Charging power allocation device

Abstract

To provide a charged power allocation device which can cope with fluctuations in demand power for each day of the week, exactly sets power allocatable for charging a vehicle to avoid the operation of a limiter on a power supply side.SOLUTION: A charged power allocation device comprises: a storage unit 33 which stores a power amount in the past supplied for charging a vehicle by bisecting one day into daytime and nighttime; and a controller CPU 34 which sets an allocation power amount for charging the vehicle in each of the daytime and the nighttime for a week after tomorrow on the basis of data of the storage unit 33, in which the controller CPU 34 determines the allocation power amount for a week hereafter on the basis of the power amount data supplied for charging the vehicle in the last one week.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a charging power allocation device that sets an allocation amount of charging power to an electric vehicle equipped with a storage battery. [Background technology]

[0002] There is a charging system that is configured to start supplying power to an electric vehicle equipped with a storage battery and to charge the vehicle during times when other loads are using less power, by incorporating a timer in the vehicle or by having a timer on the charger side so that the overall power demand does not exceed, for example, a demand value. For example, in Patent Document 1, a charging control unit of a vehicle is provided with a timer, and charging control is performed based on a time set on the timer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-89002 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional timer-controlled charging systems were able to carry out efficient charging by utilizing the time periods when less power was being supplied to other loads, based on the set timer time, when there was little variation in power consumption depending on the day of the week. However, in an environment where the facility where the charger for vehicle charging is installed has a large variation in the state of other loads depending on the day of the week, the calendar function does not function effectively, and there are cases where a large amount of power is consumed by other loads even during the time period set by the timer for vehicle charging. In such a case, for example, a situation occurs where the demand value is exceeded. In such cases, a limiter would be activated on the power supply side, preventing the vehicle from being fully charged, and conversely, if there was excess power, charging could occur more than expected.

[0005] In view of these problems, the present invention aims to provide a charging power allocation device that can respond to fluctuations in power demand on each day of the week, accurately sets the power that can be allocated to vehicle charging, and prevents the operation of a limiter on the power supply side. [Means for solving the problem]

[0006] In order to solve the above problem, the charging power allocating device according to the invention of claim 1 has a past data storage unit that stores the amount of power supplied to vehicle charging for each day or for each time unit obtained by dividing a day by a predetermined time, and an allocation power amount determination unit that sets an allocation power amount to be allocated to vehicle charging for each day or for each predetermined time unit for a specific period from tomorrow onwards based on data in the past data storage unit. The allocated power amount determination unit determines the allocated power amount for the next week based on the data of the amount of power supplied to the vehicle for charging in the most recent past few weeks or the most recent past week. Let us assume that. According to this configuration, the amount of power allocated for vehicle charging is set for each day or for each time unit obtained by dividing a day into a specified number of hours based on past performance, so it is possible to set the amount of power used elsewhere on each day of the week, and it is possible to prevent situations in which the power supply side limiter is activated or the maximum power usage set is exceeded. Furthermore, since it is set automatically, the amount of power allocated can be set with simple operations.

[0007] Furthermore, The amount of power to be allocated for vehicle charging over the next week is automatically set based on the most recent performance, allowing for highly accurate settings to be made with simple operations.

[0008] Claim 2 The invention is as follows: 1 In the described configuration, the past data storage unit stores the number of vehicles charged in a day or in time units divided by a specified time, and the allocated power amount determination unit, when determining the allocated power amount for tomorrow and thereafter, also determines the allocation amount per vehicle based on the vehicle number data in the past data storage unit. According to this configuration, the allocation amount per vehicle is set based on past data, so that the appropriate amount of charging can be achieved without the user having to set the amount of charging for the vehicle.

[0009] Claim3 The invention is as follows: 1 or 2 In the configuration described above, the time unit divided by a predetermined time is a time unit obtained by dividing a day into two parts, day and night, and the allocated power amount determination unit determines the allocated power amount divided into two parts, day and night, for the next week based on the data in the past data storage unit. According to this configuration, in facilities where vehicle charging equipment is installed, the amount of electricity that can be allocated to vehicle charging during the day and at night is often different, so by being able to set different allocation amounts for daytime and nighttime, power can be allocated in a realistic manner.

