CN108736543A - A kind of DC charging plant capacity module switching at runtime system and method - Google Patents
A kind of DC charging plant capacity module switching at runtime system and method Download PDFInfo
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- CN108736543A CN108736543A CN201810562504.0A CN201810562504A CN108736543A CN 108736543 A CN108736543 A CN 108736543A CN 201810562504 A CN201810562504 A CN 201810562504A CN 108736543 A CN108736543 A CN 108736543A
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Abstract
The present invention provides a kind of DC charging plant capacity module switching at runtime systems, including control module, several power modules, several handover modules, switchover policy algorithm；Each handover module is electrically connected with several power modules, each power module is electrically connected with unique handover module, control module is connect with each power module and handover module signal respectively, and control module is electrically connected with each handover module, handover module and the electrical connection of each charge port.After uniform protocol, this system can easily access in the master control system of DC charging equipment.The present invention can improve the utilization rate of DC charging plant capacity module, to improve the charge efficiency of charging equipment.
Description
Technical field
The present invention relates to a kind of electric vehicle charging techniques, especially a kind of DC charging plant capacity module switching at runtime system
System.
Background technology
Currently, DC charging equipment in the market relies on power module by the three-phase alternating current of input through over commutation, filtering
The electric current needed for charging vehicle is provided with DC current is exported after voltage stabilizing, direct current is adjusted by changing the quantity of power module
The power grade of charging equipment is suitable for a plurality of types of electric vehicles with this.In order to guarantee to export sufficiently large charging
Electric current, charging equipment is interior to carry out electric current output, required current uniform to every power by the way of more power module parallels
Module.
High-power integrated multiple gun DC charging equipment mostly uses greatly wheel and fills or fill two kinds of charging modes.Wheel, which fills, to be referred to
It when more electric vehicle reservation chargings, is charged first to first car with maximum power, remaining reservation vehicle queue waiting is filled
Electricity waits previous vehicle charging complete that could charge to next automobile, i.e., the same time can only give an electric vehicle to charge.This
The advantages of kind charging modes, is to be that an electric vehicle charges, but phase output current is smaller after charging, work(at full tilt
The utilization rate of rate module is low.
It is the pattern that can meet more vehicles while charging to fill, when the charging of only vehicle, similar, institute of filling mode with wheel
Having power module, output is Vehicular charging at full speed, and power module assigns to multiple charge ports when charging if there is more trolleys, realizes
More vehicles charge simultaneously.Filling mode has simple power dividing function, but still can not avoid charging later stage power module profit
With the low problem of rate.
Invention content
The purpose of the present invention is to provide a kind of DC charging plant capacity module switching at runtime system and method, Neng Gouti
The utilization rate of high DC charging plant capacity module, to improve the charge efficiency of charging equipment.
Realize that the technical solution of the object of the invention is：A kind of DC charging plant capacity module switching at runtime system, including
Control module, several power modules, several handover modules, switchover policy algorithm；Each handover module and several power modules electricity
Connection, each power module are electrically connected with unique handover module, and control module is believed with each power module and handover module respectively
Number connection, control module is electrically connected with each handover module, and handover module and each charge port are electrically connected；Switchover policy algorithm portion
Divide the voltage and current requirement returned according to external charging terminal BMS, determines that the grouping of power module and charge power export, one
Or multiple power modules and same exterior terminal battery are connected as terminal power supply, handover module power switched module from one
The connection of exterior terminal battery becomes connecting with another exterior terminal battery, and setting charging priority arranges in the master control system that charges
Table, the not middle record exterior terminal battery of charging priority row obtain the sequence of power module charging, and control module is returned according to BMS
Current Voltage index, compare the idle available power of power module, generate the instruction of distribution power module.
A kind of DC charging plant capacity module dynamic switching method, including：
The master control system that charges generates charging priority；
The charge requirement that control module is returned according to the exterior terminal BMS of highest priority, i.e. electric current and voltage, for its point
With power module, ensure its charge power；
Switchover policy algorithm compares the fully loaded output of the charge requirement and power module of exterior terminal in real time, and according to charging
Priority is the charge power needed for the exterior terminal battery-allocated of sub-priority in due course；
By charging priority distribution power module, the battery of upper level priority is according to its required charge power distribution power
Dump power module is cut out the battery for distributing to next stage priority by module if having residue.
