CN107508335B - Current limiting method and device of charging equipment - Google Patents
Current limiting method and device of charging equipment Download PDFInfo
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- H02J7/0077—
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
- Y02T10/70—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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- 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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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a current limiting method and a current limiting device of charging equipment, wherein the current limiting method of the charging equipment comprises the following steps: acquiring an input current actual value of the charging equipment; subtracting the actual value of the input current from the upper limit current value of the charging equipment to obtain an error signal; adjusting the error signal to obtain an adjustment signal; and adding the charging current set value of the charged equipment and the adjusting signal to obtain a sum as a new charging current set value of the charged equipment. In the embodiment of the invention, the charging current set value of the charged equipment, such as a vehicle-mounted battery, is adjusted according to the error signal between the upper limit current value and the input current actual value of the charging equipment, such as a vehicle-mounted charger, so that the adjustment of the input current actual value of the charging equipment is realized, the input current actual value is stabilized near the upper limit current value of the charging equipment, and the performance of the charging equipment is improved.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a current limiting method and device of charging equipment.
Background
Fig. 1 is a schematic structural diagram of a charging system of an electric vehicle in the prior art, and as shown in fig. 1, the electric vehicle is charged through a charging pile, a vehicle-mounted charger, and a vehicle-mounted battery, and energy of a power grid is transferred to the vehicle-mounted battery.
However, the power level of the charging post is often different from the power level of the on-board charger, e.g., case 1): the upper limit of the alternating current output by the charging pile is 32A, the upper limit of the alternating current input by the vehicle-mounted charger is 16A, and at the moment, the input current of the vehicle-mounted charger is required to be not more than 16A; case 2) the upper limit of the alternating current output by the charging pile is 16A, the upper limit of the alternating current input by the vehicle-mounted charger is 32A, and at the moment, the input current of the vehicle-mounted charger is required to be not more than 16A, namely the input current of the vehicle-mounted charger is smaller than the input current of the vehicle-mounted charger.
Under the condition that the charging pile and the vehicle-mounted charger are not overloaded, the input current of the vehicle-mounted charger needs to be increased as much as possible so as to reduce the charging time. For example, for case 1): the input current of the vehicle-mounted charger is required to be equal to the upper limit current of 16A, because if the actual input current of the vehicle-mounted charger is greater than 16A, the vehicle-mounted charger works in an overload state, and the vehicle-mounted charger violates the initial design rule of the vehicle-mounted charger and is not allowed; if the actual input current of the vehicle-mounted charger is less than 16A, the charging time can be prolonged, the power level of the vehicle-mounted charger is not highlighted, and the initial design rule is violated. For case 2): the input current of the vehicle-mounted charger is required to be equal to the upper limit current of 16A, and if the actual input current of the vehicle-mounted charger is greater than 16A, the charging pile works in an overload state, and the charging pile is not allowed due to the fact that the initial design rule of the charging pile is violated; if the actual input current of the vehicle-mounted charger is less than 16A, the charging time can be prolonged, the power level of the charging pile is not highlighted, and the initial design rule is violated.
How the vehicle-mounted charger accurately works at the upper limit current, namely the actual input current of the vehicle-mounted charger is equal to the upper limit current, becomes an important index for measuring the performance of the vehicle-mounted charger.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a current limiting method for a charging device, so that the charging device, such as an on-board charger, can stably operate near an upper limit current, thereby improving the performance of the charging device.
A second object of the present invention is to provide a current limiting device for a charging apparatus.
To achieve the above object, an embodiment of a first aspect of the present invention provides a current limiting method for a charging device, including:
acquiring an input current actual value of the charging equipment;
subtracting the actual value of the input current from the upper limit current value of the charging equipment to obtain an error signal;
adjusting the error signal to obtain an adjustment signal;
and subtracting the adjusting signal from the charging current set value of the charged equipment to obtain a sum as a new charging current set value of the charged equipment.
According to the current limiting method of the charging equipment, the charging current set value of the charged equipment, such as a vehicle-mounted battery, is adjusted according to the error signal between the upper limit current value and the input current actual value of the charging equipment, such as a vehicle-mounted charger, so that the adjustment of the input current actual value of the charging equipment is realized, the charging equipment is stabilized near the upper limit current value of the charging equipment, and the performance of the charging equipment is improved.
