CN116118549A - Method and device for determining guiding state of alternating-current charging pile and alternating-current charging pile - Google Patents
Method and device for determining guiding state of alternating-current charging pile and alternating-current charging pile Download PDFInfo
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- CN116118549A CN116118549A CN202310348703.2A CN202310348703A CN116118549A CN 116118549 A CN116118549 A CN 116118549A CN 202310348703 A CN202310348703 A CN 202310348703A CN 116118549 A CN116118549 A CN 116118549A
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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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- 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
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention discloses a method and a device for determining a guiding state of an alternating-current charging pile and the alternating-current charging pile. The guidance state determining method comprises the following steps: acquiring a guide wire voltage and a guide state and voltage sampling value correspondence table of an alternating-current charging pile; determining the interval range of the guide wire voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table; and converting the interval range of the guide line voltage into a register interval range, and determining the guide state of the alternating-current charging pile according to the register interval range and the guide line voltage. The method and the device for determining the guiding state of the alternating current charging pile and the alternating current charging pile, provided by the embodiment of the invention, can ensure the reliability of the guiding state determination and improve the efficiency.
Description
Technical Field
The embodiment of the invention relates to a charging pile technology, in particular to a guiding state determining method and device of an alternating current charging pile and the alternating current charging pile.
Background
With the wide popularization of new energy electric vehicles, the charging equipment provides alternating current or direct current power for the new energy electric vehicles, and the development of the new energy electric vehicles is rapid. The alternating-current charging pile and the new energy electric automobile are connected through the control guidance system to exchange information, and the guidance state of the alternating-current charging pile needs to be determined so as to better charge the new energy electric automobile.
At present, in the existing guiding state determining method of the ac charging pile, the guiding state is generally determined by calculating the voltage value of the AD register according to the voltage AD register value and the linear relation of the connection of the guiding wires, if the sampling frequency of the AD register is not increased, the error rate is increased, and if the sampling frequency is increased, the efficiency is affected.
Disclosure of Invention
The embodiment of the invention provides a guiding state determining method and device of an alternating current charging pile and the alternating current charging pile, so that the reliability of guiding state determination is ensured and the efficiency is improved.
In a first aspect, an embodiment of the present invention provides a method for determining a guidance state of an ac charging pile, including:
acquiring a guide wire voltage and a guide state and voltage sampling value correspondence table of an alternating-current charging pile;
determining the interval range of the guide wire voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table;
and converting the interval range of the guide line voltage into a register interval range, and determining the guide state of the alternating-current charging pile according to the register interval range and the guide line voltage.
Optionally, determining the interval range of the guide line voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table includes:
according to the guide state and voltage sampling value corresponding table, determining voltage sampling values corresponding to the guide states of the alternating-current charging piles;
and determining the interval range of the guide line voltage according to the voltage sampling value and the preset voltage adjustment value.
Optionally, converting the range of the lead line voltage into the range of the register range includes:
converting the interval range of the guide line voltage according to the interval range of the guide line voltage and a preset corresponding relation to obtain a converted interval range;
the converted interval range is used as a register interval range.
Optionally, determining the guidance state of the ac charging stake according to the register interval range and the guidance line voltage includes:
determining the frequency of the register interval range corresponding to the guide line voltage according to the register interval range and the guide line voltage;
and if the frequency of the register interval range is the maximum value of the frequencies of the register interval ranges and is larger than the preset minimum qualified sampling frequency, taking the guide state corresponding to the register interval range as the guide state of the alternating current charging pile.
Optionally, before the frequency of the register interval range is the maximum value of the frequencies of the register interval ranges, the method includes:
if the frequency of the register interval range is smaller than the preset minimum qualified sampling frequency, determining that the guiding state of the alternating current charging pile is illegal.
Optionally, the lead voltage is a lead voltage collected in real time, and the frequency of the register interval range is the frequency of the lead voltage in the interval range of the lead voltage corresponding to the collected register interval range.
Optionally, the booted state includes at least one of idle, connected, charged, and illegitimate.
In a second aspect, an embodiment of the present invention provides a guidance state determining apparatus for an ac charging pile, including:
the information acquisition module is used for acquiring the guide wire voltage and the guide state of the alternating-current charging pile and a corresponding table of voltage sampling values;
the interval determining module is used for determining the interval range of the guide wire voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table;
the state determining module is used for converting the interval range of the guide line voltage into the register interval range and determining the guide state of the alternating current charging pile according to the register interval range and the guide line voltage.
Optionally, the interval determining module includes:
the sampling value determining unit is used for determining the voltage sampling value corresponding to each guiding state of the alternating-current charging pile according to the guiding state and voltage sampling value corresponding table;
and the interval determining unit is used for determining the interval range of the guide wire voltage according to the voltage sampling value and the preset voltage adjustment value.
