CN109159675B - Matrix type flexible charging system, charging control method and device - Google Patents

Matrix type flexible charging system, charging control method and device Download PDF

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Publication number
CN109159675B
CN109159675B CN201811068208.1A CN201811068208A CN109159675B CN 109159675 B CN109159675 B CN 109159675B CN 201811068208 A CN201811068208 A CN 201811068208A CN 109159675 B CN109159675 B CN 109159675B
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power conversion
bus
charging
matrix
conversion module
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CN109159675A (en
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牛兴卓
曾奕彰
梁舒展
张黎鸿
洪金追
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SHENZHEN KEHUA TECHNOLOGY Co.,Ltd.
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SHENZHEN KEHUA HENGSHENG TECHNOLOGY Co Ltd
Xiamen Kehua Hengsheng Co Ltd
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    • H02J7/0027—
    • 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
    • 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
    • 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
    • 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 invention discloses a matrix type flexible charging system, a charging control method and a charging control device, wherein the system comprises: the charging system comprises a first preset number of power conversion modules, a second preset number of charging guns, a third preset number of bridging buses, a primary matrix and a secondary matrix; the power conversion module is connected with the primary matrix through controllable switches in the primary matrix, the number of the controllable switches in the primary matrix is the product of a first preset number and a third preset number, the jumper buses are connected with the charging guns through the controllable switches in the secondary matrix, and the number of the controllable switches in the secondary matrix is the product of the second preset number and the third preset number; according to the invention, through the arrangement of the controllable switches in the primary matrix and the secondary matrix, the average switch switching times and switching time can be reduced, the service life and reliability of the controllable switches are improved, and the user experience is improved in the process that the charging control device controls the charging of the battery by using the corresponding charging control method.

Description

Matrix type flexible charging system, charging control method and device
Technical Field
The invention relates to the technical field of charging, in particular to a matrix type flexible charging system, a charging control method and a charging control device.
Background
Along with the development of modern society science and technology, electric automobile's use is more and more extensive, and this just makes the setting that fills electric pile that charges for electric automobile receive people's attention more and more.
In the prior art, most charging pile manufacturers often use a pure ring topology or a pure matrix topology as shown in fig. 1, or use a small range of modifications on the topology to set up the charging pile. Under the condition that the number of the power conversion modules or the number of the output buses is small, the annular topological structure is clear, and the number of the used switches is small; however, when the number of power conversion modules or the number of output buses is large, the entire ring topology is complex, which is not favorable for production and is not favorable for modular processing. The pure matrix topology structure is clear, flexibility is strong, flexibility is high, modularization processing is easy to achieve, however, due to the fact that the number of switches is large, high cost is brought, and in order to guarantee that the power conversion modules are flexibly switched among different charging guns, a large number of switches are required to be switched every time. Although the existing companies propose to replace the contactor with the MOS transistor + the relay, which reduces the disadvantage of high production cost caused by the large number of switches, the disadvantage of the large number of switches cannot be avoided. When a large number of switches are switched, on one hand, due to the fact that the number of switching times of the switches is large, in a low-power switching mode (generally, the power required by a system is large when the switches are switched, and in order to reduce the power required when the switches are switched and reduce the design cost of the system, a successive switching method is generally adopted), the switching time is long; on the other hand, because a large number of switches need to be switched repeatedly, if the number of times of switching the switches is converted into the average number of times of switching each switch, the number of times of switching a single switch is large, and the service life and the reliability of the switch are greatly reduced.
Therefore, how to provide a structure of filling that the structure is clear, the flexibility is strong, and the flexibility is high and very easily modularization is handled reduces average switch and switches time, promotes user experience, is the problem that needs to solve now urgently.
Disclosure of Invention
The invention aims to provide a matrix type flexible charging system, a charging control method and a charging control device, so as to reduce average switch switching times and switching time and improve user experience.
In order to solve the above technical problem, the present invention provides a matrix type flexible charging system, including: the charging system comprises a first preset number of power conversion modules, a second preset number of charging guns, a third preset number of bridging buses, a primary matrix and a secondary matrix;
the crossover bus is connected with the power conversion module through controllable switches in the primary matrix, the number of the controllable switches in the primary matrix is the product of the first preset number and the third preset number, the crossover bus is connected with the charging gun through the controllable switches in the secondary matrix, the number of the controllable switches in the secondary matrix is the product of the second preset number and the third preset number, and the first preset number is larger than or equal to the second preset number.
