Vehicle-mounted charging system

Abstract

This on-vehicle charging system charges a battery mounted on an electric vehicle with electric power supplied from a home, and includes: an external environment detection unit mounted on the electric vehicle and detecting external environment information regarding an external environment around the electric vehicle; an information acquisition unit that acquires facility information about an electrical device present in the home; a power consumption estimation unit that calculates a power consumption estimate of the electrical device present in the home when charging the battery based on the external environment information and the facility information;and a charging power determination unit that determines a charging plan for the battery based on the power consumption estimate, wherein the charging power determination unit determines the charging plan in such a manner that a sum of the charging power of the battery and the power consumption estimate falls below an upper limit of the electric power that can be consumed in the home.;

Description

Technical area

[0001] The present invention relates to an on-vehicle charging system. background

[0002] Conventionally, a charging system that charges an electric vehicle battery using externally supplied electric power to a home has been known (see, for example, PTL 1). The home is equipped with a power detection device provided between a distribution board and a power load located in the home, and an electric vehicle charger including a charging controller, a converter, a charging paddle, and the like. The charging controller continuously detects the power load state of the power load located in the home through the power detection device.

[0003] When charging an electric vehicle's battery, the paddle of the electric vehicle charger is connected to an input of the electric vehicle. The charging controller provided in the electric vehicle charger receives a signal related to a battery condition or the like from the electric vehicle via a communication antenna, calculates the charging power for the electric vehicle, and sends a control signal for this to the electric vehicle. Citation listPatent literature

[0004] PTL 1: JP 5168891 B2 Overview of the inventionTechnical problem

[0005] However, in the device described in PTL 1, a special equipment such as the power detection device that detects a power load state of the power load located in the home and the charging controller that calculates the charging power is required in the home. Solution to the problem

[0006] An on-vehicle charging system according to one aspect of the present invention charges a battery mounted in an electric vehicle with electric power supplied from a home, the on-vehicle charging system including: an external environment detection unit mounted on the electric vehicle and detecting information about the external environment around the electric vehicle; an information acquisition unit that acquires device information about an electrical device provided in the home; a power consumption estimation unit that calculates a power consumption estimation value of the electrical device provided in the home when charging the battery based on the external environment information and the device information;and a charging power determination unit that determines a charging plan for the battery based on the power consumption estimate, wherein the charging power determination unit determines the charging plan in such a manner that a sum of the charging power of the battery and the power consumption estimate falls below an upper limit of the electrical power that can be absorbed in the home.; Advantageous effects of the invention

[0007] The present invention enables the estimation of an amount of electrical power consumed in the home and the creation of a charging plan using only the electric vehicle, without the need for a device that estimates an amount of electrical power consumed in the home and creates a charging plan. Brief description of the drawings [ Fig. 1] Fig. 1 is a diagram for describing a first embodiment of the present invention. [ Fig. 2] Fig. Figure 2 is a functional block diagram of an integrated controller. [ Fig. 3] Fig. 3 is a diagram for describing the estimation of power consumption by a power consumption estimation unit. [ Fig. 4] Fig. Figure 4 is an example of a power consumption forecast for a home. [ Fig. 5] Fig. 5 is a diagram for describing details of generating a charging plan. [ Fig. 6] Fig. Figure 6 is a diagram illustrating an example of a charging plan. [ Fig. 7] Fig. Figure 7 is a flowchart illustrating a series of processes performed by an on-board charging system. [ Fig. 8] Fig. 8 is a flowchart showing the detailed processing of an information acquisition process of the Fig. 7 illustrated step S202. [ Fig. 9] Fig. 9 is a block diagram for describing a second embodiment of the present invention. [ Fig. 10] Fig. 10 is a flowchart for describing an operation of an on-vehicle charging system according to the second embodiment. [ Fig. 11] Fig. 11 is a flowchart showing an example of details of the processing in step S220 in Fig. 10 illustrates the loading plan modification processing. [ Fig. 12] Fig. 12 is a diagram illustrating a display example of an information presentation unit. [ Fig. 13] Fig. 13 is a diagram illustrating another display example of the information presentation unit. [ Fig. 14] Fig. 14 is a block diagram for describing a third embodiment of the present invention. [ Fig. 15] Fig. 15 is a flowchart for describing a first modification. [ Fig. 16] Fig. 16 is a flowchart for describing a second modification. Description of the embodiments

[0008] Embodiments of a semiconductor device according to the present invention will be described below with reference to the drawings. The following description and the following drawings are examples for describing the present invention, and may be partially simplified or omitted for clarity of description. In the following description, the same or similar elements and processes are denoted by the same reference numerals, and redundant description may be omitted. Note that the following description merely indicates examples of embodiments of the present invention, and the present invention is not limited to the following embodiments and may be implemented in various other ways. (First embodiment)

[0009] Fig. 1 is a diagram for describing a first embodiment of the present invention, showing facility configurations of an electric vehicle 1 and a home 2. The home 2 trades electricity from an electric utility company through a power system 21. A distribution panel 24 provided in the home 2 is connected to the power system 21 via an electric power meter 22 for measuring sold and purchased electricity and an ampere breaker 23 for interrupting an electric power supply when the electricity exceeds a volume of electric power contracted with the electric utility company. The distribution panel 24 distributes electricity to an electrical load 25 and a socket 26 used in the home 2.

[0010] The electric vehicle 1 includes an on-board charging system 10 with an on-board charger 12 and a battery 11 for powering the vehicle. The on-board charger 12 includes a charger controller 13 for controlling a voltage and current when charging the battery 11. The battery 11 includes a battery sensor 14 for monitoring a battery condition.

[0011] The on-vehicle charging system 10 further includes an integrated controller 110, an external environment detection unit 120, and an information acquisition unit 130. The integrated controller 110, the external environment detection unit 120, and the information acquisition unit 130 are configured to communicate with the charger controller 13 and the battery sensor 14 via a communication bus 16. The details of the integrated controller 110, the external environment detection unit 120, and the information acquisition unit 130 will be described later. The integrated controller 110 includes a computing unit including a CPU and the like, and a storage unit including a memory such as a RAM and a ROM and a recording medium such as a hard disk and a CD-ROM, and functions as the integrated controller 110 by executing a program stored in the storage unit.

[0012] When charging the battery 11 of the electric vehicle 1, the on-board charger 12 is connected to the socket 26 of the home 2 via a charging cable 27. Although not shown, the charging cable 27 includes a control box. The control box checks a connection status with the electric vehicle 1 and informs the charger controller 13 and the integrated controller 110 of information such as whether or not electric power can be supplied and a value of the current that can be supplied to the electric vehicle 1. The integrated controller 110 generates a charging plan for charging the battery, as described later.

[0013] The charger controller 13 detects the state of charge and temperature of the battery 11 via the battery sensor 14. When the charger controller 13 receives a message indicating that electric power supply is possible with the charging cable 27, the on-vehicle charger 12 charges the battery 11. The charger controller 13 charges the battery 11 by controlling the voltage and current of the on-vehicle charger 12 based on the charging plan created by the on-board controller 110 and the state of charge and temperature of the battery 11 that have been detected. <Einheit 120 zur Erkennung der äußeren Umgebung>

[0014] The external environment detection unit 120 is an on-board sensor provided in the electric vehicle 1 and includes, for example, a camera, a radar, a global positioning system (GPS) device, an acceleration sensor, and the like, in addition to an air temperature sensor, an illuminance sensor, a humidity sensor, a raindrop sensor, and the like. The detection information from the air temperature sensor, the illuminance sensor, and the humidity sensor is used to calculate and correct electric power consumed by an air conditioner, a refrigerator, or the like as the electrical load 25 used in the home 2. The raindrop sensor is used to estimate the operating state of a lighting device, a washing and drying machine, etc. as the electrical load 25.The camera and radar are used to detect a garage or covered parking space provided in the home 2. The above-described detection is performed when the vehicle is detected to be moving or outdoors. The GPS device is used to detect position information regarding the position of the electric vehicle 1. The acceleration sensor is used to detect, for example, an earthquake. When an earthquake is detected, charging is stopped. <Informationserfassungseinheit 130>

[0015] The information acquisition unit 130 includes, for example, a human-machine interface included in the electric vehicle 1 and includes an input unit. A touch panel-type display device, for example, is suitable as the human-machine interface. Such a human-machine interface can be used for various settings and adjustments of the driving characteristics of the electric vehicle 1 and a comfort device, and can also be used as a navigation system and audio system. The user can transmit information to the on-board charging system 10 while driving the electric vehicle 1 by operating the input unit of the information acquisition unit 130. The user operates the input unit of the information acquisition unit 130 to input information about the electrical load 25 that consumes electrical power into the on-board charging system 10.The entered information is stored in the memory unit of the integrated controller 110 described above.

