CN108248405B - Electric vehicle charging control method and system - Google Patents
Electric vehicle charging control method and system Download PDFInfo
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- CN108248405B CN108248405B CN201611238053.2A CN201611238053A CN108248405B CN 108248405 B CN108248405 B CN 108248405B CN 201611238053 A CN201611238053 A CN 201611238053A CN 108248405 B CN108248405 B CN 108248405B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000000087 stabilizing effect Effects 0.000 claims description 24
- 238000012790 confirmation Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 1
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Classifications
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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
- B60L53/63—Monitoring or controlling charging stations in response to network capacity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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- H02J7/0027—
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
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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
-
- 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
Abstract
The invention discloses a charging control method and a charging control system for an electric vehicle, wherein the method comprises the following steps: collecting the required charging voltage and the required charging current of each electric vehicle connected with a charger, and obtaining the required charging power through the required charging voltage and the required charging current; judging whether the total amount of the required charging power of all the electric vehicles is greater than the total charging energy amount of the charger; if so, controlling the full-power load operation of the charger; if not, controlling the charger to operate according to the total amount of the required charging power; setting a stable output voltage for each electric vehicle according to the proportion of the required charging voltage of each electric vehicle; and adjusting the current for charging each electric vehicle according to the proportion of the required charging voltage of the electric vehicle, and charging each electric vehicle. The invention relieves the problem of unmatched quantity of the charger and the electric vehicles, and can greatly improve the power utilization efficiency of the charger.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a charging control method of an electric vehicle. The invention further relates to an electric vehicle charging control system for implementing the method.
Background
Along with the popularization of new energy automobiles, the problem of difficult charging becomes more and more prominent.
The charging difficulty is mainly reflected in two aspects, one is that the number of chargers is not proportional to the number of vehicles needing to be charged, and the number of chargers is seriously lacking. Another problem is the mismatch between the charging power of the charger and the charging demand power of the vehicle battery. If the charger is designed to have larger power, the charging requirement of the commercial vehicle with high power can be met, but the situation of power excess can occur when the vehicle is charged. This situation results in a low charger power utilization.
In summary, how to provide a method for charging an electric car more conveniently is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a charging control method for an electric vehicle, which can realize simultaneous charging of a plurality of vehicles.
Another object of the present invention is to provide an electric vehicle charging control system for implementing the above method.
In order to achieve the above purpose, the invention provides the following technical scheme:
an electric vehicle charging control method comprising:
collecting the required charging voltage and the required charging current of each electric vehicle connected with a charger, and obtaining the required charging power through the required charging voltage and the required charging current;
judging whether the total amount of the required charging power of all the electric vehicles is greater than the total charging energy amount of the charger; if so, controlling the full-power load operation of the charger; if not, controlling the charger to operate according to the total amount of the required charging power;
setting a stable output voltage for each of the electric vehicles according to a proportion of the required charging voltage of each of the electric vehicles;
and adjusting the current for charging each electric vehicle according to the proportion of the required charging voltage of the electric vehicle, and charging each electric vehicle.
Preferably, the stable output voltage set to each of the electric vehicles includes:
adjusting and setting a stable output voltage according to the charging demand voltage to obtain a compensation voltage, and adjusting the stable output voltage when the stable output voltage does not meet the transmission requirement, wherein the adjustment amount is the compensation voltage; the compensation voltage is the voltage which needs to be increased after voltage loss caused by voltage distribution in the energy distribution process.
Preferably, before collecting the required charging voltage and the required charging current of each electric vehicle connected to the charger, the method further includes:
and sending a connection confirmation signal to each electric vehicle, and receiving a feedback confirmation signal sent by the electric vehicle.
Preferably, the method further comprises the following steps:
and detecting a demand change signal of the electric vehicle in real time, and returning to the step of collecting the demand charging voltage and the demand charging current of each electric vehicle connected with the charger after detecting the demand change signal.
Preferably, before obtaining the required charging power by the required charging voltage and the required charging current, the method further includes:
and judging whether the required charging voltage and the required charging current of all the electric vehicles connected with the charger are collected.
