CN114084000A - Charging control method, device, equipment and storage medium for electric automobile - Google Patents
Charging control method, device, equipment and storage medium for electric automobile Download PDFInfo
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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
- B60L53/10—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 characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a charging control method, a charging control device, charging control equipment and a storage medium of an electric automobile, wherein the method comprises the steps of obtaining the charging port voltage of the electric automobile, the discharging port voltage of a charging pile and the actual charging current; obtaining a charging contact resistance according to the relation between the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance; acquiring the maximum charging current corresponding to the charging contact resistance from a preset maximum current and charging contact resistance comparison table, wherein the preset maximum current and charging contact resistance comparison table reflects the maximum charging current corresponding to the charging contact resistances with different resistance values when the maximum temperature threshold value is not exceeded; the actual charging current is adjusted so that it does not exceed the maximum charging current. According to the charging control method, the charging control device, the charging control equipment and the storage medium of the electric automobile, the charging current is controlled based on the contact resistor, the over-temperature of the charging port is avoided, and the safety and the reliability of the charging process are guaranteed.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a charging control method, a charging control device, charging control equipment and a storage medium for an electric automobile.
Background
With the continuous development of new energy technology, electric vehicles are gradually accepted by the market and favored by consumers due to the advantages of quick start, zero emission, low noise, low energy consumption and the like.
Charging between the electric automobile and the charging pile provides energy supply for normal operation of the vehicle, and the importance degree of the energy supply is self-evident. The inventor finds that the charging time of the existing electric automobile tends to be shortened, the charging efficiency is improved, and the influence of temperature factors in the charging process is ignored, and actually, the heat loss of charging ports such as a charging gun and a charging seat is improved due to the overhigh temperature in the charging process, the service life of charging components is shortened, and fire accidents are caused, so that the property loss of personnel is caused in the serious case.
Disclosure of Invention
The invention provides a charging control method, a charging control device, charging control equipment and a storage medium of an electric automobile, aiming at solving the technical problems that the heat loss of a charging component is improved and the safety is reduced because the over-temperature phenomenon is easy to occur in the charging process of the existing electric automobile.
In order to solve the above technical problem, an embodiment of the present invention provides a charging control method for an electric vehicle, including:
respectively acquiring charging port voltage of the electric automobile, discharging port voltage of the charging pile and actual charging current;
obtaining a charging contact resistance according to the relation among the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance;
acquiring the maximum charging current corresponding to the charging contact resistance from a preset maximum current and charging contact resistance comparison table, wherein the preset maximum current and charging contact resistance comparison table reflects the maximum charging current corresponding to the charging contact resistances with different resistance values when the maximum temperature threshold value is not exceeded;
adjusting the actual charging current so that it does not exceed the maximum charging current.
As one preferred scheme, the obtaining the charging contact resistance according to the relationship among the charging port voltage, the discharging port voltage, the actual charging current, and the charging contact resistance specifically includes:
substituting the charging port voltage, the discharging port voltage and the actual charging current into a first calculation formula to obtain a charging contact resistance;
the first calculation formula is:
R＝(U1-U2)/I
wherein, R is the charging contact resistance, U1 is the charging port voltage, U2 is the discharging port voltage, and I is the actual charging current.
As one preferable scheme, after the charging port voltage of the electric vehicle, the discharging port voltage of the charging pile and the actual charging current are respectively obtained, the charging control method of the electric vehicle further includes:
and respectively carrying out filtering processing on the charging port voltage and the discharging port voltage.
As one of preferable schemes, the charging control method of the electric vehicle further includes:
and if the actual charging current exceeds the maximum charging current, interrupting the charging handshake between the charging port of the electric automobile and the discharging port of the charging pile.
Another embodiment of the present invention provides a charge control device for an electric vehicle, including:
the parameter acquisition module is used for respectively acquiring the charging port voltage of the electric automobile, the discharging port voltage of the charging pile and the actual charging current;
the resistance acquisition module is used for acquiring the charging contact resistance according to the relation among the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance;
the current obtaining module is used for obtaining the maximum charging current corresponding to the charging contact resistance from a preset maximum current and charging contact resistance comparison table, wherein the preset maximum current and charging contact resistance comparison table reflects the maximum charging current corresponding to the charging contact resistances with different resistance values when the maximum temperature threshold value is not exceeded;
and the adjusting module is used for adjusting the actual charging current to enable the actual charging current not to exceed the maximum charging current.