In a third aspect, an embodiment of the present invention provides an ac charging stake including a guidance state determining device as described in the second aspect.
The method and the device for determining the guiding state of the alternating-current charging pile and the alternating-current charging pile provided by the embodiment of the invention comprise the following steps: acquiring a guide wire voltage and a guide state and voltage sampling value correspondence table of an alternating-current charging pile; determining the interval range of the guide wire voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table; and converting the interval range of the guide line voltage into a register interval range, and determining the guide state of the alternating-current charging pile according to the register interval range and the guide line voltage. According to the method and device for determining the guide state of the alternating current charging pile and the alternating current charging pile, the interval range of the guide line voltage corresponding to the determined guide state is converted into the register interval range, the guide state of the alternating current charging pile is determined according to the register interval range and the guide line voltage, the register interval range is not easy to interfere compared with the existing calculated voltage value, and a large number of guide line voltages are not required to be acquired for many times, so that the reliability of guide state determination can be ensured, and the efficiency can be improved.
Drawings
Fig. 1 is a flowchart of a method for determining a guiding state of an ac charging pile according to an embodiment of the present invention;
fig. 2 is a flowchart of a guiding state determining method of an ac charging pile according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a voltage value and a corresponding interval according to a second embodiment of the present invention;
fig. 4 is a block diagram of a guiding state determining device for an ac charging pile according to a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a method for determining a guidance state of an ac charging pile according to an embodiment of the present invention, where the method may be implemented by a guidance state determining device of the ac charging pile, and the device may be implemented in software and/or hardware, and the device may be integrated in a controller of a guidance state determining system of the ac charging pile, and the method specifically includes the following steps:
and 110, acquiring a guide wire voltage and a guide state and voltage sampling value corresponding table of the alternating current charging pile.
The alternating-current charging pile is provided with a charging wire and a guide wire, the guide wire is connected with the charging pile and a controller on an electric automobile needing to be charged, and the charging wire is connected with the alternating-current charging pile and a battery of the electric automobile. The voltage transmitted by the guide wire is between a few volts and ten volts, the alternating-current charging pile and the electric automobile transmit information through the guide wire, and the alternating-current charging pile determines the guiding state through the guide wire. The guidance state of the ac charging stake includes at least one of idle, connected, charged and illegitimate states. The guide state and voltage sampling value corresponding table can be a guide state determining device which is input in advance and acquires the voltage of the guide wire in real time so as to acquire the voltage of the guide wire.
For example, the table of the pilot state and the voltage sampling value is shown in table 1, and the idle state, the connected state and the charged state in the pilot state respectively correspond to voltages 12V, 9V and 6V, and the illegal state corresponds to other voltage values. For example, the range of the pilot line voltage corresponding to the idle state is 11.2-12.8V, i.e. the range of 12±0.8V, and the voltage value and the range of the pilot line voltage corresponding to each pilot state are only schematically illustrated herein, and may be specifically determined according to the actual voltage requirement without limitation.
Table 1 guide state and voltage sample value correspondence table
And 130, converting the range of the guide line voltage into a register range, and determining the guide state of the alternating current charging pile according to the register range and the guide line voltage.
Specifically, the range of the lead voltage may be converted to a register range, such as 11.2-12.8V to R12L-R12H, based on a linear relationship between the voltage value and the register value. The range of the lead line voltage corresponds to the lead state, and the range of the register range corresponds to the corresponding lead state. The pilot line voltage that gathers in real time gathers 4000 voltage values like 20ms, 4000 voltage values probably correspond a plurality of register interval scope, and when the number of times that one register interval scope appears (this number of times is the number of times that each voltage value that corresponds in each register interval scope appears) is the biggest and is greater than the minimum qualified sampling number of times of predetermineeing, then the pilot state that this register interval scope corresponds is the pilot state of alternating current charging stake to confirm the pilot state of alternating current charging stake.
The method for determining the guiding state of the alternating current charging pile provided by the embodiment comprises the following steps: acquiring a guide wire voltage and a guide state and voltage sampling value correspondence table of an alternating-current charging pile; determining the interval range of the guide wire voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table; and converting the interval range of the guide line voltage into a register interval range, and determining the guide state of the alternating-current charging pile according to the register interval range and the guide line voltage. According to the guide state determining method for the alternating current charging pile, the range of the guide line voltage corresponding to the determined guide state is converted into the register range, the guide state of the alternating current charging pile is determined according to the register range and the guide line voltage, the register range is not easy to interfere compared with the existing calculated voltage value, and a large number of guide line voltages are not required to be acquired for many times, so that the reliability of guide state determination can be ensured, and the efficiency can be improved.
