JP2011198005A - Power control system, control method thereof, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power control system that boils water using an electric water heater and charges an in-vehicle battery on the basis of time-based power rate information, while efficiently reduce the power rate using limited contract demand and an allowable power.SOLUTION: In the power control system, a first communication means transmits information about charging of the in-vehicle battery, and a second communication means receives the information, and a boiling time calculation means calculates the boiling start time on the basis of the information about charging. When the time read from a clock means matches the boiling start time, a control determination means starts boiling by a boiling means. When detecting that an electric vehicle enters a garage during boiling, the control determination means interrupts the boiling, and starts charging the in-vehicle battery by a power supply means, and restarts the boiling after the end of the charging.

Description

  The present invention is a system that controls the boiling of an electric water heater and the charging of an in-vehicle battery of an electric vehicle based on information on electricity charges according to time zones, and is efficient under limited contract power and allowable power. In addition, in order to reduce the electricity usage fee, or to give priority to convenience over the electricity fee, it relates to a power control system, a control method, and a program for controlling the heating of the electric water heater and charging of the in-vehicle battery. is there.

  If you make good use of the hourly rate system that is set to equalize power demand, the electricity usage fee will be cheaper. An example of the hourly rate system is from 23:00 to 7:00 It is about 9 yen per kW, about 23 yen from 17:00 to 23:00 and from 7 to 10 before and after that, and about 28 to 33 yen from 10:00 to 17:00. The cheapest electricity usage fee from 23:00 to 7:00 is about 1/3 of the electricity usage fee from 10:00 to 17:00. In the present specification, such information related to the power usage time zone and the power usage fee is referred to as hourly electricity bill information.

  Such electricity rate information by time zone varies depending on the time zone and season, but other than that, it may be a different time zone and different rates for each contracted home. The fee information may be a different time zone and a different fee for each type of electrical equipment.

  Hereinafter, as for the electricity rate information by time zone, as described in the above example, 23:00 to 7 o'clock will be described as a time zone with a low power usage fee.

  There is an electric water heater as a typical example of the electric equipment that operates according to the time when the electricity usage fee is cheap, and it is heated up and stored at a time when the electricity usage fee is cheap, and the electricity usage fee is high like the daytime. Although hot water is consumed during the time period, there is an increasing number of cases where all-electric housing is used for electricity without using any gas.

  Moreover, recently, there are signs that electric vehicles and electric motorcycles are becoming popular due to technological innovation and accelerated oil prices. In many cases, it is necessary to charge on-board batteries at home, and electricity usage fees It is certain that there will be more and more things to drive or want to drive during the cheaper time zone.

  On the other hand, even in a time zone where the power usage fee is cheap, there is a contract for the upper limit of power usage in the home, and if this contract power (upper limit power) is exceeded, the breaker may fall. For example, if you concentrate too much of the above household appliances at 23: 00-7pm, when the electricity usage fee is cheap, the breaker will fall in the middle of the night, hot water is not boiling when you wake up in the morning, and the electric car moves due to insufficient charging There is no tragedy such as no rice is cooked in the rice cooker that has been reserved.

  As a conventional invention, when using both the operation of electrical equipment and charging the vehicle battery, the power consumption of the charger is used so that the breaker does not fall beyond the contract power or allowable power considering the power consumption of the entire house. There are some which control so as to reduce (see, for example, Patent Document 1).

  Patent Document 1 describes an in-vehicle battery charging device that reduces a charging current to a home in-vehicle battery when a contract current is exceeded by using a microwave oven (see paragraphs 0015 and 0028 of Patent Document 1).

JP 2008-141924 A

  However, the conventional method uses a combination of an electric device that a user wants to use immediately, such as a microwave oven, and an electric device that can be rotated later, such as an in-vehicle battery charger, so the microwave oven is used with priority. This period can be solved by reducing the power used for charging the vehicle battery. The use time of cooking appliances as described above is relatively short (several minutes to no more than a few dozen minutes), so control that temporarily gives away the power used is a major side effect (for example, that hot water is not boiling) This is possible without the electric vehicle not moving due to insufficient charging. However, when an electric water heater that continues to use electricity for a long time and an electric vehicle that has entered the home, the electric water heater must be heated up so that it does not compete with each other for electricity. Therefore, it is necessary to prevent the charging of the on-vehicle battery from overlapping in time.

