CN112706642A - Battery monitoring method of charging pile capable of quickly changing energy storage power supply - Google Patents
Battery monitoring method of charging pile capable of quickly changing energy storage power supply Download PDFInfo
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- CN112706642A CN112706642A CN202011540583.9A CN202011540583A CN112706642A CN 112706642 A CN112706642 A CN 112706642A CN 202011540583 A CN202011540583 A CN 202011540583A CN 112706642 A CN112706642 A CN 112706642A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 238000004146 energy storage Methods 0.000 title claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 41
- 230000002159 abnormal effect Effects 0.000 claims description 26
- 230000007613 environmental effect Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000010287 polarization Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a battery monitoring method of a charging pile capable of quickly changing an energy storage power supply. The method comprises the following steps: acquiring the residual electric quantity of a battery in a charging pile, wherein the battery is connected with a charging gun and is used as a power source for charging the electric automobile by the charging gun; and when the residual electric quantity is equal to or smaller than a preset electric quantity threshold value, executing a reminding operation, wherein the reminding operation is used for reminding that the electric quantity of the battery is insufficient.
Description
Technical Field
The invention relates to the technical field of charging piles, in particular to a battery monitoring method of a charging pile capable of quickly changing an energy storage power supply.
Background
When charging, the existing charging pile mostly utilizes commercial power to charge the electric automobile, the dependence of the charging pile on the commercial power is strong, and once the commercial power is cut off, the charging pile can not exert the charging function. It would be important to provide a technique that reduces the dependence on mains electricity and that ensures a sufficient supply of power.
Disclosure of Invention
The embodiment of the invention provides a battery monitoring method for a charging pile capable of quickly replacing an energy storage power supply.
The embodiment of the invention provides a battery monitoring method for a charging pile capable of quickly replacing an energy storage power supply, which comprises the following steps:
acquiring the residual electric quantity of a battery in a charging pile, wherein the battery is connected with a charging gun and is used as a power source for charging the electric automobile by the charging gun;
and when the residual electric quantity is equal to or less than a preset electric quantity threshold value, executing a reminding operation, wherein the reminding operation is used for reminding that the electric quantity of the battery is insufficient.
In one embodiment, after the performing of the reminding operation, the method further includes:
when the charging gun is used for charging an external electric automobile, the current discharging speed of a battery of the charging pile is obtained in real time, and the current charging speed of an automobile battery of the electric automobile is obtained in real time;
judging whether a charging abnormal condition exists at present according to the current discharging speed of the charging pile battery, the current charging speed of the automobile battery and a preset first fitting relation between the discharging speed of the charging pile battery corresponding to the automobile model of the electric automobile and the charging speed of the automobile battery;
and when the abnormal condition exists, sending preset reminding information to a user side corresponding to the electric automobile, wherein the preset reminding information is used for reminding that the abnormal charging condition exists at present.
In one embodiment, the determining whether an abnormal charging condition exists currently according to the current discharging speed of the charging pile battery, the current charging speed of the automobile battery, and a preset first fitting relationship between the discharging speed of the charging pile battery corresponding to the automobile model of the electric automobile and the charging speed of the automobile battery includes:
judging whether two parameters, namely the current discharging speed of the charging pile battery and the current charging speed of the automobile battery, are matched with a first fitting relation between the discharging speed of the charging pile battery corresponding to the preset automobile model of the electric automobile and the charging speed of the automobile battery;
if the charging conditions are matched, determining that no abnormal charging condition exists currently;
and if not, determining that the charging abnormal condition exists currently.
In one embodiment, the determining whether an abnormal charging condition exists currently according to the current discharging speed of the charging pile battery, the current charging speed of the automobile battery, and a preset first fitting relationship between the discharging speed of the charging pile battery corresponding to the automobile model of the electric automobile and the charging speed of the automobile battery includes:
acquiring the current discharging speed, the current residual electric quantity and the current temperature of the charging pile battery;
acquiring the current charging speed, the current residual capacity and the current temperature of an automobile battery of the electric automobile;
acquiring a preset second fitting relation among the discharging speed, the residual electric quantity and the charging pile battery temperature of the charging pile battery corresponding to the automobile model of the electric automobile, the charging speed, the residual electric quantity and the automobile battery temperature of the automobile battery;
judging whether the current discharging speed, the current residual capacity and the current temperature of the charging pile battery and the relation among the six parameters of the current charging speed, the current residual capacity and the current temperature of the automobile battery of the electric automobile accord with the second fitting relation or not;
if not, judging that the charging abnormal condition exists currently.