As one preferred scheme, the resistance obtaining module is specifically configured to:
substituting the charging port voltage, the discharging port voltage and the actual charging current into a first calculation formula to obtain a charging contact resistance;
the first calculation formula is:
R＝(U1-U2)/I
wherein, R is the charging contact resistance, U1 is the charging port voltage, U2 is the discharging port voltage, and I is the actual charging current.
As one of preferable schemes, the charging control device of the electric vehicle further includes:
and the filtering module is used for respectively filtering the charging port voltage and the discharging port voltage.
As one of preferable schemes, the charging control device of the electric vehicle further includes:
and the interruption module is used for interrupting the charging handshake between the charging port of the electric automobile and the discharging port of the charging pile when the actual charging current exceeds the maximum charging current.
Yet another embodiment of the present invention provides a charging control apparatus for an electric vehicle, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the charging control method for an electric vehicle as described above when executing the computer program.
Still another embodiment of the present invention provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program runs, a device in which the computer-readable storage medium is located is controlled to execute the charging control method for an electric vehicle as described above.
Compared with the prior art, the embodiment of the invention has the advantages that at least one point is as follows: the method comprises the steps of monitoring relevant parameters of a charging assembly of a charging port in a charging process in real time, firstly respectively obtaining charging port voltage of an electric automobile, discharging port voltage of a charging pile and actual charging current, then obtaining charging contact resistance according to the relation between the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance, then obtaining the maximum charging current corresponding to the charging contact resistance in a preset maximum current and charging contact resistance comparison table, and finally adjusting the actual charging current to enable the actual charging current not to exceed the maximum charging current. The contact resistance of rifle and charging seat is calculated through the voltage difference between the mouth that discharges of filling electric pile and electric automobile's the mouth that charges to whole process, and the maximum value that charging current does not exceed maximum temperature threshold value corresponds is not exceeded based on contact resistance control to avoided the mouth that charges overtemperature, improved the charging speed under the great condition of contact resistance simultaneously, ensured electric automobile's the security and the reliability of charging.
Drawings
Fig. 1 is a schematic flow chart of a charging control method for an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of charging interaction between an electric vehicle and a charging pile according to an embodiment of the invention;
FIG. 3 is a logic diagram of a charging control method for an electric vehicle according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a charging control device of an electric vehicle according to an embodiment of the invention;
fig. 5 is a block diagram of a charging control apparatus of an electric vehicle in one embodiment of the invention;
reference numerals:
11, a parameter acquisition module; 12. a resistance acquisition module; 13. a current acquisition module; 14. an adjustment module; 21. a processor; 22. a memory; A. a charging gun; B. a charging seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first," "second," "third," etc. may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description of the present application, it is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as those skilled in the art will recognize the specific meaning of the terms used in the present application in a particular context.
An embodiment of the present invention provides a charging control method for an electric vehicle, and in particular, please refer to fig. 1 to 2, where fig. 1 is a schematic flow diagram illustrating the charging control method for the electric vehicle in one embodiment of the present invention, and fig. 2 is a schematic charging interaction diagram between the electric vehicle and a charging pile in one embodiment of the present invention, where the charging control method for the electric vehicle includes steps S1 to S4:
s1, respectively acquiring the charging port voltage of the electric automobile, the discharging port voltage of the charging pile and the actual charging current;
s2, obtaining a charging contact resistance according to the relation among the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance;
s3, acquiring the maximum charging current corresponding to the charging contact resistance from a preset maximum current and charging contact resistance comparison table, wherein the preset maximum current and charging contact resistance comparison table reflects the maximum charging current corresponding to the charging contact resistances with different resistance values when the maximum temperature threshold value is not exceeded;
and S4, adjusting the actual charging current to be not more than the maximum charging current.
It should be noted that, as shown in fig. 2, the charging of the electric vehicle is performed by inserting the charging gun a on the charging pile into the charging seat B of the electric vehicle, and the inventor finds that the temperature changes of the charging gun a and the charging seat B at the charging port have an extremely important influence on the safety and reliability of the whole charging process, so that the charging current in the charging process is controlled by introducing the intermediate parameter "charging contact resistance", thereby improving the charging efficiency of the electric vehicle and ensuring the safety and reliability of the charging process.
