CN115946559B - Charging pile charging current adjusting method and device and charging pile - Google Patents
Charging pile charging current adjusting method and device and charging pile Download PDFInfo
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- CN115946559B CN115946559B CN202211679333.2A CN202211679333A CN115946559B CN 115946559 B CN115946559 B CN 115946559B CN 202211679333 A CN202211679333 A CN 202211679333A CN 115946559 B CN115946559 B CN 115946559B
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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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Abstract
The embodiment of the invention discloses a charging pile charging current adjusting method and device and a charging pile. The method for adjusting the charging current of the charging pile comprises the following steps: detecting the current temperature of a temperature detection point in the charging pile; the temperature of a temperature detection point in the charging pile is detected according to a preset frequency; determining a charging current gear at the next moment of the charging pile according to the current temperature of the temperature detection point; adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature detection point, so that the problem that the electric pile is damaged due to the fact that the temperature of the charging pile is too high when the charging pile is charged is avoided, and the maximum charging power of the charging pile can be realized under the condition of normal operation.
Description
Technical Field
The embodiment of the invention relates to the technical field of current regulation, in particular to a charging pile charging current regulating method and device and a charging pile.
Background
With the maturation and popularization of electric automobile technology, the safety, stability and reliability of household alternating-current charging piles are becoming more and more important. The household charging pile is generally installed outdoors, and the environmental problem is high when the charging pile body is in standby under the direct irradiation of sunlight in high-temperature weather. When the charging pile charges the vehicle at full power, the temperature rise of components and parts during the superposition of the ambient temperature and charging can cause the damage of the components and parts of the charging pile and even the burning of the charging pile.
In the prior art, some charging piles have no temperature monitoring and protecting function, and the charging piles have hidden troubles of damaging or even burning out components caused by overhigh temperature; some charging piles have a temperature monitoring protection function, but charging is stopped immediately when the temperature is higher than a certain temperature, so that the problem that the vehicle cannot be charged under the condition of high ambient temperature is caused.
Disclosure of Invention
The embodiment of the invention provides a charging pile charging current adjusting method, an adjusting device and a charging pile, which avoid the problem of damage to an electric pile caused by overhigh temperature of the charging pile when the charging pile is charged, and ensure that the charging pile can realize maximum charging power under the condition of normal working.
According to an aspect of the present invention, there is provided a method for adjusting a charging current of a charging pile, the method comprising:
detecting the current temperature of a temperature detection point in the charging pile; the temperature of a temperature detection point in the charging pile is detected according to a preset frequency;
Determining a charging current gear at the next moment of the charging pile according to the current temperature of the temperature detection point;
adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature sensing point.
Further, according to the current temperature of the temperature detection point, determining a charging current gear of the charging pile at the next moment, wherein the charging current adjusting method of the charging pile comprises the following steps:
determining the current charging current gear of the charging pile;
Judging whether the current temperature of the temperature detection point is greater than a first preset temperature;
If the current temperature of the temperature detection point is greater than the first preset temperature, reducing the charging current gear of at least one gear on the basis of the current charging current gear, and determining the charging current gear as the charging current gear of the next moment of the charging pile.
Further, the method for adjusting the charging current of the charging pile before determining the charging current gear of at least one gear to be the charging current gear of the charging pile at the next moment based on the current charging current gear further comprises the following steps:
Judging whether the current charging current gear of the charging pile is the lowest gear or not; if yes, the charging pile is controlled to continue to charge according to the lowest gear.
Further, the method for adjusting the charging current of the charging pile further comprises the following steps:
If the current temperature of the temperature detection point is smaller than the first preset temperature, the charging current gear of at least one gear is increased on the basis of the current charging current gear, and the charging current gear at the next moment of the charging pile is determined.
Further, the charging current gear of at least one gear is increased on the basis of the current charging current gear, and before the charging current gear of the next moment of the charging pile is determined, the charging current adjusting method of the charging pile further comprises the following steps:
judging whether the current charging current gear of the charging pile is the highest gear or not;
if yes, the charging pile is controlled to output charging current according to the current charging current gear.
Further, the method for adjusting the charging current of the charging pile further comprises the following steps:
Judging whether the current temperature of the temperature detection point is greater than a second preset temperature; if the charging speed is greater than the preset value, controlling the charging pile to stop charging; wherein the second preset temperature is greater than the first preset temperature.