In one embodiment, after the performing of the reminding operation, the method further includes:
in the process that the charging gun charges the electric automobile, acquiring a first preset parameter of a battery in the charging pile and a second preset parameter of the electric automobile, wherein the first preset parameter comprises any one or more of battery vibration strength, battery moving speed, battery temperature and external pressure born by the battery; the second preset parameter comprises any one or more of the vibration intensity of the automobile battery, the moving speed of the automobile, the temperature of the automobile battery and the external pressure born by the automobile battery;
judging whether to control to stop the power supply of the battery in the charging pile to the charging gun or not according to a first preset parameter of the battery in the charging pile and a second preset parameter of the electric vehicle;
and when the judgment result is yes, controlling to stop the power supply of the battery in the charging pile to the charging gun, and sending a charging interruption prompt to a preset terminal device, wherein the terminal device comprises a management terminal used by a charging pile manager and/or a driver terminal used by a driver of the electric automobile.
In one embodiment, the determining whether to control to stop the power supply from the battery in the charging pile to the charging gun according to a first preset parameter of the battery in the charging pile and a second preset parameter of the electric vehicle includes:
determining charging safety factor alpha of charging pile at t moment by using the following formulas (1) and (2)tAnd automobile charging safety factor betat：
Wherein, delta1To represent
The weight coefficient corresponding to the calculation item is a preset value, and the value range is (0, 1); delta2To represent
The weight coefficient corresponding to the calculation item is a preset value, and the value range is (0, 1); and delta1+δ2＝1；RtiThe value of the ith first preset parameter of the charging pile battery at the time t is represented; ri0The preset maximum value of the ith first preset parameter representing the charging pile battery; epsiloniThe weighting coefficient corresponding to the ith first preset parameter of the charging pile battery is represented, and the value range is [0,1 ]]And is and
Ytjthe value of the jth second preset parameter of the automobile battery at the time t is represented; y isj0The preset maximum value of the jth second preset parameter of the automobile battery is represented; lambda [ alpha ]jRepresenting the weight coefficient corresponding to the jth second preset parameter of the automobile battery, and the value rangeIs [0,1 ]]And is and
u represents the total number of the first preset parameters; j represents the total number of the second preset parameters;
judgment of alphatThe magnitude relation between the first preset threshold values and the corresponding first preset threshold values, and the judgment betatThe magnitude relation between the first preset threshold and the corresponding second preset threshold;
when alpha istEqual to or greater than a first preset threshold value and/or betatAnd when the voltage is equal to or larger than a second preset threshold value, the battery in the charging pile is determined to be controlled to stop supplying power to the charging gun.
In one embodiment, after the performing of the reminding operation, the method further includes:
a1, marking the moment when the charging pile battery is charged for the last time as 0 moment, and monitoring the charging and discharging current value of the charging pile battery from 0 moment to t moment;
step a2, determining a theoretical remaining capacity reference value of the battery according to the following formula (3):
wherein Q istDividing the time from 0 moment to t moment into h time periods according to a preset time interval, and determining the average value of the charging pile battery current in each time period, wherein the charging pile battery current is a positive number when the charging pile battery discharges, and the charging pile battery current is a negative number when the charging pile battery charges; i is0-hThe sum of the average values of the current of the charging pile batteries in the h time periods, UdThe power-off voltage of the charging pile battery is represented by R1, the ohmic internal resistance of the battery in the charging pile is represented by R2, and the polarization internal resistance of the battery in the charging pile is represented by R2;
step A3, determining and acquiring the environmental electric quantity of the charging pile battery according to the following formula (3):
wherein, WtThe environmental electric quantity of the charging pile battery at the moment t is obtained; sgn () is a sign function when
When the value of (b) is greater than 0, the function value is 1, when
Is 0 when the value of (b) is equal to 0, and is equal to 0 when the value of (b) is less than
The function value is-1 when the value of (d) is less than 0,
λ is a historical average discharge voltage of the charging pile battery, Sc represents a total historical charging frequency of the charging pile battery up to the time T, Smax is a preset maximum chargeable frequency of the charging pile battery, and T1 is a temperature of an environment where the charging pile is located currently; min (25, T1) represents taking the minimum of the two values 25 and T1;
and A4, judging whether the value of the environment electric quantity is smaller than a preset environment electric quantity threshold value, if so, executing a reminding operation, wherein the reminding operation is used for reminding a manager of the charging pile, and the charging and discharging times of the battery of the charging pile should be controlled so as to prolong the service life of the battery.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a battery monitoring method for a charging pile capable of quickly changing an energy storage power supply according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment of the invention provides a battery monitoring method for a charging pile capable of quickly changing an energy storage power supply, which comprises the following steps of S1-S2:
step S1, acquiring the residual electric quantity of a battery in a charging pile, wherein the battery is connected with a charging gun and is used as a power source for the charging gun to charge the electric automobile;
and step S2, when the residual capacity is equal to or less than the preset capacity threshold, executing a reminding operation, wherein the reminding operation is used for reminding that the capacity of the battery is insufficient.
