CN115102260A - Bidirectional low-voltage DC-AC inverter - Google Patents
Bidirectional low-voltage DC-AC inverter Download PDFInfo
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- CN115102260A CN115102260A CN202210880725.9A CN202210880725A CN115102260A CN 115102260 A CN115102260 A CN 115102260A CN 202210880725 A CN202210880725 A CN 202210880725A CN 115102260 A CN115102260 A CN 115102260A
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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
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
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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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- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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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
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a bidirectional low-voltage DC-to-AC inverter, comprising: the system comprises a first connecting module, a second connecting module, an inversion module and a control module, wherein the first connecting module is electrically connected with a power battery of the electric automobile; the first connecting module, the inversion module and the second connecting module are sequentially connected; further comprising: the wireless communication module is electrically connected with the control module; the control module performs the following operations: the wireless communication module is connected to a vehicle-mounted computer of the electric automobile; acquiring state information of a power battery sent by a vehicle-mounted computer; determining a first required electric quantity required by the return trip; and controlling the electric energy output of the second connecting module based on the state information and the first required electric quantity. The bidirectional low-voltage DC-AC inverter provided by the invention considers the return demand of a user when the power battery of the electric automobile is accessed to provide outdoor use electric energy demand for the user, and avoids the situation that the electric energy of the power battery is excessively used and the return cannot be carried out.
Description
Technical Field
The invention relates to the technical field of inverters, in particular to a bidirectional low-voltage direct current-to-alternating current inverter.
Background
With the push of clean energy in recent years, the concept of new energy automobiles appears; the new energy automobile adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, and forms an automobile with advanced technical principle, new technology and new structure.
The pure electric vehicle is a new energy vehicle taking a power battery as an energy source; the electric car has the advantages of no pollution, low noise and the like, is popular with consumers, can provide alternating current for users by utilizing a power battery of the electric car through inversion when going out for camping, and meets the use requirements of electric appliances when the users camp; however, the existing inverter only provides an alternating current inversion function, the return demand of a user cannot be considered, and the situation that the return demand of the user cannot be met after the electric energy of the power battery is used excessively can occur.
Disclosure of Invention
One objective of the present invention is to provide a bidirectional low-voltage dc-ac inverter, which takes the return demand of a user into consideration when a power battery of an electric vehicle is connected to provide outdoor electric energy demand for the user, so as to avoid the situation that the return cannot be performed when the power battery is used excessively.
The embodiment of the invention provides a bidirectional low-voltage DC-AC inverter, which comprises: the system comprises a first connecting module, a second connecting module, an inversion module and a control module, wherein the first connecting module is electrically connected with a power battery of the electric automobile; the first connecting module, the inversion module and the second connecting module are sequentially connected; the second connection module provides a connection interface for connecting a user with other alternating current electric appliances; the control module is respectively in control connection with the first connection module, the second connection module and the inversion module; further comprising: the wireless communication module is electrically connected with the control module;
the control module performs the following operations:
the wireless communication module is connected to a vehicle-mounted computer of the electric automobile;
acquiring state information of a power battery sent by a vehicle-mounted computer;
determining a first required electric quantity required by a return trip;
and controlling the electric energy output of the second connecting module based on the state information and the first required electric quantity.
Preferably, the bidirectional low voltage dc-to-ac inverter further comprises:
the DC-DC voltage transformation module is connected with the first connection module;
and the third connecting module is connected with the DC-DC voltage transformation module and provides a connecting interface for connecting other direct-current electric appliances to a user.
Preferably, the control module further performs the following operations:
acquiring a use mode selected by a user;
when the use mode is an electric automobile-electric automobile charging mode;
acquiring a first model of an electric automobile used as electric energy output and a second model of the electric automobile needing to input electric energy;
configuring a DC-DC voltage transformation module based on the first model and the second model;
and/or the presence of a gas in the gas,
acquiring the residual electric quantity of the electric automobile as electric energy output;
acquiring the return electric quantity of the electric automobile as electric energy output;
controlling power transmission based on the remaining power and the return power of the electric vehicle as power output;
and/or the presence of a gas in the gas,
acquiring the residual electric quantity of the electric automobile needing electric energy input;
acquiring the return electric quantity of the electric automobile needing electric energy input;
and controlling the electric energy transmission based on the residual electric quantity and the return electric quantity of the electric automobile needing the electric energy input.