[0010] Claim 4 The invention is as follows: 1 to 3 In the configuration described in any one of the above, the power allocation unit has a setting operation means that enables the amount of power allocated determined by the power allocation determination unit to be changed, and the setting operation means enables the amount of power allocated to each day of the week for the next week to be automatically set by copying data for a specific day of the week to data for another day of the week. With this configuration, if there is a day in the coming week that is different from a normal weekday, such as a public holiday, the settings for Sunday, for example, can be copied, making it easy to change the allocation even if the conditions are different from those for the same day in the most recent week.

[0011] Claim 5 The invention is as follows: 4 In the configuration described above, by operating the setting operation means, the actual data for one week at any time stored in the past data storage unit can be set as the data for the past week that the allocated power amount determination unit refers to in order to set the allocated power amount for the next week, and the allocated power amount determination unit can determine the allocated power amount for the next week based on the data for a specific past period retrieved by the setting operation means. This configuration allows the creation of allocation data for the coming week based on actual data for any period in the past. Therefore, for a special week in the year, such as the New Year's holiday, the amount of allocated power can be set based on data from a year ago, allowing for highly accurate settings with simple operations. Effect of the Invention

[0012] According to the present invention, the amount of power allocated for vehicle charging per day or per specified time is set based on past performance, so it is possible to set the amount of power used for other purposes on each day of the week, and it is possible to prevent situations where the limiter on the power supply side is activated or where the maximum amount of power usage set is exceeded. Furthermore, since it is set automatically, the amount of power allocated can be set with simple operations. [Brief description of the drawings]

[0013] [Figure 1] 1 is a configuration diagram showing an example of a charging power allocating device according to the present invention; [Diagram 2] FIG. 2 is a block diagram of a control device. [Diagram 3] FIG. 2 is a block diagram of a setting device. [Figure 4] 13 is a table showing the actual power supply performance for the past week. [Diagram 5] 1 is a table showing the set weekly supply schedule. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a configuration diagram showing an example of a charging power allocating device according to the present invention. As shown in Fig. 1, the charging power allocating device 1 includes a plurality of chargers 2 for charging vehicles, a control device 3 that determines the amount of power allocated to the chargers 2 and controls the chargers 2, and a setting device (setting operation means) 4 that operates the control device 3. A commercial power source 5, which is AC power, is supplied to the chargers 2. The control device 3 and each of the chargers 2 are connected by a signal line L1, and the control device 3 and the setting device 4 are connected by a signal line L2.

[0015] In addition, reference numeral 6 denotes a load in the facility where the charger 2 is installed, and reference numeral 7 denotes a watt-hour meter such as a smart meter. The control device 3 acquires information about the received power from the watt-hour meter 7.

[0016] Fig. 2 shows a block diagram of the control device 3. As shown in Fig. 2, the control device 3 includes a charger communication unit 31 that communicates with each charger 2, an external device communication unit 32 that communicates with the setting device 4, a storage unit (past data storage unit) 33 that stores information on the amount of power provided in the past for vehicle charging and stores information on the amount of power allocated in the future that has been set, and a control device CPU 34 that controls the control device 3. The control device CPU 34 is an allocated power amount determination unit that calculates the allocated power amount described later, and controls the charging power supplied to the charger 2.

[0017] Fig. 3 shows a block diagram of the setting device 4. As shown in Fig. 3, the setting device 4 has an operation unit 41 for performing setting operations, a display unit 42 for displaying setting contents and the like, a setting device CPU 43 for controlling the setting device 4, a setting device communication IF 44 for communicating with the control device 3, and the like, and for example, a personal computer or a tablet terminal can be used.

[0018] The charging power allocating device 1 configured as described above operates as follows. Immediately after starting to use the charging power allocating device 1, no past data is stored, so the amount of allocated power to be allocated to vehicle charging is set by an input operation using the setting device 4. By performing a predetermined setting operation on the setting device 4, a setting screen (not shown) for setting the schedule for the week from tomorrow onwards is displayed, and the administrator sets the amount of allocated power for each day of the week for the coming week from the setting device 4, taking into consideration the contract power or demand value with the power company and the power required by other loads in the facility.

[0019] The control device 3 controls the amount of power supplied to the charger 2 based on this allocated power information. However, the control device 3 prioritizes controlling the charging power so that the received power does not exceed the contracted power or the demand value based on information from the power meter 7. As a result, the upper limit of the power supplied to the charger 2 is limited by the set allocated power amount, but if a situation occurs in which the power supplied to other loads exceeds the expected amount and exceeds the contracted power or the demand value, the power supplied to the charger 2 is limited even if it does not reach the set allocated power amount.

