CN113815466B - Charging pile output control method and device - Google Patents
Charging pile output control method and device Download PDFInfo
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- CN113815466B CN113815466B CN202111296434.7A CN202111296434A CN113815466B CN 113815466 B CN113815466 B CN 113815466B CN 202111296434 A CN202111296434 A CN 202111296434A CN 113815466 B CN113815466 B CN 113815466B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a charging pile output control method and device. Wherein the method comprises the following steps: acquiring first electric quantity demand information of a target vehicle; acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information. The application solves the technical problems that the output precision of the charging pile is difficult to control and the cost is increased when high-precision sampling equipment is introduced in the related technology.
Description
Technical Field
The application relates to the technical field of direct current charging piles, in particular to a charging pile output control method and device.
Background
For traditional direct current fills electric pile, its output accuracy, like output voltage, output current or output power's precision, rely on the output accuracy who fills electric pile inside power conversion module entirely, and the output accuracy who fills electric module again relies on the voltage current sampling of the inside single module that charges of module, when a plurality of parallelly connected output of charging module, the great problem of total output error can appear, causes the potential safety hazard. If high-precision voltage and current sampling is to be realized, high-precision sampling equipment is often required to be additionally installed, but hardware cost is increased.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides a charging pile output control method and device, which at least solve the technical problems that the output precision of a charging pile is difficult to control and the cost is increased when high-precision sampling equipment is introduced in the related technology.
According to an aspect of an embodiment of the present application, there is provided a charging pile output control method including: acquiring first electric quantity demand information of a target vehicle; acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
Optionally, determining first actual output electric quantity information of the target charging gun according to the first output electric quantity information and/or the second output electric quantity information; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information and the first actual output electric quantity information.
Optionally, detecting the working states of the first device and the second device; when the working state of the first equipment is normal and the working state of the second equipment is abnormal, determining the first actual output electric quantity information according to the first output electric quantity information; when the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining the first actual output electric quantity information according to the second output electric quantity information; and when the working state of the first equipment is normal and the working state of the second equipment is normal, carrying out weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining the first actual output electric quantity information according to the calculation result.
Optionally, the first actual output electric quantity of the target charging gun is the sum of the second actual output electric quantities of at least one power sub-module corresponding to the target charging gun, and the first electric quantity error information of the target charging gun is determined according to the first electric quantity demand information and the first actual output electric quantity information; the first electric quantity error information is regulated through a regulator to obtain a first regulation result, and the first regulation result is summed with the first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Optionally, the first actual output electric quantity of the target charging gun is the sum of the second actual output electric quantities of at least one power sub-module corresponding to the target charging gun, and for any power sub-module, determining second electric quantity error information of the power sub-module according to the first electric quantity requirement information and the first actual output electric quantity information, and determining second electric quantity requirement information of the power sub-module; adjusting the second electric quantity error information through an adjuster to obtain a second adjustment result, and summing the second adjustment result and the second electric quantity demand information to obtain a second target output electric quantity of the power sub-module; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Optionally, for any one of the power sub-modules, acquiring the second actual output electric quantity of the power sub-module; determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and the second target output electric quantity of the power sub-module; and regulating the third electric quantity error information through a regulator to obtain a third regulation result, and regulating the second actual output electric quantity of the power sub-module according to the third regulation result.
Optionally, establishing a communication connection with the target vehicle; acquiring the first electric quantity demand information sent by the target vehicle, wherein the first electric quantity demand information at least comprises one of the following: voltage demand information, current demand information, power demand information.
Optionally, the first device is a main controller in the charging pile, and the second device is an ammeter in the charging pile.
According to another aspect of the embodiment of the present application, there is also provided a charging pile output control device, including: the first acquisition module is used for acquiring first electric quantity demand information of the target vehicle; the second acquisition module is used for acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle; and the determining module is used for adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
According to another aspect of the embodiment of the present application, there is further provided a nonvolatile storage medium, where the nonvolatile storage medium includes a stored program, and when the program runs, the device where the nonvolatile storage medium is controlled to execute the above-mentioned charging pile output control method.