Preferably, the control module determines a first required electric quantity required by the return trip, and comprises:
determining current first positioning information through a vehicle-mounted positioning module;
acquiring second positioning information of a preset first target place;
determining a return path based on the first positioning information and the second positioning information;
and determining a first required electric quantity required by the return stroke based on the return stroke path.
Preferably, the determining the first required electric quantity required by the return trip based on the return trip path includes:
extracting the characteristics of the return path to obtain a plurality of characteristic values;
constructing a feature set based on the plurality of feature values;
acquiring a preset electric quantity determination library;
matching the feature set with a determination set associated with each electric quantity value in an electric quantity determination library;
acquiring an electric quantity value associated with the determination set matched with the feature set as a first required electric quantity required by the return trip;
wherein the characteristic values include: one or more of the total length of the path, the number of intersections in the path, the number of crosswalks in the path, the speed limit for each road segment, and the length of the path at each speed limit.
Preferably, the controlling the power output of the second connection module based on the state information and the first required power includes:
analyzing the state information and determining the residual electric quantity of the power battery;
determining a first threshold electric quantity based on the first required electric quantity; the first threshold electric quantity is greater than or equal to the first required electric quantity;
when the residual electric quantity is equal to the first threshold electric quantity, outputting preset first prompt information through the display module and controlling the second connecting module to stop electric energy output.
Preferably, the bidirectional low voltage dc-to-ac inverter further comprises: the key is electrically connected with the control module;
the control module further performs the following operations:
after the first prompt message is output through the display module, receiving a power utilization permission instruction of a user through a key;
acquiring the distribution condition of charging points in a preset distance range around a first position corresponding to the first positioning information;
determining at least one charging point as a target point based on the distribution situation of the charging points;
determining a charging path based on the first positioning information and the third positioning information of the target point;
determining a second required electric quantity required by the charging path;
when the second required electric quantity is larger than or equal to the first required electric quantity, rejecting the electricity utilization permission instruction and outputting preset second prompt information;
when the second required electric quantity is smaller than the first required electric quantity, receiving an electric energy permission instruction, and controlling the second connecting module to start electric energy output; determining a second threshold electric quantity based on the second required electric quantity; and when the residual electric quantity is equal to the second required electric quantity, outputting preset third prompt information through the display module and controlling the second connecting module to stop electric energy output.
Preferably, the determining at least one charging point as the target point based on the charging point distribution includes:
determining a first moving path of the electric automobile to move to the third position of each charging point based on the third position corresponding to the charging point and the first position corresponding to the first positioning information;
determining a position relation among a third position where the charging point with the shortest first moving path is located, a first position corresponding to the first positioning information and a second position corresponding to the second positioning information;
and when the third position where the charging point with the shortest first moving path is located is on a second moving path where the electric automobile moves from the first position corresponding to the first positioning information to the second position corresponding to the second positioning information, taking the second position where the charging point with the shortest first moving path is located as the target point.
Preferably, the determining at least one charging point as the target point based on the charging point distribution includes:
determining a first moving path of the electric automobile to move to the first position of each charging point based on the third position corresponding to the charging point and the first position corresponding to the first positioning information;
determining a third moving path of the electric automobile moving to the second position corresponding to the second positioning information after the electric automobile is charged from each charging point based on the third position corresponding to the charging point and the second position corresponding to the second positioning information;
acquiring the use state of a charging pile at each charging point;
constructing a scoring vector based on the first moving path, the third moving path and the use state of the charging pile;
acquiring a preset scoring library;
determining the score value corresponding to each charging point based on the score vectors and the score library;
and taking the charging point with the maximum score value and larger than a preset score threshold value as a target point.
