Method and device for controlling scheduled charging

Abstract

The present invention relates to a method and device for controlling scheduled charging. A method for controlling scheduled charging is provided. The method includes calculating an initial scheduled charging time based on an expected charging time consumption and an expected initial scheduled charging start time, and calculating an expected temperature for the initial scheduled charging time based on the initial scheduled charging time and charger temperature information or climate information. Calculating a corrected expected charging time consumption based on the calculated expected temperature, and calculating a second scheduled charging time based on the corrected expected charging time consumption. Charging a vehicle battery based on the second scheduled charging time.

Description

[0001] CROSS REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2019-0103051, filed on August 22, 2019, which is hereby incorporated by reference as if fully set forth herein. Technical Field

[0003] The present invention relates to a method and a device for controlling scheduled charging, and more particularly to a method and a device for controlling scheduled charging to improve a full charging success rate. Background Art

[0004] In recent years, in response to environmental pollution and efforts to develop and use alternative energy technologies, electric vehicles have been continuously developed. Electric vehicles use an electric motor as a driving source, and a battery as an energy source for driving the electric motor is connected to the motor via an inverter to supply power to the motor. The electric vehicle charges and discharges the battery through scheduled charging, and various data can be used to ensure scheduled charging.

[0005] Figure 1 is a diagram showing an example of determining a charging time using a conventional scheduled charging method according to the related art. Figure 2 It is shown that according to the related art Figure 1 An example chart of the relative battery temperature efficiency. Figure 1 and Figure 2 When the conventional charging reservation method is used to determine the scheduled charging time, the expected charging time D is determined based on the current charging power. chg , and the charging time is determined to meet the expected charging time D chg At the same time, it falls into the cheap charging range D econchg In particular, in order to improve the full charging success rate, it is preferred to charge D prechg .

[0006] However, since the expected charging time D determined based on the charging power at the time point of waiting for scheduled charging is used, chg , so there is a problem that when the actual charging power is less than expected, full charging fails. In addition, the battery has the property that the efficiency greatly changes due to temperature, so there is a problem that when the battery temperature changes substantially from the start of actual charging, full charging fails. Therefore, it is necessary to develop a device that improves the full charging success rate of scheduled charging by determining the scheduled charging time taking into account the increase in battery temperature. Summary of the invention

[0007] The object of the present invention is to provide a method and apparatus for controlling scheduled charging, which considers the efficiency based on battery temperature when determining the scheduled charging time, and uses a procedure for correcting the charging time based on climate information to improve the full charging success rate of the scheduled charging.

[0008] Other advantages, purposes and features of the present invention will be partially set forth in the following description, and will become partially apparent to those skilled in the art after examining the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be realized and obtained by the structures specifically pointed out in the written description and claims and the accompanying drawings.

[0009] In accordance with the purposes of the present invention, as embodied and broadly described herein, a method of controlling scheduled charging may include calculating an initial scheduled charging time based on an expected charging time consumption and an expected initial scheduled charging start time, calculating an expected temperature for the initial scheduled charging time based on the initial scheduled charging time and charger temperature or climate information, calculating a corrected expected charging time consumption based on the calculated expected temperature, and calculating a second scheduled charging time based on the corrected expected charging time consumption.

[0010] In some exemplary embodiments, the calculation of the expected temperature at the first scheduled charging time may include determining whether charger temperature information exists. In addition, the calculation of the expected temperature at the first scheduled charging time may include: when the charger temperature information exists, calculating the expected temperature at the expected first scheduled charging start time based on the charger temperature information.

[0011] The calculation of the expected temperature at the first scheduled charging time may include: when the charger temperature information does not exist, calculating the expected temperature at the expected first scheduled charging start time based on the climate information. The charger temperature information may include time-based temperature information of the charger throughout the day.

[0012] The method may further include comparing the expected temperature of the expected second scheduled charging start time with the expected temperature of the expected first scheduled charging start time. In some exemplary embodiments, the method may further include: when the temperature difference resulting from the comparison is equal to or less than the correction error, determining the second scheduled charging time as the final charging time.

[0013] In addition, the method may include: when the temperature difference generated by the comparison is equal to or greater than the correction error, repeatedly calculating the scheduled charging time to adjust the temperature difference to a preset range. The method may further include, when repeatedly calculating the scheduled charging time in the nth iteration, if the temperature difference between the expected nth scheduled charging start time and the (n-1)th expected initial scheduled charging start time is within the correction error, determining the nth scheduled charging time as the final charging time.

