CN113263939A - Automobile charging pile power supply method and charging pile - Google Patents
Automobile charging pile power supply method and charging pile Download PDFInfo
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- CN113263939A CN113263939A CN202110814896.7A CN202110814896A CN113263939A CN 113263939 A CN113263939 A CN 113263939A CN 202110814896 A CN202110814896 A CN 202110814896A CN 113263939 A CN113263939 A CN 113263939A
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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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- 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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- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for 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
- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of electric automobile charging, in particular to an automobile charging pile power supply method and a charging pile, which comprise the following steps: detecting the power supply state of the charging pile and acquiring the charging state of the charging pile on the automobile; when the power supply state of the charging pile is power off, acquiring the power off time of the charging pile; when the power supply state of the charging pile is power supply recovery, judging the type of the clock module, and obtaining the power supply recovery time of the charging pile according to the type of the clock module; calculating the actual power failure time of the charging pile according to the power supply recovery time and the power failure time; the method has the advantages of automatically recovering the system time of the charging pile, and breaks through the bottleneck that the charging state of the automobile cannot be recovered after the charging pile is powered off.
Description
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to an automobile charging pile power supply method and a charging pile.
Background
Along with the popularization of new energy electric vehicles, the intelligent charging technology of the charging pile is also rapidly developing. The charging post equipment is usually powered by standard household 220V ac power. However, the power failure phenomenon often appears in the domestic power supply, especially the electric power interruption appears during the power consumption peak, and in case of power failure, fill electric pile and will cut off the power supply, stop to charge new forms of energy electric automobile, even recovered electric power system's power supply very fast, under the condition of charging of not having personnel to authorize again, fill electric pile and can only remain and stop the charged state, make new forms of energy electric automobile's battery under the state that is not fully charged, influence new forms of energy electric automobile's the completion efficiency that charges, fill the inside system time of electric pile simultaneously and also can be along with the appearance of outage condition, stop the timing, lead to outside power supply to resume the back, system time is unusual.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the power supply method for the automobile charging pile and the charging pile, which have the advantage of automatically recovering the system time of the charging pile and break through the bottleneck that the charging state of the automobile cannot be recovered after the charging pile is powered off.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a power supply method for an automobile charging pile comprises the following steps:
detecting the power supply state of the charging pile and acquiring the charging state of the charging pile on the automobile;
when the power supply state of the charging pile is power-off, judging the type of the clock module, and acquiring the power-off time of the charging pile;
when the power supply state of the charging pile is power supply recovery, obtaining the power supply recovery time of the charging pile according to the type of the clock module;
if the type of the clock module is the external clock, reading the time of the external clock when the charging pile recovers power supply, and defining the time as power supply recovery time;
if the type of the clock module is the built-in clock, initializing the built-in clock when the charging pile recovers power supply to obtain initialization time;
acquiring network time, and calculating power supply recovery time according to the network time and the initialization time;
calculating the actual power failure time of the charging pile according to the power supply recovery time and the power failure time;
and judging whether an authorized charging action is started or not according to the actual power failure time and the charging state of the automobile before the power failure of the charging pile, and calibrating the system time of the charging pile.
Optionally, the detecting the power supply state of the charging pile includes the following steps:
initializing an entering low-voltage filtering counter and an exiting low-voltage filtering counter;
collecting the voltage of an input power supply at the frequency of T seconds/time, and calculating an average voltage effective value once every time T1;
setting a reference voltage effective value, judging the reference voltage effective value and the average voltage effective value, and adjusting the values entering a low-voltage filtering counter and exiting the low-voltage filtering counter according to the reference voltage effective value and the average voltage effective value;
and obtaining whether the power supply of the external power supply of the charging pile is normal or not according to the values of the entering low-voltage filtering counter and the exiting low-voltage filtering counter.
Optionally, the adjusting the values entering the low-voltage filtering counter and exiting the low-voltage filtering counter according to the magnitude of the reference voltage effective value and the average voltage effective value includes the following steps:
if the effective value of the average voltage is smaller than the effective value of the reference voltage, adding 1 to the numerical value of the low-voltage filtering counter, and setting the numerical value of the low-voltage filtering counter;
and if the average voltage effective value is greater than or equal to the reference voltage effective value, setting the value of the entering low-voltage filtering counter, and adding 1 to the value of the exiting low-voltage filtering counter.