Further, detecting the temperature of a temperature detection point in the charging pile, and the charging pile charging current adjusting method comprises the following steps:
Detecting the temperature of Yi Reyuan devices in the charging pile through a temperature sensor; wherein, the easy hot components and parts include at least one of relay, contactor, live wire binding post, zero line binding post and MCU.
Further, the method for adjusting the charging current of the charging pile further comprises the following steps:
acquiring the ambient temperature of the charging pile, and adjusting the detection frequency of the temperature detection point according to the ambient temperature; wherein the detection frequency of the temperature detection point is inversely related to the ambient temperature.
According to another aspect of the present invention, there is provided a charging pile charging current adjusting device, including:
The temperature detection unit is used for detecting the current temperature of a temperature detection point in the charging pile; the temperature of a temperature detection point in the charging pile is detected according to a preset frequency;
The current gear determining unit is used for determining a charging current gear at the next moment of the charging pile according to the current temperature of the temperature detecting point;
the charging current adjusting unit is used for adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature sensing point.
According to another aspect of the present invention, there is provided a charging pile including the charging pile charging current adjusting device.
According to the embodiment of the invention, the temperature of the temperature detection point in the charging pile is detected according to the preset frequency, the charging current of the charging pile is dynamically regulated through the temperature of the temperature detection point, and the charging current gear is set, so that the charging current of the charging pile can be dynamically regulated more accurately through the temperature of the temperature detection point, the problem of damage of the charging pile caused by overhigh temperature of the charging pile when the charging pile is charged is avoided, and the maximum charging power of the charging pile under the normal working condition is ensured.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for adjusting charging current of a charging pile according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for adjusting charging current of a charging pile according to an embodiment of the present invention;
Fig. 3 is a flowchart of a method for adjusting a charging current of a charging pile according to an embodiment of the present invention;
Fig. 4 is a flowchart of another method for adjusting charging current of a charging pile according to an embodiment of the present invention;
fig. 5 is a flowchart of another method for adjusting charging current of a charging pile according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a temperature interval gear of another method for adjusting charging current of a charging pile according to an embodiment of the present invention;
Fig. 7 is a schematic diagram of a charging current gear of a method for adjusting a charging current of a charging pile according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a charging current adjusting device for a charging pile according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to the method for adjusting the charging current of the charging pile provided by the embodiment of the invention, fig. 1 is a flowchart of the method for adjusting the charging current of the charging pile provided by the embodiment of the invention, and referring to fig. 1, the method specifically comprises the following specific steps:
s110, detecting the current temperature of a temperature detection point in the charging pile; the temperature of the temperature detection point in the charging pile is detected according to a preset frequency.
The preset frequency can be understood as a time interval between two detection points for detecting the temperature in the charging pile. The environmental temperature of the charging pile can be obtained, and the detection frequency of the temperature detection point is adjusted according to the environmental temperature; wherein the detection frequency of the temperature detection point is inversely related to the ambient temperature. The method is characterized in that in summer, the temperature is hot, the preset frequency can be set more frequently, so that the gear of the charging pile can be quickly adjusted, and further, when the temperature of the charging pile is high, the charging current can be quickly reduced, and therefore the probability of damage to components of the charging pile and even burning of the charging pile caused by the fact that the temperature of the components is too high can be reduced; in winter, weather is cold, and the temperature is too low, can reduce the frequency of presetting the frequency setting for charging current can slowly be adjusted, when can satisfy the demand that reduces because of the probability that the electric pile components and parts damage and even the electric pile burns out that cause because of the components and parts temperature is too high, guarantee the stability that the electric pile charges, when setting up initial charging current as the highest charging current, can be under the prerequisite of guaranteeing not having the potential safety hazard, the at utmost improves charging efficiency. Specifically, the temperature detection point can be designed on or near the surface of the component easy to heat, and the component easy to heat can be a key component easy to overheat, such as a relay, a contactor, a live wire wiring terminal, a zero wire wiring terminal, an MCU and the like.
And S120, determining a charging current gear at the next moment of the charging pile according to the current temperature of the temperature detection point.