[0016] Examples of the information regarding the electrical load 25 include a contracted volume with an electricity company, which is an upper limit of the power capacity of the home 2, the availability of a plan that changes electricity prices based on a period according to the contract details and a period and electricity prices according to the contract details, a room layout and structure of the home 2, home information including a home type such as a single-family home and an apartment building, hot water supply, heating equipment, and the like, home appliance information about home appliances in the home 2, and the like. The home appliance information includes information necessary for estimating power consumption, such as a type and power consumption of the home appliance, a period of time during which the home appliance is used, and an operation time.Examples of household appliances include AV household appliances such as a television, a radio, and an electronic musical instrument; home information appliances such as a personal computer, a video game console, and a telephone; electrical household appliances such as a washing machine and a vacuum cleaner; electrical cooking appliances such as a refrigerator, a rice cooker, and a microwave oven; seasonal household appliances such as an air conditioner, an electric fan, an electric furnace, and an electric blanket; and residential fixtures such as a lighting fixture, a heat pump water heater, and a ventilation fan.

[0017] Note that, in the present embodiment, a touch panel type display device such as a navigation system provided in the electric vehicle 1 is described as an example of the information acquisition unit 130. However, the present invention is not limited to this, and any device capable of acquiring information necessary for estimating the power consumption of the home 2 may be used. For example, the information acquisition unit 130 may be configured on a server to which a resident of the home 2 can be connected from any terminal via the Internet or the like. The electric vehicle 1 is provided with a device (for example, a display device) that forms part of the information acquisition unit 130.When the user inputs the capacity of the ampere breaker 23 of the home 2, the household appliance information about household appliances in the home 2, and the like from the information acquisition unit 130 to the server, the vehicle refers to these pieces of information via a communication system (not shown) and acquires these pieces of information on the vehicle side. <Integrierter Controller 110>

[0018] Fig. 2 is a functional block diagram of the integrated controller 110. The integrated controller 110 includes at least a power consumption estimation unit 111 and a charging power determination unit 112.

[0019] The power consumption estimation unit 111 receives external environment information detected by the external environment detection unit 120 and information about the electrical load 25 acquired by the information acquisition unit 130. The power consumption estimation unit 111 generates an operation pattern for each household appliance based on these pieces of input information and estimates the power consumption of the home 2. Details of the estimation processing will be described later.

[0020] The charging power determination unit 112 receives the information regarding the electrical load 25 acquired by the information acquisition unit 130, battery information (the state of charge or temperature of the battery 11) acquired by the battery sensor 14, and a power consumption prediction (also referred to as a power consumption estimate) of the home 2 estimated by the power consumption estimation unit 111. The charging power determination unit 112 sets an upper limit of the electrical power at which the ampere breaker 23 interrupts the current (a state in which the breaker is tripped) from the acquired information about the electrical power contract of the home 2.In addition, the charging power determination unit 112 generates a charging plan based on the power consumption prediction of the home 2 estimated by the power consumption estimation unit 111 and the battery information from the battery sensor 14 such that the sum of the power consumption prediction of the home 2 and the electric power for charging the battery 11 does not become equal to or greater than the upper limit of the electric power.

[0021] For example, the charging schedule is provided in the form of a table that specifies the time and the upper limit (hereinafter referred to as the charging power limit) of the electric power usable for charging the battery 11. The generated charging schedule is output to the charger controller 13. The charger controller 13 charges the battery 11 according to the charging schedule with an electric power equal to or less than the charging power limit. <Schätzung der in dem Zuhause 2 aufgenommenen Leistung durch die Leistungsaufnahme-Schätzeinheit 111>

[0022] Fig. 3 is a diagram for describing the estimation of power consumption by the power consumption estimation unit 111. The estimation of power consumption refers to predicting a transition of power consumption in the home 2 from a time t1 at which the electric vehicle 1 starts charging to a time t2 at which the charging of the battery 11 ends. The estimation result is generated as a power consumption profile map (or table) plotted with a horizontal axis representing time and a vertical axis representing electric power. Fig. The example shown in Figure 3 illustrates a case where the electric vehicle 1 comes home at 10:00 a.m. (time t1) and charging has started since then and ends at 10:00 p.m. (time t2). Fig. 3 illustrates a case where charging is completed by 22:00, but there is no problem performing a prediction for any time after 22:00. For example, the time to perform the prediction can be determined independently of the time to end charging, such as 24 hours in advance or 48 hours in advance. Performing the prediction about the time at which charging ends provides the following advantage. Specifically, even in a case where, for example, charging of the battery 11 of the electric vehicle 1 has not been completed as scheduled, it is possible to determine whether or not the charging has exceeded the contracted power of the home 2 even if charging continues, and thus it is possible to prevent the home 2 from suffering a power failure.

[0023] The power consumption estimation unit 111 generates a power consumption prediction for each household appliance, as shown in the Fig. 3(a), Fig. 3(b) and Fig. 3(c), based on the information about the home appliances used in the home 2 acquired by the information acquisition unit 130. At this time, the power consumption estimation unit 111 classifies the home appliances into categories according to usage mode, power consumption, etc., estimates the power consumption corresponding to each category, and generates the power consumption prediction.

[0024] Fig. Figure 3(a) is an example of a power consumption prediction for a household appliance, such as a home AV appliance or a home information device, which is assumed to be generally in operation while the occupant is in Home 2. Such a household appliance consumes almost constant power regardless of environmental factors such as temperature and thus reflects the power consumption value entered by the user. For example, during a period when the occupant of Home 2 appears to be asleep, the power consumption may be set to 0, or the occupant's sleep time may be detected and the detected time may be set to be adjustable. Furthermore, a designer may specify in advance that a value corresponding to 1 / 10 of the standby power is applied during a period between 0:00 and 5:00.

[0025] Fig. 3(b) illustrates an example of the performance prediction of the household appliance in which the power consumption varies depending on the outdoor temperature, humidity, and the like, and illustrates the performance prediction of an air conditioner. The efficiency of a device such as an air conditioner or a refrigerator that operates based on a heat pump cycle as a working principle changes depending on a temperature setting condition or the temperature of an environment around the location where the device is installed. Therefore, it is preferable to correct and estimate the power consumption of the air conditioner or refrigerator as necessary based on, for example, the measurement results of the air temperature and solar radiation intensity by the air temperature sensor and the illuminance sensor as the external environment detection unit 120.The air conditioner consumes a large amount of electrical power after starting, and the electrical power changes so that the power consumption decreases as the temperature of an air-conditioned room approaches a set temperature.

[0026] Fig. Figure 3(b) shows an example where the air conditioner is started from time t1, when charging is started. Here, the power consumption prediction is generated under the assumption that the air conditioner consumes electrical power equal to the rated power consumption immediately after startup and then enters steady-state operation, consuming a constant electrical power depending on the outside air temperature. For example, it is assumed that it takes one hour to transition to the power consumption during continuous operation after the air conditioner is activated and operates at the rated power.For the power consumption during continuous operation, the power consumption value is set by referring to a power consumption map for continuous operation based on the air temperature and the illuminance in the environment of the home 2 detected by the external environment detection unit 120.