Optionally, obtaining whether the external power supply of the charging pile is normal or not according to the values of the entering low-voltage filtering counter and the exiting low-voltage filtering counter, and including the following steps:
setting a threshold value D1, and if the value entering the low-voltage filtering counter is greater than or equal to the threshold value D1, the power supply state of the charging pile is power off; if the value entering the low-voltage filtering counter is smaller than D1, continuing to acquire the voltage of the input power supply;
and setting a threshold value D2, and if the value of the exiting low-voltage filtering counter is greater than or equal to the threshold value D2, the power supply state of the charging pile is power supply recovery.
Optionally, the acquiring the network time includes the following steps:
starting a GPS module, a 4G module and a Bluetooth module;
judging whether the GPS module is connected to the satellite signal, if so, reading the time of the GPS module as network time;
if the GPS module is not connected to the satellite signal, judging whether the 4G module is connected to the cloud platform or not, and if the 4G module is connected to the cloud platform, reading the cloud platform time as network time;
if the 4G module is not connected to the cloud platform, judging whether the Bluetooth module is connected to a Bluetooth equipment terminal, and if the Bluetooth module is connected to the Bluetooth equipment terminal, reading the terminal time of the Bluetooth equipment as network time;
if the Bluetooth module is not connected to the Bluetooth equipment terminal, whether the GPS module is connected to the satellite signal or not is continuously judged.
Optionally, calculating power supply recovery time according to the network time and the initialization time, including the following steps:
setting the time displayed on the built-in clock as the current connection time when the network time is acquired;
calculating a time difference according to the current connection time and the initialization time, wherein the calculation formula of the time difference is as follows: time difference = current connection time-initialization time;
and setting the initial read value of the acquired network time as the starting time, and then, the power supply recovery time = starting time-time difference.
Optionally, the determining whether to start an authorized charging action includes the following steps:
setting a threshold value T2, and if the actual power-down time is less than or equal to T2 and the charging state before the power-down of the charging pile is in the charging process, starting an authorized charging action by the charging pile;
if the actual power-down time is less than or equal to T2 and the charging state before the power-off of the charging pile is uncharged, the charging pile does not start the authorized charging action;
and if the actual power-down time is greater than the threshold T2, the charging pile does not start the authorized charging action.
Optionally, the method for calibrating the system time of the charging pile includes the following steps:
calculating relative time according to the network time and the current time displayed on the clock module;
setting a threshold value D3, and if the relative time is greater than the threshold value D3, setting the network time as the system time of the charging pile; and if the relative time is less than or equal to the threshold D3, using the current time of the clock module as the system time of the charging pile.
Optionally, the method comprises the following steps:
when network time is acquired, initializing a first counter to 0;
the value of the counter I is increased by one when the Bluetooth module judges that the Bluetooth module is not connected to the Bluetooth equipment terminal once;
setting a threshold value K, if the value of the counter I is larger than or equal to the threshold value K, not calibrating the system time of the charging pile, and not starting an authorized charging action by the charging pile; and if the numerical value of the counter I is smaller than the threshold value K, continuously acquiring the network time.
Optionally, when calculating the power failure time, the power supply recovery time, the initialization time, the network time and the actual power failure time, the numerical values of year, month, day and time are converted into numerical values using time as a unit, and the numerical values of minutes and seconds are converted into numerical values using seconds as a unit.
A charging pile comprises a control module, an EEPROM module, a clock module, a communication module, an entering low-voltage filtering counter, an exiting low-voltage filtering counter, an electric power storage module, a network time module and a first counter, wherein the EEPROM module, the clock module, the communication module, the entering low-voltage filtering counter, the exiting low-voltage filtering counter, the electric power storage module, the network time module and the first counter are all connected with the control module;
the EEPROM module is used for storing the power-off time and the charging state of the charging pile to the automobile;
the clock module is used for recording power-off time, power supply recovery time and initialization time;
the power storage module is used for supplying power to the control module;
the communication module is used for reading the time data of the clock module;
the network time module is used for acquiring network time.
Optionally, the clock module includes an internal clock and an external clock.