[0014] In another aspect of the present invention, the scheduled charging control device may include: a charging time consumption calculation unit, configured to calculate the expected charging time consumption based on the charging current, the charger connection status and the battery state of charge (SOC); a scheduled charging time determination unit, configured to calculate the expected initial scheduled charging start time; a charging time consumption recalculation unit using climate information, configured to calculate the expected temperature of the initial scheduled charging time based on the initial scheduled charging time and the charger temperature information or the climate information, and calculate the corrected expected charging time consumption based on the calculated expected temperature; and a scheduled charging time correction unit, configured to calculate the second scheduled charging time based on the corrected expected charging time consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this application. The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. In the drawings:

[0016] Figure 1 is a diagram showing an example of determining a charging time using a conventional scheduled charging method according to the related art;

[0017] Figure 2 is a diagram showing the Figure 1 Graphs of examples of related battery temperature efficiencies;

[0018] Figure 3 is a block diagram showing a configuration of a reserved charging control device according to an exemplary embodiment of the present invention; and

[0019] Figure 4 is a diagram illustrating a method of controlling scheduled charging according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0020] It should be understood that the term "vehicle" or "vehicle-related" or other similar terms used herein generally include common motor vehicles, such as passenger vehicles including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft including various boats and ships, and aircraft, etc., and include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g., fuels obtained from resources other than petroleum). As mentioned herein, a hybrid vehicle is a vehicle having two or more power sources, for example, a vehicle having both gasoline power and electric power.

[0021] Although the exemplary embodiments are described as using multiple units to perform the exemplary processes, it should be understood that the exemplary processes can also be performed by one or more modules. In addition, it should be understood that the term controller / control unit refers to a hardware device including a memory and a processor. The memory is configured to store the modules, and the processor is specifically configured to execute the modules to perform one or more processes further described below.

[0022] In addition, the control logic of the present invention may be implemented as a non-transitory computer readable medium on a computer readable medium containing executable program instructions executed by a processor, a controller / control unit, etc. Examples of computer readable media include, but are not limited to, ROM, RAM, compact disk (CD)-ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage device. The computer readable recording medium may also be distributed in a network-connected computer system so that, for example, through a telematics server or a controller area network (CAN), the computer readable medium is stored and executed in a distributed manner.

[0023] The terms used herein are only used to illustrate the purpose of specific embodiments, and are not intended to limit the present invention. As used herein, the singular forms "one" and "the" are intended to include plural forms as well, unless the context clearly indicates otherwise. It should also be understood that when used in this specification, the words "include" and / or "comprise" specify the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or their groups. As used herein, the word "and / or" includes any and all combinations of one or more related listed items.

[0024] Unless otherwise specified or apparent from the context, the term "about" as used herein should be understood to be within the normal tolerance range in the art, such as within 2 standard deviations of the mean. "About" can be understood to be within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05%, or 0.01% of the stated value. Unless otherwise clear from the context, all numerical values ​​provided herein are modified by the term "about".

[0025] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are shown in the accompanying drawings. In the description of exemplary embodiments, it will be understood that when an element is referred to as being "on", "under", "before" or "after" another element, the element may be directly on the other element, or there may be an intermediate element. It will be understood that, although the terms "primary", "secondary", "A", "B", "(a)", "(b)", etc. may be used herein to describe the various elements of the present invention, these terms are only used to distinguish one element from another element, and the basic order or sequence of the corresponding elements is not limited by these terms.

[0026] It should be understood that when an element is referred to as being "connected to", "coupled to" or "accessed to" another element, the element may be "connected to", "coupled to" or "accessed to" another element via a further element, or the element may be directly connected to or directly accessed to another element. Unless otherwise mentioned, all terms including technical or scientific terms have the same meaning as those generally understood by persons with ordinary skills in the field to which the present invention belongs. From the context, general terms such as those defined in dictionaries should be interpreted as being consistent with the meaning of the relevant technology. Unless defined differently in the present invention, these terms should not be interpreted in an ideal or excessive form.

[0027] Figure 3 is a block diagram showing a configuration of a scheduled charging control device according to an exemplary embodiment of the present invention. Figure 3 The scheduled charging control device may include a scheduled charging time determination unit 310, a charging time consumption calculation unit 320, a charging time consumption recalculation unit 330 using climate information, and a scheduled charging time correction unit 340. Each unit of the device may be operated by a controller having a processor and a memory. In particular, the controller may be specifically programmed to perform the operations of the units.

[0028] The scheduled charging time determination unit 310 may be configured to calculate the expected initial scheduled charging start time based on the cheap charging time range, information about whether the cheap charging time range is used, and the expected departure time information. In some exemplary embodiments, the scheduled charging time determination unit 310 may be configured to determine the scheduled charging time using a method that considers the departure time, the cheap charging time range, and the cheap charging range.