In the embodiment of the application, first electric quantity demand information of a target vehicle is firstly obtained, then first output electric quantity information of a target charging gun is obtained through first equipment in a charging pile, and/or second output electric quantity information of the target charging gun is obtained through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information. In the process, the output voltage and the current of the charging gun are directly sampled through the first equipment and/or the second equipment integrated in the charging pile, so that additional cost of other hardware is not required; the sampling result is directly or indirectly used as a feedback signal, the output electric quantity of each power sub-module is adjusted by combining the first electric quantity demand information, and the output precision of each power sub-module can be improved, so that the output precision of the whole pile is improved, and the technical problem that the output precision of a charging pile in the related technology is difficult to control, and the cost is increased when high-precision sampling equipment is introduced is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a flowchart of a charging pile output control method according to an embodiment of the present application;
fig. 2 is a schematic structural view of a dc charging pile according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a charging pile power module error compensation according to an embodiment of the present application;
FIG. 4 is a schematic diagram of another power module error compensation for a charging pile according to an embodiment of the present application;
fig. 5 is a schematic structural view of a charging pile output control device according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present application, there is provided a charging pile output control method, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different from that herein.
Fig. 1 is a schematic flow chart of an alternative output control method of a charging pile according to an embodiment of the present application, as shown in fig. 1, the method at least includes steps S102-S106, wherein:
step S102, obtaining first power demand information of a target vehicle.
Specifically, the charging pile first establishes communication connection with the target vehicle, and then acquires first electric quantity demand information sent by the target vehicle, where the first electric quantity demand information generally includes at least one of the following: voltage demand information, current demand information, power demand information. The charging pile in the embodiment of the application is mainly a direct-current charging pile, and after a target vehicle to be charged is connected with the charging pile, information such as voltage, current or power required during charging is sent to the charging pile, and the charging pile outputs corresponding voltage, current or power.
Step S104, obtaining first output electric quantity information of a target charging gun through first equipment in the charging pile, and/or obtaining second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle.
In some alternative embodiments of the present application, the first device is a main controller in a charging pile, and the second device is an electric meter in the charging pile. Of course, the first device and the second device may be other devices integrated in the charging pile and capable of acquiring the output power information of the target charging gun, which are not particularly limited herein.
Fig. 2 shows an alternative direct current charging pile with a double-gun structure, wherein the charging pile comprises an input switch, a power module, a power distribution switch combination, a main controller, an ammeter, a charging gun A and a charging gun B, solid lines in the figure represent power buses, and broken lines represent communication buses. In general, the power module includes at least one power sub-module, and after the output power of the power sub-module is distributed by the power distribution switch combination, the vehicle to be charged is charged through the charging gun.
In the related art, the final output precision of the charging gun, such as the precision of output voltage, output current or output power, is completely dependent on the output precision of the power module, but the output precision of the power module is also dependent on the voltage and current sampling inside each power sub-module, the sampling precision is lower, and when a plurality of power sub-modules are output in parallel, the total output error is larger, so that the actual output precision of the charging gun is difficult to meet the user requirement.
In order to solve the above-mentioned problems, an embodiment of the present application proposes to collect, by a first device and/or a second device in a charging pile, output power information of a charging gun, the output power information mainly including an output voltage and an output current. Specifically, as shown in fig. 2, the output voltage and the output current of the charging gun are respectively and independently sampled through the main controller and the ammeter, wherein the sampling process of the main controller is faster, the sampling precision of the ammeter is higher, the main controller and the ammeter can both acquire the total voltage and the total current actually output by the charging gun, the sampling results of the main controller and the ammeter are singly or jointly processed to serve as the feedback value actually output by the charging gun, and the output voltage, the current or the power of each power sub-module is adjusted based on the error compensation principle, so that the output precision of each power sub-module can be improved, and the overall output precision of the charging gun is improved. Meanwhile, other high-precision sampling equipment is not required to be introduced in the process, so that the hardware cost is further saved.
Step S106, the first actual output electric quantity of the target charging gun is adjusted according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
Specifically, when the first actual output electric quantity of the target charging gun is adjusted based on the error compensation principle, the first actual output electric quantity information of the target charging gun can be determined according to the first output electric quantity information acquired by the first equipment and/or the second output electric quantity information acquired by the second equipment.
In some alternative embodiments of the present application, the operating states of the first device and the second device may be detected first. For example, detecting whether the first device or the second device collects the output voltage and current of the charging gun, and if the collection result is not obtained, indicating that the working state of the first device or the second device is abnormal; after the acquisition result is obtained, whether the acquisition result is in a reasonable range or not can be further judged, and if the acquisition result is not in the reasonable range, the abnormal working state of the first equipment or the second equipment is indicated; and if the acquisition result is in a reasonable range, the working state of the first equipment or the second equipment is considered to be normal.