The number of the charging current gears may be three, four, five, etc., which is not limited in the embodiment of the present invention. Specifically, the number of charging current gears may be consistent, and for example, four charging current gears may be used for control at all times, five charging current gears may be used for control at all times, and the embodiment of the present invention is not limited thereto. The number of the charging current gears can be adjusted according to the change of the external temperature, and in winter, the weather is cold and the air temperature is too low, more charging current gears can be selected for control, because the external temperature is low, the initial temperature of the charging pile is low, the charging pile can perform better heat transfer at the low external temperature due to heat generated by working, the temperature change of a temperature detection point is relatively quick, more charging current gears are combined with preset frequency, and the charging efficiency is improved to the greatest extent on the premise of ensuring no potential safety hazard; in summer, the weather is hot, the temperature is too high, fewer charging current gears can be selected for control, because the external temperature is higher, the initial temperature of the charging pile is higher, the fewer charging current gears are combined with preset frequency, the magnitude of each reduction of the charging current can be increased under the condition that the temperature in the charging pile is higher, and the cooling speed of the charging pile is increased on the premise that the charging pile can be charged normally.
S130, adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment, wherein each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature sensing point.
Specifically, the charging current gear can be selected according to the external temperature, and corresponds to a charging current value or a charging current range, and when the external temperature is low, the potential safety hazard of the charging pile is small, the requirement on the charging current is not too high, and the charging current gear can be set to be a charging current range; when external temperature is higher, the potential safety hazard of the charging pile is relatively larger, the requirement on charging current needs to be accurate, and the charging current gear can be set to be a charging current.
According to the embodiment of the invention, the temperature of the temperature detection point in the charging pile is detected according to the preset frequency, the charging current of the charging pile is dynamically regulated through the temperature of the temperature detection point, and the charging current gear is set, so that the charging current of the charging pile can be dynamically regulated more accurately through the temperature of the temperature detection point, the problem of damage of the charging pile caused by overhigh temperature of the charging pile when the charging pile is charged is avoided, and the maximum charging power of the charging pile under the normal working condition is ensured.
Example two
Fig. 2 is a flowchart of another method for adjusting charging current of a charging pile according to an embodiment of the present invention, where based on the foregoing technical solutions of the embodiments, the step of determining a charging current gear at a next moment of a charging pile according to a current temperature of a temperature detection point is mainly refined, and a preferred implementation of the method for adjusting charging current of a charging pile is provided, as shown in fig. 2, and specifically includes the following specific steps:
S210, detecting the current temperature of a temperature detection point in the charging pile; the temperature of the temperature detection point in the charging pile is detected according to a preset frequency.
S220, determining the current charging current gear of the charging pile.
Specifically, the current charging current gear of the charging pile can be determined according to the charging current output by the charging pile.
S230, judging whether the current temperature of the temperature detection point is larger than a first preset temperature.
It can be understood that the charging current gear of the next moment of the charging pile is determined according to the temperature interval to which the current temperature of the temperature detection point belongs. The temperature interval set in the pile body of the charging pile can be exemplified by setting two temperature comparison values, namely three temperature intervals; three temperature comparison values, i.e., five temperature intervals, etc., may also be set, which are not illustrated in the embodiment of the present invention. The first preset temperature may be understood as a temperature comparison value set in the pile body of the charging pile, that is, a certain boundary value of the temperature interval. When the current temperature of the temperature detection point is greater than the first preset temperature, the temperature of the charging pile is required to be reduced.
And S240, if the current temperature of the temperature detection point is greater than the first preset temperature, reducing the charging current gear of at least one gear on the basis of the current charging current gear, and determining the charging current gear as the charging current gear of the next moment of the charging pile.
Specifically, for the setting situation of more than four charging current gears, when the temperature is not greatly different from the first preset temperature, one gear can be reduced, and when the temperature is greatly different from the first preset temperature, two gears can be reduced, and for example, when the current temperature of the temperature detection point is greater than the first preset temperature and is less than 10 ℃, one charging current gear can be reduced for charging on the basis of the current charging gear; when the current temperature of the temperature detection point exceeds the first preset temperature by 10 ℃, two charging current gears can be reduced for charging and the like based on the current charging gear.
S250, adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature sensing point.
According to the embodiment of the invention, the step of determining the charging current gear at the next moment of the charging pile according to the current temperature of the temperature detection point is refined, and the current temperature of the temperature detection point is compared with the first preset temperature by setting different charging current gears, so that the temperature of the temperature detection point can be quickly classified, the down-shift adjustment of the charging current of the charging pile is realized, the problem of damage of the electric pile caused by overhigh temperature of the charging pile when the charging pile is charged is avoided, and the maximum charging power of the charging pile under the condition of normal working is ensured.