Optionally, the network time module includes a GPS module, a 4G module, and a bluetooth module.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the method comprises the steps of calculating the power failure time of a charging pile through an external clock or an internal clock, obtaining the charging state of the charging pile before power failure, executing whether the charging pile continues to charge the automobile according to the power failure time and the charging state before power failure, setting a network time module to calibrate the system time of the charging pile after external power supply is recovered, optimizing a time calculation method and reducing the calculation load of a charging pile controller when the power failure time is calculated, and the technical scheme provided by the invention is suitable for the charging pile configured with the external clock and is also suitable for the charging pile only configured with the internal clock.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a power supply method for an automobile charging pile and a flow chart of the method for the charging pile provided by the embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
As shown in fig. 1, an automobile charging pile power supply method and a charging pile comprise the following steps: the power supply state of the charging pile is detected, the charging state of the charging pile to the automobile is obtained, and the power supply state of the charging pile is detected, and the method comprises the following steps: initializing an entering low-voltage filtering counter and an exiting low-voltage filtering counter; the voltage of the input power supply is collected at a frequency of T seconds/time, and an average voltage effective value is calculated every time T1.
The voltage value of the charging pile power supply is input through AD sampling, the acquisition frequency T can be set to be 1 millisecond, T1 can be set to be 5, namely, the voltage of the input power supply is acquired once every 5 milliseconds, the average value of the voltage of the input power supply acquired five times is calculated by taking five times of acquisition as a unit, and the average value is the effective value of the average voltage.
Setting a reference voltage effective value, judging the reference voltage effective value and the average voltage effective value, and adjusting the values entering and exiting the low-voltage filtering counter according to the reference voltage effective value and the average voltage effective value.
According to the magnitude of the reference voltage effective value and the average voltage effective value, the numerical value of entering the low-voltage filtering counter and exiting the low-voltage filtering counter is adjusted, and the method comprises the following steps: if the effective value of the average voltage is smaller than the effective value of the reference voltage, adding 1 to the numerical value of the low-voltage filtering counter, and setting the numerical value of the low-voltage filtering counter; if the average voltage effective value is greater than or equal to the reference voltage effective value, setting the value of the low-voltage filtering counter, and adding 1 to the value of the low-voltage filtering counter
For example, when the effective value of the reference voltage is set to 150V, if the effective value of the average voltage is less than 150V, the value entering the low-voltage filtering counter is incremented by 1, and the value exiting the low-voltage filtering counter is set to 0, and if the effective value of the average voltage is greater than or equal to 150V, the value entering the low-voltage filtering counter is set to 0, and the value exiting the low-voltage filtering counter is incremented by 1.
According to the numerical value that gets into low pressure filtering counter and withdraw from low pressure filtering counter, whether reach and fill electric pile external power source power supply normal, including the following step: setting a threshold value D1, and if the value entering the low-voltage filtering counter is greater than or equal to the threshold value D1, the power supply state of the charging pile is power off; and if the value entering the low-voltage filtering counter is less than D1, continuing to acquire the voltage of the input power supply.
The threshold value D1 may be set to 6, that is, the low voltage lasts for 30 milliseconds, if the value entering the low voltage filtering counter is greater than or equal to 6, it is determined that the power supply state of the charging pile is power off, if the value entering the low voltage filtering counter is less than 6, the voltage of the input power supply is continuously collected, and after the power supply state of the charging pile is detected, the charging state of the charging pile to the automobile is obtained, where the charging state includes two states of charging and non-charging.
When the power supply state of the charging pile is the power failure, the type of the clock module is judged, the power failure time of the charging pile is obtained, namely when the charging pile is powered off, the charging pile obtains the power failure time according to whether the clock module is an internal clock or an external clock, if the clock module is the external clock, the controller reads the power failure time displayed on the external clock through the communication module and stores the power failure time into a storage of the charging pile, and if the clock module is the internal clock, the power failure time displayed on the internal clock is directly stored into the storage.
When the power supply state of the charging pile is power restoration, the power supply restoration time of the charging pile is obtained according to the type of the clock module, wherein the method for judging the power supply state of the charging pile to be power restoration is that the average value of the voltages of the input power supplies acquired five times, namely the effective value of the average voltage, is calculated in a mode that the voltages of the input power supplies are acquired once every 1 millisecond and the five-time acquisition is taken as a unit.
And after the average voltage effective value is calculated, the average voltage effective value is compared with the reference voltage effective value in the same way, namely if the average voltage effective value is less than 150V, the value entering the low-voltage filtering counter is added with 1, and the value exiting the low-voltage filtering counter is set to be 0, if the average voltage effective value is more than or equal to 150V, the value entering the low-voltage filtering counter is set to be 0, and the value exiting the low-voltage filtering counter is added with 1.