Optionally, the system further comprises: a fourth preset number of directly connected buses;
each direct-connected bus comprises a controllable switch, two ends of each direct-connected bus are respectively connected with one corresponding power conversion module and one corresponding charging gun, and the fourth preset quantity is smaller than or equal to the second preset quantity.
Optionally, the fourth preset number is equal to the second preset number, and each charging gun is connected with one corresponding power conversion module one to one through a corresponding direct connection bus.
Optionally, the third preset number is specifically 1.
The invention also provides a charging control method, which is applied to the matrix type flexible charging system, and comprises the following steps:
acquiring the charging quantity of the power conversion modules required by the current charging gun;
judging whether the number of idle power conversion modules is greater than or equal to the charging number;
if yes, selecting an idle cross-over bus and the idle power conversion modules with the charging number, and respectively controlling corresponding controllable switches in the primary matrix and the secondary matrix to enable the selected cross-over bus to be respectively connected with the selected power conversion module and the current charging gun;
and after the current charging gun is charged, controlling the corresponding controllable switch in the secondary matrix to be switched off, and disconnecting the selected cross-over bus from the current charging gun.
Optionally, if there is a corresponding direct-connection bus between the current charging gun and the corresponding power conversion module, the selecting an idle crossover bus and the idle power conversion module of the charging number respectively controls the corresponding controllable switches in the primary matrix and the secondary matrix, so that before the selected crossover bus is connected with the selected power conversion module and the current charging gun, the method further includes:
judging whether the charging quantity is 1 or not;
if not, executing the step of selecting one vacant cross-over bus and the vacant power conversion modules with the charging number, respectively controlling the corresponding controllable switches in the primary matrix and the secondary matrix, and enabling the selected cross-over bus to be respectively connected with the selected power conversion module and the current charging gun;
if so, controlling the controllable switch in the direct-connected bus corresponding to the current charging gun to be switched on, and enabling the current charging gun to be connected with the corresponding power conversion module through the corresponding direct-connected bus.
Optionally, control controllable switch in the direct connection bus that current rifle that charges corresponds switches on, makes current rifle and the power conversion module that corresponds directly connect the bus through corresponding, include:
judging whether a power conversion module corresponding to the current charging gun is idle or not;
if so, controlling a controllable switch in a direct-connected bus corresponding to the current charging gun to be switched on, so that the current charging gun is connected with the corresponding power conversion module through the corresponding direct-connected bus;
optionally, the selecting one idle crossover bus and the idle power conversion modules of the charging number, respectively controlling corresponding controllable switches in the primary matrix and the secondary matrix, so that the selected crossover bus is respectively connected to the selected power conversion module and the current charging gun, includes:
judging whether preferred bridging buses with the number of connected idle power conversion modules equal to the charging number exist or not; wherein the preferred crossover bus bar is a selected free crossover bus bar;
if yes, controlling a corresponding controllable switch in the secondary matrix to be conducted, and enabling the optimal bridging bus with the number of any connected idle power conversion modules equal to the charging number to be connected with the current charging gun;
if not, selecting one preferred bridging bus and the idle power conversion module with the charging number according to the absolute value of the difference between the number of the idle power conversion modules connected with each preferred bridging bus and the charging number, and respectively controlling the corresponding controllable switches in the primary matrix and the secondary matrix to enable the selected preferred bridging bus to be respectively connected with the selected power conversion module and the current charging gun.
Optionally, the selecting one of the idle power conversion modules of the preferred jumper bus and the charging number according to an absolute value of a difference between the number of idle power conversion modules connected to each of the preferred jumper buses and the charging number includes:
judging whether the preferred bridging bus with the corresponding absolute value smaller than the charging number exists or not;
and if so, selecting the optimal crossover bus with the minimum corresponding absolute value, and selecting the idle power conversion modules with the charging number according to the idle power conversion modules connected with the optimal crossover bus with the minimum corresponding absolute value.
In addition, the present invention also provides a charge control device, including:
a memory for storing a computer program;
a processor for implementing the steps of the charging control method as claimed in any one of the above when executing the computer program.
