In this utility model one embodiment, M is 2, a described DC/DC charging module and the 2nd DC/DC charging module
Being also connected with a switching systems, described switching systems includes the first switch to the 8th switch, a described DC/DC charging
One end of positive output termination the first switch of module, one end of the 6th switch;The negative output terminal of a described DC/DC charging module
It is connected to the 3rd switch one end, the 8th switch one end;The one of the positive output termination second switch of described 2nd DC/DC charging module
End, one end of the 5th switch;The negative output terminal of described 2nd DC/DC charging module is connected to the 4th switch one end, the 7th switch one
End;The other end of another termination second switch of described first switch is as the first positive output end of system, described 3rd switch
The other end of another termination the 4th switch open as the first negative output terminal of system, another termination the 6th of described 5th switch
The second positive output end that the other end is system closed;The other end of another termination the 8th switch of described 7th switch is system
Second negative output terminal.
In this utility model one embodiment, a DC/DC charging module and the 2nd DC/DC charging module are connected to
One switching systems, the 3rd DC/DC charging module and the 4th DC/DC charging module are respectively connected to second switch switching and are
System ..., M-1 DC/DC charging module and M DC/DC charging module are respectively connected to M/2 switching systems, wherein, M
For the even number more than 2.
In this utility model one embodiment, described first switching systems to described M/2 switching systems is equal
Including the first switch to the 8th switch.
In this utility model one embodiment, a described DC/DC charging module, described 3rd DC/DC charging mould
Block ..., the positive output end of described M-1 DC/DC charging module are connected respectively to described first switching systems to institute
Stating one end and one end of the 6th switch that first in M/2 switching systems switchs, negative output terminal is connected respectively
One end and the 8th of the 3rd switch in described first switching systems to described M/2 switching systems switchs
One end.
In this utility model one embodiment, described 2nd DC/DC charging module, described 4th DC/DC charging mould
Block ..., the positive output end of described M DC/DC charging module are connected respectively to described first switching systems to described
One end of second switch in M/2 switching systems and the 5th switch one end, negative output terminal be connected respectively to
One end of the 4th switch in described first switching systems extremely described M/2 switching systems and the one of the 7th switch
End.
In this utility model one embodiment, in described first switching systems to described M/2 switching systems
The other end of the first switch be connected with the other end of second switch, and respectively as the first positive output end, the 3rd positive output
End ..., M-1 positive output end;The 3rd switch in described first switching systems extremely described M/2 switching systems
The other end of the other end and the 4th switch is connected, and bears defeated respectively as the first negative output terminal, the 3rd negative output terminal ..., M-1
Go out end.
In this utility model one embodiment, in described first switching systems to described M/2 switching systems
The other end of the 5th switch and the other end of the 6th switch be connected, and respectively as the second positive output end, the 4th positive output
End ..., M positive output;Described first switching systems is to another of the 7th switch in described M/2 switching systems
The other end with the 8th switch is held to be connected, and respectively as the second negative output terminal, the 4th negative output terminal ..., M negative output terminal.
In this utility model one embodiment, described first to N AC/DC rectification module is the AC/ of three-phase four-wire system
DC module;The A phase input of described first to N AC/DC rectification module is respectively connected to the A phase of three-phase four-wire system civil power, B phase
Input is respectively connected to the B phase of three-phase four-wire system civil power, and C phase input is respectively connected to the C phase of three-phase four-wire system civil power, and PE end divides
It is not connected to the PE end of three-phase four-wire system civil power.
In this utility model one embodiment, described first to M DC/DC charging module is isolated form DC/DC mould
Block.
In this utility model one embodiment, described first to M DC/DC charging module is isolated form DC/DC mould
Block.
Compared to prior art, this utility model has the advantages that
1, replacing switching system with dc bus, be greatly improved the reliability of charging system, reduce complexity, raising can
Maintainability;Prime and rear class all use modular technology, facilitate dilatation and system upgrade;Can reach between each charging terminal
Electrical isolation completely, is greatly improved the security reliability of system, is also beneficial to the safe charging of electric automobile;
2, output distribution is more flexible, really realizes stepless changing power, it is achieved flexible charging;Do not exist many simultaneously
Power switching between individual module, system reliability is greatly improved;
3, each outlet terminal can realize the seamless switching of output, is not affected by switching switching system,
Two DC/DC charging modules use a set of switching systems, the most only 8 switches, and quantity is few, be easily controlled, reliability
Being guaranteed, often set switching systems is independent mutually, it is achieved electrical isolation, safe class is guaranteed;
4, system complete machine power reduces by 50% than existing common bus technology, and the peak power output of charging terminal is with existing simultaneously
There is technology the same, substantially increase the utilization rate of equipment and installations of system, thus reduce cost.