[0029] The scheduled charging time determination unit 310 may be configured to determine the scheduled charging time based on a cheap charging time range. In particular, the cheap charging time range may be a time range in which charging may be discounted, such as at night according to low power demand in a country / region. In some exemplary embodiments, the scheduled charging time determination unit 310 may be configured to set the scheduled charging time only within the cheap charging time range. Scheduled charging may be performed only within the cheap charging time range, and even if full charging is not achieved, charging may be performed only within the corresponding time range.

[0030] In addition, the scheduled charging time determination unit 310 can be configured to set the scheduled charging time within a cheap charging time range. The scheduled charging can be performed to complete the charging before the set departure time while including as long a cheap charging time range as possible (e.g., a maximum cheap charging time range). The charging time consumption calculation unit 320 can be configured to calculate the expected charging time consumption of the battery based on the charging current, charger connection status, and battery state of charge (SOC) received from the vehicle's battery management system (BMS).

[0031] The charging time consumption recalculation unit 330 (e.g., recalculation unit) using climate information may be configured to calculate the expected temperature of the first scheduled charging time based on the expected first scheduled charging start time received from the scheduled charging time determination unit 310, the expected charging time consumption received from the charging time consumption calculation unit 320, the charger temperature information, or the climate information. Therefore, the charging time consumption recalculation unit 330 using climate information may be configured to calculate the expected temperature (T) of the expected first scheduled charging start time using the following equation 1: Bat , pred1 ).

[0032] Equation 1

[0033]

[0034] In particular, the charging time consumption recalculation unit 330 using climate information may be configured to use time-based temperature information (T char , pred ) to calculate the expected temperature (TBat , pred1 ). When the time-based temperature information (T char,pred ) does not exist (eg, is unavailable), the charging time consumption recalculation unit 330 using climate information may be configured to use the weather forecast climate information T forecast1 To calculate the expected temperature (T Bat,pred1 ).

[0035] In addition, the charging time consumption recalculation unit 330 using climate information may be configured to calculate the battery efficiency and battery SoC at the expected temperature based on the calculated SoC using the following equation 2: bat To calculate the corrected expected initial charging time consumption (D chg,adj1 ).

[0036] Equation 2

[0037] D chg，adj1 =f{η(T Bat，pred1 ), SOC bat}.

[0038] In particular, the charging time consumption may be time consumption data based on a pre-stored temperature. In other words, the charging time consumption required for the corrected expected initial charging time consumption may be application data obtained in advance through a time consumption test based on temperature. Therefore, the charging time consumption recalculation unit 330 using climate information may be configured to calculate the corrected expected initial charging time consumption (D chg,adj1 ) is sent to the scheduled charging time correction unit 340.

[0039] The scheduled charging time correction unit 340 may be configured to calculate the expected initial charging time consumption (D chg,adj1 ) to recalculate the second scheduled charging start time. Then, the scheduled charging time correction unit 340 may be configured to send the recalculated second scheduled charging start time to the charging time consumption recalculation unit 330 using the climate information, and the scheduled charging time correction unit 340 may be configured to receive the corrected expected second charging time consumption (D) corresponding to the second scheduled charging start time from the charging time consumption recalculation unit 330 using the climate information. chg,adj2 ).

[0040] The corrected expected second charging time consumption (D chg,adj2 ) can be based on the expected temperature (T) at the expected second scheduled charging start time calculated using the following equation 3 Bat,pred2 ) to calculate.

[0041] Equation 3:

[0042]

[0043] In other words, the charging time consumption recalculation unit 330 using climate information may be configured to use the time-based temperature information (T char,pred ) to calculate the expected temperature (T Bat,pred2 In particular, when the time-based temperature information (T char,pred ) does not exist (eg, is unavailable), the charging time consumption recalculation unit 330 using climate information may be configured to use the weather forecast climate information climate T forecast1 To calculate the expected temperature (T Bat,pred1 ).

[0044] Therefore, the scheduled charging time correction unit 340 may be configured to receive the corrected expected second charging time consumption (D chg,adj2 ), which is calculated by the charging time consumption recalculation unit 330 using climate information based on the charger temperature information or the weather forecast climate information at the second scheduled charging start time.