[0027] Examples of a method for adjusting the power consumption value during continuous operation include a method described in the non-patent literature (Tsuyoshi Ueno, Hiroyuki Kitahara, Development of a heat source characteristic model for room air conditioners, Report of the Central Research Institute of Electric Power Industry, Full Report, R09 (2015), https: / / criepi.denken.or.jp / hokokusho / pb / reportDetail?repor tNoUkCode=R09) (see 2022, 8, 18). In addition, the power consumption of the air conditioner can be calculated from information about the home 2 calculated by the information acquisition unit 130 by a method described in the non-patent literature (National Research and Development Institute; Technical Information on Evaluation of Energy Consumption Performance According to the 2016 Energy Saving Standards (Houses), https: / / www.kenken.go.jp / becc / documents / house / 4-3_210401_v07.pdf) and (see 2022, 8, 18).

[0028] Fig. Figure 3(c) shows a performance prediction of a household appliance that generates power consumption depending on a time period and a household appliance that generates power consumption depending on the weather, and shows a performance prediction of an IH heating appliance, which is an electric cooking appliance, as an example. Examples of household appliances that generate power consumption depending on a time period include electric cooking appliances, electrical household appliances, and lighting devices. Examples of household appliances that generate power consumption depending on the weather include lighting devices and washing and drying machines.

[0029] In the case of a household appliance that generates power consumption depending on a time period, the information acquisition unit 130 records the power consumption value and the time period during which the household appliance is primarily used, and reflects the power consumption value and the time period in the plan. As a time period, a day is divided into intervals of one hour, 30 minutes, or three hours, and the user can select the time period during which to use the household appliance. In the case of the Fig. 3(c), a demand for electric power consumption is generated approximately at the time the occupant of home 2 eats a meal, and thus a schedule is generated based on the time the occupant eats a meal. Regarding a device activated by a timer (water heater), its operating time is recorded by the occupant or the device.

[0030] In the case of a household appliance that generates power consumption depending on the weather, the occurrence of power consumption is estimated based on detection information from the raindrop sensor or the illuminance sensor as the external environment detection unit 120. For example, for the washing and drying machine, a power consumption prediction is planned by assuming that power consumption occurs when rain is detected by the raindrop sensor and acquiring information indicating that the user uses the washing and drying machine in rainy weather.

[0031] In the case of a lighting device that generates power consumption depending on a period of time and the weather, the amount of power consumption is predicted by determining the number of lighting devices according to the room layout and the number of rooms from the home information acquired by the information acquisition unit 130. The power consumption estimation unit 111 generates an operation forecast from the period after sunset or ambient illuminance information obtained from the external environment detection unit 120 as an illuminance sensor, and predicts the power consumption forecast based on the operation forecast.For example, in a case where the brightness is assumed to be insufficient even before sunset, such as during rainy weather, an operation prediction is generated that assumes that a lighting device will be used. Furthermore, the time period during which the lighting device is used can be determined based on the sunset of the previous day or the sunset of the past week detected by the external environment detection unit 120.

[0032] Fig. 4 is an example of a power consumption forecast for home 2, which is calculated by adding the power consumption of the Fig. 3(a), Fig. 3(b) and Fig. 3(c) shown household appliances. In Fig. 4, a line represented by a solid line indicates a power consumption prediction, and a line represented by a broken line indicates an upper limit for the power consumption at which the ampere breaker 23 trips. Obviously, this is only the power consumption predicted in the home 2, so the actual power consumption may not necessarily correspond to the Fig. 4 shown predicted value. The Fig. 3(a), Fig. 3(b) and Fig. 3(c) illustrates the cases using a television, a lighting device, an air conditioner, and an IH heater as examples, but it is obvious that other household appliances may be used in the home 2. Regarding other household appliances and electrical power loads to be used, a prediction appropriate to their usage mode is performed, and the power consumption is predicted in a similar manner.

[0033] For home appliances and the like used in the home 2, the power consumption, which fluctuates due to the usage mode and the influence of the external environment, is different as described above. An operation pattern is set in advance not only for the lighting device, TV, air conditioner, and IH heater described above, but also for home appliances and the like that can be used in the home 2, and the power value is corrected using information provided by the user, whereby a power consumption pattern can be set for each home appliance. For the IH heater and the like, a period of time during which the occupant of the home 2 generally eats a meal is collected as the home appliance information described above. <Erzeugung eines Ladeplans durch die Ladeleistung-Bestimmungseinheit 112>

[0034] Fig. 5 is a diagram for describing details of the generation of the charging plan by the charging power determination unit 112. In Fig. 5, a broken line indicating the upper power consumption and a solid line indicating the power consumption prediction in the home 2 are the same as the broken line indicating the upper power consumption and the solid line indicating the power consumption prediction in the home 2 shown in Fig. 4. The charging power determination unit 112 plans the electric power that can be used by the on-vehicle charger 12 to charge the battery 11 based on the power consumption prediction in the home 2 estimated by the power consumption estimation unit 111 and the upper power consumption limit in the home 2 acquired by the information acquisition unit 130.

[0035] In Fig. In Figure 5, a thick solid line shows the charging schedule for the battery 11 by the on-board charger 12, and a thick dashed line shows the total power consumption obtained by adding a power consumption forecast Whome in the home 2 and the electric power Wchg of the charging schedule for the battery 11. Here, the reserve power Wres for the total power consumption is set. The reserve power Wres can be set to a value corresponding to 5% or 10% of the capacity of the ampere breaker 23 in the home 2 as a default value, or it can be set to 0.

[0036] Then, the electric power Wchg of the charging plan is set so that the sum of the power forecast Whome of home 2, the electric power Wchg of the charging plan, and the reserve power Wres is less than the upper power limit Wlim at any time, as expressed by the following expression (1). Wilm(t) ≥ Whome(t) + Wres(t) + Wchg(t)

[0037] In expression (1), t represents any time in the schedule. The charging power is scheduled to satisfy the above expression (1) from time t1 when the charging schedule is created to time t2, thereby preventing the occurrence of a power outage due to the triggering of the ampere breaker 23 caused by the power consumption of the home 2 exceeding the contracted electric power (power consumption limit) during charging of the battery 11.

[0038] Furthermore, the electric power Wchg is electric power that can be used by the on-vehicle charger 12, but is not necessarily used only for charging the battery 11. For example, assume that in order to adjust the temperature inside the vehicle to an appropriate temperature by air conditioning before getting into the electric vehicle 1, the user operates an air conditioner of the electric vehicle 1 while the electric vehicle 1 receives the supply of electric power from the home 2 via the charging cable 27. Even in such a case, some measures should be taken to prevent the occurrence of a power outage in the home 2. Therefore, the electric power Wchg of the charging plan may include not only electric power for charging the battery but also electric power for air conditioning the electric vehicle 1.

[0039] As described above, the reserve power Wres is set to a value corresponding to 5% or 10% of the capacity of the ampere breaker 23 of the home 2 as a default value, but can be adjusted based on the weather conditions around the home detected by the external environment detection unit 120. For example, in a case where the raindrop sensor as the external environment detection unit 120 predicts that the possibility of rain is high, the reserve power Wres is corrected to increase it. As a result, it is possible to avoid a situation in which the ampere breaker 23 is operated to cause a power outage due to an increase in the power consumption of the home 2 because the user uses a device such as a washer-dryer or a dryer that is likely to be used when it rains.

[0040] On the other hand, if a large value, for example, a value exceeding 30% of the capacity of the ampere breaker 23, is set for the reserve power Wres, the electric power that can be used by the on-vehicle charger 12 decreases, so that the time for charging the battery 11 may be excessively long. Therefore, it is not preferable to set an excessively large value for the reserve power Wres.