In addition, the current limiting method of the charging device in the embodiment of the present invention further has the following additional technical features:
in an embodiment of the present invention, before adding the charging current setting value of the device to be charged and the adjustment signal, the method further includes:
and performing threshold limiting processing on the adjusting signal, wherein if the adjusting signal is greater than 0, the adjusting signal after threshold limiting processing becomes 0, and if the adjusting signal is less than or equal to 0, the adjusting signal after threshold limiting processing does not change.
In one embodiment of the present invention, the adjusting the error signal includes:
and carrying out proportional integral PI regulation on the error signal.
In an embodiment of the present invention, the charging device is a vehicle-mounted charger, and the charged device is a vehicle-mounted battery.
In one embodiment of the invention, the upper limit current value of the charging equipment is equal to the smaller current rating of the input current rating of the vehicle-mounted charger and the output current rating of the charging pile.
In order to achieve the above object, a second embodiment of the present invention provides a current limiting device for a charging apparatus, including:
the acquisition module is used for acquiring an actual value of input current of the charging equipment;
the first calculation module is used for subtracting the actual value of the input current from the upper limit current value of the charging equipment to obtain an error signal;
the adjusting module is used for adjusting the error signal to obtain an adjusting signal;
and the second calculation module is used for subtracting the charging current set value of the charged equipment from the adjusting signal to obtain a sum which is used as a new charging current set value of the charged equipment.
According to the current limiting device of the charging equipment, provided by the embodiment of the invention, the charging current set value of the charged equipment, such as a vehicle-mounted battery, is adjusted according to the error signal between the upper limit current value and the input current actual value of the charging equipment, such as a vehicle-mounted charger, so that the adjustment of the input current actual value of the charging equipment is realized, the input current actual value is stabilized near the upper limit current value of the charging equipment, and the performance of the charging equipment is improved.
In addition, the current limiting device of the charging device according to the embodiment of the present invention further has the following additional technical features:
in one embodiment of the present invention, the current limiting device further comprises:
and the limiting module is used for performing threshold limiting processing on the adjusting signal output by the adjusting module, if the adjusting signal is greater than 0, the adjusting signal after the threshold limiting processing becomes 0, and if the adjusting signal is less than or equal to 0, the adjusting signal after the threshold limiting processing is unchanged, and the adjusting signal after the threshold limiting processing is input to the second calculating module.
In an embodiment of the present invention, the adjusting module is specifically configured to: and carrying out proportional integral PI regulation on the error signal.
In an embodiment of the present invention, the charging device is a vehicle-mounted charger, and the charged device is a vehicle-mounted battery.
In one embodiment of the invention, the upper limit current value of the charging equipment is equal to the smaller current rating of the input current rating of the vehicle-mounted charger and the output current rating of the charging pile.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a charging system for an electric vehicle according to the prior art;
fig. 2 is a schematic flowchart of a current limiting method of a charging device according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating a current limiting method of the charging device according to the embodiment shown in fig. 2;
fig. 4 is a schematic flowchart of a current limiting method of another charging device according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating a current limiting method of the charging device of the embodiment shown in fig. 4; and
fig. 6 is a schematic structural diagram of a current limiting device of a charging apparatus according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A current limiting method and apparatus of a charging device according to an embodiment of the present invention are described below with reference to the drawings.
Fig. 2 is a schematic flowchart of a current limiting method of a charging device according to an embodiment of the present invention. Fig. 3 is a schematic diagram illustrating a current limiting method of the charging device according to the embodiment shown in fig. 2. As shown in fig. 2 and 3, the current limiting method of the charging device includes the following steps:
s201, collecting an input current actual value of the charging equipment.
Specifically, a current detection device such as a current sensor may be used to acquire the actual input current Iac _ sample of the charging device in operation. The charging device may be a vehicle-mounted charger or the like, and is used for charging a charged device such as a vehicle-mounted battery.
And S202, subtracting the actual value of the input current from the upper limit current value of the charging equipment to obtain an error signal.