Specifically, when the working state of the first equipment is normal and the working state of the second equipment is abnormal, determining first actual output electric quantity information according to the first output electric quantity information; when the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining first actual output electric quantity information according to the second output electric quantity information; when the working state of the first equipment is normal and the working state of the second equipment is normal, carrying out weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining the first actual output electric quantity information according to the calculation result. The value range of the preset weight coefficient is between 0 and 1, and can be specifically set according to the sampling precision of the actual first equipment and the actual second equipment.
It can be understood that by judging the working states of the first device and the second device, when one of the two devices has sampling failure or sampling precision error is larger, the sampling result of the other device can be adopted to perform subsequent output electric quantity adjustment, so that the robustness of the charging pile output system is improved while the error of the calculation result is avoided being larger. Of course, when both are normal, the user may also use only one of the devices to perform acquisition, or set the weight coefficient of the acquisition result of one device to 0, and use only the acquisition result of the other device to perform subsequent adjustment.
And then, according to the first electric quantity demand information and the first actual output electric quantity information, adjusting the first actual output electric quantity of the target charging gun based on an error compensation principle. As can be seen from the above, the first actual output power of the target charging gun is the sum of the second actual output power of the at least one power sub-module corresponding to the target charging gun, so the following two alternative ways are provided in the embodiments of the present application when error compensation is implemented.
In a first way, the first device determines the compensated total voltage or total current or total power, that is, determines the first target output electric quantity of the target charging gun, and then equally distributes the first target output electric quantity to at least one corresponding power sub-module, and the first target output electric quantity is delivered to a fixed voltage or a given current or a given power for each power sub-module again, that is, determines the second target output electric quantity of each power sub-module, and the output voltage or current or power of each power sub-module is regulated by each power sub-module.
Specifically, the first electric quantity error information of the target charging gun can be determined according to the first electric quantity demand information and the first actual output electric quantity information; the first electric quantity error information is regulated through a regulator to obtain a first regulation result, and the first regulation result is summed with first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Taking the adjustment of the output current of the charging gun a as an example, as shown in fig. 3, the current output current (first output power information) of the charging gun a obtained by the first device is i A1 The second device obtains the current output (second output power information) of the charging gun A as i A2 If the preset weight coefficient is K, determining that the current actual output current (first actual output electric quantity information) of the charging gun A is i A ＝Ki A1 +(1-K)i A2 The current (first electricity demand information) requested to be output by the vehicle is i A_ref The difference between the two can obtain the error current (first electric quantity error information) as i A_err ＝i A_ref -i A The method comprises the steps of carrying out a first treatment on the surface of the Error current i by PI (proportional integral) regulator A_err After the treatmentThen to the request current i A_ref Summing to obtain a compensated total current (first target output power) i A_ref * The method comprises the steps of carrying out a first treatment on the surface of the Assuming that the charging gun A corresponds to n (n is greater than or equal to 1) power sub-modules, the total given current i can be A_ref * Equally divided into the n power sub-modules, i.e. determining the new given current (second target output power) of each power sub-module asThen, each power submodule adjusts the actual output current (the second actual output electric quantity) according to the new given current, and the precision control of the output current of the charging gun A can be realized.
It will be appreciated that the output voltage is regulated in the same way as the output current, and that in regulating the input power, it is necessary to collect both voltage and current, from which the corresponding power is determined.
When the second actual output electric quantity of each power sub-module is adjusted according to the second target output electric quantity of each power sub-module, acquiring the second actual output electric quantity of each power sub-module for any power sub-module; determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and the second target output electric quantity of the power sub-module; and regulating the third electric quantity error information through a regulator to obtain a third regulation result, and regulating the second actual output electric quantity of the power sub-module according to the third regulation result.
Taking the output current of the power sub-module 1 as an example, as shown in fig. 3, the given current (second target output power) of the power sub-module 1 is i 1_ref Acquiring the current output current (second actual output electric quantity) as i 1 The difference between the two can obtain the error current (third electric quantity error information) as i 1_err * ＝i 1_ref -i 1 The method comprises the steps of carrying out a first treatment on the surface of the Error current i through PI regulator 1_err * After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to realize the output current (the second actual output electric quantity) of the power sub-module 1) And adjusting.