  Needless to say, it is most preferable to finish heating up the electric water heater and charging the on-vehicle battery during a time when the electricity usage fee is cheap. Precisely determining the time is not always easy, and ideally, charging the on-board battery should have the highest priority over other devices and should be completed as soon as possible after warehousing. .

  Furthermore, in the case of an electric vehicle, since the mileage of the day can change significantly, fluctuations in the in-vehicle battery level at the start of charging are also a major factor.

  Of course, there is almost no problem when the amount of remaining battery in the vehicle is large, but if the mileage is extremely long and the remaining amount of battery in the vehicle is very small, the charging time will be longer or it will be necessary to charge more current than usual. It is noteworthy that power control is becoming very difficult due to the addition of such fluid factors. Especially when I went home with an electric car and tried to charge the on-board battery, the electric water heater just started to boil, and even if I start charging the on-board battery after the boiling time is over, I start using the electric car the next morning There are situations where it is not possible to fully charge by the time, so it is necessary to inform the remaining amount of the in-vehicle battery in advance and advance the boiling start time of the electric water heater according to the remaining amount of the in-vehicle battery .

  In this way, in the invention of power control combined with a conventional short-time use electric device taking a microwave oven as an example, a combination of devices that use a large current for a long time such as an electric water heater and an electric vehicle is combined. Sometimes there are issues that cannot be solved.

  In order to solve the conventional problem, in the power control system of the present invention, the remaining amount of the in-vehicle battery is detected by detecting the in-vehicle battery, the charging plug for charging the in-vehicle battery, and the remaining amount of the in-vehicle battery. Charging information acquisition means for acquiring information related to charging according to the above, an electric vehicle equipped with a first communication means, a boiling means for boiling hot water, a clock means, and a remaining amount of the in-vehicle battery Control determination to calculate the time required for charging, calculate the boiling time, calculate the amount of boiling water, calculate the electricity bill, hold the electricity bill information by time zone, and perform control or judgment And an electric water heater comprising a power supply means for connecting the charging plug to charge the on-vehicle battery, and a second communication means. In the power control system in which the control determination unit controls charging of the in-vehicle battery and power supply to the boiling unit based on gold information, information on the charging is transmitted from the first communication unit. The boiling time calculation means calculates the boiling start time from the information related to the charge received by the second communication means, and the time read by the control determination means from the clock means is the boiling start time. At the time of starting, when the boiling means starts to boil, and when it is detected that the electric vehicle has been received by the power feeding during the boiling by the boiling means, the boiling is interrupted, from the power feeding means Charging to the in-vehicle battery was started, and after the charging to the in-vehicle battery was completed, the suspended boiling was resumed.

  The present invention notifies the electric water heater in advance of the remaining amount of the in-vehicle battery, raises the boiling start time of the electric water heater in accordance with the remaining amount of the in-vehicle battery, and further charges the in-vehicle battery for charging. Since priority is given, the required amount of hot water in the electric water heater is not boiling, or when trying to use an electric vehicle, the on-board battery is not fully charged and the electric vehicle does not move, or the electric vehicle reaches the destination It is an object of the present invention to provide a power control system that can avoid such a significant inconvenience that it cannot be performed.

The figure which shows an example of a structure of the power control system in Embodiment 1 of this invention. The figure which shows the flow of the whole process of the control determination means in Embodiment 1 of this invention. The figure which shows an example (when the electric vehicle comes in after starting boiling) of the process flow of the control determination means in Embodiment 1 of this invention The figure which shows an example (when it does not fit in the cheapest electric power band) of the flow of a process of the control determination means in Embodiment 1 of this invention The figure which shows an example (when traveling distance is short) of the charge information according to time slot | zone in Embodiment 1 of this invention, a boiling period, and the charging period to a vehicle-mounted battery. The figure which shows an example (when traveling distance is short) of the charge information according to time slot | zone in Embodiment 1 of this invention, a boiling period, and the charging period to a vehicle-mounted battery. The figure which shows an example (when travel distance is a little large) of the charge information according to time zone in Embodiment 1 of this invention, a boiling period, and the charging period to a vehicle-mounted battery. The figure which shows an example (when traveling distance is very much) of the charge information according to time slot | zone in Embodiment 1 of this invention, a boiling period, and the charging period to a vehicle-mounted battery. The figure which shows an example (when traveling distance is very much) of the charge information according to time slot | zone in Embodiment 1 of this invention, a boiling period, and the charging period to a vehicle-mounted battery.