Specifically, referring to fig. 3, fig. 3 is a logic block diagram of a charging control method for an electric vehicle according to an embodiment of the present invention, in which a charging handshake is first established during an actual charging process. In a digital circuit (such as a computer), a device A and a device B exchange information (communication), the two parties exchange data by adopting a certain communication specification (protocol), the communication process of the two parties is called 'handshake', the signal for communication is called 'handshake', the charging handshake in the embodiment means that after a user inserts a charging gun A into a charging seat B, the charging pile is successfully matched with an electric automobile, and charging is started. In the charging process, a charging cycle with a holding time of T1 may be set first, and in this charging cycle, a controller of a vehicle (for example, a vehicle ECU) acquires relevant electrical parameters of a charging port, including a charging port voltage U1 of the electric vehicle, a discharging port voltage U2 of the charging pile and an actual charging current I, of course, the charging port voltage U1 of the electric vehicle may be transmitted to the vehicle controller through a relevant LIN/CAN bus, and the discharging port voltage U2 of the charging pile may be acquired by the ECU of the charging pile and then transmitted to the vehicle controller through a relevant mobile communication manner.
Further, after obtaining the parameters, it is necessary to obtain an intermediate parameter "charging contact resistance" according to the parameters, in this embodiment, the charging port voltage, the discharging port voltage, and the actual charging current are substituted into a first calculation formula to obtain the charging contact resistance;
the first calculation formula is:
R＝(U1-U2)/I
wherein, R is the charging contact resistance, U1 is the charging port voltage, U2 is the discharging port voltage, and I is the actual charging current.
After the charging contact resistance is obtained, the charging contact resistance can be inquired in a preset comparison table, and the maximum charging current corresponding to the charging contact resistance is obtained. It should be noted that the maximum current and charging contact resistance comparison table is preset and can be determined for experiments, for example, experiments are performed to obtain the maximum charging current I allowed under different gun holder contact resistancesmaxIn the process ofCurrent ImaxNext, the charging assembly is operated for a full charge cycle with a charging temperature that does not exceed T1(TI is the maximum temperature threshold above which excessive charging mouth temperatures may result). Of course, the determination of the maximum temperature threshold value comprehensively considers the actual vehicle model, the national standard specification of charging and the limitation of the charging material, and is not described herein again.
At the maximum charging current ImaxThen, the actual charging current may be adjusted such that it does not exceed the maximum charging current ImaxTherefore, the charging efficiency of the electric automobile is improved, the charging port is prevented from being over-temperature, and the safety and reliability of the charging process are guaranteed.
Further, in the above step S1: after the charging port voltage of the electric automobile, the discharging port voltage of the charging pile and the actual charging current are respectively obtained, the charging control method of the electric automobile further comprises the following steps: and respectively carrying out filtering processing on the charging port voltage and the discharging port voltage. The filtering processing can eliminate the influence of interference noise and improve the accuracy of data, thereby providing accurate data support for subsequent charging control.
Certainly, if the actual charging current is detected to exceed the maximum charging current, the charging handshake between the charging port of the electric automobile and the discharging port of the charging pile can be interrupted, the over-temperature interruption is realized, and therefore the intelligent control effect of the electric automobile charging is improved.
Specifically, referring to fig. 4, fig. 4 is a schematic structural diagram of a charging control device of an electric vehicle according to an embodiment of the present invention, where the charging control device of the electric vehicle in the embodiment includes:
the parameter obtaining module 11 is configured to obtain a charging port voltage of the electric vehicle, a discharging port voltage of the charging pile, and an actual charging current respectively;
the resistance obtaining module 12 is configured to obtain a charging contact resistance according to a relationship between the charging port voltage, the discharging port voltage, the actual charging current, and the charging contact resistance;
the current obtaining module 13 is configured to obtain a maximum charging current corresponding to the charging contact resistor from a preset maximum current and charging contact resistor comparison table, where the preset maximum current and charging contact resistor comparison table reflects the maximum charging current corresponding to charging contact resistors with different resistance values when the maximum temperature threshold is not exceeded;
and an adjusting module 14, configured to adjust the actual charging current so that the actual charging current does not exceed the maximum charging current.