Preferably, determining at least one charging point as a target point based on the charging point distribution further includes:
when the score value of the charging point with the maximum score value is smaller than or equal to the score threshold value, constructing a first direction vector based on a first position corresponding to the first positioning information and a third position corresponding to the charging point; the first direction vector points to a third position for the first position;
constructing a second direction vector based on a second position corresponding to the second positioning information and a first position corresponding to the first positioning information; the second direction vector is that the first position points to the third position;
calculating an included angle between the first direction vector and the second direction vector;
when the included angle is smaller than or equal to a preset included angle threshold value, extracting a charging point as a point to be selected;
taking a charging point which is closest to the first position in the points to be selected as a reference point;
acquiring a fourth moving path from the reference point to other points to be selected;
and taking the candidate point and the reference point corresponding to the shortest fourth moving path as target points.
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 schematic diagram of a bi-directional low voltage DC to AC inverter in accordance with an embodiment of the present invention;
FIG. 2 is a diagram illustrating steps performed by a control module according to an embodiment of the present invention;
fig. 3 is a diagram illustrating a step of determining the first required electric quantity 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.
An embodiment of the present invention provides a bidirectional low voltage dc-ac inverter, as shown in fig. 1, including: the system comprises a first connecting module, a second connecting module, an inversion module and a control module, wherein the first connecting module is electrically connected with a power battery of the electric automobile; the first connecting module, the inversion module and the second connecting module are sequentially connected; the second connection module provides a connection interface for connecting a user with other alternating current electric appliances; the control module is respectively in control connection with the first connection module, the second connection module and the inversion module; further comprising: the wireless communication module is electrically connected with the control module;
as shown in fig. 2, the control module performs the following operations:
step S1: the wireless communication module is connected to a vehicle-mounted computer of the electric automobile;
step S2: acquiring state information of a power battery sent by a vehicle-mounted computer;
step S3: determining a first required electric quantity required by the return trip;
step S4: and controlling the electric energy output of the second connecting module based on the state information and the first required electric quantity.
The working principle and the beneficial effects of the technical scheme are as follows:
when a user drives the electric automobile to go out and go out in a picnic and needs electricity (such as using an induction cooker and an electric grill), the control module controls the circuit among the first connecting module, the inverter module and the second connecting module to be communicated only by connecting the first connecting module to a reserved wiring port on a power battery of the electric automobile through a connecting wire; the user can use the electric appliance only by connecting the electric appliance to the second connecting module; when the electric appliance is used, the control module is also connected to a vehicle-mounted computer of the electric automobile through the wireless communication module; acquiring state information of a power battery sent by a vehicle-mounted computer; determining a first required electric quantity required by the return trip; controlling the electric energy output of the second connection module based on the state information and the first required electric quantity; the electric energy can meet the requirement of return stroke, and the trouble of returning stroke of the user caused by excessive power consumption of the electric appliance is avoided. Wherein, first connection module includes: the first connection port is connected to the power battery through a cable; the second connection module includes: and the at least one power utilization socket is used for connecting a plug of a power utilization appliance. In addition, the power battery also comprises a display for displaying the connection condition of the first connection module and the second connection module and displaying the electric quantity residual condition of the power battery; the first connecting module can also be connected to a charging pile and a solar photovoltaic system of the electric automobile and used for converting direct current provided by the charging pile and the solar photovoltaic system into alternating current for a user to use.
In one embodiment, a bi-directional low voltage dc to ac inverter, further comprising:
the DC-DC voltage transformation module is connected with the first connection module;
and the third connecting module is connected with the DC-DC transformation module and provides a connecting interface for connecting a user with other direct current electric appliances.
The working principle and the beneficial effects of the technical scheme are as follows:
the first connection module, the DC-DC transformation module and the third connection module are connected; the voltage of the direct current of the power battery can be reduced to meet the direct current power demand of users, for example: charging a mobile phone of a user; namely, the third connection module includes: a USB charging interface and the like.