Specifically, the upper limit current value Iac _ limit of the charging device is subtracted from the actual input current value Iac _ sample of the charging device collected in step S201, so as to obtain an Error signal Error ═ Iac _ limit-Iac _ sample. Here, the upper limit current value Iac _ limit of the charging device is an upper limit value of an input current when the user desires the charging device to operate. In the electric vehicle charging system, the upper limit current value Iac _ limit of the charging equipment, namely the upper limit current value Iac _ limit of the vehicle-mounted charger is equal to the smaller current rating of the input current rating of the vehicle-mounted charger and the output current rating of the charging pile.
And S203, adjusting the error signal to obtain an adjusting signal.
Specifically, the Error signal Error obtained in step S202 may be adjusted by various existing regulators, such as a Proportional-Integral (PI) regulator, for example, to obtain an adjustment signal Out 1.
And S204, adding the charging current set value of the charged equipment and the adjusting signal, and taking the sum as a new charging current set value of the charged equipment.
Specifically, the charging current setting value Idc _ ref1 of the charged device and the adjustment signal Out1 obtained in step S203 are added, and the resulting sum is the new charging current setting value Idc _ ref1+ Out1 of the charged device.
The following relation exists between the charging equipment and the load of the charged equipment: input voltage of the charging device, input current of the charging device, efficiency, voltage of the charged device and charging current of the charged device;
the input voltage of the charging equipment can be detected, but is not controlled by the charging equipment;
the efficiency is not a constant value and is different under different working conditions;
the voltage of the charged device can be detected but is not controlled by the charging device;
the charging current of the charged device is controlled by the charging device, namely the charging device can set the charging current of the charged device;
in conclusion, the charging current of the charged equipment is reasonably set, and the purpose of controlling the input current of the charging equipment is achieved.
Therefore, the charging current setting value of the charged device is changed in step S204, which results in a change in the input current actual value Iac _ sample of the charging device.
Based on the above steps, in the embodiment of the present invention, when the actual input current value Iac _ sample of the charging device is greater than the upper limit current value Iac _ limit of the charging device, the Error signal Error and the adjustment signal Out1 are negative, the set charging current value of the device to be charged is decreased, the charging power is decreased, and further, the actual input current value Iac _ sample of the charging device is decreased; conversely, when the actual input current value Iac _ sample of the charging device is smaller than the upper limit current value Iac _ limit of the charging device, the Error signal Error and the adjustment signal Out1 are positive, the set charging current value of the charged device is increased, the charging power is increased, and further the actual input current value Iac _ sample of the charging device is increased. Finally, the actual input current value Iac _ sample of the charging device is stabilized near the upper limit current value Iac _ limit of the charging device, and the performance of the charging device is improved. If a no-static-difference regulator, such as a PI regulator, is used to perform PI regulation on the Error signal Error, the actual input current value Iac _ sample of the charging device will eventually stabilize at the upper limit current value Iac _ limit of the charging device.
In this embodiment, the charging current setting value of the charged device, for example, a vehicle-mounted battery, is adjusted according to an error signal between the upper limit current value and the input current actual value of the charging device, for example, a vehicle-mounted charger, so that the adjustment of the input current actual value of the charging device is realized, the input current actual value is stabilized near the upper limit current value of the charging device, and the performance of the charging device is improved.
For clarity of the above embodiment, the present embodiment provides another current limiting method for a charging device. Fig. 4 is a flowchart illustrating a current limiting method of another charging device according to an embodiment of the present invention. Fig. 5 is a schematic diagram illustrating a current limiting method of the charging device according to the embodiment shown in fig. 4. As shown in fig. 4 and 5, the current limiting method of the charging device may include the following steps:
s401, collecting an input current actual value of the charging equipment.
And S402, subtracting the actual value of the input current from the upper limit current value of the charging equipment to obtain an error signal.
And S403, adjusting the error signal to obtain an adjusting signal.
Specifically, steps S401 to S403 are the same as steps S201 to S203 in the previous embodiment, and are not described again here.