Example two
Fig. 2 is a flowchart of a method for determining a guidance state of an ac charging pile according to a second embodiment of the present invention, where the method may be implemented by a guidance state determining device of the ac charging pile, and the device may be implemented in software and/or hardware, and the device may be integrated in a controller of a guidance state determining system of the ac charging pile, and the method specifically includes the following steps:
The alternating-current charging pile is provided with a charging wire and a guide wire, the guide wire is connected with the charging pile and a controller on an electric automobile needing to be charged, and the charging wire is connected with the alternating-current charging pile and a battery of the electric automobile. The voltage transmitted by the guide wire is between a few volts and ten volts, the alternating-current charging pile and the electric automobile transmit information through the guide wire, and the alternating-current charging pile determines the guiding state through the guide wire. The guidance state of the ac charging stake includes at least one of idle, connected, charged and illegitimate states. The guide state and voltage sampling value corresponding table can be a guide state determining device which is input in advance and acquires the voltage of the guide wire in real time so as to acquire the voltage of the guide wire.
And 220, determining voltage sampling values corresponding to the guiding states of the alternating-current charging piles according to the guiding state and voltage sampling value corresponding table.
Fig. 3 is a schematic diagram of a voltage value and a corresponding interval according to a second embodiment of the present invention. Referring to fig. 3, idle, connected, and charged states in the pilot state correspond to voltages 12V, 9V, and 6V, respectively, and illegal states correspond to other voltage values.
For example, the preset voltage adjustment value is ±0.8V, and the interval range (V12L, V12H) of the guide line voltage corresponding to the idle state may be 11.2-12.8V, i.e., an interval range of 12±0.8V. The specific magnitude of the preset voltage adjustment value is only schematically illustrated, and may be specifically determined according to the actual voltage requirement, which is not limited herein.
Illustratively, the interval ranges (11.2 v,12.8 v), (8.2 v,9.8 v), (5.2 v,6.8 v) of the guide line voltage are (R12L, R12H), (R9L, R9H), (R6L, R6H) after conversion.
The guide line voltage is the guide line voltage collected in real time, and the frequency of the register interval range is the frequency of the guide line voltage in the interval range of the guide line voltage corresponding to the collected register interval range. Specifically, as shown in fig. 3, the frequencies of the register interval ranges (R12L, R12H), (R9L, R9H), and (R6L, R6H) are C12, C9, and C6, respectively, and specific values of the frequencies are the number of occurrences of voltages in the corresponding interval ranges, for example, specific values of C12 are the number of occurrences of voltages located at (11.2 v,12.8 v) among the voltages collected in real time.
Specifically, if the value of C6 is the largest and greater than the preset minimum qualified sampling times in the frequency, the guiding state of the ac charging pile is the charging state, that is, the charging pile can charge the electric automobile at the moment; if the value of C6 is the largest and smaller than the preset minimum qualified sampling times, the guiding state of the alternating current charging pile can be determined to be illegal. Illustratively, the pilot state determining device of the controller integrated in the pilot state determining system may uniformly take 4000 voltage AD values every 20ms, and average every 5us samples, where the minimum duty cycle of the PWM wave output by the controller is 5%, that is, the minimum high level time in 1000us (1 ms) is 50us, the more the number of 50us samples is better and not less than 2 points (half of the points are allowed to be interfered), the minimum DMA period of the controller is 5us, the sampling period is 5us, where the half of the points are allowed to be interfered, and the minimum qualified sampling frequency of 1ms is 10 times, and the minimum qualified sampling frequency of 20ms is 200 times.
It should be noted that the foregoing preset minimum acceptable sampling times are only illustrative, and may be specifically determined according to the actual performance of the charging pile, which is not limited herein.
According to the guide state determining method for the alternating current charging pile, the interval range of the guide line voltage corresponding to the determined guide state is converted into the register interval range, the guide state of the alternating current charging pile is determined according to the register interval range and the guide line voltage, the register interval range is not easy to interfere compared with the existing calculated voltage value, a large number of guide line voltages are not required to be collected for many times, the guide state can be determined for 20ms, and therefore the reliability of determination of the guide state is guaranteed, and the efficiency is improved.
Example III
Fig. 4 is a block diagram of a guiding state determining device for an ac charging pile according to a third embodiment of the present invention. The guidance state determination device includes: an information acquisition module 310, an interval determination module 320, and a state determination module 330. The information obtaining module 310 is configured to obtain a table corresponding to the voltage and the guiding state of the guiding line and the voltage sampling value of the ac charging pile; the interval determining module 320 is configured to determine an interval range of the guide line voltage corresponding to the guide state according to the guide state and the voltage sampling value correspondence table; the state determining module 330 is configured to convert the range of the pilot line voltage into a register range, and determine the pilot state of the ac charging pile according to the register range and the pilot line voltage.