  In the power control system, the first invention is an information relating to charging according to the remaining amount of the in-vehicle battery by detecting the in-vehicle battery, a charging plug for charging the in-vehicle battery, and the remaining amount of the in-vehicle battery. Required for charging according to the remaining amount of the in-vehicle battery, an electric vehicle equipped with charging information acquisition means for acquiring the first charging means, a boiling means for boiling hot water, a clock means, Control determining means for performing calculation or boiling time calculation, boiling water amount calculation and electricity bill calculation, and holding or controlling electricity bill information by time zone, and the charging plug And an electric water heater having a second communication means for charging the in-vehicle battery and connecting the vehicle-mounted battery, and In the power control system for controlling the charging to the in-vehicle battery and the power supply to the boiling unit, the determination unit transmits information on the charging from the first communication unit, and the second communication unit The boiling time calculation means calculates the boiling start time from the information related to the charging, and when the time read by the control determination means from the clock means becomes the boiling start time, When boiling is started by the boiling means, and it is detected that the electric vehicle is received by the power feeding while the boiling means is being heated, the boiling is interrupted and charging of the in-vehicle battery from the power feeding means is started. Then, after the charging of the in-vehicle battery is completed, the suspended boiling is resumed.

  In this way, the electric water heater is informed in advance of the remaining amount of the in-vehicle battery, the boiling start time of the electric water heater is increased according to the remaining amount of the in-vehicle battery, and priority is given to charging to the in-vehicle battery. So, the required amount of hot water in the electric water heater is not boiling, or when trying to use an electric vehicle, the on-board battery is insufficiently charged and the electric vehicle does not move, or the electric vehicle cannot reach the destination A power control system capable of avoiding significant inconvenience is provided.

  According to a second aspect of the invention, in the power control system of the first aspect of the invention, if the boiling start time does not fall within the time zone of the cheapest electric charge recorded in the electric charge information recording means, the control determining means When the determination is made, the control determination means calculates the amount of hot water that can be boiled only in the time zone of the cheapest electricity rate, and boiled up the amount of hot water that can be boiled only in the time zone of the cheapest electricity rate.

  As a result, the remaining amount of in-vehicle battery is informed to the electric water heater in advance, and charging to the in-vehicle battery is prioritized while adjusting the amount of hot water heated up by the electric water heater according to the remaining amount of in-vehicle battery. To provide a power control system that can avoid significant inconveniences such as when an electric vehicle is used, the in-vehicle battery is insufficiently charged and the electric vehicle does not move, or the electric vehicle cannot reach the destination. It is possible to efficiently reduce the power usage fee under limited contract power and allowable power.

  According to a third aspect of the present invention, in the power control system of the first aspect of the invention, if the boiling start time does not fall within the cheapest electric charge time zone recorded in the electric charge information recording means, the control determination means When it is determined, the heating is started in a time zone other than the time zone of the cheapest electricity rate recorded in the electricity rate information recording means.

  As a result, the remaining amount of the on-board battery is informed to the electric water heater in advance, the boiling start time of the electric water heater is raised according to the remaining amount of the on-board battery, and charging to the on-board battery is prioritized. The electric power control system that can avoid the inconvenience that the electric vehicle does not move because the electric vehicle is not fully charged when the electric vehicle is used or the electric vehicle cannot reach the destination. It is possible to prioritize convenience over electricity charges.