Optionally, the method for adjusting the charging current of the charging pile further includes, before determining the charging current gear of at least one gear to be the charging current gear of the charging pile at the next moment based on the current charging current gear, the method further includes:
judging whether the current charging current gear of the charging pile is the lowest gear or not; if yes, the charging pile is controlled to continue to charge according to the lowest gear.
Specifically, when the current charging gear of the charging pile is the lowest charging gear set in the pile body of the charging pile, if the upper limit of the temperature detection point in the charging pile is not met, the potential safety hazard that the components of the charging pile are damaged or even the charging pile is burnt does not exist, and the charging can be performed by the charging current of the lowest charging gear; if the temperature of the temperature detection point in the charging pile exceeds the upper temperature limit, the potential safety hazard that the components of the charging pile are damaged or even the charging pile burns out exists, and the charging pile needs to be controlled to stop charging.
Example III
Fig. 3 is a flowchart of another method for adjusting charging current of a charging pile according to an embodiment of the present invention, where the technical solution of the embodiment of the present invention is optimized based on the technical solution of the embodiment of the present invention, and a preferred implementation of the method for adjusting charging current of a charging pile is provided, as shown in fig. 3, and the method specifically includes the following specific steps:
s310, detecting the current temperature of a temperature detection point in the charging pile; the temperature of the temperature detection point in the charging pile is detected according to a preset frequency.
S320, determining the current charging current gear of the charging pile.
S330, judging whether the current temperature of the temperature detection point is greater than a first preset temperature.
And S341, if the current temperature of the temperature detection point is greater than the first preset temperature, reducing the charging current gear of at least one gear on the basis of the current charging current gear, and determining the charging current gear as the charging current gear of the next moment of the charging pile. If step S341 is not satisfied, step S342 is performed.
And S342, if the current temperature of the temperature detection point is smaller than the first preset temperature, increasing the charging current gear by at least one gear on the basis of the current charging current gear, and determining the charging current gear as the charging current gear at the next moment of the charging pile.
Specifically, for setting conditions of more than four charging current gears, when the temperature is not greatly different from the first preset temperature, one gear can be increased, and when the temperature is greatly different from the first preset temperature, two gears can be increased, and for example, when the current temperature of the temperature detection point is smaller than the first preset temperature and is less than 10 ℃, one charging current gear can be increased for charging on the basis of the current charging gear; when the current temperature of the temperature detection point is smaller than the first preset temperature and the difference is more than 10 ℃, two charging current gears can be raised to charge on the basis of the current charging gear, and the method for determining the charging current gear at the next moment of the charging pile through the current temperature of the current temperature detection point is not illustrated one by one.
When the external temperature is reduced to the lowest preset temperature, the lowest preset temperature can be set to 0 ℃ by way of example, and two charging current gears are preferably increased for upward adjustment, and one charging current gear is reduced for downward adjustment; when the external temperature rises to the highest preset temperature, the lowest preset temperature can be set to 30 ℃ by way of example, preferably, the two-gear charging current gear is reduced for downward adjustment, and the first-gear charging current gear is increased for upward adjustment; when the external temperature is between the lowest preset temperature and the highest preset temperature, the charging current gear is preferably adjusted in a first gear. The charging current gear is adjusted in first gear and first gear, so that the maximum charging power can be realized on the premise of ensuring that the charging pile has no potential safety hazard, and the charging requirement of a customer is further met.
S350, adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature sensing point.
According to the embodiment of the invention, by setting different charging current gears and the first preset temperature, the current temperature of the temperature detection point is compared with the first preset temperature, so that the temperature of the temperature detection point can be quickly classified, the dynamic adjustment of the charging current of the charging pile is realized, the problem of damage of the charging pile caused by overhigh temperature of the charging pile when the charging pile is charged is avoided, and the maximum charging power of the charging pile under the normal working condition is ensured.
Optionally, the method for adjusting the charging current of the charging pile before determining the charging current gear of at least one gear to be the charging current gear of the next moment of the charging pile based on the current charging current gear further comprises:
judging whether the current charging current gear of the charging pile is the highest gear or not;
if yes, the charging pile is controlled to output charging current according to the current charging current gear.