S404, performing threshold limiting processing on the adjusting signal, wherein if the adjusting signal is greater than 0, the adjusting signal after threshold limiting processing becomes 0, and if the adjusting signal is less than or equal to 0, the adjusting signal after threshold limiting processing does not change.
Specifically, if the adjustment signal Out1 obtained in step S403 is greater than 0, the adjustment signal Out2 after the threshold limiting process becomes 0, that is, Out2 is equal to 0. If the adjustment signal Out1 obtained in step S403 is less than or equal to 0, the adjustment signal Out2 after the threshold limiting process is unchanged, i.e., Out2 is Out 1.
S405, the charging current setting value of the device to be charged and the adjustment signal are added, and the obtained sum is used as the new charging current setting value of the device to be charged.
Specifically, the charging current setting value Idc _ ref1 of the device to be charged and the adjustment signal Out2 after the threshold limiting process obtained in step S404 are added, and the resulting sum is used as the new charging current setting value Idc _ ref — Idc _ ref1+ Out2 of the device to be charged.
Based on the above steps, in the embodiment of the present invention, when the actual input current value Iac _ sample of the charging device is greater than the upper limit current value Iac _ limit of the charging device, the Error signal Error, the adjustment signal Out1, and the adjustment signal Out2 after the threshold limiting process are negative, the set charging current value of the device to be charged is decreased, the charging power is decreased, and further, the actual input current value Iac _ sample of the charging device is decreased; conversely, when the actual input current value Iac _ sample of the charging device is smaller than the upper limit current value Iac _ limit of the charging device, the Error signal Error and the adjustment signal Out1 are positive, the adjustment signal Out2 after the threshold limiting process becomes 0, the set charging current value of the device to be charged is unchanged, the charging power is unchanged, and the actual input current value Iac _ sample of the charging device is also unchanged. Finally, the actual input current value Iac _ sample of the charging device is stabilized near the upper limit current value Iac _ limit of the charging device, and the performance of the charging device is improved. If a no-static-difference regulator, such as a PI regulator, is used to perform PI regulation on the Error signal Error, the actual input current value Iac _ sample of the charging device will eventually stabilize at the upper limit current value Iac _ limit of the charging device.
In this embodiment, the charging current setting value of the charged device, for example, a vehicle-mounted battery, is adjusted according to an error signal between the upper limit current value and the input current actual value of the charging device, for example, a vehicle-mounted charger, so that the adjustment of the input current actual value of the charging device is realized, the input current actual value is stabilized near the upper limit current value of the charging device, and the performance of the charging device is improved.
In order to implement the above embodiments, the present invention further provides a current limiting device of a charging apparatus. Fig. 6 is a schematic structural diagram of a current limiting device of a charging apparatus according to an embodiment of the present invention. As shown in fig. 6, the current limiting device of the charging apparatus includes: an acquisition module 61, a first calculation module 62, an adjustment module 63 and a second calculation module 64.
And the acquisition module 61 is used for acquiring an actual value of the input current of the charging equipment.
And the first calculation module 62 is configured to subtract the actual value of the input current from the upper limit current value of the charging device to obtain an error signal.
And the adjusting module 63 is configured to adjust the error signal to obtain an adjusting signal.
And a second calculating module 64, configured to add the charging current setting value of the device to be charged and the adjustment signal, and obtain a sum as a new charging current setting value of the device to be charged.
Further, in a possible implementation manner of the embodiment of the present invention, the current limiting device of the charging apparatus further includes: a limiting module 65, configured to perform threshold limiting processing on the adjustment signal output by the adjusting module 63, where if the adjustment signal is greater than 0, the adjustment signal after threshold limiting processing becomes 0, and if the adjustment signal is less than or equal to 0, the adjustment signal after threshold limiting processing does not change, and the adjustment signal after threshold limiting processing is input to the second calculating module 64.
Further, in a possible implementation manner of the embodiment of the present invention, the adjusting module 63 is specifically configured to: and carrying out proportional integral PI regulation on the error signal.
Further, in a possible implementation manner of the embodiment of the present invention, the charging device is a vehicle-mounted charger, and the charged device is a vehicle-mounted battery.