  According to a fourth aspect of the present invention, in particular, in the power control system according to any one of the first to third aspects, the electric water heater includes a display input unit, and the boiling start time is recorded in the electric rate information recording unit. Processing when the control determination means determines that the time does not fall within the cheapest electricity bill time period (the boiling start time is increased, or the amount of hot water to be heated is reduced to fall within the cheapest electricity bill time zone) Is displayed and input in advance by the display input means, and the instruction boiling start time is increased, or the amount of hot water to be heated is reduced and the operation is in accordance with the cheapest electricity bill time zone). I did it.

  As a result, the electric water heater is informed in advance of the remaining amount of the on-board battery, and depending on the remaining amount of the on-vehicle battery, the boiling start time of the electric water heater is increased or the amount of hot water to be heated is reduced Charges to the on-board battery are prioritized during the electricity bill time zone, so when you try to use an electric vehicle, the on-board battery is insufficiently charged, or the electric vehicle does not move, or the electric vehicle It provides a power control system that can avoid significant inconveniences such as the inability to reach the destination, and can efficiently reduce the power usage fee under limited contract power and allowable power, or conversely It is possible to prioritize convenience over the user, and it is possible to clearly reflect the user's intention regarding energy consumption.

  According to a fifth aspect of the invention, in the power control system according to any one of the first to fourth aspects of the invention, the boiling start time is not within a time zone of the cheapest electric charge recorded in the electric charge information recording means. If the control determination means determines, the control determination means is the amount of hot water that can be boiled only in the time zone of the lowest electricity rate and the electricity rate for that, and the amount of hot water that springs over the time zone of the cheapest electricity rate and therefore The electricity charge is displayed by the display input means.

  As a result, it can be referred to as a criterion for determining whether to prioritize the convenience over the electricity charge, or to reduce the power usage fee efficiently under limited contract power and allowable power. Users can be clearly aware of their intentions regarding energy consumption, which can be expected to contribute to energy conservation awareness.

  A sixth invention is a program that causes a computer to execute a control method of the power control system, particularly in the power control system of any one of the first to fifth inventions. As a result, the present invention can be distributed as a program via a storage medium or a communication medium, installed on a computer, and executed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a diagram showing an example of the configuration of the power control system according to the first embodiment of the present invention. Hereinafter, description will be made with reference to FIG.

  The electric vehicle 2 includes an in-vehicle battery 23 for operating a driving motor and in-vehicle electrical components, and charges the in-vehicle battery 23 from the power supply means 13 via a charging plug 24. The charging information detection means 22 detects charging information including the remaining amount of the in-vehicle battery 23 and transmits it from the first communication means 21 as needed.

  As a communication path in this case, it is most preferable to constantly or regularly communicate information regarding the remaining amount of the in-vehicle battery 23 that changes every moment while the electric vehicle 2 is traveling. A communication network (cell phone, PHS, WiFi, WiMax, etc.) is assumed, and finally, the second communication means 14 provided in the electric water heater 1 installed in the house receives and controls judgment means 11 Is taken in. In order to reduce the amount of communication data, the charging information detection means 22 transmits the charging information from the first communication means 21 only when the remaining amount of the in-vehicle battery 23 has changed. Useful for.

  The control determination means 11 plays a central role in this power control system, and performs data calculation, determination, and control of various means. Specifically, after reading the time from the clock unit 12 and instructing the boiling unit 10 to boil or instructing the boiling to stop, the vehicle-mounted battery is connected via the power supply unit 13 and the charging plug 24. 23 is charged and controlled. The power feeding means 13 is also provided with a warehousing detection function for detecting that an electric vehicle is admitted and the in-vehicle battery 23 can be charged. In particular. This is a function to detect that the charging plug 24 is connected to the power supply means 13 and detect that the electric vehicle is stored and ready to be charged. It becomes possible to do it with the highest priority.