An electric vehicle charging control system comprising:
the energy stabilizing devices are used for obtaining required charging power according to the collected required charging voltage and required charging current of the electric vehicle, and at least two energy stabilizing devices are connected with the electric vehicle in a one-to-one correspondence mode;
the energy distribution device is used for acquiring the total amount of the required charging power of each energy stabilizing device, and when the total required charging power is greater than the total charging energy amount of the charger, the energy distribution device controls the full-power load operation of the charger; when the total required charging power is less than or equal to the total charging energy of the charger, the energy distribution device controls the charger to operate according to the total required charging power;
the energy distribution device is also used for setting stable output voltage and current to the electric vehicles according to the proportion of the required charging voltage of each electric vehicle, and charging each electric vehicle.
Preferably, the energy distribution device further includes a secondary voltage boost unit, where the secondary voltage boost unit is configured to obtain a compensation voltage, and adjust the stable output voltage when the stable output voltage does not meet the transmission requirement, where the adjustment amount is the compensation voltage; the compensation voltage is the voltage which needs to be increased after voltage loss caused by voltage distribution in the energy distribution process.
Preferably, the energy stabilizing device is further provided with a confirmation connection unit, the confirmation connection unit is used for confirming that all the required charging voltages and required charging currents of the electric vehicle connected with the charger are collected, if the collection is completed, the energy stabilizing device is controlled to calculate the required charging power, and if the collection is not completed, the energy stabilizing device is controlled to continue to collect.
Preferably, the energy distribution device and the energy stabilizing device are connected in a one-to-many arrangement or in a many-to-many arrangement.
The electric vehicle charging control method provided by the invention can be used for simultaneously charging a plurality of electric vehicles by using one charger, so that the problem that the number of the chargers is not matched with that of the electric vehicles is solved. Meanwhile, the power utilization efficiency of the charger can be greatly improved. The invention also provides an electric vehicle charging control system which can be used for realizing the method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a charging control method for an electric vehicle according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a charging control method for an electric vehicle, which can realize simultaneous charging of a plurality of vehicles. Another core of the present invention is to provide an electric vehicle charging control system for implementing the above method.
Referring to fig. 1, fig. 1 is a flowchart illustrating a charging control method for an electric vehicle according to the present invention.
The invention provides a charging control method of an electric vehicle, which is mainly used for one-to-many operation of a charger on the electric vehicle, and specifically comprises the following steps:
step S1: and collecting the required charging voltage and the required charging current of each electric vehicle connected with the charger, and obtaining the required charging power through the required charging voltage and the required charging current.
Step S2: judging whether the total amount of the required charging power of all the electric vehicles is greater than the total charging energy amount of the charger; if so, controlling the full-power load operation of the charger; if not, controlling the charger to operate according to the total amount of the required charging power.
Step S3: and setting the stable output voltage for each electric vehicle according to the proportion of the required charging voltage of each electric vehicle.
Step S4: and adjusting the current for charging each electric vehicle according to the proportion of the required charging voltage of the electric vehicle, and charging each electric vehicle.
It should be noted that the charging machine and the electric vehicle are connected in a one-to-many or many-to-many manner, an electric vehicle charging control system is connected between the charging machine and the electric vehicle, and the charging mode of the charging machine is controlled by the electric vehicle charging control system.
The required charging voltage and the required charging current obtained in step S1 are the actual required state of the electric vehicle, and the required charging power can be obtained from the required charging voltage and the required charging current.
Step S2, judging the relationship between the sum of the required charging power of all electric vehicles and the total charging amount of the charger, and controlling the full-power load operation of the charger if the sum of the required charging power is greater than the total charging amount of the charger; and if the sum of the required charging power is less than or equal to the total charging energy amount of the charger, controlling the charger to operate according to the total charging power amount. That is to say, the sum of the required charging power and the total charging energy of the charger is reduced, and the lower power is selected as the working power of the charger, so that on one hand, the charging requirements of each electric vehicle can be basically met, and on the other hand, the working influence on the charger can be avoided.
In steps S3 and S4, the total power is divided according to the ratio of the required voltages of the electric vehicles, and the total power is divided into a plurality of shares corresponding to the number of the electric vehicles according to the ratio control for outputting to the electric vehicles.
The electric vehicle charging control method provided by the invention can be used for simultaneously charging a plurality of electric vehicles by using one charger, so that the problem that the number of the chargers is not matched with that of the electric vehicles is solved. Meanwhile, the power utilization efficiency of the charger can be greatly improved.
On the basis of the above embodiment, step S3: the step of setting the stable output voltage to each electric vehicle may specifically include:
step S31: adjusting and setting a stable output voltage according to the charging demand voltage to obtain a compensation voltage, and adjusting the stable output voltage when the stable output voltage does not meet the transmission requirement, wherein the adjustment amount is the compensation voltage; the compensation voltage is the voltage which needs to be increased after voltage loss caused by voltage distribution in the energy distribution process.