Setting a threshold value D2, if the value of the low-voltage filter exit counter is greater than or equal to the threshold value D2, the power supply state of the charging pile is power supply recovery, setting the threshold value D2 to be 200, namely, the normal voltage lasts for 1 second, and if the value of the low-voltage filter exit counter is greater than or equal to 200, determining that the power supply state of the charging pile is power supply recovery.
If the type of the clock module is the external clock, the time of the external clock is read when the charging pile recovers power supply, and is defined as power supply recovery time, namely the controller reads the time displayed on the external clock through the communication module, and the displayed time is the power supply recovery time and is stored in the memory.
If the type of the clock module is the built-in clock, when the charging pile recovers power supply, the built-in clock is initialized to obtain initialization time, and if the initialization time is set to be 0 minute 0 second at 1 month, 1 day, 0 hour in 2020, the initialization time can be set to be any time before the current time period, and the initialization time can be set manually at will.
The method comprises the following steps of obtaining network time, calculating power supply recovery time according to the network time and initialization time, and obtaining the network time: starting a GPS module, a 4G module and a Bluetooth module; judging whether the GPS module is connected to the satellite signal, if so, reading the time of the GPS module as network time; if the GPS module is not connected to the satellite signal, judging whether the 4G module is connected to the cloud platform or not, and if the 4G module is connected to the cloud platform, reading the cloud platform time as network time; if the 4G module is not connected to the cloud platform, judging whether the Bluetooth module is connected to a Bluetooth equipment terminal, and if the Bluetooth module is connected to the Bluetooth equipment terminal, reading the terminal time of the Bluetooth equipment as network time; if the Bluetooth module is not connected to the Bluetooth equipment terminal, whether the GPS module is connected to the satellite signal or not is continuously judged.
When the network time is acquired, the priority of the GPS module is higher than that of the 4G module, the priority of the 4G module is higher than that of the Bluetooth module, and if more than two types of network time with different priorities are acquired simultaneously, the network time with the high priority is taken as the standard, for example, if the GPS module and the 4G module are connected to respective connection signals simultaneously, the GPS module time with the high priority is selected as the network time.
When network time is acquired, initializing a first counter to 0; the value of the counter I is increased by one when the Bluetooth module judges that the Bluetooth module is not connected to the Bluetooth equipment terminal once; setting a threshold value K, if the value of the counter I is larger than or equal to the threshold value K, not calibrating the system time of the charging pile, and not starting an authorized charging action by the charging pile; and if the numerical value of the counter I is smaller than the threshold value K, continuously acquiring the network time.
The period of each change of the value of the first counter is 1 second, the threshold value K can be set to 600, namely 10 minutes is used as a boundary, if the value of the first counter is greater than or equal to 600, the time that the network time module is not read by the controller is determined, the network time module is possibly abnormal, time calibration is not carried out, authorized charging action is not started, manual judgment is carried out after the owner returns, and if the value of the first counter is less than 600, the time of the network time module is continuously read.
Furthermore, when the network time is acquired, the time correction counter is initialized to 0, the value of the time correction counter changes once every 5 seconds, if the currently acquired network time is A and the network time before the acquisition of A is B, the priority relationship of the two network times is judged firstly, wherein A and B are one of a GPS module, a 4G module and a Bluetooth module, and if the priority of A is higher than that of B, the A with the higher priority is selected as the final network time, and the system time of the charging pile is calibrated by taking A as the calibration time;
if the priorities of the A and the B are equal, judging whether the value of the time correction counter is greater than 12 (namely 1 minute), if the value of the time correction counter is greater than 12, conforming to the condition of calibrating the system time of the charging pile and allowing time correction; if the value of the timing counter is less than or equal to 12, the condition for calibrating the system time of the charging pile is not met, and the network time needs to be continuously acquired;
if the priority of the A is lower than that of the B, whether a time correction counter is larger than 120 (10 minutes) or not is judged, and if the priority of the A is larger than that of the B, the condition of calibrating the system time of the charging pile is met, and time correction is allowed; if the value of the timing counter is less than or equal to 120, the condition for calibrating the system time of the charging pile is not met, and the network time needs to be continuously acquired.
Calculating power supply recovery time according to the network time and the initialization time, comprising the following steps: setting the time displayed on the built-in clock as the current connection time when the network time is acquired; calculating the time difference according to the current connection time and the initialization time, wherein the calculation formula of the time difference is as follows: time difference = current connection time-initialization time; and setting the initial read value of the acquired network time as the starting time, and then, the power supply recovery time = starting time-time difference.