The invention provides a matrix type flexible charging system, which comprises: the charging system comprises a first preset number of power conversion modules, a second preset number of charging guns, a third preset number of bridging buses, a primary matrix and a secondary matrix; the bridging bus is connected with the power conversion module through the controllable switches in the primary matrix, the number of the controllable switches in the primary matrix is the product of a first preset number and a third preset number, the bridging bus is connected with the charging gun through the controllable switches in the secondary matrix, the number of the controllable switches in the secondary matrix is the product of a second preset number and the third preset number, and the first preset number is larger than or equal to the second preset number;
therefore, through the arrangement of the controllable switches in the primary matrix and the secondary matrix, the average switching times and switching time can be reduced, the service life and the reliability of the controllable switches are improved, and the user experience is improved in the process that the charging control device controls the charging of the battery by using the corresponding charging control method. In addition, the invention also provides a charging control method and a charging control device, and the charging control method and the charging control device also have the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a pure matrix topology of a charging pile in the prior art;
fig. 2 is a structural diagram of a matrix flexible charging system according to an embodiment of the present invention;
fig. 3 is a schematic topology diagram of another matrix flexible charging system according to an embodiment of the present invention;
fig. 4 is a schematic topology diagram of another matrix flexible charging system according to an embodiment of the present invention;
fig. 5 is a flowchart of a charging control method according to an embodiment of the present invention;
fig. 6 is a flowchart of another charging control method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a structural diagram of a matrix flexible charging system according to an embodiment of the present invention. The system may include: a first preset number of power conversion modules 10, a second preset number of charging guns 20, a third preset number of jumper buses 30, a primary matrix 40, and a secondary matrix 50;
the crossover bus 30 is connected to the power conversion module 10 through the controllable switches in the primary matrix 40, the number of the controllable switches in the primary matrix 40 is the product of a first preset number and a third preset number, the crossover bus 30 is connected to the charging gun 20 through the controllable switches in the secondary matrix 50, the number of the controllable switches in the secondary matrix 50 is the product of a second preset number and a third preset number, and the first preset number is greater than or equal to the second preset number.
It is understood that the power conversion module 10 in this embodiment may be a device for converting ac power obtained from a system power source (e.g., a commercial power source) into dc power for charging, the charging gun 20 in this embodiment may be a device connected to a device to be charged, such as an electric vehicle, for charging a battery of the device to be charged, and the specific structures and types of the power conversion module 10 and the charging gun 20 may be set by a designer according to practical situations and user requirements, for example, the power conversion module may be set in a manner the same as or similar to that of the prior art, which is not limited in this embodiment.
It should be noted that the primary matrix 40 and the secondary matrix 50 in this embodiment may be both pure matrix topologies, as shown in fig. 2, a longitudinal bus led out from the power conversion module 10 (module) in the primary matrix 40 is connected to the transverse cross-over bus 30 through a crossed controllable switch; the secondary matrix 50 includes longitudinal busbars from the charging guns 20 connected to transverse crossover busbars 30 by intersecting controllable switches.
Correspondingly, for the specific number setting of the power conversion module 10 and the charging guns 20 in this embodiment, that is, the specific value setting of the first preset number and the second preset number, the setting can be set by the designer according to the practical scene and the user requirement, as long as the number of the power conversion module 10 is ensured to be greater than or equal to the number of the charging guns 20, the occurrence of the situation that all the charging guns 20 cannot be used at the same time is avoided, and this embodiment does not limit the setting.
Specifically, for example, 5 guns (charging guns 20) are output by 5 modules (power conversion modules 10), if gun 1 needs five module outputs at time T1, gun 2 needs five module outputs at time T2, and all modules at the charging start time and the charging end time are separated from all guns, when the pure matrix topology structure shown in fig. 1 is adopted, gun 1 needs five module outputs at time T1, at this time, switches 1, 2, 3, 4, and 5 need to be closed, assuming that one switch is closed for time ts, the total required time is 5ts, and the number of switching operations is 5 times; at time T2, gun 2 requires five module outputs, and at this time, switches 1, 2, 3, 4, and 5 need to be opened first, and switches 6, 7, 8, 9, and 10 need to be closed, which requires 10ts of time and 10 switching operations. After the charging is finished, the switches 6, 7, 8, 9 and 10 are switched off, the required time is 5ts, and the switching action frequency is 5 times; after the above process is completed, the total number of times and time of the switching operation are 20 times and 20ts, respectively. When the topology structure shown in fig. 3 provided by this embodiment is adopted, at time T1, gun 1 needs five module outputs, switches 1, 6, 11, 12, 21 in the primary matrix and switch 1 in the secondary matrix are closed, the action time is 6ts, and the action frequency is 6; at the time of T2, the gun 2 needs five module outputs, and only the switch 1 in the secondary matrix needs to be disconnected and the switch 6 needs to be closed, the action time is 2ts, and the action times are 2 times; after the charging is finished, the switch 6 in the secondary matrix is switched off, and the action time and the action times are respectively ts and 1; after the above process is finished, the total action time and the number of actions are 9ts and 9 times, respectively. It can be seen that the structure provided by this embodiment can save time and switching times of 11ts and 11 times compared to the pure matrix structure. The above is only a simple switching process, and in an actual charging process, the switching process is often more complex, so that the structure provided by this embodiment has very obvious advantages in switching time and switching times.