The beneficial effects of the above technical scheme are: the charging pile is internally provided with a replaceable battery, the residual electric quantity of the battery is monitored in real time by utilizing the technical means, and when the residual electric quantity of the battery is too small, a prompt is given. According to the technical scheme, the commercial power does not need to be excessively relied on, a plurality of batteries only need to be prepared, and when the electric quantity of the battery in the charging pile is insufficient, the other battery which is fully charged is replaced; in addition, can also remind the battery power not enough when suitable to prepare in advance and change the battery, improve the work efficiency who fills electric pile.
In one embodiment, the method may further include:
when the charging gun is used for charging an external electric automobile, the current discharging speed of a charging pile battery is obtained in real time, and the current charging speed of an automobile battery of the electric automobile is obtained in real time;
judging whether a charging abnormal condition exists at present according to the current discharging speed of a charging pile battery, the current charging speed of an automobile battery and a preset first fitting relation between the discharging speed of the charging pile battery corresponding to the automobile model of the electric automobile and the charging speed of the automobile battery;
and when the abnormal condition exists, sending preset reminding information to a user side corresponding to the electric automobile, wherein the preset reminding information is used for reminding that the abnormal charging condition exists at present.
In the technical scheme, the first fitting relation can be obtained through a fitting algorithm according to a historical charging log of the automobile battery corresponding to the automobile model of the electric automobile in advance, and can reflect the numerical relation of the six parameters in the charging process. According to the technical scheme, whether the charging abnormal condition exists at present can be accurately judged, if yes, the user side corresponding to the electric automobile is reminded, a user can pay attention to the condition in time, and the situation that the user does not know the condition for a long time and the charging time is wasted is avoided.
In one embodiment, the determining whether there is an abnormal charging condition according to the current discharging speed of the charging pile battery, the current charging speed of the automobile battery, and a preset first fitting relationship between the discharging speed of the charging pile battery corresponding to the automobile model of the electric automobile and the charging speed of the automobile battery includes:
judging whether two parameters, namely the current discharging speed of the charging pile battery and the current charging speed of the automobile battery, are matched with a first fitting relation between the discharging speed of the charging pile battery corresponding to the preset automobile model of the electric automobile and the charging speed of the automobile battery;
if the charging conditions are matched, determining that no abnormal charging condition exists currently;
and if not, determining that the charging abnormal condition exists currently.
In one embodiment, the determining whether an abnormal charging condition exists currently according to the current discharging speed of the charging pile battery, the current charging speed of the automobile battery, and a preset first fitting relationship between the discharging speed of the charging pile battery corresponding to the automobile model of the electric automobile and the charging speed of the automobile battery includes:
acquiring the current discharging speed, the current residual electric quantity and the current temperature of the charging pile battery;
acquiring the current charging speed, the current residual capacity and the current temperature of an automobile battery of the electric automobile;
acquiring a preset second fitting relation among the discharging speed, the residual electric quantity and the charging pile battery temperature of the charging pile battery corresponding to the automobile model of the electric automobile, the charging speed, the residual electric quantity and the automobile battery temperature of the automobile battery;
judging whether the current discharging speed, the current residual capacity and the current temperature of the charging pile battery and the relation among the six parameters of the current charging speed, the current residual capacity and the current temperature of the automobile battery of the electric automobile accord with the second fitting relation or not;
if not, judging that the charging abnormal condition exists currently.
In the technical scheme, the second fitting relation can be obtained through a fitting algorithm according to the discharging speed, the residual capacity and the charging pile battery temperature of the charging pile battery corresponding to the automobile model of the electric automobile, and the historical charging log of the automobile battery with the charging speed, the residual capacity and the automobile battery temperature of the automobile battery, and can reflect the numerical relation of the six parameters in the charging process.