It should be noted that the types of the electric vehicles may be various, so that the corresponding compensation voltages may be multiple and have a large difference, and therefore, the stable output voltage needs to be adjusted according to the compensation voltage of the currently connected electric vehicle to meet the requirement of the corresponding electric vehicle, so as to facilitate the reception of the electric vehicle and avoid the damage to the electric devices of the electric vehicle.
On the basis of any of the above embodiments, step S1: before the step of collecting the required charging voltage and the required charging current of each electric vehicle connected with the charger, the method further comprises the following steps:
step S11: and sending a connection confirmation signal to each electric vehicle, and receiving a feedback confirmation signal sent by the electric vehicle.
It should be noted that the required charging voltage and the required charging current of the electric vehicle are accurately obtained by confirming the number of vehicles that need to be charged.
On the basis of any one of the above embodiments, the method further includes:
step S5: and detecting a demand change signal of the electric vehicle in real time, and returning to the step of collecting the demand charging voltage and the demand charging current of each electric vehicle connected with the charger after the demand change signal is detected.
It should be noted that the present embodiment does not limit the implementation sequence of steps S5 and S1 to S4, and step S1 may be performed at any position of S1 to S4. Correspondingly, in the electric vehicle charging control system, a signal for detecting the change of the electric vehicle requirement needs to be set.
On the basis of any of the above embodiments, before obtaining the required charging power from the required charging voltage and the required charging current in step S1, the method further includes the following steps:
step S12: and judging whether the required charging voltage and the required charging current of all the electric vehicles connected with the charger are collected.
It should be noted that the step of determining whether to collect the complete information provided by this embodiment may be helpful to confirm and adjust the temporary change of the demand of the electric vehicle, so that the electric energy distribution of the charger is more accurate and reasonable.
In addition to the electric vehicle charging control method provided by each of the above embodiments, the present invention also provides an electric vehicle charging control system for implementing the above method, which may specifically include an energy stabilizing device and an energy distributing device.
Specifically, the energy stabilizing devices are used for collecting the collected required charging voltage and required charging current of the electric vehicle, and obtaining the required charging power according to the collected required charging voltage and required charging current of the electric vehicle, and in order to realize the charging of a plurality of electric vehicles by one charger, at least two energy stabilizing devices are connected with the electric vehicle in a one-to-one correspondence manner; at least two energy stabilizing devices are each connected to an energy distribution device.
The energy distribution device is used for acquiring the total amount of the required charging power of each energy stabilizing device, and when the total required charging power is greater than the total charging energy amount of the charger, the energy distribution device controls the full-power load operation of the charger; when the total required charging power is less than or equal to the total charging energy amount of the charger, the energy distribution device controls the charger to operate according to the total required charging power amount; the energy distribution device is also used for setting stable output voltage and current to the electric vehicles according to the proportion of the required charging voltage of each electric vehicle and charging each electric vehicle.
It should be noted that the energy stabilizing device and the energy distributing device are connected in a many-to-one or many-to-many relationship. The specific control manner of the electric vehicle charging control system provided by the embodiment can refer to the embodiment of the method.
On the basis of the above embodiment, the energy distribution apparatus further includes a secondary boosting unit, the secondary boosting unit is configured to obtain the compensation voltage, and adjust the stable output voltage when the stable output voltage does not meet the transmission requirement, the adjustment amount being the compensation voltage; the compensation voltage is the voltage which needs to be increased after the voltage loss caused by voltage distribution in the energy distribution process.
On the basis of any one of the above embodiments, the energy stabilizing device is further provided with a confirmation connection unit, the confirmation connection unit is used for confirming that the required charging voltage and the required charging current of all the electric vehicles connected with the charger are collected, if the collection is completed, the energy stabilizing device is controlled to calculate the required charging power, and if the collection is not completed, the energy stabilizing device is controlled to continue to collect.
On the basis of any of the above embodiments, the energy distribution device and the energy stabilizing device are connected in a one-to-many arrangement, or in a many-to-many arrangement.