Further, in order to further reduce the average switching times and switching time of the system provided in this embodiment in the using process, as shown in fig. 2, the system provided in this embodiment may further include: a fourth preset number of directly connected buses 60; each direct-connected bus 60 comprises a controllable switch, two ends of each direct-connected bus 60 are respectively connected with one corresponding power conversion module 10 and one charging gun 20, and the fourth preset number is smaller than or equal to the second preset number.
That is to say, when the charging gun 20 needs only one power conversion module 10 for power supply, if the charging gun 20 has the corresponding direct-connection bus 60, the corresponding power conversion module 10 can be directly used for power supply by turning on the controllable switch in the direct-connection bus 60. The average switch switching times and switching time of the system provided by the embodiment in the using process are further reduced.
Specifically, the specific number setting of the direct-connected buses 60, that is, the specific numerical value setting of the fourth preset number, may be set by a designer according to a practical scene and a user requirement, and as shown in fig. 2, when one corresponding direct-connected bus 60 is set for each charging gun 20, the fourth preset number and the second preset number may be both N, that is, the fourth preset number and the second preset number may be equal; it is also possible to set a corresponding direct-connected bus 60 for each of the partial charging guns 20, i.e., the fourth predetermined number is smaller than the second predetermined number. The present embodiment does not set any limit to this.
Correspondingly, for the specific number setting of the crossover bus 30 in this embodiment, that is, the specific value setting of the third preset number, the designer can set the crossover bus 30 in the same number as the charging guns 20 according to the practical scene and the user requirement, so that the charging guns 20 can use the crossover bus 30 to obtain the power supply of the power conversion module 10 at the same time, that is, the fourth preset number may be equal to the second preset number; a larger number of jumper buses 30 than the number of charging guns 20 may also be provided to facilitate selection of jumper buses 30 of different connected power conversion modules 10, i.e., the fourth predetermined number may be greater than the second predetermined number; the number of the cross-over buses 30 can be smaller than that of the charging guns 20, as shown in fig. 4, the number of the cross-over buses 30 can be set to 1, so that the cost and the volume advantages are higher in a specific charging environment, for example, a bus station adopts single-gun maximum power wheel charging in the daytime, and the demand can be met at the fastest speed through the change of the controllable switches in the primary-secondary matrix; multiple guns are charged uniformly at night, and the requirement can be met through the direct-connected bus. The present embodiment does not set any limit to this.
Specifically, the specific type of the controllable switch in this embodiment may be selected by a designer according to a practical scenario and a user requirement, for example, the controllable switch may be set as a contactor, or may be set as a combination of an MOS transistor and a relay, and this embodiment does not limit this.
Correspondingly, the system provided by this embodiment may further include a charging control device for controlling the controllable switch in the system according to the corresponding charging control method.
In this embodiment, by setting the controllable switches in the primary matrix 40 and the secondary matrix 50, the average switching times and switching time of the switches can be reduced, the service life and reliability of the controllable switches are improved, and the user experience is improved in the process that the charging control device controls the charging of the battery by using the corresponding charging control method.
Based on the above embodiments, please refer to fig. 5, and fig. 5 is a flowchart of a charging control method according to an embodiment of the present invention. The method is applied to the matrix type flexible charging system provided by the embodiment, and may include:
step 101: and acquiring the charging quantity of the power conversion modules required by the current charging gun.
The current charging gun in this step may be a charging gun that needs to charge the connected battery at any current time in the matrix flexible charging system.
It is understood that the charging amount in this step may be the number of power conversion modules required by the current charging gun to charge the battery that needs to be charged currently. The specific manner in which the processor such as the CPU or the single chip microcomputer in this step obtains the charging amount may be set by the designer, or may be set in the same or similar manner as in the prior art, which is not limited in this embodiment.
Step 102: judging whether the number of the idle power conversion modules is larger than or equal to the charging number; if yes, go to step 103.
The purpose of this step may be to determine whether the current charging gun can be currently powered by the power conversion modules of the charging number by comparing the number of power conversion modules that do not power the charging gun with the charging number.
For the condition that the number of the idle power conversion modules in the step is smaller than the charging number, the number can be set by a designer according to a practical scene and user requirements, and if the charging of other charging guns is finished, the judgment of the step is carried out; or all the current idle power conversion modules can be used for supplying power to the current charging gun; the power conversion module used by other charging guns can be correspondingly adjusted. The present embodiment does not set any limit to this.