According to the technical scheme, whether the charging abnormal condition exists at present can be accurately judged, if yes, the user side corresponding to the electric automobile is reminded, a user can pay attention to the condition in time, and the situation that the user does not know the condition for a long time and the charging time is wasted is avoided.
In one embodiment, the method may further include: in the process of charging the electric automobile by the charging gun, acquiring a first preset parameter of a battery in the charging pile and a second preset parameter of the electric automobile, wherein the first preset parameter comprises any one or more of battery vibration intensity, battery moving speed, battery temperature and external pressure born by the battery; the second preset parameter comprises any one or more of the vibration intensity of the automobile battery, the moving speed of the automobile, the temperature of the automobile battery and the external pressure born by the automobile battery;
judging whether to control to stop the power supply of the battery in the charging pile to the charging gun or not according to a first preset parameter of the battery in the charging pile and a second preset parameter of the electric automobile;
and when the judgment result is yes, controlling to stop the battery in the charging pile to supply power to the charging gun, and sending a charging interruption prompt to a preset terminal device, wherein the terminal device comprises a management terminal used by a charging pile manager and/or a driver terminal used by a driver of the electric automobile.
In one embodiment, according to a first preset parameter of a battery in a charging pile and a second preset parameter of an electric vehicle, determining whether to control to stop the battery in the charging pile to supply power to a charging gun comprises:
determining charging safety factor alpha of charging pile at t moment by using the following formulas (1) and (2)tAnd automobile charging safety factor betat：
Wherein, delta1To represent
The weight coefficient corresponding to the calculation item is a preset value, and the value range is (0, 1); delta2To represent
The weight coefficient corresponding to the calculation term is a preset value and has a value range of(0, 1); and delta1+δ2＝1；RtiThe value of the ith first preset parameter of the charging pile battery at the time t is represented; ri0The preset maximum value of the ith first preset parameter representing the charging pile battery; epsiloniThe weighting coefficient corresponding to the ith first preset parameter of the charging pile battery is represented, and the value range is [0,1 ]]And is and
Ytjthe value of the jth second preset parameter of the automobile battery at the time t is represented; y isj0The preset maximum value of the jth second preset parameter of the automobile battery is represented; lambda [ alpha ]jThe weight coefficient corresponding to the jth second preset parameter of the automobile battery is represented, and the value range is [0,1 ]]And is and
u represents the total number of the first preset parameters; j represents the total number of the second preset parameters;
judgment of alphatThe magnitude relation between the first preset threshold values and the corresponding first preset threshold values, and the judgment betatThe magnitude relation between the first preset threshold and the corresponding second preset threshold;
when alpha istEqual to or greater than a first preset threshold value (which indicates that the charging pile has potential safety hazard threatening the charging safety) and/or betatAnd when the voltage is equal to or greater than a second preset threshold value (which indicates that the potential safety hazard threatening the charging safety exists in the electric automobile), determining to control to stop the battery in the charging pile to supply power to the charging gun. Above-mentioned technical scheme utilizes formula (1), (2), according to probably influencing the comprehensive reference parameter that fills electric pile and give electric automobile charging security, judges whether there is the potential safety hazard that threatens charging security at the moment t, if exist, then control stops to fill electric pile in the battery to the rifle power supply that charges, above-mentioned technical scheme passes through the security of intelligent means intelligent control charging process, has improved the security that charges for electric automobile with filling electric pile, prevents to take place the charging accident. Moreover, because the formulas (1) and (2) are calculated by integrating a plurality of parameters, the safety control is further improvedThe charging process is safer due to comprehensive integration.