[0045] The scheduled charging time correction unit 340 may be configured to compare the expected temperature of the expected second scheduled charging start time with the expected temperature of the expected first scheduled charging start time. Then, the scheduled charging time correction unit 340 may be configured to correct the temperature when the temperature difference is equal to or less than the correction error E. adj When the second scheduled charging time is determined as the final charging time. In some exemplary embodiments, the correction error may be a temperature at which the difference in charging time consumption is within about five minutes.

[0046] The scheduled charging time correction unit 340 may be configured to correct the temperature difference when the temperature difference is equal to or greater than the correction error E. adj , the third scheduled charging time is calculated by the procedure of the charging time consumption recalculation unit 330 using the climate information. Therefore, the scheduled charging time correction unit 340 can be configured to repeatedly execute the above procedure, and when the temperature difference between the nth scheduled charging start time and the (n-1)th expected initial scheduled charging start time is within the correction error E adj , the scheduled charging time correction unit 340 may be configured to determine the nth scheduled charging time as the final charging time using Equation 4 below.

[0047] Equation 4

[0048] Scheduleadj，fin =Schedule adjn

[0049] {if abs(T Bat，pred n -T Bat，pred(n-1) ) ＜ ∈ adj}.

[0050] Therefore, according to another exemplary embodiment of the present invention, the scheduled charging time correction unit 340 may be configured to optimize the scheduled charging time based on the determined final charging time, and thus may improve the full charging success rate of the scheduled charging of the battery.

[0051] Figure 4 is a diagram showing a method of controlling scheduled charging according to an exemplary embodiment of the present invention. Figure 4 , the scheduled charging control device may be configured to determine whether to perform scheduled charging (S410). When operation S410 is satisfied, if the iteration of performing scheduled charging is n=1 (S420), the charging time consumption recalculation unit 330 using climate information may be configured to determine whether charger temperature information exists or is available (S430).

[0052] When the operation S430 is satisfied, the charging time consumption recalculation unit 330 using the climate information may be configured to use the time-based temperature information (T char , predn ), to calculate the expected temperature (T Bat , predn )(S440). When the operation S430 is not satisfied, the charging time consumption recalculation unit 330 using the climate information may be configured to use the weather forecast climate information T forecastn To calculate the expected temperature (T Bat,predn )(S445).

[0053] After operation S440 or S445, the charging time consumption recalculation unit 330 using climate information may be configured to calculate the battery efficiency and battery SoC (SoC) at the expected temperature. bat ) to calculate the corrected expected (n-1)th charging time consumption (D chg，adjn-1 After operation S450, the scheduled charging time correction unit 340 may be configured to correct the expected (n-1)th charging time consumption based on the correction. chg，adjn-1 ) to calculate the nth scheduled charging time (S460).

[0054] After operation S460, the scheduled charging time correction unit 340 may be configured to determine an expected temperature (T Bat，predn ) and the expected temperature (T Bat，predn-1 ) is equal to or less than the correction error E adj (S470). When operation S470 is satisfied, if the temperature difference is equal to or less than the correction error E adj , the scheduled charging time correction unit 340 may be configured to set the nth scheduled charging time schedule adjn Determine the final charging time (schedule adj,fin )(S480).

[0055] The above-mentioned scheduled charging control device can consider the efficiency based on the battery temperature and use a procedure for correcting the charging time based on the climate information to improve the full charging success rate of the scheduled charging. In addition, the method for controlling scheduled charging according to the present invention can use the charger temperature information or the weather forecast climate information to correct the actual charging time when determining the time to perform the scheduled charging function.

[0056] According to the present invention, the charging time can be recalculated using the corrected expected charging time, and the full charging success rate of the scheduled charging can be improved. When the expected battery temperature difference between the correction time and the initial time is large enough according to the correction time, the correction can be repeatedly performed to adjust the expected battery temperature difference to within a preset range. Therefore, the scheduled charging time can be optimized, and the charging time can be applied based on the temperature, thereby improving the full charging success rate. In addition, after the charging time is corrected, the vehicle controller can be configured to charge the vehicle battery based on the corrected final charging time.

[0057] Those skilled in the art will appreciate that the effects that can be achieved by the present invention are not limited to those specifically described above, and other advantages of the present invention will be more clearly understood from the detailed description.

[0058] The present invention may also be implemented as a computer-readable code on a non-transitory computer-readable recording medium. A non-transitory computer-readable recording medium is any data storage device that stores data that can be subsequently read by a computer system. Examples of non-transitory computer-readable recording media include read-only memories (ROMs), random access memories (RAMs), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like. The non-transitory computer-readable recording medium may also be distributed to networked computer systems to store and execute computer-readable codes in a distributed manner. In addition, programmers in the field to which the present invention belongs may easily understand the functional programs, codes, and code segments used to implement the present invention.