Step 103: and selecting an idle cross-over bus and the idle power conversion modules with the charging quantity, and respectively controlling the corresponding controllable switches in the primary matrix and the secondary matrix to enable the selected cross-over bus to be respectively connected with the selected power conversion modules and the current charging gun.
It will be appreciated that the purpose of this step may be to select a crossover bus from among previously unselected crossover buses and previously selected vacant crossover buses and to select a corresponding number of charging vacant power conversion modules to power the current charging gun using the crossover bus and the corresponding number of charging vacant power conversion modules.
Correspondingly, as the selected vacant cross-over bus has the conducted controllable switch in the primary matrix, namely, the selected vacant cross-over bus is connected with some vacant power conversion modules, if the cross-over bus selected by the current charging gun is the selected vacant cross-over bus, the switching action and time of the controllable switch in the primary matrix between the cross-over bus and the connected power conversion modules can be reduced, therefore, the selected vacant cross-over bus can be used as the preferable cross-over bus, and the preferable selection is convenient.
Specifically, the specific manner of selecting one vacant crossover bus and the vacant power conversion modules of the charging number in this step may be set by the designer according to the practical scenario and the user requirement, for example, the number of the vacant power conversion modules connected by each preferable crossover bus (the selected vacant crossover bus) and the charging number may be selected correspondingly. The present embodiment is not limited to this, as long as an empty crossover bus and an empty power conversion module with a charging amount can be selected.
It should be noted that, if the current rifle that charges can be connected through the direct bus that corresponds with the power conversion module that corresponds, can also include the step of judging whether the quantity of charging is 1 before this step, if not, then utilize idle cross-over connection bus to the current rifle power supply of charging through this step, if, then control the controllable switch that directly links in the bus that the current rifle that charges corresponds switches on, make current rifle and the power conversion module that corresponds directly link the bus connection through corresponding. Less switching actions and time of the controllable switches have been used.
Step 104: and after the current charging gun is charged, controlling the corresponding controllable switch in the secondary matrix to be switched off, and disconnecting the selected cross-over bus from the current charging gun.
It will be appreciated that the purpose of this step may be to disconnect the currently selected jumper bus from the current charging gun only by using the controllable switches in the secondary matrix after charging of the jumper bus is complete, with the jumper bus being the selected free jumper bus (preferably the jumper bus) to reduce the switching action and time of the controllable switches when the jumper bus is next selected.
Specifically, taking 5 modules (power conversion modules 10) outputting 5 guns (charging guns 20) as an example, when the topology structure shown in fig. 3 is adopted, gun 1 needs five module outputs at time T1, switches 1, 6, 11, 12 and 21 in the primary matrix and switch 1 in the secondary matrix are closed, and after charging is finished, switch 1 in the secondary matrix is opened; at time T2, gun 2 needs five module outputs, only switch 6 needs to be closed, and after charging is finished, switch 6 in the secondary matrix is opened; after the above process is finished, the total action time and the number of actions are 9ts and 9 times, respectively. The switching time and the switching times can be effectively reduced.
In the embodiment of the invention, after the charging of the current charging gun is completed, the corresponding controllable switch in the secondary matrix is controlled to be turned off, and the connection between the selected crossover bus and the current charging gun is disconnected, so that the average switch switching times and switching time can be reduced when the selected crossover bus is used for supplying power to the charging gun next time, the service life and the reliability of the controllable switch are prolonged, and the user experience is improved.
Based on the previous embodiment, please refer to fig. 6, and fig. 6 is a flowchart of another charging control method according to an embodiment of the present invention. The method can comprise the following steps:
step 201: and acquiring the charging quantity of the power conversion modules required by the current charging gun.
Step 202: judging whether the number of the idle power conversion modules is larger than or equal to the charging number; if yes, go to step 203.
Step 201 and step 202 are similar to step 101 and step 102, and are not described herein again.
Step 203: judging whether the charging quantity is 1 or not; if yes, go to step 204; if not, go to step 205.
It can be understood that, the purpose of this step is to determine whether to use the corresponding power conversion module to supply power to the current charging gun through the judgment of whether the charging number is 1 when the current charging gun can be connected with the corresponding power conversion module through the corresponding direct-connected bus.