  Furthermore, the control determination means 11 calculates the time required for charging according to the remaining amount of the in-vehicle battery 23, or calculates the time required for boiling water in the electric water heater 1 (boiling time). The amount of hot water that can be boiled per certain time is calculated, and the electricity bill required for it is calculated. In addition, the hourly electricity rate information is stored inside the control determination means 11 so that the time required for boiling by the boiling means 10 and the charging time for the in-vehicle battery 23 are efficiently performed. Control. The efficiency mentioned here is not only to make the electricity price cheapest based on the hourly electricity price information, but also to consider the user's intent regarding energy saving and to make the convenience more efficient than the electricity price. It also includes pursuing or giving priority to charging the in-vehicle battery 23.

  Since the process of the control determination means 11 is complicated, it demonstrates using FIGS.

  FIG. 2 is a diagram showing the overall flow of the process of the control determination unit in Embodiment 1 of the present invention, and FIG. 3 is an example of the flow of the process of the control determination unit in Embodiment 1 of the present invention (boiling). It is a figure which shows the case where an electric vehicle arrives after the raising start.

  2 to 3 show the flow of processing when the heating time zone and the charging time zone of the on-vehicle battery 23 fall within the cheapest power time zone shown in the electricity rate information by time zone. Yes.

  Hereinafter, the flow of processing will be described with reference to FIGS. 2 and 3, but since all operations are performed by the control determination unit 11, expressions such as those performed by the control determination unit 11 are omitted.

  First, in FIG. 2, the time required for boiling (boiling time) is calculated (step 1000), and information (charging information) relating to charging of the in-vehicle battery 23 is received via the second communication means 14 (step 1). 1100), and the charging time of the in-vehicle battery 23 is obtained or calculated from the charging information (step 1200). Note that the charging information described here may include information on the charging time, but it may not be included and the charging time may be calculated by estimating the charging time from the remaining battery level. is there.

  Next, the boiling time and the charging time are added to calculate the boiling start time (step 1300), and the calculated boiling start time is compared with the electricity rate information according to time zone (step 1400) to obtain the cheapest power time. It is determined whether or not it fits in the zone (step 1500), and if it fits, step 1100 until the time acquired from the clock means 12 reaches the cheapest time zone described in the hourly electricity rate information. Repeat from. By repeating from step 1100, it becomes possible to always respond according to the latest information of the in-vehicle battery 23 (step 1700).

  When the time acquired from the clock means 12 becomes the cheapest time zone described in the hourly electricity rate information (step 1700), boiling is started (step 1800).

  The detailed flow of step 1900 is described with reference to FIG. In FIG. 3, it is determined whether or not the boiling has been completed (step 1901). If the boiling has not been completed, whether or not the electric vehicle 2 has been received is confirmed by the warehousing detection function of the power feeding means 13 (step 1902).

  When it is detected that the electric vehicle 2 has entered, boiling is temporarily interrupted (step 1903), charging of the in-vehicle battery 23 is started (step 1904), and charging is continued until charging is completed (step 1905). After completion of charging, it is confirmed whether or not the boiling has been interrupted (step 1906). If the boiling has been interrupted, the boiling is resumed (step 1907) and the boiling is continued until the boiling is completed. Continue (step 1908). If the boiling has been completed at the start of charging and the boiling has not been interrupted (step 1906), a series of processing ends.

  FIG. 5 is a diagram showing an example (when the travel distance is short) of the charge information for each time zone, the heating period, and the charging period for the in-vehicle battery 23 in Embodiment 1 of the present invention. FIG. 5 shows the relationship between the boiling period (not divided), the in-vehicle battery charging period, and the charge information by time zone at this time, and the cheapest power time of 9 yen / KW for both periods. It is shown that the battery is within the belt, and the boiling power and charging are completed smoothly without exceeding the limit power (the breaker flies and the power is cut off). It can be seen that charging is performed preferentially, and as a result, it starts as soon as possible and ends as soon as possible. In Fig. 5, as soon as the cheapest power time zone is reached, the boiling of the hot water is not started immediately, but it is delayed for a while. The reason for this is that the heated hot water cools down. This is because extra power is required, and it is preferable to delay the start of boiling as much as possible from the viewpoint of energy saving. However, in pursuit of convenience, it is convenient to boil hot water as soon as possible, and it is convenient to keep the charging time for the in-vehicle battery 23 as long as possible, and it is also a matter that is contrary to energy saving. There is also an aspect that it is impossible to say which is better.