The present invention compared with prior art, the advantage is that：(1) according to the in due course required power shape of exterior terminal battery
State adjusts the quantity of power module, realizes the switching at runtime of power module in charging process, improves DC charging equipment and filling
The utilization rate of electric later stage power module；(2) handover module extension in parallel, control module can support different scales according to demand
Handover module realizes one piece of multiple handover module of control circuit stability contorting.
The invention will be further described with reference to the accompanying drawings of the specification.
Description of the drawings
Fig. 1 is present system functional block diagram.
Fig. 2 is configuration mode schematic diagram of the power module dynamic switching device of the present invention in rush-harvesting and rush-planting DC equipment.
Specific implementation mode
In conjunction with Fig. 1, a kind of DC charging plant capacity module switching at runtime system, including control module 1, several power moulds
Block group 2, switch unit 3 and switchover policy algoritic module.Switch unit 3 includes several handover modules.If each handover module with
The electrical connection of dry power module, each power module are electrically connected with unique handover module, control module respectively with each power calculation
Module is connected with control module signal, and control module is electrically connected with each handover module, and handover module and each charge port are electrically connected
It connects.
The voltage and current requirement that switchover policy algoritic module is returned according to external charging terminal BMS, determines power module
Grouping and charge power output, the corresponding power module of each charging interface are one group, and charge power exports the electricity returned by BMS
Current voltage requires to determine.One or more power modules are connected as terminal power supply, handover module with same exterior terminal battery
Power switched module becomes connecting with another exterior terminal battery from connecting with an exterior terminal battery, switchover policy algorithm
Charging priority list is set in module, exterior terminal battery is recorded in charging priority list and obtains the suitable of power module charging
Sequence, the Current Voltage requirement that control module is returned according to BMS, compares the idle available power of power module, generates distribution
The instruction of power module, control module send the instruction of distribution power module to handover module.
Each handover module 3-i (i=1,2, m) and several power module 2-j (j=1,2, n) electricity
Connection, each power module 2-j (j=1,2, n) be electrically connected with unique handover module, control module 1 respectively with it is each
Power module is connected with handover module signal；The voltage and current that switchover policy algorithm part is returned according to external charging terminal BMS
It is required that determining grouping and the charge power output of power module, one or more power module 2-j and same charge port 4-k (k
=1,2, m) it connects and powers for corresponding exterior terminal, handover module 3-i switches work(under the control of control module 1
Rate module 2-i becomes connecting with another charge port from connecting with a charge port, and setting charging is preferential in the master control system that charges
Grade list records the sequence that charge port 4 obtains power module charging, the switchover policy of control module 1 in charging priority list
The charge requirement that algorithm is returned according to exterior terminal BMS generates the instruction of distribution power module, and control module 1 is to switch unit 3
Send the instruction of distribution power module.
Each handover module 3-i includes 2N switching device, and the output of each power module 2-j has two-way, respectively OUT
+ and OUT-；The OUT+ and OUT- of power module 6 pass through the corresponding pole of N number of switching device of handover module and N number of charge port respectively
Interface is connected.
The hardware of device is made of control circuit, IGBT drive circuit and protection circuit.On the one hand control circuit receives fills
The working condition message that the charge data and handover module 3-i of electric equipment master control system transmit, on the other hand needs to power mould
Block 2-j and handover module 3-i send control instruction.Due to current four handover module 3- of small-sized DC charging pile common configuration
I, and it is in the majority with rush-harvesting and rush-planting charge port, and large-sized DC charging pile can double on this basis.So the minimum unit of handover module with
Rush-harvesting and rush-planting direct current stake is standard, carries 4 IGBT switching devices on each handover module base unit, a power mould may be implemented
The two-way of block exports the switching between the positive and negative anodes wiring of two charge ports, i.e., each IGBT is connected electrically in the defeated of power module
Go out between the input line of charge port.IGBT drive circuit uses binary channels isolation drive module, each IGBT to need individually to drive
It is dynamic.It includes IGBT overvoltage crowbars and temperature sensing circuit to protect circuit.IGBT overvoltage crowbars are used for that IGBT is inhibited to close
Peak voltage is generated when disconnected, temperature sensing circuit detects the real time temperature of IGBT using micromation digital temperature sensor.