Accompanying drawing explanation
Fig. 1 is existing flexible charging system.
Fig. 2 is the schematic diagram of this utility model one embodiment common bus intelligent flexible charging system.
Fig. 3 is the schematic diagram of another embodiment common bus intelligent flexible charging system of this utility model.
Fig. 4 is the schematic diagram of another embodiment common bus intelligent flexible charging system of this utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the technical solution of the utility model is specifically described.
Embodiment 1
This utility model provides a kind of common bus intelligent flexible charging system, as in figure 2 it is shown, include first to N AC/
DC rectification module, the first to M DC/DC charging module, controller, the positive output end of first to N rectification module is respectively connected to
Positive direct-current bus BUS+, the negative output terminal of first to N rectification module is respectively connected to negative dc bus BUS-, and first to M
The positive input terminal of DC/DC charging module is respectively connected to positive direct-current bus BUS+, the negative input of first to M DC/DC charging module
End is respectively connected to negative dc bus BUS-;Controller be respectively connected to the first to N AC/DC rectification module, first to M DC/
DC charging module;
Further, in the present embodiment, the first to N AC/DC rectification module is respectively the AC/ of a three-phase four-wire system
DC module, the A phase input of the first to N AC/DC rectification module is respectively connected to the A phase of three-phase four-wire system civil power, and first to
The B phase input of N AC/DC rectification module is respectively connected to the B phase of three-phase four-wire system civil power, the first to N AC/DC rectification module
C phase input be respectively connected to the C phase of three-phase four-wire system civil power, the PE end of the first to N AC/DC rectification module is respectively connected to
The PE of three-phase four-wire system civil power.
Further, in the present embodiment, DC/DC charging module is isolated form DC/DC module composition.
Further, in the present embodiment, busbar voltage is invariable, and even mode can be with optimization and collation module for this kind
Design, improve efficiency, reduce cost.The power of each rectification module is total according to system in the quantity of 7.5kW ~ 20kW, N
The power of power and single charging module determines.
DC master row output is attached directly to M charging module, and charging module only carries out the conversion of one-level DC/DC, output voltage
Demand according to electric automobile is adjusted.The power of charging module determines, typically at 60kW ~ 120kW according to reality application
Between.Each charging module is individually connected to the charging terminal of correspondence, carries out charge independence to electric automobile.The quantity of M according to
No application scenarios determines.
Further, in the present embodiment, charging module when there is no charging electric vehicle demand in a dormant state, no
Power energy can be obtained from dc bus.Controller, according to actual charge requirement, selects the working quantity of rectification module (not work
Then enter resting state), thus reach the purpose of flexible charging, electrical network will not be formed impact;Owing to having evaded switching system,
Thus the reliability of whole charging system is provided significantly.
Embodiment 2
In order to further provide for security of system, the DC/DC charging module at two-way connects a switching systems, it is achieved
Electrical isolation is realized between DC/DC charging module and charging terminal.
As shown in Figure 3, it is provided that another kind of common bus intelligent flexible charging system, including the first to N AC/DC rectification
Module, correspond respectively to charging terminal be connected the first to M DC/DC charging module, controller, first to N rectification module
Positive output end be respectively connected to positive direct-current bus BUS+, it is female that the negative output terminal of first to N rectification module is respectively connected to negative direct current
Line BUS-, the positive input terminal of the first to M DC/DC charging module is respectively connected to positive direct-current bus BUS+, and first to M DC/
The negative input end of DC charging module is respectively connected to negative dc bus BUS-;Controller is respectively connected to the first to N AC/DC rectification
Module, the first to M DC/DC charging module.
In the present embodiment, charging terminal includes connecting charging load charging pile or the charging pile without charging load.
Further, in the present embodiment, the first to N AC/DC rectification module is respectively the AC/ of a three-phase four-wire system
DC module, the A phase input of the first to N AC/DC rectification module is respectively connected to the A phase of three-phase four-wire system civil power, and first to
The B phase input of N AC/DC rectification module is respectively connected to the B phase of three-phase four-wire system civil power, the first to N AC/DC rectification module
C phase input be respectively connected to the C phase of three-phase four-wire system civil power, the PE end of the first to N AC/DC rectification module is respectively connected to
The PE of three-phase four-wire system civil power.