Wherein the highest gear is the highest gear of the charging current. Specifically, when the current charging current gear of the charging pile is the highest gear, the charging current cannot be increased continuously at the moment, and the charging current is output continuously according to the current charging current gear, so that the charging pile can realize the maximum charging power under the condition of normal operation.
Optionally, the method for adjusting the charging current of the charging pile further includes:
Judging whether the current temperature of the temperature detection point is greater than a second preset temperature; if the charging speed is greater than the preset value, controlling the charging pile to stop charging; wherein the second preset temperature is greater than the first preset temperature.
The second preset temperature is an upper limit value of one temperature comparison value set in the pile body of the charging pile, and specifically, the second preset temperature is set in more than three temperature intervals. When the current temperature of the temperature detection point is greater than the second preset temperature, the fact that the temperature of the charging pile is too high is indicated, the components of the charging pile are damaged, even the charging pile is burnt out, and the charging pile needs to be controlled to stop charging at the moment.
Optionally, detecting the temperature of the temperature detection point in the charging pile includes:
Detecting the temperature of Yi Reyuan devices in the charging pile through a temperature sensor; wherein, the easy hot components and parts include at least one of relay, contactor, live wire binding post, zero line binding post and MCU.
The temperature sensor may be an infrared temperature sensor, a digital temperature sensor, etc., which is not limited in the embodiment of the present invention. Specifically, one temperature sensor can be used for detecting the temperature of all the components easy to heat, and multiple temperature sensors can be used for detecting the temperature of different components easy to heat. The heat-susceptible components comprise at least one of a relay, a contactor, a live wire wiring terminal, a zero line wiring terminal and an MCU, and the selection of the number of the heat-susceptible components can be determined according to specific environments, and the heat-susceptible components can be selected to be subjected to temperature detection in summer, hot weather and overhigh temperature, so that the probability of damage to the charging pile components and even burning of the charging pile caused by overhigh temperature of the components can be reduced; in winter, the weather is cold, the temperature is too low, only one of the components easy to heat can be selected for temperature detection, and at the moment, although the detected components easy to heat are fewer, the probability of damage to the components of the charging pile and even burning of the charging pile caused by too high temperature of the components can be reduced; in spring and autumn, can select the easy hot components and parts quantity more than winter and less than summer, can satisfy the demand that reduces because of the too high temperature of components and parts, fills electric pile components and parts damage and even fills electric pile and burn out probability of stake.
When the number of the detection points is two or more, the average temperature of different detection points can be compared with the preset temperature of the system, the highest temperature of different detection points can be compared with the preset temperature of the system, and a specific comparison method can be selected according to practical conditions. When the external temperature is lower and the temperature difference of each detection point is not large, the average temperature of different detection points is compared with the preset temperature of the system, so that the maximum charging power of the charging pile can be realized under the normal working condition of the charging pile.
Optionally, the method for adjusting the charging current of the charging pile further includes:
acquiring the ambient temperature of the charging pile, and adjusting the detection frequency of the temperature detection point according to the ambient temperature; wherein the detection frequency of the temperature detection point is inversely related to the ambient temperature.
Specifically, when the ambient temperature is higher, the heat dissipation of the charging pile is slower, the temperature of an internal temperature detection point is easy to be overhigh, the detection frequency of the temperature of the higher temperature detection point is set, and the phenomena that the components of the charging pile are damaged and even the charging pile is burnt out due to the overhigh temperature of the components can be avoided; when the ambient temperature is lower, the heat dissipation of the charging pile is faster, the temperature of an internal temperature detection point is difficult to be too high, the detection frequency of the temperature of the lower temperature detection point is set, and the phenomena that the components of the charging pile are damaged and even the charging pile is burnt due to the fact that the temperature of the components is too high can be avoided.
Example IV
Fig. 4 is a flowchart of another method for adjusting charging current of a charging pile according to an embodiment of the present invention, and referring to fig. 4, the method for adjusting charging current of a charging pile specifically includes the following steps:
s410, detecting the current temperature T.
S420, judging whether the current temperature T is greater than T0; if not, executing step S421; if yes, go to step S430.
S421, judging whether the current charging current gear is the highest gear; if not, go to step S422; if yes, step S423 is executed.
S422, increasing the first-gear charging current gear output current; the process returns to step S410.
S423, continuing to output current at the highest gear; the process returns to step S410.