In conjunction with Fig. 2, by taking rush-harvesting and rush-planting DC charging equipment as an example, each handover module 3 is made of eight switching devices, and one is cut
Can arrange in pairs or groups two power modules 2 of mold changing block 3 realize output switching.The n grouping of power module 2 passes through corresponding handover module 3
It is connect with two charging interfaces, the different switching devices of handover module 3 open or close accordingly under the control of control module 1
Realize the replacement of charging port different capacity.
The software of device uses multitasking frame, and function module includes at switchover policy, switching control and failure
Reason.Switchover policy is made of charging Detection task and switching determination task, and charging monitoring task is for monitoring all charging vehicles
Real time charging information, include the reality output information of the charge requirement information of vehicle and charging equipment, it is real to be switched and determined task
The automatic distribution of existing power module and the switching at runtime of power module.Switching control is grouped task by module and switching is appointed
Business is constituted, and after switchover policy module determines the distribution method or switching at runtime of power module, is needed to involved
Power module is grouped again, and power module is distributed to different charging vehicles, while power module is grouped again
It is also required to change the on off state in handover module and the output switching for not realizing power module.Troubleshooting is then to power module
The failure that dynamic switching device operational process is likely encountered is detected and handles.The overall procedure of running software is：In equipment
The initialization that each hardware module is carried out after electricity, then circularly calls each subfunction in principal function, when having in hardware
When disconnected triggering, data processing is carried out into interrupt service routine, is come back in principal function after end of run.
Switching at runtime control strategy in software includes following three aspects：
(1) division of charging priority：The peak power output of every DC charging equipment is limited, multiple external whole when having
It is needed when end-cell is charged for the distribution of each exterior terminal battery progress charge power.In order to make the distribution of charge power
It is carried out according to certain rule, needs to set charging priority to each exterior terminal battery, according to the sequence point of charging priority
With charge power, to ensure the order of Charge Management.Charging priority depends on charging external end cell and charging end
The sequencing of mouth connection, i.e., the exterior terminal battery first being connect with charging equipment charging port have high charge priority.Such as
The exterior terminal battery charging complete of fruit high priority terminates in advance charging, then the exterior terminal battery of low priority is preferential
The automatic going up one level of grade.If there is a situation where multiple exterior terminal batteries to be connected simultaneously with charging port, according to charging port
Number determine the charging priority of exterior terminal battery, i.e., with the exterior terminal battery numbering forward charging port and be connected
With compared with high charge priority.
(2) determination method of charge power distribution and power module switching at runtime：When the priority of exterior terminal battery is true
After fixed, charging equipment is charge power of the highest exterior terminal battery-allocated of charging priority needed for it first, passes through analysis
The charge requirement message that its BMS is sent out distributes the power module of respective numbers after being computed for it.Meeting, highest charging is excellent
Still there is idle power module after the power demand of first grade exterior terminal battery, is then the high exterior terminal of charging priority second
Battery-allocated charge power, distribution method is similar with front, still needs to by analyzing Vehicular charging demand.If remaining work(at this time
The always output of rate module cannot be satisfied the charge requirement of exterior terminal battery, then all power modules is all assigned to the exterior terminal
Battery is charged as its offer charge power；If dump power module, which always exports, can meet its charge requirement, by calculating
The power module of respective numbers is distributed for it afterwards, remaining charging module is then used to distribute to the lower exterior terminal of priority
Battery, distribution method are same as above.
(3) as the progress of charging, the electromotive force of exterior terminal battery pack can increase, charging current can be gradually reduced, because
The charge requirement of this external end cell can also change.By the reality output and charging vehicle that constantly monitor charging equipment
Charge requirement, can reduce the quantity of power module when finding that the charge requirement of exterior terminal battery drops to and can meet
When, then power module is cut out, the output by improving dump power module ensures that the charging of exterior terminal battery is unaffected.
The power module cut out needs sub-distribution again according to real-time charging situation.If the exterior terminal electricity of low charging priority at this time
The power module cut out from the charging process of high charge priority is then put into this by the charge requirement in pond if cannot be satisfied
In charging process, to realize the switching at runtime of power module.If the charge requirement of all charging external end cells at this time
All met or charged without other vehicles, then all modules cut out are in standby, and wait for exterior terminal
Battery comes to charge.According to such switching method, when the high Vehicular charging of charging priority soon at the end of, it is only a small amount of
Power module stays in the charging process, goes or is in standby or other modules are put into new charging process
Vehicle is waited for come to charge.