In the second mode, the first device directly transmits the current actual output voltage or current or power (i.e. the first actual output electric quantity information) and the voltage or current or power requested by the vehicle (i.e. the first electric quantity demand information) to the corresponding at least one power sub-module, and each power sub-module calculates the voltage or current to be compensated by itself.
Specifically, for any power sub-module, determining second electric quantity error information of the power sub-module according to the first electric quantity demand information and the first actual output electric quantity information, and determining second electric quantity demand information of the power sub-module; adjusting the second electric quantity error information through the regulator to obtain a second adjustment result, and summing the second adjustment result and second electric quantity demand information to obtain a second target output electric quantity of the power sub-module; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Still taking the adjustment of the output current of the charging gun a as an example, as shown in fig. 4, the current output current (first output power information) of the charging gun a obtained by the first device is i A1 The second device obtains the current output (second output power information) of the charging gun A as i A2 If the preset weight coefficient is K, determining that the current actual output current (first actual output electric quantity information) of the charging gun A is i A ＝Ki A1 +(1-K)i A2 The current (first electricity demand information) requested to be output by the vehicle is i A_ref The actual output current i is transmitted through the communication bus A And request current i A_ref And transmitting the power to n (n is more than or equal to 1) power sub-modules corresponding to the charging gun A.
For the n power sub-modules, taking power sub-module 1 as an example, first determine its initial given current (second power demand information) asIts error current (second power error information)/(error current)> Error current i through PI regulator 1_err After processing, the current is matched with the initial given current i 1_ref Summing to obtain a compensated given current (second target output power) of i 1_ref * The method comprises the steps of carrying out a first treatment on the surface of the Then the current output current (the second actual output electric quantity) is obtained as i 1 The difference between the two can obtain the error current (third electric quantity error information) as i 1_err * ＝i 1_ref * -i 1 The method comprises the steps of carrying out a first treatment on the surface of the Error current i through PI regulator 1_err * After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to realize the adjustment of the output current (second actual output electric quantity) of the power sub-module 1.
The regulator used in fig. 3 and 4 is a PI regulator, which is merely an example and not limited thereto, and a PID (proportional integral derivative) regulator or other regulator may be used to process the electric quantity error information during the actual adjustment.
In the embodiment of the application, first electric quantity demand information of a target vehicle is firstly obtained, then first output electric quantity information of a target charging gun is obtained through first equipment in a charging pile, and/or second output electric quantity information of the target charging gun is obtained through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information. In the process, the output voltage and the current of the charging gun are directly sampled through the first equipment and/or the second equipment integrated in the charging pile, so that additional cost of other hardware is not required; the sampling result is directly or indirectly used as a feedback signal, the output electric quantity of each power sub-module is adjusted by combining the first electric quantity demand information, and the output precision of each power sub-module can be improved, so that the output precision of the whole pile is improved, and the technical problem that the output precision of a charging pile in the related technology is difficult to control, and the cost is increased when high-precision sampling equipment is introduced is solved.
Example 2
According to an embodiment of the present application, there is further provided a charging pile output control apparatus for implementing the above-mentioned charging pile output control method, as shown in fig. 5, the apparatus at least includes a first obtaining module 50, a second obtaining module 52, and a determining module 54, where:
the first acquiring module 50 is configured to acquire first power demand information of the target vehicle.
Specifically, the charging pile first establishes communication connection with the target vehicle, and then acquires first electric quantity demand information sent by the target vehicle, where the first electric quantity demand information generally includes at least one of the following: voltage demand information, current demand information, power demand information. The charging pile in the embodiment of the application is mainly a direct-current charging pile, and after a target vehicle to be charged is connected with the charging pile, information such as voltage, current or power required during charging is sent to the charging pile, and the charging pile outputs corresponding voltage, current or power.
The second obtaining module 52 is configured to obtain, by using a first device in the charging pile, first output power information of the target charging gun, and/or obtain, by using a second device in the charging pile, second output power information of the target charging gun, where the target charging gun is used to charge the target vehicle.
In some alternative embodiments of the present application, the first device is a main controller in a charging pile, and the second device is an electric meter in the charging pile. Of course, the first device and the second device may be other devices integrated in the charging pile and capable of acquiring the output power information of the target charging gun, which are not particularly limited herein.