Optionally, the interval determining module 320 includes: a sampling value determining unit and an interval determining unit; the sampling value determining unit is used for determining voltage sampling values corresponding to all the guiding states of the alternating-current charging pile according to the guiding state and voltage sampling value corresponding table; the interval determining unit is used for determining the interval range of the guide wire voltage according to the voltage sampling value and the preset voltage adjusting value.
In one embodiment, the state determination module 330 includes: a section conversion unit and a range determination unit; the interval conversion unit is used for converting the interval range of the guide line voltage according to the interval range of the guide line voltage and a preset corresponding relation to obtain a converted interval range; the range determination unit is configured to use the converted section range as a register section range.
Optionally, the state determining module 330 includes: a frequency determining unit and a state determining unit; the frequency determining unit is used for determining the frequency of the register interval range corresponding to the guide wire voltage according to the register interval range and the guide wire voltage; the state determining unit is used for taking the guiding state corresponding to the register interval range as the guiding state of the alternating current charging pile if the frequency of the register interval range is the maximum value of the frequency of each register interval range and is larger than the preset minimum qualified sampling frequency. The guide line voltage is the guide line voltage collected in real time, and the frequency of the register interval range is the frequency of the guide line voltage in the interval range of the guide line voltage corresponding to the collected register interval range.
Preferably, the above state unit is further configured to determine that the guiding state of the ac charging pile is illegal if the frequency of the register interval range is less than the preset minimum qualified sampling number.
An embodiment of the present invention provides an ac charging stake including a guidance state determining device as described in the second aspect.
The device and the method for determining the guiding state of the ac charging pile provided by the embodiment belong to the same inventive concept, have corresponding beneficial effects, and are not detailed in the embodiment.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A guidance state determining method of an ac charging pile, comprising:
acquiring a guide wire voltage and a guide state and voltage sampling value correspondence table of an alternating-current charging pile;
determining the interval range of the guide wire voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table;
and converting the interval range of the guide line voltage into a register interval range, and determining the guide state of the alternating current charging pile according to the register interval range and the guide line voltage.
2. The guidance state determining method according to claim 1, wherein determining the range of the guidance line voltage corresponding to the guidance state according to the table of the guidance state and the voltage sampling value comprises:
determining voltage sampling values corresponding to the guiding states of the alternating-current charging piles according to the guiding state and voltage sampling value corresponding table;
and determining the interval range of the guide wire voltage according to the voltage sampling value and a preset voltage adjustment value.
3. The guidance state determination method according to claim 1, wherein the converting the range of the guidance line voltage into the register range of the section includes:
converting the interval range of the guide line voltage according to the interval range of the guide line voltage and a preset corresponding relation to obtain a converted interval range;
and taking the converted interval range as the register interval range.
4. The guidance state determination method according to claim 1, wherein the determining the guidance state of the ac charging stake according to the register interval range and the guidance line voltage includes:
determining the frequency of the register interval range corresponding to the guide line voltage according to the register interval range and the guide line voltage;
and if the frequency of the register interval range is the maximum value of the frequencies of the register interval ranges and is larger than the preset minimum qualified sampling times, taking the guide state corresponding to the register interval range as the guide state of the alternating current charging pile.
5. The method according to claim 4, wherein before the frequency of the register interval ranges is the maximum value of the frequencies of the register interval ranges, the method comprises:
and if the frequency of the register interval range is smaller than the preset minimum qualified sampling frequency, determining that the guiding state of the alternating current charging pile is illegal.
6. The guidance state determination method according to claim 4, wherein the guidance line voltage is a guidance line voltage collected in real time, and the frequency of the register interval range is a frequency of guidance line voltages in an interval range of the guidance line voltages corresponding to the collected register interval range.
7. The guidance state determination method of claim 1, wherein the guidance state includes at least one of idle, connected, charged, and illegitimate.
8. A guidance state determining apparatus of an ac charging pile, comprising:
the information acquisition module is used for acquiring the guide wire voltage and the guide state of the alternating-current charging pile and a corresponding table of voltage sampling values;
the interval determining module is used for determining the interval range of the guide wire voltage corresponding to the guide state according to the guide state and voltage sampling value corresponding table;
and the state determining module is used for converting the interval range of the guide line voltage into a register interval range and determining the guide state of the alternating current charging pile according to the register interval range and the guide line voltage.
9. The guidance state determination apparatus of claim 8, wherein the section determination module comprises:
the sampling value determining unit is used for determining voltage sampling values corresponding to the guiding states of the alternating current charging pile according to the guiding state and voltage sampling value corresponding table;
and the interval determining unit is used for determining the interval range of the guide wire voltage according to the voltage sampling value and a preset voltage adjusting value.
10. An ac charging pile comprising a guidance state determining apparatus as claimed in any one of claims 8 to 9.
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