  On the other hand, if the electric vehicle 2 arrives before the boiling is finished, the boiling is temporarily stopped and charging the vehicle-mounted battery 23 is given the highest priority. This will be described with reference to FIG. FIG. 6 is a diagram showing an example (when the travel distance is short) of the charge information for each time zone, the heating period, and the charging period for the in-vehicle battery 23 in Embodiment 1 of the present invention. This shows the relationship between the (divided) boiling period, the in-vehicle battery charging period, and the hourly charge information, but both periods are within the cheapest power time zone of 9 yen / KW. This shows that the battery has been successfully heated up and charged without exceeding the limit power (the breaker flies and causing a power failure), and the on-board battery is preferentially charged to the electric vehicle. As a result, it can be seen that it starts as soon as possible and ends as soon as possible.

  The case where the travel distance is a little larger can be processed similarly, and will be described with reference to FIG. FIG. 7 is a diagram showing an example of the relationship between the charge information by time zone, the heating period, and the charging period for the in-vehicle battery in Embodiment 1 of the present invention (when the travel distance is a little larger). The relationship between the charge information according to time zone, the boiling period, and the charging period for the in-vehicle battery 23 at this time is shown. In order to boil up the entire amount of hot water that will not be reduced, boiling is started, interrupted and restarted at the cheapest time zone described in the electricity price information for each time zone, exceeding the limit power In this case, the heating and charging are completed smoothly, and the on-vehicle battery 23 of the electric vehicle 2 is preferentially charged, and as a result, it starts as soon as possible and ends as soon as possible. You can see that

  In the description so far, the boiling start time calculated by adding the boiling time and the charging time will be described focusing on the case where the heating time is always within the cheapest power time zone in light of the electricity rate information by time zone. It was. However, in actuality, the boiling start time calculated by adding the boiling time and the charging time is compared with the electricity rate information by time zone, as when the travel distance of the electric vehicle 2 becomes very large. And it may happen that it does not fit in the cheapest power hours. In that case, boiling is started (step 1550) after the determination condition of step 1500 in FIG. 2, and then the process proceeds to step 1600.

  FIG. 4 is a diagram showing an example of a process flow of the control determination unit 11 according to Embodiment 1 of the present invention (when it does not fit in the cheapest power band), and details of step 1600 in FIG. 2 are described. However, FIG. 4 shows the flow of processing when the heating time zone and the charging time zone for the in-vehicle battery 23 do not fit in the cheapest power time zone indicated in the electricity rate information by time zone. ing. Similarly, the flow of processing will be described below with reference to FIG. 4 and FIG. In FIG. 4, first, the user is made to select whether to give priority to energy saving by the display input means 15 or to ignore energy saving and give priority to convenience (step 1601). However, when performing this display input, the user is not always near, so it is also possible for the user to select in advance which one to prioritize. The operation for prompting the display and input by the display input means 15 is passed, and step 1601 and step 1602 are passed.

  First, a case will be described where the user selects not to give priority to convenience but to give priority to energy saving in step 1602.

  If the user has chosen to give priority to energy saving (step 1602), the amount of hot water to be heated up is reduced to calculate the amount of reduced hot water and the electricity bill corresponding to that amount in order to keep it in the cheapest power time zone. (Step 1603), the amount of boiling hot water reduced by the display input means 15 and the necessary electricity bill are displayed, and the user's consent is requested (Step 1604). However, at this time as well, the user is not necessarily nearby, so it is possible for the user to approve in advance. In such a case, display or input by the display input means 15 is not possible. The prompting operation is passed, and step 1604 and step 1605 are passed.

  Similarly, when the time acquired from the clock means 12 is the cheapest time zone described in the hourly electricity rate information (step 1607), the heating of the reduced amount of boiling water is started (step 1608). Since the following is the same as the above description, it is omitted.

  If the user has chosen to prioritize convenience (step 1602), the clock means 12 calculates the start time required to boil up the total amount rather than within the cheapest power time zone. It is determined whether or not the acquired time has reached the boiling start time (step 1650). If the boiling start time has not been reached, the process is repeated from step 1100 in FIG. As described above, it is possible to respond according to the information of the in-vehicle battery 23.