In the related art, the final output precision of the charging gun, such as the precision of output voltage, output current or output power, is completely dependent on the output precision of the power module, but the output precision of the power module is also dependent on the voltage and current sampling inside each power sub-module, the sampling precision is lower, and when a plurality of power sub-modules are output in parallel, the total output error is larger, so that the actual output precision of the charging gun is difficult to meet the user requirement.
In order to solve the above-mentioned problems, an embodiment of the present application proposes to collect, by a first device and/or a second device in a charging pile, output power information of a charging gun, the output power information mainly including an output voltage and an output current. Specifically, as shown in fig. 2, the output voltage and the output current of the charging gun are respectively and independently sampled through the main controller and the ammeter, wherein the sampling process of the main controller is faster, the sampling precision of the ammeter is higher, the main controller and the ammeter can both acquire the total voltage and the total current actually output by the charging gun, the sampling results of the main controller and the ammeter are singly or jointly processed to serve as the feedback value actually output by the charging gun, and the output voltage, the current or the power of each power sub-module is adjusted based on the error compensation principle, so that the output precision of each power sub-module can be improved, and the overall output precision of the charging gun is improved. Meanwhile, other high-precision sampling equipment is not required to be introduced in the process, so that the hardware cost is further saved.
The determining module 54 is configured to adjust the first actual output power of the target charging gun according to the first power demand information, the first output power information, and/or the second output power information.
Specifically, when the first actual output electric quantity of the target charging gun is adjusted based on the error compensation principle, the first actual output electric quantity information of the target charging gun can be determined according to the first output electric quantity information acquired by the first equipment and/or the second output electric quantity information acquired by the second equipment.
In some alternative embodiments of the present application, the operating states of the first device and the second device may be detected first. For example, detecting whether the first device or the second device collects the output voltage and current of the charging gun, and if the collection result is not obtained, indicating that the working state of the first device or the second device is abnormal; after the acquisition result is obtained, whether the acquisition result is in a reasonable range or not can be further judged, and if the acquisition result is not in the reasonable range, the abnormal working state of the first equipment or the second equipment is indicated; and if the acquisition result is in a reasonable range, the working state of the first equipment or the second equipment is considered to be normal.
Specifically, when the working state of the first equipment is normal and the working state of the second equipment is abnormal, determining first actual output electric quantity information according to the first output electric quantity information; when the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining first actual output electric quantity information according to the second output electric quantity information; when the working state of the first equipment is normal and the working state of the second equipment is normal, carrying out weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining the first actual output electric quantity information according to the calculation result. The value range of the preset weight coefficient is between 0 and 1, and can be specifically set according to the sampling precision of the actual first equipment and the actual second equipment.
It can be understood that by judging the working states of the first device and the second device, when one of the two devices has sampling failure or sampling precision error is larger, the sampling result of the other device can be adopted to perform subsequent output electric quantity adjustment, so that the robustness of the charging pile output system is improved while the error of the calculation result is avoided being larger. Of course, when both are normal, the user may also use only one of the devices to perform acquisition, or set the weight coefficient of the acquisition result of one device to 0, and use only the acquisition result of the other device to perform subsequent adjustment.
And then, according to the first electric quantity demand information and the first actual output electric quantity information, adjusting the first actual output electric quantity of the target charging gun based on an error compensation principle. As can be seen from the above, the first actual output power of the target charging gun is the sum of the second actual output power of the at least one power sub-module corresponding to the target charging gun, so the following two alternative ways are provided in the embodiments of the present application when error compensation is implemented.
In a first way, the first device determines the compensated total voltage or total current or total power, that is, determines the first target output electric quantity of the target charging gun, and then equally distributes the first target output electric quantity to at least one corresponding power sub-module, and the first target output electric quantity is delivered to a fixed voltage or a given current or a given power for each power sub-module again, that is, determines the second target output electric quantity of each power sub-module, and the output voltage or current or power of each power sub-module is regulated by each power sub-module.