In one embodiment, the control module further performs the following operations:
acquiring a use mode selected by a user;
when the use mode is an electric automobile-electric automobile charging mode;
acquiring a first model of an electric automobile used as electric energy output and a second model of the electric automobile needing to input electric energy;
configuring a DC-DC voltage transformation module based on the first model and the second model;
and/or the presence of a gas in the gas,
acquiring the residual electric quantity of the electric automobile as electric energy output;
acquiring the return electric quantity of the electric automobile as electric energy output;
controlling power transmission based on the remaining power and the return power of the electric vehicle as power output;
and/or the presence of a gas in the atmosphere,
acquiring the residual electric quantity of the electric automobile needing electric energy input;
acquiring the return electric quantity of the electric automobile needing electric energy input;
and controlling the electric energy transmission based on the residual electric quantity and the return electric quantity of the electric automobile needing electric energy input.
The working principle and the beneficial effects of the technical scheme are as follows:
the DC-DC voltage transformation module is configured, so that the electric automobile can be charged, and a user only needs to input a first model of the electric automobile which is used as electric energy output and a second model of the electric automobile which needs to input electric energy; the system automatically completes configuration, and particularly can realize voltage adjustment from an input end to an output end by configuring a DC-DC voltage transformation module so as to adapt to the voltage differential pressure difference of the power batteries of various current vehicle types.
Aiming at the situation that electric vehicles mutually rush, two electric vehicles are required to be ensured to have electric quantity of return stroke respectively, and the return stroke of any one electric vehicle is not influenced; the method comprises the following steps that the residual electric quantity of the electric automobile is obtained through a mode that a wireless communication module is connected with a vehicle-mounted computer; the return charge amount can be realized by means of manual input of a user, such as: the user inputs the distance during the return journey, and the control module determines the required return journey electric quantity according to the distance and the electric quantity comparison table.
Determining a first required electric quantity required for realizing return trip; in one embodiment, as shown in fig. 3, the control module determines the first required electric quantity required for the return trip, including:
step S31: determining current first positioning information through a vehicle-mounted positioning module; the control module is connected with a vehicle-mounted computer through a wireless communication module, and the vehicle-mounted computer sends the positioning of the vehicle-mounted positioning module to the control module;
step S32: acquiring second positioning information of a preset first target place; the first target place is set in advance for a user, for example, a household parking space is set as the first target place;
step S33: determining a return path based on the first positioning information and the second positioning information; navigation can be performed through a path navigation technology, and a path with the shortest time consumption is taken as a return path;
step S34: and determining a first required electric quantity required by the return stroke based on the return stroke path. The first required electric quantity is the electric quantity spent by the electric automobile on the return route. For example: the distance can be compared with the electric quantity through the distance and electric quantity comparison table,
in one embodiment, determining the first required electric quantity required by the return trip based on the return trip path comprises:
extracting the characteristics of the return path to obtain a plurality of characteristic values;
constructing a feature set based on the plurality of feature values;
acquiring a preset electric quantity determination library;
matching the feature set with a determination set associated with each electric quantity value in an electric quantity determination library;
acquiring an electric quantity value associated with the determination set matched with the feature set as a first required electric quantity required by the return trip;
wherein the characteristic values include: one or more of the total length of the path, the number of intersections in the path, the number of crosswalks in the path, the speed limit for each road segment, and the length of the path at each speed limit.
The working principle and the beneficial effects of the technical scheme are as follows:
extracting the characteristics of the return path, comprehensively evaluating and determining the electric quantity value from the conditions of the total length of the path, the number of crossroads in the path, the speed limit of each road section, the path length under each speed limit and the like, and using an electric quantity determining library to divide a large number of paths in advance during evaluationAnalyzing and obtaining, namely, correspondingly associating a determination set with the electric quantity values in an electric quantity determination library one by one; the required electric quantity corresponding to the return path is determined by matching the determination set with the feature set; when the feature set is matched with the determination set, the matching degree of the feature set and the determination set can be calculated by using the following formula:
wherein, in the step (A),
matching degree of the characteristic set and the determined set;
to centralize the feature
A data value;
to determine the first in the concentration
A data value;
for a feature set or to determine the total number of data in a set.