[0041] Although the power consumption limit Wlim was described above as the capacity at which the ampere breaker 23 operates, the power consumption limit Wlim is not limited to this. For example, the user may use a preset power consumption limit to save on electricity prices. Furthermore, a target power value is set when a wholesale electric utility supplying electric power to the power system 21 performs demand response in response to a request to refrain from using electric power to stabilize a regional electric power supply. In such a case, the target power value may be set to the power consumption limit Wlim.The target power value is acquired, for example, by receiving information distribution from a wholesale electric utility that supplies electrical power of the power system 21.

[0042] Note that the charging schedule can also be created by the following method instead of the method described above. First, it is assumed that the power consumption prediction of home 2 by the power consumption estimation unit 111 and the upper limit (power consumption upper limit) of the electric power at which the ampere breaker 23 trips are obtained. Based on this assumption, a problem for maximizing a power margin (= "power consumption upper limit" - {"power consumption prediction of home 2" + "charging power of battery 11"}) and a charging power level is formulated as the following equation (2) and optimized as a linear programming problem, whereby a charging schedule that can reduce the charging time while avoiding a power outage can be obtained.In expression (2), the first term on the right is the power margin, the second term is the charging power level, k is the time, and T is the length of a time period after the time t at which the plan is created. The parameters α and β, which represent weighting factors, are used to set which of the size of the margin and the charging power level should be prioritized. P. Limit in the first term is the upper limit of the electrical power, and W with tilde (~) is power consumption forecast of home 2. b j v in the second term, the charging power of battery 11 is used. N is the number of vehicles corresponding to the electric vehicle 1 to be charged in home 2, and j is a number corresponding to each vehicle. [Mathematical Formula 1] Z=α∑k=tt+TPLimit(k)−W˜(k|t)+β∑k=tt+T∑j=1Nbjv(k|t)

[0043] Fig. Figure 6 is a diagram illustrating an example of a charging plan in a case where a charging contract applies in which the electricity price of Home 2 fluctuates according to a period of time. In Fig. 6, a thin dashed line shows the power consumption upper limit, a thin solid line shows a power consumption prediction of the home 2, a thick solid line shows a charging plan for the battery 11, and a thick dashed line shows the power consumption prediction calculated by adding the power consumption prediction of the home 2 and the power consumption in the charging plan as shown in Fig. 5. During the period indicated by an arrow, a night-time charging plan offering lower electricity prices is applied.

[0044] In a case where the electricity price of home 2 fluctuates according to a period of time, as in Fig. As shown in Figure 6, the charging power determination unit 112 can create a plan to reduce the electricity price for electric power used for charging. Such information regarding the electricity price can be input by the user via the information acquisition unit 130 or can be provided by a wholesale electricity company through a method for sequentially distributing the information to the information acquisition unit 130. The charging power determination unit 112 creates a charging plan such that the amount of charging power increases during the period to which the night charging plan is applied. Fig. 6, the loading plan is generated so that the area of ​​an area surrounded by the horizontal axis and the thick solid line specified as the loading plan increases.

[0045] Fig. Fig. 7 is a flowchart illustrating a series of processes performed by the above-described on-vehicle charging system 10, and the processes are executed by the integrated controller 110. Note that the processing of the Fig. The flowchart shown in Figure 7 is started, for example, when the user moves the gear lever of the electric vehicle 1 into the park position or turns off the ignition. Alternatively, the processing can be initiated by a start command from the user.

[0046] In step S201, the integrated controller 110 determines whether the contracted power and the household appliance information required to estimate the power consumption of the home 2 have been acquired by the information acquisition unit 130. If it is determined in step S201 that the information has not been acquired (No), the processing proceeds to step S202 to execute a subroutine for acquiring the information and then proceeds to step S203. The detailed process of step S202 will be described later. On the other hand, if it is determined in step S201 that the information has been acquired (Yes), the processing proceeds to step S203.Note that in a case where a power failure occurs at the time of the previous charging, it is conceivable that a new household appliance has been added to the home 2, and therefore, in step S201, it is possible to ask the user whether there is an update to the household appliance information.

[0047] In step S203, the integrated controller 110 reads the home appliance information that has already been acquired or will be acquired in step S202. In step S204, the integrated controller 110 reads the external environment information detected by the external environment detection unit 120. In step S205, the power consumption estimation unit 111 of the integrated controller 110 estimates a power consumption prediction of the home 2 based on the read home appliance information and the external environment information. In step S206, the charging power determination unit 112 of the integrated controller 110 creates a charging plan for the battery 11 based on the power consumption prediction of the home 2 and the power consumption upper limit of the home 2 obtained in step S205.

[0048] Note that the power consumption forecast and charging schedule can be displayed on a display included in the human-machine interface. The user can check charging information while sitting in the driver's seat before leaving the electric vehicle 1.

[0049] In step S207, the integrated controller 110 checks the connection state of the charging cable 27 based on information from the control box included in the charging cable 27 and determines whether the battery 11 can be charged or not. If the charging cable 27 is not connected, the processing returns to step S204. If charging is possible, the processing proceeds to step S208, where a self-test of the charging system related to charging is performed. For example, a temperature, a voltage, and the like of the battery 11 are detected, and it is confirmed whether the battery 11 can be charged or not. In step S209, it is determined whether the charging system has passed the self-test (whether charging is possible or not).If it is determined in step S209 that the charging system has passed, processing proceeds to step S210, where the battery 11 is charged according to the charging schedule created in step S206. On the other hand, if it is determined in step S209 that the charging system has failed the self-test, processing proceeds to step S211 to execute error processing such as an error message.

[0050] When the detection value of the acceleration sensor, which is one of the elements included in the external environment detection unit 120, becomes equal to or greater than a predetermined acceleration while the battery 11 is being charged by the on-vehicle charger 12, charging is stopped. If the acceleration sensor detects a periodic acceleration of a predetermined value or more, it is assumed that an earthquake may have occurred. Furthermore, in a case where the acceleration reaches a predetermined value or more regardless of the periodicity, there is a possibility that something has collided with the electric vehicle 1. By automatically stopping charging when such an acceleration is detected during battery charging, the occurrence of a secondary disaster such as a fire can be prevented.

[0051] Note that the seismic intensity reference can be changed by the user. For example, charging will be temporarily paused if an earthquake of magnitude 5 or less is detected. Charging will resume when acceleration is no longer detected and it is determined that power supply through charging cable 27 continues after charging was automatically paused.

[0052] Fig. 8 is a flowchart showing the detailed processing of an information acquisition process of the Fig. 7. Note that the household appliance in the household appliance information is not limited to a common household appliance, as long as it consumes electric power in the home 2 and consumes electric power measured by the electric power meter 22.

[0053] In step S301, the information acquisition unit 130 acquires the capacity contracted with the electricity company, which represents the upper limit of the power capacity of the home 2. In step S302, the room layout and structure of the home 2, information indicating whether the home 2 is a single-family home or a multi-family home, and information about the hot water supply and heating equipment are acquired. In step S303, household appliance information of the home 2 is acquired. In step S304, the integrated controller 110 checks the content of the information acquired by the information acquisition unit 130. Then, if there is information that needs to be changed (in the case of no), the processing proceeds to step S305 to re-acquire correct information.