S430, judging whether the current temperature T is greater than T1; if not, go to step S431; if yes, go to step S440.
S431, judging whether the current charging current gear is the lowest gear; if not, executing step S432; if yes, go to step S433.
S432, reducing the first-gear charging point current gear output current; the process returns to step S410.
S433, continuously outputting current at the lowest gear; step S434 is performed.
S434, judging whether the current temperature T is greater than T1; if not, continuing to execute the step S433; if yes, go to step S440.
S440, ending the charging.
Fig. 5 is a flowchart of another method for adjusting a charging current of a charging pile according to an embodiment of the present invention, and fig. 6 is a schematic diagram of a temperature interval of another method for adjusting a charging current of a charging pile according to an embodiment of the present invention; fig. 7 is a schematic diagram of a charging current gear of a method for adjusting a charging current of a charging pile according to an embodiment of the present invention; in the embodiment of the invention, taking three temperature intervals and five charging current gears as examples, a method for adjusting charging current of a charging pile is described in detail, and with reference to fig. 5,6 and 7, the method is described in detail as follows:
Setting a first preset temperature T0 and a second preset temperature T1, wherein the first preset temperature T0 and the second preset temperature T1 are contained in three temperature intervals shown in fig. 6, and a temperature interval gear less than T0 can be understood as a normal temperature interval, and a non-maximum current charging attempt increases a charging current belonging interval; the temperature interval gear of T0-T1 can be understood as a temperature interval in which the charging current gear needs to be reduced until the current temperature of the temperature detection point in the charging pile enters the temperature interval gear smaller than T0; a temperature interval greater than T1 may be understood as an over-temperature interval, at which charging should be stopped. Setting a first charging current gear Imax, a second charging current gear a Imax, a third charging current gear b Imax, a fourth charging current gear c Imax, and a fifth charging current gear Imin, wherein 0 < c < b < a < 1, so that the first charging current gear Imax is greater than the second charging current gear a Imax is greater than the third charging current gear b Imax is greater than the fourth charging current gear c is greater than the fifth charging current gear Imin. Wherein Imax is the maximum charging current supported by the charging pile; imin can be the minimum charging current which can be represented by PWM specified by national standard or the minimum charging current which is set by oneself, and the embodiment of the invention is not limited to the minimum charging current; the charging currents of the middle three charging current gears can be calculated according to the maximum charging current supported by the charging pile, can be determined according to the minimum charging current, and can be set by themselves, and the embodiment of the invention is not limited to this. The method comprises the steps of opening a switch of a charging pile, inserting a gun into a charging port of an automobile, starting charging, firstly charging with a first charging current gear Imax, and keeping for a period of time, wherein the period of time can be 2 minutes, 3 minutes and 5 minutes, the method is not limited, then judging whether the highest temperature of a detection point is smaller than T0, if the highest temperature of the detection point is smaller than T0, continuously charging with the first charging current gear Imax, judging once every a period of time, and the method is not limited. If the highest temperature of the detection point is greater than T0, judging whether the highest temperature of the detection point is greater than T1 in the next stage, and if the highest temperature of the detection point is greater than T1, ending the charging of the charging pile. If the highest temperature at the detection point is less than T1, it is indicated that the highest temperature at the detection point is between T0 and T1, the charging pile charges with the second charging current gear a×imax, and the charging pile is maintained for a period of time, which may be, for example, 2 minutes, 3 minutes, or 5 minutes. If the highest temperature of the detection point is greater than T0, judging whether the highest temperature of the detection point is greater than T1 in the next stage, and if the highest temperature of the detection point is greater than T1, ending the charging of the charging pile. If the highest temperature at the detection point is less than T1, it is indicated that the highest temperature at the detection point is between T0 and T1, and the charging pile is charged with the third charging current gear b x Imax, and the charging pile is maintained for a period of time, which may be, for example, 2 minutes, 3 minutes, and 5 minutes. If the highest temperature of the detection point is greater than T0, judging whether the highest temperature of the detection point is greater than T1 in the next stage, and if the highest temperature of the detection point is greater than T1, ending the charging of the charging pile. If the highest temperature at the detection point is less than T1, it is indicated that the highest temperature at the detection point is between T0 and T1, and the charging pile is charged with a fourth charging current gear c x Imax, and the charging pile is maintained for a period of time, which may be, for example, 2 minutes, 3 minutes, or 5 minutes. If the highest temperature of the detection point is greater than T0, judging whether the highest temperature of the detection point is greater than T1 in the next stage, and if the highest temperature of the detection point is greater than T1, ending the charging of the charging pile. If the highest temperature at the detection point is less than T1, the charging pile charges with the fifth charging current gear Imin, and the charging pile is maintained for a period of time, which may be, for example, 2 minutes, 3 minutes, or 5 minutes, which is not limited by the embodiment of the present invention, and then it is determined whether the highest temperature at the detection point is less than T0, if the highest temperature at the detection point is less than T0, the charging current gear is up-regulated to the fourth charging current gear c×imax for charging, and the cycle of the previous stage is performed. If the highest temperature of the detection point is greater than T0, judging whether the highest temperature of the detection point is greater than T1 or not in the next stage, if the highest temperature of the detection point is greater than T1, ending the charging of the charging pile, and if the highest temperature of the detection point is less than T1, continuing to charge the charging pile by the fifth charging current gear Imin.