It should be noted that this step may be performed after it is determined that the current charging gun may be connected to the corresponding power conversion module through the corresponding direct-connection bus, and this step may be directly performed when each charging gun in fig. 3 has the corresponding direct-connection bus and the corresponding power conversion module; if only part of the charging guns exist in the corresponding direct-connected bus and the corresponding power conversion module, a judging step of judging whether the current charging gun exists in the corresponding direct-connected bus and the corresponding power conversion module can be further included before the step, and if the current charging gun is a preset charging gun which exists in the corresponding direct-connected bus and the corresponding power conversion module, the judging step can be carried out; if yes, entering the step; if not, go to step 205. The present embodiment does not set any limit to this.
Step 204: and controlling the controllable switch in the direct-connected bus corresponding to the current charging gun to be switched on, so that the current charging gun is connected with the corresponding power conversion module through the corresponding direct-connected bus.
The purpose of this step may be to utilize the corresponding power conversion module to supply power to the current charging gun when the power conversion module that the current charging gun needs to use is 1 and the current charging gun has the corresponding power conversion module that can be connected through the direct-connected bus.
It can be understood that, before this step, a step of determining whether the power conversion module corresponding to the current charging gun is idle may also be included. If the charging gun is idle, the controllable switch in the direct-connected bus corresponding to the current charging gun can be directly controlled to be switched on, so that the current charging gun is connected with the corresponding power conversion module through the corresponding direct-connected bus. For the condition that the power conversion module corresponding to the current charging gun is not idle, the power conversion module can be set by a designer according to a practical scene and user requirements, for example, in order to avoid blocking of a bridging bus, when the number of bridging buses is smaller than that of the charging guns, the corresponding controllable switch in the primary matrix can be controlled, an idle power conversion module is selected to replace the power conversion module corresponding to the current charging gun, and the controllable switch in the direct-connected bus corresponding to the current charging gun is controlled to be switched on, so that the current charging gun is connected with the corresponding power conversion module through the corresponding direct-connected bus; in order to reduce the switching action and time of the controllable switch, when the number of the jumper buses is greater than or equal to the number of the charging guns, the process may also directly proceed to step 205, and the jumper buses are used to supply power to the current charging guns. The present embodiment does not set any limit to this.
Step 205: judging whether the optimal bridging buses with the number of connected idle power conversion modules equal to the charging number exist or not; if yes, go to step 206; if not, go to step 207.
The preferred jumper bus in this step is the selected free jumper bus.
It is to be understood that the purpose of this step may be to determine whether a preferred jumper bus having the same number of connected vacant power conversion modules as the number of charges can be selected by determining whether there is a preferred jumper bus having the same number of connected vacant power conversion modules as the number of charges.
Preferably, the number of connected free power conversion modules is equal to the number of charged power conversion modules, that is, the absolute value of the difference between the number of free power conversion modules connected to the jumper bus and the number of charged power conversion modules is 0.
Step 206: and controlling the corresponding controllable switches in the secondary matrix to be conducted, so that the optimal bridging buses with the number of any connected idle power conversion modules equal to the charging number are connected with the current charging gun.
In this step, only by turning on a corresponding controllable switch in the secondary matrix, the preferred crossover bus, which has the same number of connected idle power conversion modules as the number of charged power conversion modules, is connected to the current charging gun, so as to supply power to the current charging gun.
Step 207: and selecting an idle cross-over bus and the idle power conversion modules with the charging number according to the charging number and the absolute value of the difference between the number of the idle power conversion modules connected with each preferable cross-over bus and the charging number, and respectively controlling corresponding controllable switches in the primary matrix and the secondary matrix to enable the selected cross-over bus to be respectively connected with the selected power conversion modules and the current charging gun.
It is understood that the absolute value of the difference between the number of idle power conversion modules connected to each preferred jumper bus and the charging number in this step may be the number of times of switching the controllable switches required for each preferred jumper bus if the charging number of idle power conversion modules is connected, that is, the number of power conversion modules that need to be added or deleted.
It should be noted that, in this step, a specific manner of selecting one vacant cross-over bus and a vacant power conversion module of the charging number according to the absolute value of the difference between the charging number and the number of vacant power conversion modules connected to each preferable cross-over bus is that the cross-over bus having the smallest absolute value of the difference between the charging number and the number of vacant power conversion modules connected to each preferable cross-over bus is directly selected, and the power conversion module of the charging number is selected according to the vacant power conversion module connected to the cross-over bus, that is, the preferable cross-over bus having the smallest absolute value is selected, and the power conversion module of the charging number is selected according to the vacant power conversion module connected to the cross-over bus by correspondingly deleting or adding the vacant power conversion module; whether the preferred bridging buses with the corresponding absolute values smaller than the charging number exist can be judged, if yes, the preferred bridging bus with the smallest absolute value is selected, and the spare power conversion modules with the charging number are selected according to the spare power conversion modules connected with the preferred bridging buses with the smallest absolute values; if not, when the unselected vacant cross-over buses exist, one unselected vacant cross-over bus and the vacant power conversion modules with the charging quantity are selected. The present embodiment is not limited to this.