Calculating the actual power failure time of the charging pile according to the power supply recovery time and the power failure time, wherein the calculation formula is as follows: actual power down time = power restoration time-power down time.
According to the actual time of falling the power supply and the state of charge to the car before filling electric pile outage, judge whether start the action of charging of authorizing to system time to filling electric pile calibrates, judge whether start the action of charging of authorizing, including the following step: setting a threshold value T2, and if the actual power-down time is less than or equal to T2 and the charging state before the power-down of the charging pile is in the charging process, starting an authorized charging action by the charging pile; if the actual power-down time is less than or equal to T2 and the charging state before the power-off of the charging pile is uncharged, the charging pile does not start the authorized charging action; if the actual power-down time is larger than the threshold value T2, the charging pile does not start the authorized charging action
The T2 can be set independently according to the actual situation of the vehicle owner, if the T2 can be set to 600 seconds, when the actual power-down time is less than or equal to 600 seconds, and the charging state of the vehicle before the power-off of the charging pile is in charging, the condition that the charging pile starts the authorized charging action is met, so that the charging pile continues to charge the electric vehicle, manual confirmation is not needed, the situation that the charging pile is not timely charged due to the fact that the vehicle owner does not know the power-down situation of the charging pile is prevented, when the actual power-down time is less than or equal to 600 seconds, and the charging state of the vehicle before the power-off of the charging pile is not charged, no operation is needed, and when the actual power-down time is greater than 600 seconds, the condition that the charging pile starts the authorized charging action is also not met, and therefore no operation is needed.
Specifically, it is first determined whether the number of hours of the power-off time is equal to the number of hours of the power restoration time, if the power supply time and the power failure time are equal, subtracting the second of the power supply recovery time from the second of the power failure time to obtain the actual power failure time, meanwhile, whether the actual power-down time is less than or equal to 600 seconds (10 minutes) is judged, if the actual power-down time is less than or equal to 600 seconds, judging the charging state of the automobile before the power failure of the charging pile, if the charging state of the automobile before the power failure of the charging pile is in the charging process, meeting the condition that the charging pile starts authorized charging action, thereby leading the charging pile to continuously charge the electric automobile without manual confirmation, preventing the owner from knowing the power-off condition of the charging pile, the charging pile is used for charging the electric automobile in a non-timely manner, and if the charging state of the automobile is not charged before the power failure of the charging pile, the system time of the charging pile is calibrated.
If the hours of the power failure time are not equal to the hours of the power supply recovery time, judging whether the hours of the power supply recovery time are equal to the hours of the power failure time plus 1, if the hours of the power supply recovery time are equal to the hours of the power failure time plus 1, adding 3600 seconds (1 hour) to the seconds of the power failure time, then subtracting the seconds of the power failure time from the seconds of the power supply recovery time plus the seconds of 3600 seconds to obtain the actual power failure time, then judging whether the actual power failure time is less than or equal to 600 seconds (10 minutes), if the actual power failure time is less than or equal to 600 seconds, judging the charging state of the automobile before the power failure of the charging pile, if the charging state of the automobile before the power failure of the charging pile is in charging, meeting the condition that the charging pile starts authorized charging action, so that the charging pile continues to charge the electric automobile without manual confirmation, the situation that the charging pile charges the electric automobile untimely is prevented from occurring due to the fact that an owner does not know the condition of power failure of the charging pile, and if the charging state of the automobile is not charged before the power failure of the charging pile, the system time of the charging pile is calibrated.
The method for calibrating the system time of the charging pile comprises the following steps: calculating relative time according to the network time and the current time displayed on the clock module; setting a threshold value D3, and if the relative time is greater than the threshold value D3, setting the network time as the system time of the charging pile; if the relative time is less than or equal to the threshold value D3, the current time of the clock module is used as the system time of the charging pile, so that the system time of the charging pile after power supply is recovered can be calibrated no matter the charging pile uses an external clock or an internal clock.
In the calculation, when the power failure time, the power supply recovery time, the initialization time, the network time and the actual power failure time are calculated, the numerical values of year, month, day and time are converted into numerical values in units of time, and the numerical values of minute and second are converted into numerical values in units of second, for example, if the initialization time is set to be 1 month, 0 day, 1 minute and 30 seconds in 2020, the calculation method of converting the 1 month, 1 day, 0 day in 2020 into the numerical values in units of time is as follows: 2020 × 365 × 24+1 × 30 × 24+1 × 24+0= 17695944; the calculation for converting 1 minute and 30 seconds into a numerical value in seconds is: 1 × 60+30=90 seconds.