Further, in the above embodiment, the resistance obtaining module is specifically configured to:
substituting the charging port voltage, the discharging port voltage and the actual charging current into a first calculation formula to obtain a charging contact resistance;
the first calculation formula is:
R＝(U1-U2)/I
wherein, R is the charging contact resistance, U1 is the charging port voltage, U2 is the discharging port voltage, and I is the actual charging current.
Further, in the above embodiment, the charging control apparatus for an electric vehicle further includes:
and the filtering module is used for respectively filtering the charging port voltage and the discharging port voltage.
Further, in the above embodiment, the charging control apparatus for an electric vehicle further includes:
and the interruption module is used for interrupting the charging handshake between the charging port of the electric automobile and the discharging port of the charging pile when the actual charging current exceeds the maximum charging current.
Referring to fig. 5, which is a block diagram of a charging control device of an electric vehicle according to an embodiment of the present invention, a charging control device 20 of an electric vehicle according to an embodiment of the present invention includes a processor 21, a memory 22, and a computer program stored in the memory 22 and configured to be executed by the processor 21, where the processor 21 executes the computer program to implement the steps in the charging control method embodiment of the electric vehicle, such as steps S1 to S4 shown in fig. 1; alternatively, the processor 21, when executing the computer program, implements the functions of the modules in the above device embodiments, such as the parameter obtaining module 11.
Illustratively, the computer program may be divided into one or more modules, which are stored in the memory 22 and executed by the processor 21 to accomplish the present invention. The one or more modules may be a series of instruction segments of a computer program capable of performing a specific function, which are used to describe the execution process of the computer program in the charging control device 20 of the electric vehicle. For example, the computer program may be divided into a parameter obtaining module 11, a resistance obtaining module 12, a current obtaining module 13, and an adjusting module 14, where the specific functions of the modules are as follows:
the parameter obtaining module 11 is configured to obtain a charging port voltage of the electric vehicle, a discharging port voltage of the charging pile, and an actual charging current respectively;
the resistance obtaining module 12 is configured to obtain a charging contact resistance according to a relationship between the charging port voltage, the discharging port voltage, the actual charging current, and the charging contact resistance;
the current obtaining module 13 is configured to obtain a maximum charging current corresponding to the charging contact resistor from a preset maximum current and charging contact resistor comparison table, where the preset maximum current and charging contact resistor comparison table reflects the maximum charging current corresponding to charging contact resistors with different resistance values when the maximum temperature threshold is not exceeded;
and an adjusting module 14, configured to adjust the actual charging current so that the actual charging current does not exceed the maximum charging current.
The charging control device 20 of the electric vehicle may include, but is not limited to, a processor 21 and a memory 22. It will be understood by those skilled in the art that the schematic diagram is merely an example of the charging control device 20 of the electric vehicle, and does not constitute a limitation of the charging control device 20 of the electric vehicle, and may include more or less components than those shown, or combine some components, or different components, for example, the charging control device 20 of the electric vehicle may further include an input-output device, a network access device, a bus, etc.
The Processor 21 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, and the processor 21 is a control center of the charging control device 20 of the electric vehicle, and various interfaces and lines are used to connect various parts of the charging control device 20 of the entire electric vehicle.
The memory 22 may be used to store the computer programs and/or modules, and the processor 21 implements various functions of the charging control apparatus 20 of the electric vehicle by running or executing the computer programs and/or modules stored in the memory 22 and calling data stored in the memory 22. The memory 22 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory 22 may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The integrated modules of the charge control device 20 of the electric vehicle may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as independent products. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Accordingly, an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where the computer program, when running, controls an apparatus where the computer-readable storage medium is located to perform steps in the charging control method for an electric vehicle according to the above-mentioned embodiment, such as steps S1 to S4 shown in fig. 1.