In addition to the main structure of the electric vehicle charging control system provided in the above embodiments, please refer to the prior art for the structure of other parts of the electric vehicle charging control system, which is not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The charging control method and the charging control system for the electric vehicle provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. An electric vehicle charging control method, characterized by comprising:
collecting the required charging voltage and the required charging current of each electric vehicle connected with a charger, and obtaining the required charging power through the required charging voltage and the required charging current;
judging whether the total amount of the required charging power of all the electric vehicles is greater than the total charging energy amount of the charger; if so, controlling the full-power load operation of the charger; if not, controlling the charger to operate according to the total amount of the required charging power;
setting a stable output voltage for each of the electric vehicles according to a proportion of the required charging voltage of each of the electric vehicles;
adjusting the current for charging each electric vehicle according to the proportion of the required charging voltage of the electric vehicle, and charging each electric vehicle;
further comprising:
and detecting a demand change signal of the electric vehicle in real time, and returning to the step of collecting the demand charging voltage and the demand charging current of each electric vehicle connected with the charger after detecting the demand change signal.
2. The electric vehicle charge control method according to claim 1, wherein the setting of the stable output voltage to each of the electric vehicles includes:
adjusting and setting a stable output voltage according to the required charging voltage to obtain a compensation voltage, and adjusting the stable output voltage when the stable output voltage does not meet the transmission requirement, wherein the adjustment amount is the compensation voltage; the compensation voltage is the voltage which needs to be increased after voltage loss caused by voltage distribution in the energy distribution process.
3. The method for controlling charging of an electric vehicle according to claim 1, wherein before collecting the required charging voltage and the required charging current of each electric vehicle connected to the charger, the method further comprises:
and sending a connection confirmation signal to each electric vehicle, and receiving a feedback confirmation signal sent by the electric vehicle.
4. The method of claim 1, wherein before obtaining the required charging power from the required charging voltage and the required charging current, the method further comprises:
and judging whether the required charging voltage and the required charging current of all the electric vehicles connected with the charger are collected.
5. An electric vehicle charging control system, comprising:
the energy stabilizing devices are used for obtaining required charging power according to the collected required charging voltage and required charging current of the electric vehicle, and at least two energy stabilizing devices are connected with the electric vehicle in a one-to-one correspondence mode;
the energy distribution device is used for acquiring the total amount of the required charging power of each energy stabilizing device, and when the total required charging power is greater than the total charging energy amount of the charger, the energy distribution device controls the full-power load operation of the charger; when the total required charging power is less than or equal to the total charging energy of the charger, the energy distribution device controls the charger to operate according to the total required charging power; the energy distribution device is also used for setting stable output voltage and current to the electric vehicles according to the proportion of the required charging voltage of each electric vehicle and charging each electric vehicle; at least two energy stabilizing devices are connected with the energy distribution device;
further comprising: and detecting a demand change signal of the electric vehicle in real time, and returning to collect the demand charging voltage and the demand charging current of each electric vehicle connected with the charger after detecting the demand change signal.
6. The charging control system for the electric vehicle according to claim 5, wherein the energy distribution device further comprises a secondary boosting unit, and the secondary boosting unit is configured to obtain a compensation voltage and adjust the stable output voltage by the compensation voltage when the stable output voltage does not meet a transmission requirement; the compensation voltage is the voltage which needs to be increased after voltage loss caused by voltage distribution in the energy distribution process.
7. The charging control system for the electric vehicle as claimed in claim 5 or 6, wherein the energy stabilizing device is further provided with a confirmation connection unit, the confirmation connection unit is used for confirming that the required charging voltage and the required charging current of all the electric vehicles connected with the charger are collected, if the collection is completed, the energy stabilizing device is controlled to calculate the required charging power, and if the collection is not completed, the energy stabilizing device is controlled to continue to collect.
8. The electric vehicle charging control system of claim 7, wherein the energy distribution device and the energy stabilization device are connected in a one-to-many arrangement or in a many-to-many arrangement.
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| CN110797928A (en) * | 2018-08-02 | 2020-02-14 | 郑州宇通客车股份有限公司 | Charging station load balance management method and device |
| CN109094401B (en) * | 2018-08-25 | 2021-06-25 | 深圳市健思研科技有限公司 | Energy vehicle charging control method, storage medium, control device and charging pile |
| CN110920457A (en) * | 2019-12-24 | 2020-03-27 | 重庆国翰能源发展有限公司 | Charging module distribution method for four-pile charging pile |
| CN111907365B (en) * | 2020-08-25 | 2022-06-07 | 深圳市科华恒盛科技有限公司 | Charging control method and device for electric vehicle charging pile and terminal equipment |
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