[0054] As described above, in the first embodiment, the power consumption of the home 2 is estimated based on the information acquired by the external environment detection unit 120 and the information acquisition unit 130 mounted in the electric vehicle 1, and a charging schedule for the battery 11 is determined based on the estimated power consumption estimate (power consumption prediction). Therefore, it is possible to estimate an amount of electric power consumed by the home 2 and generate a charging schedule using the electric vehicle 1 alone, without requiring a device for estimating the amount of power consumption and generating the charging schedule in the home 2. As a result, optimal charging can be performed while avoiding the risk of the breaker of the home 2 being triggered. (Second embodiment)

[0055] Fig. Fig. 9 is a block diagram for describing a second embodiment of the present invention and illustrates facility configurations of an electric vehicle 1 and a home 2 as shown in Fig. 1. A Fig. The vehicle charging system 10 shown in Figure 9 contains, in addition to the Fig. 1, an information presentation unit 140 and a plan modification unit 150. <Informationspräsentationseinheit 140>

[0056] The information presentation unit 140 presents the user with the Fig. 4 shown power consumption forecast of home 2, the one in Fig. 5, and the like. Furthermore, the information presentation unit 140 displays a situation of power failure risk when charging is performed according to the charging plan, thereby warning the user. For example, the information presentation unit 140 presents the time t2 in Fig. 5 as the scheduled time at which the charging of the battery 11 is completed. In addition, the information presentation unit 140 displays, as shown in Fig. 5, information indicating that there is a high risk that the ampere breaker 23 of home 2 will be tripped around 12:00 and 18:00.

[0057] The user can correct the value of the reserve power Wres to be reduced by the plan modification unit 150 and can correct the power consumption forecast of the household appliance by refraining from using electric cooking appliances such as an IH heater during the above-described period. With such a correction, it is possible to correct the charging power limit to be increased when charging the battery 11. As a result, a plan for further shortening the charging time of the battery 11 can be created, and the battery 11 can be charged while preventing the power outage of the home 2. The power consumption forecast and the charging plan are presented to the user by the information presentation unit 140 as described above, making it possible to prompt the user to shorten the charging time while avoiding a power outage.

[0058] Note that the plan modification unit 150 may be configured as a human-machine interface having a corresponding function like the information presentation unit 140, etc., or may be configured on a server like the information acquisition unit 130 described above.

[0059] Fig. 10 is a flowchart for describing an operation of the on-vehicle charging system 10 according to the second embodiment. Fig. 10 has been modified to reflect the flow chart shown in Fig. 7, step S220 is added, and the processing proceeds to step S220 if it is determined in step S207 that no cable is connected. The processes of the other steps are similar to those described with reference to Fig. 7, so the loading plan modifying processing of the added step S220 will be described below.

[0060] Fig. 11 is a flowchart illustrating an example of the details of the charging plan modification processing of step S220. A series of charging plan modification processing is executed by the plan modification unit 150. In step S401, a power consumption forecast and a charging plan are displayed on the information presentation unit 140.

[0061] The Fig. 12 and Fig. 13 illustrates display examples of a power consumption prediction (A) of home 2 and a charging power (B) based on the charging schedule in the information presentation unit 140. The widths of areas A and B in the vertical direction in the drawings represent the charging power Wchg and the power consumption Whome of home 2, respectively. Information about the power failure risk is displayed above the charging power (B). Furthermore, notes related to the charging schedule are displayed above the power failure risk information as modification suggestion information.

[0062] Fig. Figure 12 shows a case where the automatic adjustment of the charging power is stopped and the charging power Wchg is set to a constant value from the start time t1 to the end time t2. Therefore, an area C in which area A and area B overlap is generated in a period from 10:00 to 11:00 and a period from 11:30 to 12:30. The power failure risk is represented by a color indicator. Specifically, a green color indicates a safety level, a yellow color indicates a warning level, and a red color indicates a high level of power failure risk. Fig. In the example shown in Figure 12, the risk of performance failure is shown in red between 10:00 and 13:00.

[0063] Fig. Figure 13 shows a case where the charging of the battery 11 is stopped during a period in which the risk of power failure is high. Fig. 12 the charging start time t1 is 10:00, but in Fig. 13, the start time t1 is set to 13:00. Therefore, the overlap of area A and area B is eliminated, but the charged power amount (remaining charge amount) of the battery 11 at the end time t2 is less than that in the case of Fig. 12.

[0064] The user considers reviewing the charging plan by referring to the power consumption forecast, charging plan, power failure risk information, and modification suggestion information displayed on the information presentation unit 140. The user then operates the input unit of the information acquisition unit 130 to input an instruction to modify or not modify the charging plan. For example, the user requests the charging plan to be modified according to their preferences, to end charging earlier, or to reduce power consumption.

[0065] Returning to Fig. 11, it is determined in step S402 whether or not a modification request has been issued by the user. If the modification request has been issued, processing proceeds to step S403, and if the modification request has not been issued, processing proceeds to step S407. If processing proceeds to step S407 without the modification request, the charging schedule is determined.

[0066] On the other hand, when processing proceeds to step S403 due to the modification request being issued, the details of the modification are acquired from the user. Specifically, a modification screen is displayed on the information presentation unit 140, and the user is allowed to input the details of the modification. The user modifies the charging end time, the reserve power Wres, the power consumption of the household appliance, the charging power limit when charging the battery 11, and the like. Note that in a case where it is considered difficult for the user to sequentially and accurately acquire the power consumption of the household appliance, the power consumption prediction of the home 2 can be modified by selecting whether to use the household appliance included in the power consumption prediction.

[0067] In step S404, the plan modification unit 150 generates a modified charging plan based on the modification details in step S403. Note that the modified charging plan may be generated by the plan modification unit 150, or the modification details in step S403 may be sent to the integrated controller 110, and the charging power determination unit 112 may generate the modified charging plan.

[0068] In step S405, the plan modification unit 150 checks whether the content of the modified charging plan generated in step S404 has failed. Specifically, the plan modification unit 150 determines whether the plan includes a time at which the power consumption upper limit Wlim(t), the power consumption Whome(t) of the home 2, the power used by the on-vehicle charger 12 Wchg(t), and the surplus power Wres(t) satisfy the relationship indicated by the following expression (3). Wlim(t) < Whome(t) + Wchg(t) + Wres(t)

[0069] If it is determined in step S405 that the plan has failed, processing returns to step S403 to display a modification screen prompting modification on the information presentation unit 140. The processes from step S403 to step S405 are repeated until a plan without failure is created. Note that each time the modification is input in step S403, the modified charging plan and power consumption prediction are displayed on the information presentation unit 140. Thus, the user can interactively modify the charging plan, allowing the user to easily grasp the power consumption prediction and the charging plan.

[0070] On the other hand, if it is determined in step S405 that the charging plan has not failed, processing proceeds to step S406 to display the modified charging plan on the information presentation unit 140 and provide the user with advice or the like regarding the modified charging plan. Examples of advice include information for further reducing the possibility of a power failure.Specific examples of the advice include indicating a household appliance that should not be used during a period when the power consumption of the home 2 is high, issuing a notice indicating that the charging end time will be extended when the modified charging plan is applied to reduce the upper limit of the charging power, and issuing a notice indicating a prediction of the state of charge of the battery 11 at the time the electric vehicle 1 should be started for use the next day.

[0071] When the process of step S406 is completed, the processing proceeds to step S407 to determine the charging plan.

[0072] In the second embodiment described above, the power consumption prediction, charging schedule, power failure risk information, and the like of the home 2 are presented to the information presentation unit 140, allowing the user to grasp the details of the charging schedule and the like. As a result, the user can grasp a risk of power failure and a factor that leads to a situation where the charging output does not reach the rated power, and thus the user can consider reviewing the charging schedule and the like. Furthermore, a schedule modification unit 150 is provided for modifying the charging schedule, allowing the user to adjust the charging power so that the charging time can be further shortened while avoiding power failure.At this time, the charging information including the modified charging plan is presented to the information presentation unit 140, whereby it is possible to adjust the charging power efficiently and effectively. (Third embodiment)

[0073] Fig. 14 is a block diagram for describing a third embodiment of the present invention. Fig. The configuration shown in Figure 14 contains, in addition to the Fig. 1, the configuration of the first embodiment includes an energy management system 32 in a home 2 and a telematics unit 160 in an on-vehicle charging system 10. The energy management system 32 includes a solar panel 33, a power conditioner 34, a smart meter 35, an Internet of Things (IOT) household appliance 36, and a HEMS controller 37.