The charging control method, the charging control device, the charging control equipment and the charging control storage medium for the electric automobile have the advantages that at least one point is as follows:
the method comprises the steps of monitoring relevant parameters of a charging assembly of a charging port in a charging process in real time, firstly respectively obtaining charging port voltage of an electric automobile, discharging port voltage of a charging pile and actual charging current, then obtaining charging contact resistance according to the relation between the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance, then obtaining the maximum charging current corresponding to the charging contact resistance in a preset maximum current and charging contact resistance comparison table, and finally adjusting the actual charging current to enable the actual charging current not to exceed the maximum charging current. The contact resistance of rifle and charging seat is calculated through the voltage difference between the mouth that discharges of filling electric pile and electric automobile's the mouth that charges to whole process, and the maximum value that charging current does not exceed maximum temperature threshold value corresponds is not exceeded based on contact resistance control to avoided the mouth that charges overtemperature, improved the charging speed under the great condition of contact resistance simultaneously, ensured electric automobile's the security and the reliability of charging.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A charging control method for an electric vehicle is characterized by comprising the following steps:
respectively acquiring charging port voltage of the electric automobile, discharging port voltage of the charging pile and actual charging current;
obtaining a charging contact resistance according to the relation among the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance;
acquiring the maximum charging current corresponding to the charging contact resistance from a preset maximum current and charging contact resistance comparison table, wherein the preset maximum current and charging contact resistance comparison table reflects the maximum charging current corresponding to the charging contact resistances with different resistance values when the maximum temperature threshold value is not exceeded;
adjusting the actual charging current so that it does not exceed the maximum charging current.
2. The method according to claim 1, wherein the obtaining of the charging contact resistance according to the relationship between the charging port voltage, the discharging port voltage, the actual charging current, and the charging contact resistance specifically includes:
substituting the charging port voltage, the discharging port voltage and the actual charging current into a first calculation formula to obtain a charging contact resistance;
the first calculation formula is:
R＝(U1-U2)/I
wherein, R is the charging contact resistance, U1 is the charging port voltage, U2 is the discharging port voltage, and I is the actual charging current.
3. The method for controlling charging of an electric vehicle according to claim 1, wherein after the obtaining of the charging port voltage of the electric vehicle, the discharging port voltage of the charging post, and the actual charging current, respectively, the method for controlling charging of an electric vehicle further comprises:
and respectively carrying out filtering processing on the charging port voltage and the discharging port voltage.
4. The charge control method of an electric vehicle according to claim 1, further comprising:
and if the actual charging current exceeds the maximum charging current, interrupting the charging handshake between the charging port of the electric automobile and the discharging port of the charging pile.
5. A charge control device for an electric vehicle, comprising:
the parameter acquisition module is used for respectively acquiring the charging port voltage of the electric automobile, the discharging port voltage of the charging pile and the actual charging current;
the resistance acquisition module is used for acquiring the charging contact resistance according to the relation among the charging port voltage, the discharging port voltage, the actual charging current and the charging contact resistance;
the current obtaining module is used for obtaining the maximum charging current corresponding to the charging contact resistance from a preset maximum current and charging contact resistance comparison table, wherein the preset maximum current and charging contact resistance comparison table reflects the maximum charging current corresponding to the charging contact resistances with different resistance values when the maximum temperature threshold value is not exceeded;
and the adjusting module is used for adjusting the actual charging current to enable the actual charging current not to exceed the maximum charging current.
6. The charging control apparatus of an electric vehicle according to claim 1, wherein the resistance obtaining module is specifically configured to:
substituting the charging port voltage, the discharging port voltage and the actual charging current into a first calculation formula to obtain a charging contact resistance;
the first calculation formula is:
R＝(U1-U2)/I
wherein, R is the charging contact resistance, U1 is the charging port voltage, U2 is the discharging port voltage, and I is the actual charging current.
7. The charge control device of an electric vehicle according to claim 1, further comprising:
and the filtering module is used for respectively filtering the charging port voltage and the discharging port voltage.
8. The charge control device of an electric vehicle according to claim 1, further comprising:
and the interruption module is used for interrupting the charging handshake between the charging port of the electric automobile and the discharging port of the charging pile when the actual charging current exceeds the maximum charging current.
9. A charge control apparatus of an electric vehicle, characterized by comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the charge control method of the electric vehicle according to any one of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program runs, the computer-readable storage medium controls a device to execute the charging control method of the electric vehicle according to any one of claims 1 to 4.
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