Example five
Fig. 8 is a schematic structural diagram of a charging pile charging current adjusting device according to an embodiment of the present invention, and as shown in fig. 8, a charging pile charging current adjusting device 100 includes:
A temperature detection unit 101 for detecting a current temperature of a temperature detection point in the charging pile; the temperature of a temperature detection point in the charging pile is detected according to a preset frequency;
A current gear determining unit 102, configured to determine a charging current gear at a next moment of the charging pile according to a current temperature of the temperature detecting point;
A charging current adjusting unit 103, configured to adjust a charging current of the charging pile according to a charging current gear at a next moment of the charging pile; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature sensing point.
Further, the charging current adjusting unit 103 is specifically configured to:
determining the current charging current gear of the charging pile;
Judging whether the current temperature of the temperature detection point is greater than a first preset temperature;
If the current temperature of the temperature detection point is greater than the first preset temperature, reducing the charging current gear of at least one gear on the basis of the current charging current gear, and determining the charging current gear as the charging current gear of the next moment of the charging pile.
Further, the charging current adjusting unit 103 further includes:
The lowest gear judging module is used for judging whether the current charging current gear of the charging pile is the lowest gear or not before determining the charging current gear which is lowered by one gear on the basis of the current charging current gear as the charging current gear at the next moment of the charging pile; if yes, the charging pile is controlled to continue to charge according to the lowest gear.
Further, the charging current adjusting unit 103 is specifically configured to:
If the current temperature of the temperature detection point is smaller than the first preset temperature, the charging current gear of at least one gear is increased on the basis of the current charging current gear, and the charging current gear at the next moment of the charging pile is determined.
Further, the charging current adjusting unit 103 further includes:
the highest gear judging module is used for judging whether the current charging current gear of the charging pile is the highest gear before the charging current gear of at least one gear is increased on the basis of the current charging current gear and is determined to be the charging current gear of the charging pile at the next moment;
if yes, the charging pile is controlled to output charging current according to the current charging current gear.
Further, the charging current adjusting unit 103 is specifically configured to:
Judging whether the current temperature of the temperature detection point is greater than a second preset temperature; if the charging speed is greater than the preset value, controlling the charging pile to stop charging; wherein the second preset temperature is greater than the first preset temperature.
Further, the temperature detection unit 101 is specifically configured to:
detecting the temperature of Yi Reyuan devices in the charging pile through a temperature sensor; wherein, the easy hot components and parts include at least one of relay, contactor, live wire binding post, zero line binding post and MCU.
Further, the temperature detection unit 101 is specifically configured to:
acquiring the ambient temperature of the charging pile, and adjusting the detection frequency of the temperature detection point according to the ambient temperature; wherein the detection frequency of the temperature detection point is inversely related to the ambient temperature.
The charging pile charging current adjusting device provided by the embodiment of the invention can execute the charging pile charging current adjusting method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the executing method.
Example six
The embodiment of the invention provides a charging pile, which comprises the charging pile charging current adjusting device provided by the embodiment.