In one embodiment, after the step S2 performs the reminding operation, the method may further include steps a1-a 4:
a1, marking the moment when the charging pile battery is charged for the last time as 0 moment, and monitoring the charging and discharging current value of the charging pile battery from 0 moment to t moment;
step a2, determining a theoretical remaining capacity reference value of the battery according to the following formula (3):
wherein Q istDividing the time from 0 moment to t moment into h time periods according to a preset time interval, and determining the average value of the charging pile battery current in each time period, wherein the charging pile battery current is a positive number when the charging pile battery discharges, and the charging pile battery current is a negative number when the charging pile battery charges; i is0-hThe sum of the average values of the current of the charging pile batteries in the h time periods, UdThe power-off voltage of the charging pile battery is represented by R1, the ohmic internal resistance of the battery in the charging pile is represented by R2, and the polarization internal resistance of the battery in the charging pile is represented by R2;
step A3, determining and acquiring the environmental electric quantity of the charging pile battery according to the following formula (3):
wherein, WtThe environmental electric quantity of the charging pile battery at the moment t is obtained; sgn () is a sign function when
Is greater than 0A value of 1 when
Is 0 when the value of (b) is equal to 0, and is equal to 0 when the value of (b) is less than
The function value is-1 when the value of (d) is less than 0,
λ is a historical average discharge voltage of the charging pile battery, Sc represents a total historical charging frequency of the charging pile battery up to the time T, Smax is a preset maximum chargeable frequency of the charging pile battery, and T1 is a temperature of an environment where the charging pile is located currently; min (25, T1) represents taking the minimum of the two values 25 and T1;
and A4, judging whether the value of the environment electric quantity is smaller than a preset environment electric quantity threshold value, if so, executing a reminding operation, wherein the reminding operation is used for reminding a manager of the charging pile, and the charging and discharging times of the battery of the charging pile should be controlled so as to prolong the service life of the battery.
According to the technical scheme, whether the charging and discharging times of the charging pile battery are too frequent can be judged through the algorithm, and a prompt is sent timely; the algorithm also considers the internal environmental parameters and environmental factors of the battery, so that the judgment result is more accurate and accords with the environment where the charging pile battery is located, and the reminding is timely sent out when the charging and discharging times of the battery are more and the service life of the battery is influenced, thereby improving the management efficiency and the intellectualization of the battery.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A battery monitoring method of a charging pile capable of quickly changing an energy storage power supply is characterized by comprising the following steps:
acquiring the residual electric quantity of a battery in a charging pile, wherein the battery is connected with a charging gun and is used as a power source for charging the electric automobile by the charging gun;
and when the residual electric quantity is equal to or less than a preset electric quantity threshold value, executing a reminding operation, wherein the reminding operation is used for reminding that the electric quantity of the battery is insufficient.
2. The method of claim 1, wherein after the performing the reminder operation, the method further comprises:
when the charging gun is used for charging an external electric automobile, the current discharging speed of a battery of the charging pile is obtained in real time, and the current charging speed of an automobile battery of the electric automobile is obtained in real time;
judging whether a charging abnormal condition exists at present according to the current discharging speed of the charging pile battery, the current charging speed of the automobile battery and a preset first fitting relation between the discharging speed of the charging pile battery corresponding to the automobile model of the electric automobile and the charging speed of the automobile battery;
and when the abnormal condition exists, sending preset reminding information to a user side corresponding to the electric automobile, wherein the preset reminding information is used for reminding that the abnormal charging condition exists at present.
3. The method of claim 2,
according to fill electric pile battery's current discharge velocity, car battery's current charge velocity and predetermine fill electric pile battery discharge velocity and the first fit relation between the car battery charge velocity that car model corresponds, judge whether the current abnormal conditions that charges exist, include:
judging whether two parameters, namely the current discharging speed of the charging pile battery and the current charging speed of the automobile battery, are matched with a first fitting relation between the discharging speed of the charging pile battery corresponding to the preset automobile model of the electric automobile and the charging speed of the automobile battery;
if the charging conditions are matched, determining that no abnormal charging condition exists currently;
and if not, determining that the charging abnormal condition exists currently.
4. The method of claim 2,
according to fill electric pile battery's current discharge velocity, car battery's current charge velocity and predetermine fill electric pile battery discharge velocity and the first fit relation between the car battery charge velocity that car model corresponds, judge whether the current abnormal conditions that charges exist, include:
acquiring the current discharging speed, the current residual electric quantity and the current temperature of the charging pile battery;
acquiring the current charging speed, the current residual capacity and the current temperature of an automobile battery of the electric automobile;
acquiring a preset second fitting relation among the discharging speed, the residual electric quantity and the charging pile battery temperature of the charging pile battery corresponding to the automobile model of the electric automobile, the charging speed, the residual electric quantity and the automobile battery temperature of the automobile battery;
judging whether the current discharging speed, the current residual capacity and the current temperature of the charging pile battery and the relation among the six parameters of the current charging speed, the current residual capacity and the current temperature of the automobile battery of the electric automobile accord with the second fitting relation or not;
if not, judging that the charging abnormal condition exists currently.