  When the boiling start time is reached (step 1609), boiling of the entire amount that does not decrease is started (step 1610).

  FIG. 8 is a diagram showing an example of the relationship between the charge information for each time zone, the heating period, and the charging period for the in-vehicle battery 23 in the first embodiment of the present invention (when the travel distance is very large). The figure shows the relationship between hourly rate information, power consumption, and time when energy saving priority is selected. In this way, in order to boil the reduced hot water, boiling is started, interrupted and restarted at the cheapest time zone described in the electricity rate information by time zone, exceeding the limit power (breaker The battery is successfully boiled and charged, and the electric vehicle 2 is preferentially charged to the in-vehicle battery 23, so that it can be started as soon as possible. , You can see that it ends early.

  FIG. 9 is a diagram showing an example (when the travel distance is very large) of the charge information for each time zone, the heating period, and the charging period for the in-vehicle battery 23 in Embodiment 1 of the present invention. The figure shows the relationship between hourly rate information, power consumption, and time, especially when priority is given to convenience. In order to boil up the entire amount of hot water without reducing capacity, Before the cheapest time zone described in the electricity price information starts, boiling is started, interrupted, restarted, and it does not exceed the limit power (breaker breaks out and blackouts), and it goes smoothly It can be seen that the boiling and charging are completed, and the in-vehicle battery 23 of the electric vehicle 2 is preferentially charged, and as a result, it starts as soon as possible and ends as soon as possible.

  In the description so far, due to the characteristics of the in-vehicle battery 23, it has been described on the basis that the battery is always fully charged at the time of charging. However, such a method is not necessarily preferable from the viewpoint of energy saving. The user predicts the distance traveled on the next day (or the amount of charge corresponding to it) in advance, inputs that fact from the display input means 15, and requires the amount of charge required without full charge each time. It is conceivable that the charging time is shortened by charging only the charging time, and both boiling and charging are completed at the cheapest time zone end time described in the hourly electricity rate information.

  Also, although the minimum amount of boiling water is determined in advance and it cannot be completed at the cheapest time zone end time described in the electricity rate information for each time zone, the minimum overhang time (in a time zone that is not a cheap price zone) It may be possible to reduce the boiling time as much as possible, and a method of use that harmonizes comfort and economy is also conceivable.

  Moreover, although the communication path in this case has described that it is most preferable to always or regularly communicate information regarding the remaining amount of the in-vehicle battery 23 that changes every moment while the electric vehicle 2 is traveling, Otherwise, there is no problem even if communication is performed during parking, and communication may be performed when the electric vehicle starts (when it gets on) or when it ends (when it gets off).

  In addition, it is naturally assumed that a car navigation system is installed in the electric vehicle 2 in this case. In this case, the electric water heater 1 at home including the position information by GPS is transmitted to the home. Calculate the distance from the vehicle, estimate the amount of charge of the in-vehicle battery 23 that will be consumed before returning home, and the time required for the charge. It is also conceivable to adjust the raising start time.

  Furthermore, in the above description, the electric power competition between the electric water heater 1 and the in-vehicle battery 23 has been taken up. However, the present invention is not limited to this, and it is possible to operate in the cheapest time zone described in the electricity rate information by time zone. It is possible to obtain the same effect by controlling the competition with other devices (such as a washing / drying machine and a dishwasher) in the same manner.

  Moreover, although described with the electric water heater in the description so far, the electric water heater which boils only using electric heat may be sufficient.

  Although it has been described that there is one electric water heater 1 and one electric vehicle 2 existing in the home, it is of course not limited thereto, and there may be a plurality of electric vehicles 2, If they exist, give priority to them and finish charging in descending order of priority, or change the priority according to the distance traveled (priority is given to the battery with a shorter distance traveled) In the electric water heater 1, it may be possible to give priority to optimize the overall efficiency in the same manner, and various effects can be expected.