A charging pile comprises a control module, an EEPROM module, a clock module, a communication module, a low-voltage filter counter exit counter, an electric power storage module, a network time module and a first counter, wherein the EEPROM module, the clock module, the communication module, the low-voltage filter counter entry counter, the low-voltage filter counter exit counter, the electric power storage module, the network time module and the first counter are all connected with the control module.
The EEPROM module is used for storing the power-off time and the charging state of the charging pile to the automobile; the clock module is used for recording power-off time, power supply recovery time and initialization time; the power storage module is used for supplying power to the control module; the communication module is used for reading the time data of the clock module; the network time module is used for acquiring network time.
The charging pile comprises a charging pile body, a charging module, a control module, a clock module, a network time module and a charging post, wherein the charging pile body comprises a charging pile body, the charging pile body comprises a charging battery, the charging pile body comprises a clock module and a charging post, the clock module comprises an internal clock and an external clock, the network time module comprises a GPS module, a 4G module and a Bluetooth module, the control module is a controller, the EEPROM module is a storage, and the charging pile body is a capacitor.
The electric power storage module is the electric power storage capacitor, and when charging pile outside lost power, the electric power storage capacitor can continue to provide power supply for the controller normally works, and the electric power storage capacitor can carry out about 800 milliseconds of power supply to the controller, the above-mentioned charging pile power supply method only needs the electric power storage capacitor to supply power for 500 milliseconds can realize to the controller.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the invention which are described in the patent conception of the invention are included in the protection scope of the patent of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (13)
1. A power supply method for an automobile charging pile is characterized by comprising the following steps:
detecting the power supply state of the charging pile and acquiring the charging state of the charging pile on the automobile;
when the power supply state of the charging pile is power-off, judging the type of the clock module, and acquiring the power-off time of the charging pile;
when the power supply state of the charging pile is power supply recovery, obtaining the power supply recovery time of the charging pile according to the type of the clock module;
if the type of the clock module is the external clock, reading the time of the external clock when the charging pile recovers power supply, and defining the time as power supply recovery time;
if the type of the clock module is the built-in clock, initializing the built-in clock when the charging pile recovers power supply to obtain initialization time;
acquiring network time, and calculating power supply recovery time according to the network time and the initialization time;
calculating the actual power failure time of the charging pile according to the power supply recovery time and the power failure time;
and judging whether an authorized charging action is started or not according to the actual power failure time and the charging state of the automobile before the power failure of the charging pile, and calibrating the system time of the charging pile.
2. The method for supplying power to the automobile charging pile according to claim 1, wherein the power supply state of the charging pile is detected, and the method comprises the following steps:
initializing an entering low-voltage filtering counter and an exiting low-voltage filtering counter;
collecting the voltage of an input power supply at the frequency of T seconds/time, and calculating an average voltage effective value once every time T1;
setting a reference voltage effective value, judging the reference voltage effective value and the average voltage effective value, and adjusting the values entering a low-voltage filtering counter and exiting the low-voltage filtering counter according to the reference voltage effective value and the average voltage effective value;
and obtaining whether the power supply of the external power supply of the charging pile is normal or not according to the values of the entering low-voltage filtering counter and the exiting low-voltage filtering counter.
3. The method for supplying power to the charging pile of the automobile as claimed in claim 2, wherein the values entering the low voltage filtering counter and exiting the low voltage filtering counter are adjusted according to the magnitude of the effective value of the reference voltage and the effective value of the average voltage, and the method comprises the following steps:
if the effective value of the average voltage is smaller than the effective value of the reference voltage, adding 1 to the numerical value of the low-voltage filtering counter, and setting the numerical value of the low-voltage filtering counter;
and if the average voltage effective value is greater than or equal to the reference voltage effective value, setting the value of the entering low-voltage filtering counter, and adding 1 to the value of the exiting low-voltage filtering counter.