According to the embodiment of the invention, the temperature of the temperature detection point in the charging pile is detected according to the preset frequency, the charging current of the charging pile is dynamically regulated through the temperature of the temperature detection point, and the charging current gear is set, so that the charging current of the charging pile can be dynamically regulated more accurately through the temperature of the temperature detection point, the problem of damage of the charging pile caused by overhigh temperature of the charging pile when the charging pile is charged is avoided, and the maximum charging power of the charging pile under the normal working condition is ensured.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (4)
1. A method for adjusting charging current of a charging pile, comprising:
detecting the current temperature of a temperature detection point in the charging pile; the temperature of the temperature detection point in the charging pile is detected according to a preset frequency;
Determining a charging current gear of the charging pile at the next moment according to the current temperature of the temperature detection point;
adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature detection point;
Acquiring the ambient temperature of the charging pile, and adjusting the detection frequency of the temperature detection point according to the ambient temperature; wherein the detection frequency of the temperature detection point temperature is positively correlated with the ambient temperature;
Detecting a temperature of a temperature detection point in the charging pile, comprising:
detecting the temperature of Yi Reyuan devices in the charging pile through a temperature sensor; the heat-susceptible component comprises at least one of a relay, a contactor, a live wire wiring terminal, a zero wire wiring terminal and an MCU;
Determining the number of Yi Reyuan devices according to the ambient temperature;
When the number of the detection points is two or more, comparing the highest temperature of different detection points with a preset temperature when the environmental temperature is greater than an environmental temperature threshold value, and determining a charging current gear at the next moment of the charging pile according to a comparison result; when the ambient temperature is less than or equal to an ambient temperature threshold value and the temperature difference value of each detection point is less than a first threshold value, comparing the average temperature of different detection points with a preset temperature, and determining a charging current gear at the next moment of the charging pile according to a comparison result;
According to the current temperature of the temperature detection point, determining the charging current gear of the charging pile at the next moment comprises the following steps:
determining the current charging current gear of the charging pile;
judging whether the current temperature of the temperature detection point is greater than a first preset temperature or not;
if the current temperature of the temperature detection point is greater than a first preset temperature, reducing the charging current gear of at least one gear on the basis of the current charging current gear, and determining the charging current gear as the charging current gear of the charging pile at the next moment;
and determining the charging current gear which is reduced by at least one gear on the basis of the current charging current gear as the charging current gear at the next moment of the charging pile, and further comprising:
judging whether the current charging current gear of the charging pile is the lowest gear or not; if yes, the charging pile is controlled to continue to charge according to the lowest gear;
when the current charging gear of the charging pile is the lowest charging gear set in the pile body of the charging pile, if the highest temperature of the temperature detection point is smaller than or equal to the preset temperature, the charging pile is controlled to charge with the charging current of the lowest charging gear; if the highest temperature of the temperature detection point is higher than the preset temperature, controlling the charging pile to stop charging;
The charging pile charging current adjusting method further comprises the following steps:
If the current temperature of the temperature detection point is smaller than a first preset temperature, raising the charging current gear of at least one gear on the basis of the current charging current gear, and determining the charging current gear as the charging current gear at the next moment of the charging pile;
And determining the charging current gear which is increased by at least one gear on the basis of the current charging current gear as the charging current gear at the next moment of the charging pile, and further comprising:
Judging whether the current charging current gear of the charging pile is the highest gear or not;
And if yes, controlling the charging pile to output charging current according to the current charging current gear.
2. The method for adjusting a charging current of a charging pile according to claim 1, further comprising:
Judging whether the current temperature of the temperature detection point is greater than a second preset temperature or not; if the charging speed is greater than the preset value, controlling the charging pile to stop charging; wherein the second preset temperature is greater than the first preset temperature.
3. A charging pile charging current adjusting device, comprising:
the temperature detection unit is used for detecting the current temperature of a temperature detection point in the charging pile; the temperature of the temperature detection point in the charging pile is detected according to a preset frequency;
The current gear determining unit is used for determining a charging current gear at the next moment of the charging pile according to the current temperature of the temperature detecting point;
The charging current adjusting unit is used for adjusting the charging current of the charging pile according to the charging current gear of the charging pile at the next moment; each charging current gear corresponds to a charging current or a charging current range; the charging current is inversely related to the temperature of the temperature detection point;
the charging pile charging current adjusting device is used for executing the charging pile charging current adjusting method according to any one of claims 1-2.
4. A charging pile comprising the charging pile charging current adjusting device according to claim 3.
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| EP3524466A1 (en) * | 2018-02-13 | 2019-08-14 | Toyota Jidosha Kabushiki Kaisha | Vehicle and electric power control device for vehicle |
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