[0074] The power conditioner 34 has a function of using the power generated by the solar panel 33 in the home 2 or selling the power to the power system 21. The smart meter 35 measures the power fed into and output from the power system 21. The power consumption adjustment and power activation of the IOT household appliance 36 can be controlled by the smart meter 35 and the energy management system 32. The HEMS controller 37 controls the power conditioner 34 and the IOT household appliance 36 by aggregating a power trading result by the smart meter 35 and the operating result of the IOT household appliance 36.

[0075] Furthermore, the HEMS controller 37 is configured to communicate with an aggregation server 39 via an internet network 38. The aggregation server 39 maintains a power consumption result and power trading information of the home 2 obtained via the HEMS controller 37 and performs statistical processing. The user can confirm these pieces of information maintained by the aggregation server 39 from any terminal (not shown). The on-vehicle charging system 10 references the power consumption result of the home 2 via the telematics unit 160 and the internet network 38 and sends a detection result of the external environment detection unit 120 to the aggregation server 39.The aggregation server 39 links the detection result (air temperature, illuminance, humidity, etc.) from the external environment detection unit 120 with the power consumption result of the home 2 and retains the result as power consumption result information. The on-vehicle charging system 10 can acquire the power consumption result information from the aggregation server 39 using the telematics unit 160 provided in the on-vehicle charging system 10.

[0076] When estimating the power consumption of the home 2, the power consumption result information is read from the aggregation server 39 under conditions similar to the air temperature, illuminance, and humidity detected by the external environment detection unit 120. Then, a power consumption prediction for the home 2 is generated using the operation pattern of the household appliance included in the read power consumption result information. As described above, the past power consumption result in the home 2 is taken into account when estimating the power consumption, thereby improving the accuracy of the power consumption estimation. As a result, the charging schedule scheduling system is improved, and it is possible to prevent a power outage in the home 2 when charging the battery.In addition, the accuracy of power consumption estimation increases, which can further reduce the excess power Wres in the charging plan and prevent the charging time from becoming excessively long.

[0077] Furthermore, in a case where the power consumption of the home 2 exceeds a value estimated by the power consumption estimation unit 111 during charging according to the charging schedule, the charger controller 13 can be instructed to reduce the output of the on-board charger 12 to prevent a power outage. In a situation where the weather changes after charging begins and heating is stopped contrary to expectations, the actual power consumption becomes smaller than the estimated power consumption. Therefore, the output of the on-board charger 12 can be increased to shorten the charging time. (First modification)

[0078] Fig. Fig. 15 is a flowchart for describing a first modification. In the first modification, the external environment detection unit 120 includes a GPS device and acquires position information about the position of the electric vehicle 1. The integrated controller 110 executes the Fig. 15 before it carries out the processing described in Fig. 7 starts based on the detected position information. The integrated controller 110 starts the Fig. 15, for example, when the user puts the gear lever of the electric vehicle 1 into park or turns off the ignition, or in response to an operation performed by the user to start the vehicle after the vehicle has stopped.

[0079] In step S501, the integrated controller 110 causes the external environment detection unit 120 to acquire position information about the position of the electric vehicle 1 from the GPS. In step S502, whether the battery 11 in the home 2 is being charged is determined based on the acquired position information. For example, if the acquired position information is within a predetermined range including the home 2, it is determined that the battery 11 in the home 2 is being charged. If the acquired position information is outside the predetermined range, it is determined that the battery 11 in the home 2 is not being charged.

[0080] If it is determined in step S502 that the battery 11 in the home 2 is being charged, the processing proceeds to step S503 to execute the above-described Fig. 7, that is, to perform the charging of the battery 11 accompanied by the creation of a charging schedule. On the other hand, when the processing proceeds to step S504 based on the determination in step S502 that the battery 11 is not being charged in the home 2, charging is performed with the smaller of the power specified by a control box included in the charging cable 27 and the power specified by the temperature of the battery 11. When the processing proceeds to step S504, the estimation of the power consumption of the home 2 by the power consumption estimation unit 111 and the creation of the charging schedule by the charging power determination unit 112 are not performed.

[0081] Meanwhile, the charging schedule determined by the charging power determination unit 112 is planned based on the power consumption prediction of the location (home 2) where the user normally performs charging, and thus the charging schedule is inappropriate at a charging location other than home 2. However, by using the position information acquired by the external environment recognition unit 120 as described above, it is possible to determine whether or not the user starts charging at a location (home or the like) where the user normally performs charging. Then, the process as in step S503 or step S504 is performed according to the position of the electric vehicle 1, whereby it is possible to perform appropriate charging according to the position of the electric vehicle 1.

[0082] Furthermore, if the position information does not indicate the position of Home 2, the processing proceeds from step S502 to step S504, so that the charging plan based on the power consumption estimate of Home 2 is not created. Therefore, when charging (using a charger or power) is performed at a location other than Home 2, it is possible to prohibit charging based on an inappropriate charging plan (charging plan for performing charging in Home 2).

[0083] In the above description, the Fig. 15 is started, for example, when the user puts the gear lever of the electric vehicle 1 into park or turns off the ignition, or in response to an operation performed by the user to start the vehicle after the vehicle has stopped. However, the following process may be performed. First, when the electric vehicle 1 approaches the home 2 and the position information acquired by the GPS device falls within the predetermined area, the processing of Fig. 7. Then the integrated controller 110 starts the Fig. 15, for example, when the user sets the gear lever of the electric vehicle 1 to park or turns off the ignition, or in response to an operation performed by the user to start the vehicle after the vehicle has stopped. In this case, in step S503 in Fig. 15, a charging process is carried out accompanied by the presentation of a charging plan or the like. As a result, the charging plan is presented, and the charging setup can be completed immediately when the electric vehicle 1 arrives at the home 2. Of course, the charging plan can be presented before the electric vehicle 1 arrives at the home, allowing the user to know the charging plan in advance after arrival.

[0084] The case where the first modification is applied to the first embodiment has been described above, but the first modification can be similarly applied to the second and third embodiments. (Second modification)

[0085] Fig. 16 is a diagram for describing a second modification and a functional block diagram of the integrated controller 110. The Fig. The integrated controller 110 shown in Figure 16 contains, in addition to the power consumption estimation unit 111 and the charging power determination unit 112 shown in Fig. 2, a charging possibility determination unit 113 and a charging method determination unit 114. The operations of the power consumption estimation unit 111 and the charging power determination unit 112 are similar to those in the case of Fig. 2.

[0086] The charging possibility determination unit 113 detects the charging state of the battery 11 when charging is performed from the battery sensor 14 and stores the charging state of the battery 11 at the start of the previous charging or the charging state of the battery 11 at the start of charging in a plurality of past charging processes up to the previous charging.

[0087] The charging possibility determination unit 113 makes the following determination regarding the state of charge of the battery 11. The charging possibility determination unit 113 determines that the charging possibility is high in a case where the current state of charge of the battery 11 is lower than the state of charge of the battery at the time of past charging stored in the charging possibility determination unit 113, or lower than the state of charge obtained by adding 5 to 10% of the amount of power at the time of full charge to the state of charge of the battery at the time of past charging. When the above determination is made while the electric vehicle 1 is traveling, a "predicted value of the state of charge of the battery 11 when the electric vehicle 1 arrives at the home 2" is used instead of the "current state of charge of the battery 11."

[0088] In a case where the charging possibility determination unit 113 determines that the charging possibility is high and the period during which the power consumption of the home 2 estimated by the power consumption estimation unit 111 is high is expected to continue for a long time, the charging method determination unit 114 presents information prompting the user to charge at a location other than the home 2, for example, through the information presentation unit 140 or the like. Here, the state in which the period during which the power consumption of the home 2 is high continues for a long time refers to a case where, when the battery 11 is charged according to the charging schedule (output) of the on-vehicle charger 12 determined by the charging power determination unit 112, more than twice the charging time is required compared to the case of charging with the rating of the on-vehicle charger 12.