Specifically, a kind of DC charging plant capacity module dynamic switching method, includes the following steps：
Step S1, charging master control system generate charging vehicle priority list；
Step S2, control module obtain the charge requirement that the highest exterior terminal battery BMS of current priority is reported, and complete
At the process of step S201 to S204；
Step S201, control module compare the charge requirement I of the exterior terminal battery of highest priority1With single power mould
The rated output I of blocke, in the case of preferentially meeting its demand, determine the power module quantity distributed to current charging process
Num1；
Step S202, if the allocation result of S201 has, power module is remaining, by distribution condition to power module group weight
It is new to send grouping instruction；If power module retains the default packet of power module without residue；
Step S203, control module send to switch unit and instruct, open and used needed for the charging process of highest priority
Power module and corresponding charge port between electrical connection, disconnect the electrical connection between power module and other charge ports；
Step S3, the charge requirement that control module is reported according to the exterior terminal battery BMS in current charging process are completed
The process of step S301 to S304；
Step S301, if (Num1-1) * Ie<I1≤Num1*Ie, then keep power module grouping constant, then go to
S303 steps；
Step 302, if (Num1-2) * Ie<I1≤(Num1-1)*Ie, then power module group is grouped again, cuts out and works as
The last one power module in preceding grouping, if next stage priority has vehicle queue, put into the charging of next priority into
Cheng Zhong, it is no then idle, then go to S303；
Step 303, according to the charge requirement that external end cell BMS is sent in current process, to the work(in current process
Rate module sends instruction, adjusts the output power of each module；
Step S4, if also remaining number of modules after the complete power module of exterior terminal battery-allocated of highest priority
Num2, then open the high Vehicular charging of priority second, and control module obtains the high exterior terminal battery of current priority second
The charge requirement I that BMS is reported2, the process that calculates its required charge power and complete step S401 to S403；
Step S401, if I2>Num2*Ie, then dump power module give the charging process service, and control module
Sending instruction makes it export rated power, then goes to S404；
Step S402, if (Num2-1) * Ie<I2≤Num2*Ie, then keep the grouping of power module original constant, then go to
S404；
Step S403, if (Num2-2) * Ie<I2≤(Num2-1)*Ie, then to improving the power module group in journey again
It is grouped, cuts out the last one module in current group, if low level-one priority has vehicle queue, put into low one
It is no then idle in the charging process of grade priority, then go to S404；
Step S404, according to the charge requirement that external end cell BMS is sent in current process, to the work(in current process
Rate module sends instruction, adjusts the output power of each module；
Step S5, still has power module remaining after being distributed if it is the above two-stage priority charging process or second is excellent
There is power module to cut out in first grade, then opens the charging process of third priority, until the charging process of lowest priority,
Step is consistent with S4.
Charging process repeats above step S3, S4 and S5.
If the charge requirement of all exterior terminal batteries is all met or is being filled without other exterior terminal batteries
Electricity, then all power modules cut out be in standby, wait for exterior terminal battery come to charge.When filling for highest priority
After electric process, charge port exits priority list, and other charging process priority move forward one successively.While according to
The step of S2, gives new highest priority charging process, i.e., the second original priority process to distribute charge power.
Claims (8)
1. a kind of DC charging plant capacity module switching at runtime system, which is characterized in that including control module, several power moulds
Block, several handover modules, switchover policy algoritic module；Wherein
Each handover module is electrically connected with several power modules,
Each power module is electrically connected with unique handover module,
Control module is connect with each power computation module and control module signal respectively,
Control module is electrically connected with each handover module,
Handover module and the electrical connection of each charge port；
The voltage and current requirement that switchover policy algoritic module is returned according to external charging terminal BMS, determines the grouping of power module
And charge power output；
One or more power modules are connected as terminal power supply with same exterior terminal battery；
Handover module power switched module becomes connecting with another exterior terminal battery from connecting with an exterior terminal battery；
Charging priority list is set in switchover policy algoritic module,
The sequence that exterior terminal battery obtains power module charging is recorded in charging priority list；
The Current Voltage requirement that control module is returned according to BMS, compares the idle available power of power module, generates distribution
The instruction of power module,
Control module sends the instruction of distribution power module to handover module.