Claims

1. A method for controlling scheduled charging, comprising: calculating, by the controller, an initial scheduled charging time based on an expected charging time consumption and an expected initial scheduled charging start time; calculating, by the controller, an expected temperature at the first scheduled charging time based on the first scheduled charging time and based on charger temperature information or climate information; calculating, by the controller, a corrected expected charging time consumption based on the calculated expected temperature; calculating, by the controller, an expected second scheduled charging start time based on the corrected expected charging time consumption; The step of calculating the expected temperature of the first scheduled charging time includes: determining whether the charger temperature information is available; The step of calculating the expected temperature at the first scheduled charging time includes: when the charger temperature information is unavailable, the controller calculates the expected temperature at the expected first scheduled charging start time based on the climate information; Also includes: comparing, by the controller, the expected temperature at the expected second scheduled charging start time with the expected temperature at the expected first scheduled charging start time; determining, by the controller, the expected second scheduled charging start time as a final charging time when a temperature difference resulting from comparing the expected temperature of the expected second scheduled charging start time with the expected temperature of the expected first scheduled charging start time is equal to or less than a correction error; and The controller charges a battery of the vehicle based on the final charging time.

2. The method according to claim 1, wherein: Calculating the expected temperature for the first scheduled charging time includes: When the charger temperature information is available, the expected temperature at the expected first scheduled charging start time is calculated by the controller based on the charger temperature information.

3. The method according to claim 2, wherein: The charger temperature information includes time-based temperature information of the charger throughout the day.

4. The method according to claim 1, further comprising: When a temperature difference generated by comparing the expected temperature of the expected second scheduled charging start time with the expected temperature of the expected first scheduled charging start time is equal to or greater than a correction error, the controller repeatedly calculates the scheduled charging time to adjust the temperature difference to a preset range.

5. The method according to claim 4, further comprising: When the scheduled charging time is repeatedly calculated at an nth iteration, if the temperature difference between the expected nth scheduled charging start time and the n-1th expected initial scheduled charging start time is within the correction error, the controller determines the nth scheduled charging time as the final charging time. 6 . A non-transitory computer-readable recording medium having recorded thereon a program for executing the method according to claim 1 .

7. A scheduled charging control device, comprising: a charging time consumption calculation unit configured to calculate an expected charging time consumption based on a charging current, a charger connection state, and a battery charging state SoC; a scheduled charging time determination unit configured to calculate an expected first scheduled charging start time; a charging time consumption recalculation unit using climate information configured to calculate an expected temperature at the first scheduled charging time based on the first scheduled charging time and based on charger temperature information or climate information, and to calculate a corrected expected charging time consumption based on the calculated expected temperature; The scheduled charging time correction unit is configured as follows: calculating an expected second scheduled charging start time based on the corrected expected charging time consumption, wherein the charging time consumption recalculation unit using climate information is configured to determine whether the charger temperature information is available, The charging time consumption recalculation unit using climate information is configured to calculate an expected temperature of the expected first scheduled charging start time based on the climate information when the charger temperature information is unavailable, The scheduled charging time correction unit is configured to compare the expected temperature at the expected second scheduled charging start time with the expected temperature at the expected first scheduled charging start time. wherein the scheduled charging time correction unit is configured to: when a temperature difference generated by comparing the expected temperature of the expected second scheduled charging start time with the expected temperature of the expected first scheduled charging start time is equal to or less than a correction error, determine the expected second scheduled charging start time as the final charging time; and A vehicle controller is configured to perform charging of a vehicle battery based on the final charging time.

8. The scheduled charging control device according to claim 7, wherein: The charging time consumption recalculation unit using climate information is configured to calculate an expected temperature of the expected initial scheduled charging start time based on the charger temperature information when the charger temperature information is available.

9. The scheduled charging control device according to claim 8, wherein: The charger temperature information includes time-based temperature information of the charger throughout the day.

10. The scheduled charging control device according to claim 7, wherein: The charging time consumption recalculation unit using climate information is configured to repeatedly calculate the scheduled charging time to adjust the temperature difference to a preset range when a temperature difference generated by comparing the expected temperature at the expected second scheduled charging start time with the expected temperature at the expected first scheduled charging start time is equal to or greater than a correction error.

11. The scheduled charging control device according to claim 10, wherein: When the scheduled charging time is repeatedly calculated at an nth iteration, if a temperature difference between an expected nth scheduled charging start time and an n-1th expected initial scheduled charging start time is within the correction error range, the scheduled charging time correction unit is configured to determine the nth scheduled charging time as a final charging time.

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