[0089] Please note that the value "twice or more" can be adjusted according to user preference. The charging time can be 1.5 times or more for a user who does not want to increase the charging time, and it can be four times or more for a user who wants to charge at home. As described above, the numerical value "two" in the phrase "twice or more" is adjustable, and it is preferable that the numerical value be adjustable in the range of 1 to 5.

[0090] As described above, in the second modification, in a case where the power consumption in the home 2 is high, information prompting the user to charge at a charging location other than the home is presented to the user to avoid charging in the home 2. As a result, it is possible to prevent a power outage in the home 2 or an excessively long charging time of the battery 11. (Third modification)

[0091] In the third modification, a setting state of a vehicle air conditioner mounted on the electric vehicle 1 is also used when the power consumption estimation unit 111 generates a power consumption prediction of the home 2. The temperature setting of the vehicle air conditioner when the user is in the electric vehicle 1 depends on the outside temperature at that time, but is also affected by how the user feels about the temperature.

[0092] For example, in a case where the user is sensitive to cold, the temperature setting tends to be higher than that set by a person who is not sensitive to cold. Therefore, when the user returns to Home 2, the temperature of an air conditioner in Home 2 is likely to be higher. In view of this, the power consumption estimation unit 111 estimates the temperature setting of the air conditioner in Home 2 based on the temperature setting of the vehicle air conditioner and generates the power consumption prediction of Home 2.

[0093] This scheme is applied as follows. For example, a reference is set for the set temperature of the vehicle air conditioner of electric vehicle 1. If the temperature setting of the vehicle air conditioner exceeds the range of 23 to 28°C, the air conditioner power consumption is corrected during the power consumption estimation of home 2. If the temperature setting is lower than 23°C, the air conditioner power consumption is increased by 10% during cooling operation, and if a temperature above 28°C is set, the air conditioner power consumption is increased by 10% during heating operation. Under such conditions, the power consumption prediction of home 2 is calculated.A height to be corrected may be increased by a predetermined amount if the setpoint exceeds a predetermined range, as described above, or an amount of power corresponding to the deviation from the reference temperature may be increased or decreased.

[0094] As described above, in the third modification, the preferences and characteristics of the user driving the electric vehicle 1 are taken into account when estimating the power consumption of the home 2, thereby improving the accuracy of estimating a power consumption estimate. Furthermore, since the accuracy of estimating the power consumption estimate is improved, it is possible to more strictly set the excess power Wres in the charging plan, thereby preventing the charging time from being excessively extended.

[0095] According to the above-described embodiments and modifications of the present invention, the following operational effects are achieved.

[0096] (C1) As in the Fig. 1 and Fig. 2, an on-vehicle charging system 10 that charges a battery 11 mounted in an electric vehicle 1 with electric power supplied from a home 2 includes: an external environment detection unit 120 that is mounted on the electric vehicle 1 and detects external environment information regarding an external environment around the electric vehicle 1; an information acquisition unit 130 that acquires facility information about an electrical device (information about an electrical load 25 present in the home 2); a power consumption estimation unit 111 that calculates a power consumption estimate (power consumption prediction) of the electrical device present in the home 2 when charging the battery based on the external environment information and the facility information;and a charging power determination unit 112 that determines a charging schedule for the battery 11 based on the estimated power consumption. The charging power determination unit 112 determines the charging schedule such that the sum of the charging power of the battery 11 and the estimated power consumption falls below an upper limit of the electric power (the value of electric power at which an ampere breaker 23 trips) that can be consumed in the home 2.

[0097] As described above, the power consumption of the home 2 is estimated and the charging plan for the battery 11 is generated based on the information acquired by the external environment detection unit 120 and the information acquisition unit 130 provided in the on-vehicle charging system 10, whereby it is possible to generate the charging plan by the electric vehicle 1 only at the time of charging in the home 2.

[0098] (C2) In the above-described (C1), the on-vehicle charging system 10 further includes an information presentation unit 140 that presents charging information including the charging plan and the power consumption estimate, as shown in Fig. 1. Since the estimated power consumption and the charging schedule are presented to the user by the information presentation unit 140, the user can grasp the estimated power consumption and the charging schedule. Furthermore, the charging information is presented so that the user can confirm that charging is in progress, thereby avoiding the risk of tripping the ampere breaker 23 of the home 2. Thus, it is possible to reduce the user's psychological burden regarding the risk of power failure.

[0099] (C3) In the above-described (C2), the charging power determination unit 112 generates, in addition to determining the charging plan, as shown in the Fig. 9, Fig. 12 and Fig. 13, power shortage risk information (power failure risk information) in Home 2 based on the charging plan. The charging information also includes the power shortage risk information. As shown in the Fig. 12 and Fig. As shown in Figure 13, the information presentation unit 140 presents the power failure risk information to the user in addition to the charging plan (charging power) and the power consumption estimate (power consumption prediction), allowing the user to understand the power failure risk, the factor causing a situation where the charging output does not reach the rated capacity, and the like. As a result, it is easy to adjust the charging power while avoiding power failure.

[0100] (C4) In the above-described (C2), the on-vehicle charging system 10 further includes a plan modification unit 150 for modifying the charging plan determined by the charging power determination unit 112, as shown in Fig. 9, wherein the information presentation unit 140 presents charging information including a charging plan modified by the plan modification unit 150 instead of the charging plan and the power consumption estimate when the plan modification unit 150 performs the modification.

[0101] The plan modification unit 150 for modifying the charging plan is provided, allowing the user to adjust the charging power to further shorten the charging time while avoiding power outages. Furthermore, the charging information including the modified charging plan is presented to the information presentation unit 140, making it possible to adjust the charging power efficiently and effectively.

[0102] (C5) In the above-described (C4), the charging information presented by the information presentation unit 140 further includes modification suggestion information for the charging plan or the modified charging plan as shown in the Fig. 12, Fig. 13, etc. By presenting the modification suggestion information as described above, the user can easily adjust the charging power or the like by referring to the modification suggestion information.

[0103] (C6) In the above-described (C1), the on-vehicle charging system 10 further includes a record information acquisition unit (telematics unit 160) that acquires information about a record of the use of the electrical device in the home 2 as shown in the Fig. 14, etc., in which the power consumption estimation unit 111 calculates the power consumption estimation value based on the external environment information, the facility information, and the information acquired by the recording information acquisition unit (telematics unit 160).

[0104] The information about the usage record of the electrical device in the home 2 is acquired by the telematics unit 160 as described above, and the power consumption estimate can be corrected with reference to the usage record. As a result, the accuracy of the power consumption estimation can be improved, thereby improving the accuracy of the charging plan and reducing the occurrence of a power outage in the home 2 at the time of battery charging. Furthermore, the accuracy of the estimation of the power consumption estimate increases, whereby the excess power Wres in the charging plan can be reduced to increase the upper limit of the charging power and prevent the charging time from becoming excessively long.

[0105] (C7) In the above-described (C1), the power consumption estimation unit 111 may estimate the power consumption based on the information about the external environment, the facility information about the electric power of the electrical device (household appliance) provided in the home 2, and the setting information (e.g., temperature setting) about the setting of a vehicle air conditioner provided in the electric vehicle 1 as shown in Fig. 1, etc. That is, the estimation accuracy of the power consumption estimation value can be improved by assuming that the air conditioner in the home 2 is used in the same way as the vehicle air conditioner. Furthermore, since the estimation accuracy of the power consumption estimation value is improved, it is possible to more strictly set the excess power Wres in the charging plan, and thus it is possible to prevent the charging time from being excessively prolonged.

[0106] (C8) In the above-described (C1), the external environment detection unit 120 includes an acceleration sensor as shown in Fig. 1, etc., and charging of the battery 11 is stopped when an acceleration detected by the acceleration sensor is equal to or greater than a predetermined value. As described above, in a case where an acceleration equal to or greater than the predetermined value is detected by the acceleration sensor, there is a possibility that an earthquake has occurred or something has collided with the electric vehicle 1. By automatically stopping charging when the acceleration detected during battery charging is equal to or greater than the predetermined value, the occurrence of a secondary disaster such as a fire can be prevented.