Specifically, the first electric quantity error information of the target charging gun can be determined according to the first electric quantity demand information and the first actual output electric quantity information; the first electric quantity error information is regulated through a regulator to obtain a first regulation result, and the first regulation result is summed with first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Taking the adjustment of the output current of the charging gun a as an example, as shown in fig. 3, the current output current (first output power information) of the charging gun a obtained by the first device is i A1 The second device obtains the current output (second output power information) of the charging gun A as i A2 If the preset weight coefficient is K, determining that the current actual output current (first actual output electric quantity information) of the charging gun A is i A ＝Ki A1 +(1-K)i A2 The current (first electricity demand information) requested to be output by the vehicle is i A_ref The difference between the two can obtain the error current (first electric quantity error information) as i A_err ＝i A_ref -i A The method comprises the steps of carrying out a first treatment on the surface of the Error current i by PI (proportional integral) regulator A_err After processing, the current is matched with the request current i A_ref Summing to obtain a compensated total current (first target output power) i A_ref * The method comprises the steps of carrying out a first treatment on the surface of the Assuming that the charging gun A corresponds to n (n is greater than or equal to 1) power sub-modules, the total given current i can be A_ref * Equally divided into the n power sub-modules, i.e. determining the new given current (second target output power) of each power sub-module asThereafter, each power sub-module is dependent on the new given powerThe current is used for adjusting the actual output current (the second actual output electric quantity), so that the precision control of the output current of the charging gun A can be realized.
It will be appreciated that the output voltage is regulated in the same way as the output current, and that in regulating the input power, it is necessary to collect both voltage and current, from which the corresponding power is determined.
When the second actual output electric quantity of each power sub-module is adjusted according to the second target output electric quantity of each power sub-module, acquiring the second actual output electric quantity of each power sub-module for any power sub-module; determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and the second target output electric quantity of the power sub-module; and regulating the third electric quantity error information through a regulator to obtain a third regulation result, and regulating the second actual output electric quantity of the power sub-module according to the third regulation result.
Taking the output current of the power sub-module 1 as an example, as shown in fig. 3, the given current (second target output power) of the power sub-module 1 is i 1_ref Acquiring the current output current (second actual output electric quantity) as i 1 The difference between the two can obtain the error current (third electric quantity error information) as i 1_err * ＝i 1_ref -i 1 The method comprises the steps of carrying out a first treatment on the surface of the Error current i through PI regulator 1_err * After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to realize the adjustment of the output current (second actual output electric quantity) of the power sub-module 1.
In the second mode, the first device directly transmits the current actual output voltage or current or power (i.e. the first actual output electric quantity information) and the voltage or current or power requested by the vehicle (i.e. the first electric quantity demand information) to the corresponding at least one power sub-module, and each power sub-module calculates the voltage or current to be compensated by itself.
Specifically, for any power sub-module, determining second electric quantity error information of the power sub-module according to the first electric quantity demand information and the first actual output electric quantity information, and determining second electric quantity demand information of the power sub-module; adjusting the second electric quantity error information through the regulator to obtain a second adjustment result, and summing the second adjustment result and second electric quantity demand information to obtain a second target output electric quantity of the power sub-module; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Still taking the adjustment of the output current of the charging gun a as an example, as shown in fig. 4, the current output current (first output power information) of the charging gun a obtained by the first device is i A1 The second device obtains the current output (second output power information) of the charging gun A as i A2 If the preset weight coefficient is K, determining that the current actual output current (first actual output electric quantity information) of the charging gun A is i A ＝Ki A1 +(1-K)i A2 The current (first electricity demand information) requested to be output by the vehicle is i A_ref The actual output current i is transmitted through the communication bus A And request current i A_ref And transmitting the power to n (n is more than or equal to 1) power sub-modules corresponding to the charging gun A.
For the n power sub-modules, taking power sub-module 1 as an example, first determine its initial given current (second power demand information) asIts error current (second power error information)/(error current)> Error current i through PI regulator 1_err After processing, the current is matched with the initial given current i 1_ref Summing to obtain a compensated given current (second target output power) of i 1_ref * The method comprises the steps of carrying out a first treatment on the surface of the Then the current output current (the second actual output electric quantity) is obtained as i 1 The difference between the two can obtain the error current (third electric quantity error information) as i 1_err * ＝i 1_ref * -i 1 The method comprises the steps of carrying out a first treatment on the surface of the Error current i through PI regulator 1_err * After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to realize the adjustment of the output current (second actual output electric quantity) of the power sub-module 1.
The regulator used in fig. 3 and 4 is a PI regulator, which is merely an example and not limited thereto, and a PID (proportional integral derivative) regulator or other regulator may be used to process the electric quantity error information during the actual adjustment.
It should be noted that, each module in the charging pile output control device in the embodiment of the present application corresponds to the implementation steps of the charging pile output control method in embodiment 1 one by one, and since the embodiment 1 has been described in detail, some details not shown in the embodiment may refer to embodiment 1, and will not be described in detail here.