Specifically, for the matrix-type flexible charging system configured as shown in fig. 2, two switching manners including initial charging and alternate charging may be included. The initial charging means that a charging gun starts charging under the condition that the charging gun does not charge; alternate charging includes two cases: 1. the charging gun A is charging, the charging gun B starts charging midway, and the charging gun A still needs to be charged at the moment; 2. the charging gun A is charging, the halfway charging gun B starts charging, and the charging gun A stops charging at the moment. Taking the initial charging of the gun 1 (charging gun) as an example, under the condition that the charging gun 1 needs n (n is more than or equal to 2) and n modules (power conversion modules) are available, selecting an idle cross-over bus K from the cross-over buses, closing the controllable switches crossed by the n modules and the cross-over bus K in a primary matrix, then closing the controllable switches crossed by the gun 1 and the cross-over bus K in a secondary matrix, and finally starting the module, wherein the charging gun starts to charge. After charging, the controllable switch of the intersection of the gun 1 and the cross-over bus K in the secondary matrix is only needed to be disconnected. When the charging gun only needs 1 module and has 1 spare module, if the module is connected with the gun 1 through a direct connection bus, a controllable switch on the direct connection bus can be directly closed; if the modules are not connected, the modules can be dispatched to corresponding charging guns through the controllable switch combination in the primary and secondary matrixes, but the bridging buses can be blocked in such a way, and when the number of the bridging buses is smaller than that of the charging guns, the scheme is not recommended; the module connected with the gun 1 through the direct-connection bus in use can be withdrawn from the charging state firstly and then connected with the gun 1 through the direct-connection bus.
Taking alternate charging in which gun 1 is charging and gun 2 (charging gun) starts charging halfway as an example, case 1: when gun 2 starts charging, gun 1 stops charging. At this time, the number n of charging modules connected across the bus K at the moment of charging the gun 1 is first determined (n is more than or equal to 2). If n meets the gun 2 requirements, the crossover bus K can be connected directly to the gun 2 through a switch on the secondary matrix. If n does not satisfy the gun 2 requirement, the relationship between the number of modules n1 which need to be added (or deleted) on the crossover bus K and the number of modules n2 required by the gun 2 is judged. If n1 > n2, the jumper bus K1 is selected from the free jumper buses, and n2 free modules are selected, and are connected with the jumper bus K1 through the crossed controllable switches of the primary matrix, and then the jumper bus K1 is connected with the gun 2 through the crossed controllable switches of the secondary matrix; if n1 is not more than n2 or no vacant crossover bus exists, n1 connection modules can be directly added (or deleted) on the crossover bus K, and then the crossover bus K is connected with the gun 2 through the secondary matrix. Case 2: gun 1 still needs to be charged when gun 2 begins to be charged. First, according to the module power, the free cross-over bus K1 is selected, n3 free modules are connected to the cross-over bus K1 through the primary matrix (n3 may be less than or equal to n1, the number of modules depending on whether the remaining modules are sufficient) and the free cross-over bus K1 is connected to the gun 2 through the secondary matrix. The modules can be dispatched from one jumper bus to another jumper bus only when the power required on the rest jumper buses is insufficient and the power on the buses is excessive once the modules are connected to the jumper buses, otherwise the modules are not cut off from the jumper buses within the whole working time of the charging pile.
In the embodiment of the invention, when the corresponding power conversion module connected through the direct-connected bus exists in the current charging gun, the corresponding power conversion module is used for supplying power to the current charging gun, so that the average switch switching times and switching time are further reduced, the service life and reliability of the controllable switch are improved, and the user experience is improved.
In addition, an embodiment of the present invention further provides a charge control device, including: a memory for storing a computer program; a processor for implementing the steps of the charging control method provided in any of the above embodiments when executing the computer program.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The matrix type flexible charging system, the charging control method and the charging control device provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A matrix-type flexible charging system, comprising: the charging system comprises a first preset number of power conversion modules, a second preset number of charging guns, a third preset number of bridging buses, a primary matrix and a secondary matrix;
the crossover bus is connected with the power conversion module through controllable switches in the primary matrix, the number of the controllable switches in the primary matrix is the product of the first preset number and the third preset number, the crossover bus is connected with the charging gun through the controllable switches in the secondary matrix, the number of the controllable switches in the secondary matrix is the product of the second preset number and the third preset number, and the first preset number is larger than or equal to the second preset number.