[0107] (C9) In the above-described (C1), the external environment detection unit 120 includes a position information sensor (e.g., a GPS device) that acquires position information about a position of the electric vehicle 1, and when the external environment detection unit 120 detects that a stop position of the electric vehicle 1 is within a predetermined range including the home 2, the calculation of the power consumption estimation value by the power consumption estimation unit 111 and the determination of the charging plan by the charging power determination unit 112 are performed as shown in Fig. 15 etc.

[0108] The charging plan determined by the charging power determination unit 112 is planned based on the power consumption prediction of the location (home 2) where the user usually performs charging, and thus the charging plan is inappropriate at a charging location other than home 2. However, the calculation of the power consumption estimation and the determination of the charging plan are executed when the stop position of the electric vehicle 1 is within the predetermined area including home 2 as described above, thereby making it possible to prevent charging with an inappropriate charging plan (charging plan for charging at home 2) when charging is performed at a location (charger or power) other than home 2.

[0109] (C10) In the above-described (C2), the external environment detection unit 120 includes a position information sensor that detects position information about a position of the electric vehicle 1, and when the external environment detection unit 120 detects that the position of the electric vehicle 1 is within a predetermined range including the home, the calculation of the power consumption estimation value by the power consumption estimation unit 111 and the determination of the charging plan by the charging power determination unit 112 are carried out as shown in Fig. 15, etc. Then, the information presentation unit 140 presents the charging information including the charging schedule and the power consumption estimate when or before the electric vehicle 1 arrives at the home 2.

[0110] The charging plan and the estimated power consumption are presented when or before the electric vehicle 1 arrives at the home 2, making it possible to complete the charging setup when the electric vehicle 1 arrives at the home 2. In a case where the charging plan is presented before arrival, the user can know the charging plan after arrival in advance.

[0111] (C11) In the above-described (C2), the on-vehicle charging system 10 further includes a charging possibility determination unit 113 that determines a possibility of performing charging in the home 2 based on a remaining charge amount of the battery 11, wherein the information presentation unit 140 presents information suggesting charging at a location other than the home 2 when the charging possibility determination unit 113 determines that the possibility of charging in the home 2 is high and the power consumption estimation value calculated by the power consumption estimation unit 111 is equal to or greater than a predetermined value, as shown in Fig. 16 etc.

[0112] As described above, in a case where the estimated power consumption of the home 2 is equal to or greater than the predetermined value, suggestion information prompting charging at a charging location other than the home is presented to the user, thereby avoiding charging at the home 2. As a result, it is possible to prevent a power outage in the home 2 or an excessively long charging time for the battery 11. Furthermore, in a case where the position of the electric vehicle 1 is within a predetermined area including the home 2, according to, for example, the position information from the GPS device, the suggestion information can be presented to the information presentation unit 140 before the electric vehicle 1 arrives at the home 2. By presenting the suggestion information in advance in this way, the user can easily adopt an alternative charging method.

[0113] The above-described embodiments and modifications are merely examples, and the present invention is not limited by their contents as long as the features of the invention are not impaired. Although various embodiments and modifications have been described above, the present invention is not limited to their contents. Furthermore, the above-described embodiments and modifications can be combined. Other aspects conceivable within the scope of the technical idea of ​​the present invention are also included within the scope of the present invention. List of reference symbols 1 electric vehicle 2 Home 10 vehicle-mounted charging system 11 Battery 12 vehicle charger 14 Battery sensor 21 Performance system 23 amp breaker 25 electrical load 27 charging cables 32 Energy management system 110 integrated controller 111 Power consumption estimation unit 112 Charging power determination unit 113 Charging option determination unit 114 Charging method determination unit 120 External environment detection unit 130 Information acquisition unit 140 Information presentation unit 150 Plan Modification Unit 160 Telematics Unit QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 5168891 B2

[0004] Cited non-patent literature

[0000] Tsuyoshi Ueno, Hiroyuki Kitahara, Development of a Heat Source Characteristic Model for Room Air Conditioners, Report of the Central Research Institute of Electric Power Industry, General Report, R09 (2015), https: / / criepi.denken.or.jp / hokokusho / pb / reportDetail?repor tNoUkCode=R09

[0027] National Research and Development Institute; Technical Information on the Evaluation of Energy Consumption Performance According to the 2016 Energy Saving Standards (Houses), https: / / www.kenken.go.jp / becc / documents / house / 4-3_210401_v07.pdf

[0027]

Claims

[1] An on-board charger that charges a battery mounted in an electric vehicle with electrical power supplied from a home, the on-board charger comprising: an external environment detection unit mounted on the electric vehicle and detecting external environment information relating to an external environment around the electric vehicle; an information acquisition unit that acquires facility information about an electrical facility present in the home; a power consumption estimation unit that calculates a power consumption estimate of the electrical equipment in the home when charging the battery based on the external environment information and the equipment information; and a charging power determination unit that determines a charging plan for the battery based on the power consumption estimate, wherein the charging power determination unit determines the charging plan in such a way that a sum of the charging power of the battery and the power consumption estimate falls below an upper limit of the electrical power that can be consumed in the home. [2] The on-vehicle charging system according to claim 1, further comprising an information presentation unit that presents charging information including the charging schedule and the power consumption estimate. [3] On-board charging system according to claim 2, wherein the charging power determination unit, in addition to determining the charging plan, generates power shortage risk information in the home based on the charging plan, and the charging information includes the performance deficiency risk information. [4] The on-board charging system according to claim 2, further comprising: a plan modification unit for modifying the charging plan determined by the charging power determination unit, wherein the information presentation unit presents charging information including a charging plan modified by the plan modification unit instead of the charging plan and the power consumption estimate when the plan modification unit performs a modification. [5] The on-vehicle charging system according to claim 4, wherein the charging information presented by the information presentation unit further includes modification suggestion information for the charging plan or the modified charging plan. [6] The on-board charging system according to claim 1, further comprising: a record information acquisition unit that acquires information about a record of the use of the electrical equipment in the home, wherein the power consumption estimation unit calculates the power consumption estimation value based on the external environment information, the facility information, and the information acquired by the recording information acquisition unit. [7] The on-vehicle charging system according to claim 1, wherein the power consumption estimation unit calculates the power consumption estimation value based on the external environment information, the facility information, and the setting information about the setting of an air conditioner mounted on the electric vehicle. [8] On-board charging system according to claim 1, wherein the unit for detecting the external environment contains an acceleration sensor, and battery charging is stopped when an acceleration detected by the acceleration sensor is equal to or greater than a specified value. [9] On-board charging system according to claim 1, wherein the external environment detection unit includes a position information sensor that detects position information about a position of the electric vehicle, and when the external environment detection unit detects that a stop position of the electric vehicle is within a predetermined range including the home, the calculation of the power consumption estimation value by the power consumption estimation unit and the determination of the charging plan by the charging power determination unit are executed. [10] On-board charging system according to claim 2, wherein the external environment detection unit includes a position information sensor that detects position information about a position of the electric vehicle, when the external environment detection unit detects that the position of the electric vehicle is within a predetermined area including the home, the power consumption estimation unit calculates the estimated power consumption and the charging plan is determined by the charging power determination unit, and the information presentation unit presents the charging information when or before the electric vehicle arrives at the home. [11] An on-board charging system according to claim 2, further comprising: a charging possibility determination unit that determines a possibility of performing charging in the home based on a remaining amount of charge of the battery, wherein the information presentation unit presents information suggesting charging at a location other than the home when the charging possibility determination unit determines that the possibility of charging at the home is high and the power consumption estimation value calculated by the power consumption estimation unit is equal to or greater than a predetermined value.

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