Example 3
According to an embodiment of the present application, there is also provided a nonvolatile storage medium including a stored program, where the device in which the nonvolatile storage medium is controlled to execute the above-described charging pile output control method when the program runs.
Specifically, when the program runs, the device where the nonvolatile storage medium is controlled to execute the following steps: acquiring first electric quantity demand information of a target vehicle; acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of units may be a logic function division, and there may be another division manner in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (7)
1. A charging pile output control method, characterized by comprising:
acquiring first electric quantity demand information of a target vehicle;
acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle;
adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information, wherein the first actual output electric quantity of the target charging gun is the sum of the second actual output electric quantities of at least one power sub-module corresponding to the target charging gun;
the adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information comprises the following steps: determining first actual output electric quantity information of the target charging gun according to the first output electric quantity information and/or the second output electric quantity information; determining first electric quantity error information of the target charging gun according to the first electric quantity demand information and the first actual output electric quantity information; the first electric quantity error information is regulated through a regulator to obtain a first regulation result, and the first regulation result is summed with the first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module;
Or determining first actual output electric quantity information of the target charging gun according to the first output electric quantity information and/or the second output electric quantity information; for any power sub-module, determining second electric quantity error information of the power sub-module according to the first electric quantity demand information and the first actual output electric quantity information, and determining second electric quantity demand information of the power sub-module; adjusting the second electric quantity error information through an adjuster to obtain a second adjustment result, and summing the second adjustment result and the second electric quantity demand information to obtain a second target output electric quantity of the power sub-module; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
2. The method of claim 1, wherein determining first actual output power information of the target charging gun from the first output power information and/or the second output power information comprises:
detecting working states of the first equipment and the second equipment;
when the working state of the first equipment is normal and the working state of the second equipment is abnormal, determining the first actual output electric quantity information according to the first output electric quantity information;
When the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining the first actual output electric quantity information according to the second output electric quantity information;
and when the working state of the first equipment is normal and the working state of the second equipment is normal, carrying out weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining the first actual output electric quantity information according to the calculation result.
3. The method of claim 1, wherein adjusting the second actual output power of the power sub-module in accordance with the second target output power of the power sub-module comprises:
for any power sub-module, acquiring the second actual output electric quantity of the power sub-module;
determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and the second target output electric quantity of the power sub-module;
and regulating the third electric quantity error information through a regulator to obtain a third regulation result, and regulating the second actual output electric quantity of the power sub-module according to the third regulation result.
4. The method of claim 1, wherein obtaining first power demand information for the target vehicle comprises:
establishing a communication connection with the target vehicle;
acquiring the first electric quantity demand information sent by the target vehicle, wherein the first electric quantity demand information at least comprises one of the following: voltage demand information, current demand information, power demand information.
5. The method of claim 1, wherein the first device is a master controller in the charging stake and the second device is an electricity meter in the charging stake.
6. A charging pile output control device, characterized by comprising:
the first acquisition module is used for acquiring first electric quantity demand information of the target vehicle;
the second acquisition module is used for acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle;
the determining module is used for adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information, wherein the first actual output electric quantity of the target charging gun is the sum of the second actual output electric quantities of at least one power sub-module corresponding to the target charging gun;
According to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information, the first actual output electric quantity of the target charging gun is adjusted, including: determining first actual output electric quantity information of the target charging gun according to the first output electric quantity information and/or the second output electric quantity information; determining first electric quantity error information of the target charging gun according to the first electric quantity demand information and the first actual output electric quantity information; the first electric quantity error information is regulated through a regulator to obtain a first regulation result, and the first regulation result is summed with the first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module;
or determining first actual output electric quantity information of the target charging gun according to the first output electric quantity information and/or the second output electric quantity information; for any power sub-module, determining second electric quantity error information of the power sub-module according to the first electric quantity demand information and the first actual output electric quantity information, and determining second electric quantity demand information of the power sub-module; adjusting the second electric quantity error information through an adjuster to obtain a second adjustment result, and summing the second adjustment result and the second electric quantity demand information to obtain a second target output electric quantity of the power sub-module; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
7. A nonvolatile storage medium, characterized in that the nonvolatile storage medium includes a stored program, wherein the program, when run, controls a device in which the nonvolatile storage medium is located to execute the charging pile output control method according to any one of claims 1 to 5.
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