4. The method for supplying power to the automobile charging pile according to claim 2, wherein whether the external power supply of the charging pile is normal or not is obtained according to the values of the entering low-voltage filtering counter and the exiting low-voltage filtering counter, and the method comprises the following steps:
setting a threshold value D1, and if the value entering the low-voltage filtering counter is greater than or equal to the threshold value D1, the power supply state of the charging pile is power off; if the value entering the low-voltage filtering counter is smaller than D1, continuing to acquire the voltage of the input power supply;
and setting a threshold value D2, and if the value of the exiting low-voltage filtering counter is greater than or equal to the threshold value D2, the power supply state of the charging pile is power supply recovery.
5. The method for supplying power to the automobile charging pile according to claim 1, wherein the step of acquiring the network time comprises the following steps:
starting a GPS module, a 4G module and a Bluetooth module;
judging whether the GPS module is connected to the satellite signal, if so, reading the time of the GPS module as network time;
if the GPS module is not connected to the satellite signal, judging whether the 4G module is connected to the cloud platform or not, and if the 4G module is connected to the cloud platform, reading the cloud platform time as network time;
if the 4G module is not connected to the cloud platform, judging whether the Bluetooth module is connected to a Bluetooth equipment terminal, and if the Bluetooth module is connected to the Bluetooth equipment terminal, reading the terminal time of the Bluetooth equipment as network time;
if the Bluetooth module is not connected to the Bluetooth equipment terminal, whether the GPS module is connected to the satellite signal or not is continuously judged.
6. The method for supplying power to the automobile charging pile according to claim 1, wherein power supply recovery time is calculated according to the network time and the initialization time, and the method comprises the following steps:
setting the time displayed on the built-in clock as the current connection time when the network time is acquired;
calculating a time difference according to the current connection time and the initialization time, wherein the calculation formula of the time difference is as follows: time difference = current connection time-initialization time;
and setting the initial read value of the acquired network time as the starting time, and then, the power supply recovery time = starting time-time difference.
7. The method for supplying power to the automobile charging pile according to claim 1, wherein the step of judging whether to start an authorized charging action comprises the following steps:
setting a threshold value T2, and if the actual power-down time is less than or equal to T2 and the charging state before the power-down of the charging pile is in the charging process, starting an authorized charging action by the charging pile;
if the actual power-down time is less than or equal to T2 and the charging state before the power-off of the charging pile is uncharged, the charging pile does not start the authorized charging action;
and if the actual power-down time is greater than the threshold T2, the charging pile does not start the authorized charging action.
8. The method for supplying power to the charging post of the automobile as claimed in claim 1, wherein the system time of the charging post is calibrated, and the method comprises the following steps:
calculating relative time according to the network time and the current time displayed on the clock module;
setting a threshold value D3, and if the relative time is greater than the threshold value D3, setting the network time as the system time of the charging pile; and if the relative time is less than or equal to the threshold D3, using the current time of the clock module as the system time of the charging pile.
9. The method for supplying power to the automobile charging pile according to claim 5, further comprising the following steps:
when network time is acquired, initializing a first counter to 0;
the value of the counter I is increased by one when the Bluetooth module judges that the Bluetooth module is not connected to the Bluetooth equipment terminal once;
setting a threshold value K, if the value of the counter I is larger than or equal to the threshold value K, not calibrating the system time of the charging pile, and not starting an authorized charging action by the charging pile; and if the numerical value of the counter I is smaller than the threshold value K, continuously acquiring the network time.
10. The method according to claim 1, wherein the power failure time, the power supply recovery time, the initialization time, the network time and the actual power failure time are calculated by converting numerical values representing year, month, day and hour into numerical values in units of time, and converting numerical values of minutes and seconds into numerical values in units of seconds.
11. A charging pile is characterized by comprising a control module, an EEPROM module, a clock module, a communication module, a low-voltage entering filter counter, a low-voltage exiting filter counter, an electric power storage module, a network time module and a first counter, wherein the EEPROM module, the clock module, the communication module, the low-voltage entering filter counter, the low-voltage exiting filter counter, the electric power storage module, the network time module and the first counter are all connected with the control module;
the EEPROM module is used for storing the power-off time and the charging state of the charging pile to the automobile;
the clock module is used for recording power-off time, power supply recovery time and initialization time;
the power storage module is used for supplying power to the control module;
the communication module is used for reading the time data of the clock module;
the network time module is used for acquiring network time.
12. A charging pile according to claim 11, characterised in that the clock module includes an internal clock and an external clock.
13. A charging pile according to claim 11, characterised in that the network time module includes a GPS module, a 4G module and a bluetooth module.
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