  As mentioned above, let the electric water heater know the remaining amount of the in-vehicle battery in advance and increase the boiling start time of the electric water heater or reduce the amount of hot water to be heated according to the remaining amount of the in-vehicle battery. The cheapest electricity price is recorded in the electricity price information recording means because it falls within the time zone of the cheapest electricity charge, or the heating is interrupted and resumed to give priority to starting and ending charging of the on-board battery of the electric vehicle. When the electric water heater has not boiled even after the electricity bill time period, or when trying to use an electric vehicle, the on-board battery is insufficiently charged and the electric vehicle does not move, or the purpose of the electric vehicle It provides a power control system that can avoid significant inconveniences such as being unable to reach the ground, and is efficient and efficient with limited contract power and allowable power. To provide a power control system that makes it possible to reduce the usage fee or, on the contrary, prioritize convenience over the electricity bill, and clearly reflect the user's intentions regarding energy consumption. I can do it.

DESCRIPTION OF SYMBOLS 1 Electric water heater 2 Electric vehicle 10 Boiling means 11 Control judgment means (electricity rate information according to time zone)
12 Clock means 13 Power supply means (entrance detection)
14 Second communication means 15 Display input means 21 First communication means 22 Charging information detection means 23 In-vehicle battery 24 Charging plug

Claims (6)

An in-vehicle battery, a charging plug for charging the in-vehicle battery, a charge information acquiring unit that detects a remaining amount of the in-vehicle battery and acquires information related to charging according to the remaining amount of the in-vehicle battery; An electric vehicle equipped with a communication means,
Boiling means for boiling hot water, clock means, calculation of time required for charging according to the remaining amount of the on-vehicle battery, calculation of boiling time, calculation of boiling water amount, and calculation of electricity bill Control determining means for holding and controlling or determining electric charge information by time zone, power supply means for charging the vehicle battery by connecting the charging plug, and second communication means An electric water heater equipped with
In the power control system for controlling the charging to the vehicle-mounted battery and the power supply to the boiling means based on the electricity bill information by time zone,
Information relating to the charging is transmitted from the first communication means and received by the second communication means, the boiling time calculating means calculates a boiling start time from the information relating to the charging, and the control determination When the time when the means reads from the timepiece means is the boiling start time, the boiling means starts boiling, and the electric vehicle is received by the power supply during the boiling by the boiling means. When the power is detected, the heating control is stopped, the charging to the in-vehicle battery is started from the power supply means, and after the charging to the in-vehicle battery is completed, the interrupted boiling is resumed. When the control determination means determines that the boiling start time does not fall within the cheapest electricity bill time zone recorded in the electricity bill information recording means, the control judgment means only has the cheapest electricity bill time zone. The power control system according to claim 1, wherein the amount of hot water to be boiled is calculated and the amount of hot water to be boiled is calculated only in the time zone of the cheapest electricity rate. When the control determination unit determines that the boiling start time does not fall within the cheapest electricity rate time zone recorded in the electricity rate information recording unit, the boiling is recorded in the electricity rate information recording unit. The power control system according to claim 1, wherein the power control system starts in a time zone other than a time zone of the cheapest electricity charge. Processing when the control determination unit determines that the electric water heater includes a display input unit, and the boiling start time does not fall within the cheapest electric charge time zone recorded in the electric charge information recording unit (Increase the boiling start time, or reduce the amount of hot water to be heated and keep it in the cheapest electricity bill time zone) The display input means displays and inputs in advance to the user, and the instruction boiling start time The power control system according to claim 1, wherein the power control system performs an operation in accordance with a method of reducing the amount of hot water to be heated or reducing the amount of hot water to be kept within a time zone of the cheapest electricity rate. When the control determination means determines that the boiling start time does not fall within the cheapest electricity bill time zone recorded in the electricity bill information recording means, the control judgment means only has the cheapest electricity bill time zone. The electric power control according to claim 1, wherein the display input means displays the amount of hot water boiled in the water, the electric charge therefor, the amount of hot water that rises beyond the cheapest electric charge time zone, and the electric charge therefor. system. The program for making a computer perform at least 1 operation | movement in the power control system of any one of Claims 1-5.

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