Further, in a possible implementation manner of the embodiment of the present invention, the upper limit current value of the charging device is equal to the smaller current rating of the input current rating of the vehicle-mounted charger and the output current rating of the charging pile.
It should be noted that the foregoing explanation of the embodiment of the current limiting method for the charging device is also applicable to the current limiting apparatus for the charging device in this embodiment, and details are not repeated here.
In the embodiment of the invention, the charging current set value of the charged equipment, such as a vehicle-mounted battery, is adjusted according to the error signal between the upper limit current value and the input current actual value of the charging equipment, such as a vehicle-mounted charger, so that the adjustment of the input current actual value of the charging equipment is realized, the input current actual value is stabilized near the upper limit current value of the charging equipment, and the performance of the charging equipment is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A current limiting method of a charging device, comprising the steps of:
acquiring an input current actual value of the charging equipment;
subtracting the actual value of the input current from the upper limit current value of the charging equipment to obtain an error signal;
adjusting the error signal to obtain an adjustment signal;
adding the charging current set value of the charged device and the adjusting signal to obtain a sum, and using the sum as a new charging current set value of the charged device;
the charging equipment is a vehicle-mounted charger, the charged equipment is a vehicle-mounted battery, and the upper limit current value of the charging equipment is equal to the smaller current rating of the input current rating of the vehicle-mounted charger and the output current rating of the charging pile.
2. The current limiting method of claim 1, wherein prior to adding the charging current setpoint of the device to be charged and the adjustment signal, further comprising:
and performing threshold limiting processing on the adjusting signal, wherein if the adjusting signal is greater than 0, the adjusting signal after threshold limiting processing becomes 0, and if the adjusting signal is less than or equal to 0, the adjusting signal after threshold limiting processing does not change.
3. The current-limiting method of claim 1, wherein said adjusting the error signal comprises:
and carrying out proportional integral PI regulation on the error signal.
4. A current limiting device of a charging apparatus, comprising:
the acquisition module is used for acquiring an actual value of input current of the charging equipment;
the first calculation module is used for subtracting the actual value of the input current from the upper limit current value of the charging equipment to obtain an error signal;
the adjusting module is used for adjusting the error signal to obtain an adjusting signal;
the second calculation module is used for adding the charging current set value of the charged equipment and the adjusting signal to obtain a sum which is used as a new charging current set value of the charged equipment;
the charging equipment is a vehicle-mounted charger, the charged equipment is a vehicle-mounted battery, and the upper limit current value of the charging equipment is equal to the smaller current rating of the input current rating of the vehicle-mounted charger and the output current rating of the charging pile.
5. The current-limiting device of claim 4, further comprising:
and the limiting module is used for performing threshold limiting processing on the adjusting signal output by the adjusting module, if the adjusting signal is greater than 0, the adjusting signal after the threshold limiting processing becomes 0, and if the adjusting signal is less than or equal to 0, the adjusting signal after the threshold limiting processing is unchanged, and the adjusting signal after the threshold limiting processing is input to the second calculating module.
6. The current-limiting device of claim 4, wherein the adjustment module is specifically configured to: and carrying out proportional integral PI regulation on the error signal.
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| CN113135108B (en) * | 2020-07-30 | 2022-08-19 | 长城汽车股份有限公司 | Charging control method and system and vehicle |
| CN113815466B (en) * | 2021-11-03 | 2023-08-11 | 阳光电源股份有限公司 | Charging pile output control method and device |
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| CN201639320U (en) * | 2010-01-18 | 2010-11-17 | 上海东裕电动车有限公司 | Electric vehicle and solar charging device thereof |
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| JP2013251961A (en) * | 2012-05-31 | 2013-12-12 | Fuji Electric Co Ltd | Charger |
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| US7615887B2 (en) * | 2007-03-09 | 2009-11-10 | Gm Global Technology Operations, Inc. | Method and system for operating a power converter |
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| CN201639320U (en) * | 2010-01-18 | 2010-11-17 | 上海东裕电动车有限公司 | Electric vehicle and solar charging device thereof |
| JP2013251961A (en) * | 2012-05-31 | 2013-12-12 | Fuji Electric Co Ltd | Charger |
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