In one embodiment, controlling the power output of the second connection module based on the status information and the first required power includes:
analyzing the state information and determining the residual electric quantity of the power battery; the state information includes: the method comprises the following steps of determining the residual electric quantity from state information of the power battery; when the state information sent by the vehicle-mounted computer comprises the residual electric quantity, directly extracting the residual electric quantity; when not included, the remaining capacity can be estimated by voltage, total capacity of the battery, used capacity of the battery, and the like;
determining a first threshold electric quantity based on the first required electric quantity; the first threshold electric quantity is greater than or equal to the first required electric quantity; for example: the first threshold electric quantity is 10% of the first required electric quantity;
when the residual electric quantity is equal to the first threshold electric quantity, outputting preset first prompt information through the display module and controlling the second connecting module to stop electric energy output. Wherein, the first prompt message includes: the residual electric quantity is XX, the requirement of the backhaul is met, and the backhaul is influenced by the continuous use.
In one embodiment, a bi-directional low voltage dc to ac inverter, further comprising: the key is electrically connected with the control module;
the control module also performs the following operations:
after the first prompt message is output through the display module, receiving a power utilization permission instruction of a user through a key;
acquiring the distribution condition of charging points in a preset distance range (5 KM) around a first position corresponding to the first positioning information; acquiring distribution of charging points around the electric automobile by accessing a charging point management platform;
determining at least one charging point as a target point based on the distribution situation of the charging points; the target point is a charging point which can be charged by a user and can be determined according to the principles of being closest to the target point and the like;
determining a charging path based on the first positioning information and the third positioning information of the target point; the charging path is the shortest path from a first position corresponding to the first positioning information to a third position corresponding to the third positioning information; the shortest path can be the shortest time or the shortest route;
determining a second required electric quantity required by the charging path; the determination can be carried out by an electric quantity determination library;
when the second required electric quantity is larger than or equal to the first required electric quantity, rejecting the electricity utilization permission instruction and outputting a preset second prompt message; for example: the second prompt message includes: there is no charging point nearby where charging can take place;
when the second required electric quantity is smaller than the first required electric quantity, receiving an electric energy permission instruction, and controlling the second connecting module to start electric energy output; determining a second threshold electric quantity based on the second required electric quantity; and when the residual electric quantity is equal to the second required electric quantity, outputting preset third prompt information through the display module and controlling the second connecting module to stop electric energy output. The second threshold electric quantity can be 10% of the second required electric quantity; the third prompt message includes: the remaining capacity of the power battery will not be sufficient to reach the nearby charging point, please use the capacity carefully.
To achieve the determination of the target point, in one embodiment, determining at least one charging point as the target point based on the charging point distribution includes:
determining a first moving path of the electric automobile to move to the third position of each charging point based on the third position corresponding to the charging point and the first position corresponding to the first positioning information; planning a first moving path by adopting a navigation path planning function;
determining a position relation among a third position where the charging point with the shortest first moving path is located, a first position corresponding to the first positioning information and a second position corresponding to the second positioning information;
and when the third position where the charging point with the shortest first moving path is located is on a second moving path where the electric automobile moves from the first position corresponding to the first positioning information to the second position corresponding to the second positioning information, taking the second position where the charging point with the shortest first moving path is located as the target point.
In one embodiment, determining at least one charging point as a target point based on the charging point distribution comprises:
determining a first moving path of the electric automobile to move to the first position of each charging point based on the third position corresponding to the charging point and the first position corresponding to the first positioning information;
determining a third moving path of the electric automobile moving to the second position corresponding to the second positioning information after the electric automobile is charged from each charging point based on the third position corresponding to the charging point and the second position corresponding to the second positioning information;
acquiring the use state of a charging pile of each charging point;
constructing a scoring vector based on the first moving path, the third moving path and the use state of the charging pile;
acquiring a preset scoring library;
determining the score value corresponding to each charging point based on the score vector and the score library;
and taking the charging point with the maximum score value and larger than a preset score threshold value as a target point.
The working principle and the beneficial effects of the technical scheme are as follows:
scoring each charging point by comprehensively considering a path moving to the charging point, a path returning after the charging point is charged and the use condition of the charging point, wherein the scoring reflects the priority of each charging point, and the higher the scoring is, the more the current charging requirement of a user is met; the use condition of the charging point reflects whether the user can use an idle charging potential when driving to the charging point; the scoring database is established in advance, wherein scoring values are all related to a scoring vector; matching the constructed scoring vectors with scoring vectors corresponding to the scoring values one by one, and determining the corresponding scoring values when the matching is consistent. The matching can adopt a mode of calculating the similarity of the vectors, and the similarity can be calculated by adopting a cosine similarity calculation formula.