5. The method of claim 1, wherein after the performing the reminder operation, the method further comprises:
in the process that the charging gun charges the electric automobile, acquiring a first preset parameter of a battery in the charging pile and a second preset parameter of the electric automobile, wherein the first preset parameter comprises any one or more of battery vibration strength, battery moving speed, battery temperature and external pressure born by the battery; the second preset parameter comprises any one or more of the vibration intensity of the automobile battery, the moving speed of the automobile, the temperature of the automobile battery and the external pressure born by the automobile battery;
judging whether to control to stop the power supply of the battery in the charging pile to the charging gun or not according to a first preset parameter of the battery in the charging pile and a second preset parameter of the electric vehicle;
and when the judgment result is yes, controlling to stop the power supply of the battery in the charging pile to the charging gun, and sending a charging interruption prompt to a preset terminal device, wherein the terminal device comprises a management terminal used by a charging pile manager and/or a driver terminal used by a driver of the electric automobile.
6. The method of claim 5,
according to fill first preset parameter of electric pile battery and electric automobile's second preset parameter, judge whether control stops fill electric pile battery to the rifle power supply that charges includes:
determining charging safety factor alpha of charging pile at t moment by using the following formulas (1) and (2)tAnd automobile charging safety factor betat：
Wherein, delta1To represent
The weight coefficient corresponding to the calculation item is a preset value, and the value range is (0, 1); delta2To represent
The weight coefficient corresponding to the calculation item is a preset value, and the value range is (0, 1); and delta1+δ2＝1；RtiThe value of the ith first preset parameter of the charging pile battery at the time t is represented; ri0The preset maximum value of the ith first preset parameter representing the charging pile battery; epsiloniThe weighting coefficient corresponding to the ith first preset parameter of the charging pile battery is represented, and the value range is [0,1 ]]And is and
Ytjthe value of the jth second preset parameter of the automobile battery at the time t is represented; y isj0The preset maximum value of the jth second preset parameter of the automobile battery is represented; lambda [ alpha ]jThe weight coefficient corresponding to the jth second preset parameter of the automobile battery is represented, and the value range is [0,1 ]]And is and
u represents the total number of the first preset parameters; j represents the total number of the second preset parameters;
judgment of alphatThe magnitude relation between the first preset threshold values and the corresponding first preset threshold values, and the judgment betatThe magnitude relation between the first preset threshold and the corresponding second preset threshold;
when alpha istEqual to or greater than a first preset threshold value and/or betatAnd when the voltage is equal to or larger than a second preset threshold value, the battery in the charging pile is determined to be controlled to stop supplying power to the charging gun.
7. The method of claim 1,
after the executing of the reminding operation, the method further comprises:
a1, marking the moment when the charging pile battery is charged for the last time as 0 moment, and monitoring the charging and discharging current value of the charging pile battery from 0 moment to t moment;
step a2, determining a theoretical remaining capacity reference value of the battery according to the following formula (3):
wherein Q istDividing the time from 0 moment to t moment into h time periods according to a preset time interval, and determining the average value of the charging pile battery current in each time period, wherein the charging pile battery current is a positive number when the charging pile battery discharges, and the charging pile battery current is a negative number when the charging pile battery charges; i is0-hThe sum of the average values of the current of the charging pile batteries in the h time periods, UdThe power-off voltage of the charging pile battery is represented by R1, the ohmic internal resistance of the battery in the charging pile is represented by R2, and the polarization internal resistance of the battery in the charging pile is represented by R2;
step A3, determining and acquiring the environmental electric quantity of the charging pile battery according to the following formula (3):
wherein, WtThe environmental electric quantity of the charging pile battery at the moment t is obtained; sgn () is a sign function when
When the value of (b) is greater than 0, the function value is 1, when
Is 0 when the value of (b) is equal to 0, and is equal to 0 when the value of (b) is less than
The function value is-1 when the value of (d) is less than 0,
λ is a historical average discharge voltage of the charging pile battery, Sc represents a total historical charging frequency of the charging pile battery up to the time T, Smax is a preset maximum chargeable frequency of the charging pile battery, and T1 is a temperature of an environment where the charging pile is located currently; min (25, T1) represents taking the minimum of the two values 25 and T1;
and A4, judging whether the value of the environment electric quantity is smaller than a preset environment electric quantity threshold value, if so, executing a reminding operation, wherein the reminding operation is used for reminding a manager of the charging pile, and the charging and discharging times of the battery of the charging pile should be controlled so as to prolong the service life of the battery.
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