2. system according to claim 1, which is characterized in that the generation process of the instruction of power module is：It is excellent by charging
First grade distributes power module, and the battery of upper level priority is according to its required charge power distribution power module, if having residue
Dump power module is cut out to the battery for distributing to next stage priority.
3. system according to claim 1, which is characterized in that each if the DC charging equipment is equipped with N number of charge port
Handover module includes 2N switching device, is connect respectively with each charge port；The output of each power module has two-way, respectively
OUT+ and OUT-；OUT+ and the OUT- output of power module need to pass through N number of switching device of handover module and N number of charge port respectively
Corresponding pole interface be connected.
4. system according to claim 1, which is characterized in that putting in order as exterior terminal in charging priority list
The sequencing that battery is connect with charging port；If multiple exterior terminal batteries are connected with charging port simultaneously, charging priority
Putting in order in list arranges from big to small according to the number of charging port；If the exterior terminal battery completion of high priority is filled
Electricity, the then automatic going up one level of vehicle priority of low priority.
5. a kind of DC charging plant capacity module dynamic switching method using system described in claim 1, which is characterized in that
Including：
Switchover policy algoritic module generates charging priority list；
The charge requirement that control module is returned according to the exterior terminal BMS of highest priority this moment is its distribution power module, protects
Demonstrate,prove its charge power；
Switchover policy the algoritic module relatively charge requirement of highest priority exterior terminal and power module this moment in real time it is fully loaded
Dump power module, is cut out the battery for distributing to next stage priority by output if having residue.
6. if according to the method described in claim 5, it is characterized in that, calculate the exterior terminal battery of upper level priority in real time
Charge requirement when dropping to a certain threshold value, reduce the distribution to its power module and improve the output of dump power module.
7. according to the method described in claim 6, it is characterized in that, if the charge power needed for all exterior terminal batteries obtains
The matching of power module is being charged without other exterior terminal batteries, then all power modules cut out are in standby shape
State.
8. according to the method described in claim 5, it is characterized in that, the determination method of charging priority is as follows：
The sequencing being connect with charging port for exterior terminal battery that puts in order of priority；If multiple exterior terminal batteries
It is connected simultaneously with charging port, putting in order for charging priority arranges from big to small according to the number of charging port；If Gao You
The exterior terminal battery of first grade completes charging, then the automatic going up one level of vehicle priority of low priority.
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| CN109435753A (en) * | 2018-12-14 | 2019-03-08 | 山东鲁能智能技术有限公司 | A kind of orderly charge control method, controller and system |
| CN110435471A (en) * | 2019-07-22 | 2019-11-12 | 宁波三星智能电气有限公司 | Power output control system, charge control system and the power output control method of charging pile |
| CN111251929A (en) * | 2020-02-21 | 2020-06-09 | 国网浙江省电力有限公司杭州供电公司 | Flexible power distribution method of modular direct current charging pile |
| CN111516539A (en) * | 2020-03-13 | 2020-08-11 | 南方电网电动汽车服务有限公司 | Power distribution method and device, and computer readable storage medium |
| CN112319298A (en) * | 2020-11-04 | 2021-02-05 | 四川光慧新能源科技有限公司 | Method for coordinating current distribution by multiple charging modules |
| CN112910024A (en) * | 2019-12-03 | 2021-06-04 | 国创新能源汽车智慧能源装备创新中心(江苏)有限公司 | Method and device for determining position of power module in charging pile and charging pile |
| CN113335083A (en) * | 2021-07-21 | 2021-09-03 | 东蒲联合科技(福建)有限责任公司 | Energy allocation method for range-extended electric cold-chain logistics vehicle and logistics vehicle |
| CN113949130A (en) * | 2021-10-23 | 2022-01-18 | 湖南省舟际智控电气科技有限公司 | Multi-port multi-protocol quick charger and method for intelligently distributing charging power |
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| CN112319298A (en) * | 2020-11-04 | 2021-02-05 | 四川光慧新能源科技有限公司 | Method for coordinating current distribution by multiple charging modules |
| CN113335083A (en) * | 2021-07-21 | 2021-09-03 | 东蒲联合科技(福建)有限责任公司 | Energy allocation method for range-extended electric cold-chain logistics vehicle and logistics vehicle |
| CN113949130A (en) * | 2021-10-23 | 2022-01-18 | 湖南省舟际智控电气科技有限公司 | Multi-port multi-protocol quick charger and method for intelligently distributing charging power |
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