In one embodiment, determining at least one charging point as a target point based on the charging point distribution further comprises:
when the score value of the charging point with the maximum score value is smaller than or equal to the score threshold value, constructing a first direction vector based on a first position corresponding to the first positioning information and a third position corresponding to the charging point; the first direction vector points to a third position for the first position;
constructing a second direction vector based on a second position corresponding to the second positioning information and a first position corresponding to the first positioning information; the second direction vector is that the first position points to the third position;
calculating an included angle between the first direction vector and the second direction vector; the calculation of the included angle between the vectors can be calculated by an included angle cosine calculation method;
when the included angle is smaller than or equal to a preset included angle threshold (for example, 90 degrees), extracting a charging point as a point to be selected;
taking a charging point which is closest to the first position in the points to be selected as a reference point;
acquiring a fourth moving path from the reference point to other points to be selected;
and taking the candidate point and the reference point corresponding to the shortest fourth moving path as target points. By determining two target points and using the point to be selected as the alternative of the reference point, the situation that a user does not have a charging potential at the reference point and can charge at the rest point to be selected is avoided,
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 (10)
1. A bidirectional low voltage dc-to-ac inverter comprising: the system comprises a first connecting module, a second connecting module, an inversion module and a control module, wherein the first connecting module is electrically connected with a power battery of the electric automobile; the first connection module, the inversion module and the second connection module are connected in sequence; the second connection module provides a connection interface for connecting a user with other alternating current electric appliances; the control module is respectively in control connection with the first connection module, the second connection module and the inversion module; it is characterized by also comprising: the wireless communication module is electrically connected with the control module;
the control module performs the following operations:
the wireless communication module is connected to a vehicle-mounted computer of the electric automobile;
acquiring state information of the power battery sent by the vehicle-mounted computer;
determining a first required electric quantity required by the return trip;
and controlling the electric energy output of the second connection module based on the state information and the first required electric quantity.
2. The bi-directional low voltage dc to ac inverter of claim 1, further comprising:
the DC-DC transformation module is connected with the first connection module;
and the third connecting module is connected with the DC-DC transformation module and provides a connecting interface for connecting other direct current electric appliances for a user.
3. The bi-directional low voltage dc to ac inverter of claim 2, wherein the control module further performs the following operations:
acquiring a use mode selected by a user;
when the use mode is an electric vehicle-electric vehicle charging mode;
acquiring a first model of an electric automobile used as electric energy output and a second model of the electric automobile needing to input electric energy;
configuring the DC-DC transformation module based on the first model and the second model;
and/or the presence of a gas in the gas,
acquiring the residual electric quantity of the electric automobile as electric energy output;
acquiring the return electric quantity of the electric automobile as electric energy output;
controlling power transmission based on the remaining power and the return power of the electric vehicle as power output;
and/or the presence of a gas in the atmosphere,
acquiring the residual electric quantity of the electric automobile needing electric energy input;
acquiring the return electric quantity of the electric automobile needing electric energy input;
and controlling electric energy transmission based on the residual electric quantity and the return electric quantity of the electric automobile needing electric energy input.
4. The bi-directional low voltage dc to ac inverter of claim 1, wherein the control module determines the first amount of power required for the return trip, comprising:
determining current first positioning information through a vehicle-mounted positioning module;
acquiring second positioning information of a preset first target place;
determining a return path based on the first positioning information and the second positioning information;
and determining the first required electric quantity required by the return process based on the return process path.
5. The bi-directional low voltage dc to ac inverter of claim 4, wherein said determining said first amount of power required for a return trip based on said return path comprises:
extracting the characteristics of the return path to obtain a plurality of characteristic values;
constructing a feature set based on a plurality of the feature values;
acquiring a preset electric quantity determination library;
matching the feature set with a determination set associated with each electric quantity value in the electric quantity determination library;
acquiring the electric quantity value associated with the determined set matched with the feature set as the first required electric quantity required by return trip;
wherein the characteristic values include: one or more of the total length of the path, the number of intersections in the path, the number of crosswalks in the path, the speed limit for each road segment, and the length of the path at each speed limit.