2. The matrix-type flexible charging system of claim 1, further comprising: a fourth preset number of directly connected buses;
each direct-connected bus comprises a controllable switch, two ends of each direct-connected bus are respectively connected with one corresponding power conversion module and one corresponding charging gun, and the fourth preset quantity is smaller than or equal to the second preset quantity.
3. The matrix-type flexible charging system according to claim 2, wherein said fourth predetermined number is equal to said second predetermined number, and each of said charging guns is connected to a corresponding one of said power conversion modules through a corresponding one of said direct-connected buses.
4. A matrix-like flexible charging system according to claim 3, characterized in that said third predetermined number is in particular 1.
5. A charging control method for use in a matrix-type flexible charging system according to any one of claims 1 to 4, comprising:
acquiring the charging quantity of the power conversion modules required by the current charging gun;
judging whether the number of idle power conversion modules is greater than or equal to the charging number;
if so, selecting an idle power conversion module and an idle cross-over bus, and respectively controlling corresponding controllable switches in the primary matrix and the secondary matrix to enable the selected cross-over bus to be respectively connected with the selected power conversion module and the current charging gun; wherein the number of the selected power conversion modules is the charging number;
and after the current charging gun is charged, controlling the corresponding controllable switch in the secondary matrix to be switched off, and disconnecting the selected cross-over bus from the current charging gun.
6. The charging control method according to claim 5, wherein if there is a corresponding direct-connection bus between the current charging gun and the corresponding power conversion module, the selecting an idle power conversion module and an idle crossover bus to control corresponding controllable switches in the primary matrix and the secondary matrix, respectively, so that before the selected crossover bus is connected to the selected power conversion module and the current charging gun, the method further comprises:
judging whether the charging quantity is 1 or not;
if not, executing the selected idle power conversion module and an idle cross-over bus, and respectively controlling corresponding controllable switches in the primary matrix and the secondary matrix to enable the selected cross-over bus to be respectively connected with the selected power conversion module and the current charging gun;
if so, controlling the controllable switch in the direct-connected bus corresponding to the current charging gun to be switched on, and enabling the current charging gun to be connected with the corresponding power conversion module through the corresponding direct-connected bus.
7. The charging control method according to claim 6, wherein the controlling of the conduction of the controllable switch in the direct-connected bus corresponding to the current charging gun to connect the current charging gun and the corresponding power conversion module through the corresponding direct-connected bus comprises:
judging whether a power conversion module corresponding to the current charging gun is idle or not;
if so, controlling the controllable switch in the direct-connected bus corresponding to the current charging gun to be switched on, and enabling the current charging gun to be connected with the corresponding power conversion module through the corresponding direct-connected bus.
8. The method according to any one of claims 5 to 7, wherein the selecting an empty power conversion module and an empty crossover bus for controlling the corresponding controllable switches in the primary matrix and the secondary matrix, respectively, to connect the selected crossover bus to the selected power conversion module and the current charging gun, respectively, comprises:
judging whether a preferable bridging bus exists or not and the number of idle power conversion modules connected with the preferable bridging bus is equal to the charging number; wherein the preferred crossover bus bar is a selected free crossover bus bar;
if yes, controlling a corresponding controllable switch in the secondary matrix to be conducted, and enabling the optimal bridging bus with the number of any connected idle power conversion modules equal to the charging number to be connected with the current charging gun;
if not, selecting an idle power conversion module and an idle preferential bridging bus according to the absolute value of the difference between the number of idle power conversion modules connected with each preferential bridging bus and the charging number, and respectively controlling corresponding controllable switches in the primary matrix and the secondary matrix to enable the selected preferential bridging bus to be respectively connected with the selected power conversion module and the current charging gun; wherein the number of the selected power conversion modules is the charging number.
9. The charge control method of claim 8, wherein said selecting an empty power conversion module and one empty preferred jumper bus according to an absolute value of a difference between the number of empty power conversion modules connected per preferred jumper bus and the number of charges comprises:
judging whether the preferred bridging bus with the corresponding absolute value smaller than the charging number exists or not;
if so, selecting the optimal crossover bus with the minimum corresponding absolute value, and selecting an idle power conversion module according to the idle power conversion module connected with the optimal crossover bus with the minimum corresponding absolute value; wherein the number of the selected power conversion modules is the charging number.
10. A charge control device, characterized by comprising:
a memory for storing a computer program;
a processor for implementing the steps of the charge control method according to any one of claims 5 to 9 when executing said computer program.
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