Further, in the present embodiment, M is even number, and a DC/DC charging module and the 2nd DC/DC charging module divide
Not being connected to the first switching systems, the 3rd DC/DC charging module and the 4th DC/DC charging module are respectively connected to second switch and cut
Change system ..., by that analogy, M-1 DC/DC charging module and M DC/DC charging module are respectively connected to M/2 switch
Switched system.
Further, in the present embodiment, first is constituted to M/2 switching systems by the first to the 8th switch.
Wherein, the positive output end of a DC/DC charging module is respectively connected to one end of the first switch K1, one end of the 6th switch K6, the
The negative output terminal of one DC/DC charging module is respectively connected to the 3rd switch one end of K3, one end of the 8th switch K8, correspondence, the
Three DC/DC charging modules, the 5th DC/DC charging module, M-1 DC/DC charging module is connected to the most in this way
The corresponding switch in switching systems.
The positive output end of the 2nd DC/DC charging module is respectively connected to one end of second switch K2, one end of the 5th switch K5,
The negative output terminal of the 2nd DC/DC charging module is respectively connected to the 4th switch one end of K4, one end of the 7th switch K7, correspondence,
4th DC/DC charging module, the 6th DC/DC charging module, M DC/DC charging module is connected to the most in this way
The corresponding switch in switching systems.
The other end of the first switch K1 in the first switching systems is connected to the other end of second switch K2 as first
Positive output end, is connected to the positive input terminal of the first charging terminal;The other end of the 3rd switch K3 is connected to another of the 4th switch K4
End, as the first negative output terminal, is connected to the negative input end of the first charging terminal;Corresponding, the second to M/2 switch switching is
Switch in system be correspondingly connected to the 3rd charging terminal, the 5th charging terminal, the input of M-1 charging terminal.
The other end of the 5th switch K5 in the first switching systems is connected to the other end of the 6th switch K6 as second
Positive output end, is connected to the positive input terminal of the second charging terminal;The other end of the 7th switch K7 is connected to another of the 8th switch K8
End, as the second negative output terminal, is connected to the negative input end of the second charging terminal.Corresponding, the second to M/2 switch switching is
Switch in system be correspondingly connected to the 4th charging terminal, the 6th charging terminal, the input of M charging terminal.
Further, in the present embodiment, first to each switch specific works pattern in M/2 switching systems
As follows:
Using the charging system of the present embodiment, its complete machine power reduces by 50% than prior art, and charging terminal is the most simultaneously
Big output is the same with prior art, substantially increases the utilization rate of equipment and installations of system, thus reduces cost;Each outlet terminal
The seamless switching of output can be realized, do not affected by switching switching system;Two modules use a set of switch to cut
Changing system, at most only 8 switches, quantity is few, be easily controlled, and reliability is guaranteed;Often set switching systems is the most only
Vertical, it is achieved electrical isolation, safe class is guaranteed.
Embodiment 3
Also provide for a kind of common bus intelligent flexible charging system, can be used for 2 charging terminals and use, be arranged at exchange input
The first of side to N AC/DC rectification module, be arranged at charging outlet side and correspond respectively to charging terminal be connected first to
2nd DC/DC charging module and a controller, the positive output end of the first to N AC/DC rectification module is respectively connected to honest
Stream bus BUS+, negative output terminal is respectively connected to negative dc bus BUS-;The positive input terminal of the first to M DC/DC charging module divides
Not being connected to positive direct-current bus BUS+, negative input end is respectively connected to negative dc bus BUS-;Controller is respectively connected to first to N
AC/DC rectification module and the first to the 2nd DC/DC charging module.
Oneth DC/DC charging module and the 2nd DC/DC charging module are also connected with a switching systems, switching systems
Including the first switch to the 8th switch K1 ~ K8, one end of positive output termination the first switch K1 of a DC/DC charging module, the
One end of six switch K6;The negative output terminal of the oneth DC/DC charging module is connected to the 3rd switch K3 one end, the 8th switch K8 one end;
Positive output termination one end of second switch K2 of 2nd DC/DC charging module, one end of the 5th switch K5;2nd DC/DC charging
The negative output terminal of module is connected to the 4th switch K4 one end, the 7th switch K7 one end;Another termination second switch of first switch K1
The other end of K2 is as the first positive output end of system, and the other end of another termination the 4th switch K4 of the 3rd switch K3 is as being
First negative output terminal of system, second positive output end that the other end is system of another termination the 6th switch K6 of the 5th switch K5;
Second negative output terminal that the other end is system of another termination the 8th switch K8 of the 7th switch K7.
It is above preferred embodiment of the present utility model, all changes made according to technical solutions of the utility model, is produced
Function without departing from the scope of technical solutions of the utility model time, belong to protection domain of the present utility model.