6. The bi-directional low voltage dc to ac inverter of claim 4, wherein said controlling the power output of the second link module based on the status information and the first required amount of power comprises:
analyzing the state information and determining the residual electric quantity of the power battery;
determining a first threshold amount of power based on the first amount of power demand; the first threshold electric quantity is greater than or equal to the first required electric quantity;
when the residual electric quantity is equal to the first threshold electric quantity, outputting preset first prompt information through a display module and controlling the second connecting module to stop electric energy output.
7. The bi-directional low voltage dc-to-ac inverter of claim 6, further comprising: the key is electrically connected with the control module;
the control module further performs the following operations:
after the first prompt message is output through the display module, receiving a power utilization permission instruction of a user through the key;
acquiring the distribution condition of the charging points in a preset distance range around a first position corresponding to the first positioning information;
determining at least one charging point as a target point based on the distribution situation of the charging points;
determining a charging path based on the first positioning information and third positioning information of the target point;
determining a second required electric quantity required by the charging path;
when the second required electric quantity is larger than or equal to the first required electric quantity, rejecting the electricity utilization permission instruction and outputting preset second prompt information;
when the second required electric quantity is smaller than the first required electric quantity, receiving the electricity utilization permission instruction, and controlling the second connection module to start electric energy output; determining a second threshold electric quantity based on the second required electric quantity; and when the residual electric quantity is equal to the second required electric quantity, outputting preset third prompt information through a display module and controlling the second connecting module to stop electric energy output.
8. The bi-directional low voltage dc-to-ac inverter of claim 7, wherein said determining at least one charging point as a target point based on said charging point distribution comprises:
determining a first moving path of the electric automobile to move to a third position where each charging point is located based on a third position corresponding to the charging point and a first position corresponding to the first positioning information;
determining a position relation among a third position where the charging point with the shortest first moving path is located, a first position corresponding to the first positioning information and a second position corresponding to the second positioning information;
and when the third position where the charging point with the shortest first moving path is located is on a second moving path where the electric automobile moves from the first position corresponding to the first positioning information to the second position corresponding to the second positioning information, taking the second position where the charging point with the shortest first moving path is located as the target point.
9. The bi-directional low voltage dc-to-ac inverter of claim 7, wherein said determining at least one charging point as a target point based on said charging point distribution comprises:
determining a first moving path of the electric automobile to the first position of each charging point based on the third position corresponding to the charging point and the first position corresponding to the first positioning information;
determining a third moving path of the electric automobile to move to a second position corresponding to the second positioning information after the electric automobile is charged from each charging point based on a third position corresponding to the charging point and a second position corresponding to the second positioning information;
acquiring the use state of a charging pile at each charging point;
constructing a scoring vector based on the first moving path, the third moving path and the charging pile using state;
acquiring a preset scoring library;
determining a score value corresponding to each charging point based on the score vector and the score library;
and taking the charging point with the maximum score value and larger than a preset score threshold value as the target point.
10. The bi-directional low voltage dc-to-ac inverter of claim 9, wherein said determining at least one charging point as a target point based on said charging point distribution further comprises:
when the score value of the charging point with the maximum score value is smaller than or equal to the score threshold value, constructing a first direction vector based on a first position corresponding to the first positioning information and a third position corresponding to the charging point; the first direction vector points to the third position for the first position;
constructing a second direction vector based on a second position corresponding to the second positioning information and a first position corresponding to the first positioning information; the second direction vector points to the third position for the first position;
calculating an included angle between the first direction vector and the second direction vector;
when the included angle is smaller than or equal to a preset included angle threshold value, extracting the charging point as a point to be selected;
taking the charging point closest to the first position in the points to be selected as a reference point;
acquiring a fourth moving path from the reference point to other points to be selected;
and taking the point to be selected and the reference point corresponding to the shortest fourth moving path as the target point.
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