[0020] After one week has passed since this control was performed, the memory unit 33 accumulates performance data on the amount of electric power used to charge the vehicle during the week. Figure 4 shows an example of data accumulated in this way for the past week. Data is stored by dividing one day into two parts, daytime and nighttime. For example, data for daytime is stored as 12 hours from 6:00 AM, and data for nighttime is stored as 12 hours from 6:00 PM. In addition, under the control of the control device CPU34, the number of vehicles that were charged during each time period is also stored. In this way, data is accumulated by dividing each day into two parts for each day of the week as shown in FIG. 4, and this data can be displayed on the display unit 42 of the setting device 4 by a predetermined operation of the setting device 4, so that the person setting the data can easily view it.

[0021] When data for one week or more has been accumulated, it becomes possible to easily set the next week. A predetermined setting operation of the setting device 4 can automatically set a calendar (allocation calendar) of the amount of allocated power for the next week. Fig. 5 shows a list of automatically set amounts of power supply for the next week. This set value is set by the control of the control device CPU 34 through the operation of the setting device 4, based on the results for the previous week shown in Fig. 4. At that time, it is set in increments of 5 kWk, and for example, for results between 10 kWh and 14 kWh, it is set to 10 kWh. The formula for this automatic setting is arbitrary, and the calculation may be performed by rounding up, or the actual value may be left unchanged and used as the set value.

[0022] At that time, the control device CPU 34 calculates and sets the amount of charging per vehicle based on the number of vehicles stored together with the actual value. For example, it is known from the information in the storage unit 33 that two vehicles were charged during the daytime on the most recent Monday. From this data, it is assumed that the number of vehicles to be charged during the daytime on the following Monday will also be two. If the user does not set the amount of charging, then 2.5 kWh, which is half the setting value of 5 kWh for the daytime on Monday, is set as the amount of charging energy for each vehicle connected to the charger 2, and control is performed so that this amount of energy is charged. Then, when the amount of charging energy reaches 2.5 kWh, charging is terminated.

[0023] In addition, by operating the setting device 4, the days of the week of the setting data can be copied, and an allocation calendar for the coming week can be set based on data from any time in the past. For example, if data on power supply to vehicle charging for more than one year has been accumulated, the allocation of power for the coming week can be set based on data from one week a year ago, rather than the most recent week.

[0024] Specifically, if the week you are setting includes days such as holidays where the electricity usage differs from that on weekdays, the data from the previous week will not be useful. In such cases, you can first create an allocation calendar for the week using automatic settings, and then copy the set Sunday data to the holidays. By copying using the setting device 4, you can easily change the settings even if there are holidays within the week. Furthermore, when setting an allocation calendar for a special week in a year with consecutive holidays such as New Year's, it is advisable to set the allocation calendar for the coming week based on data for the same week from the same time period one year ago. By operating the setting device 4, data for the same week from the same time period one year ago is retrieved from the memory unit 33 of the control device 3, and the allocation calendar for the coming week is set based on the retrieved data. Through this operation, the amount of allocated power for the coming week is set and the allocation calendar is created.

[0025] In this way, the amount of power allocated for vehicle charging is set for each day or for each time unit into which a day is divided into a specified number of hours based on past performance, so it is possible to set the amount of power used elsewhere on each day of the week, and it is possible to prevent situations in which the power supply side limiter is activated or the maximum power usage set is exceeded. Furthermore, since it is set automatically, the amount of power allocated can be set with simple operations. In addition, the amount of power to be allocated for vehicle charging over the next week is automatically set based on the most recent performance, allowing for highly accurate settings to be made with simple operations. Furthermore, in facilities where vehicle charging equipment is installed, the amount of electricity that can be allocated to vehicle charging often differs between daytime and nighttime, and being able to set different allocation amounts for daytime and nighttime allows power to be allocated in a way that is in line with reality. In addition, the allocation amount per vehicle is set based on past data, allowing users to charge the appropriate amount without having to set the vehicle's charging amount. In addition, if there are any days in the coming week that are different from normal weekdays, such as holidays, you can copy the settings for Sunday, for example, so that you can easily change the allocation even if the conditions are different from the same day of the previous week. In addition, in the case of special weeks throughout the year, such as the New Year holidays, the allocated power amount can be set based on data from the previous year, allowing for highly accurate settings with simple operations.

[0026] In the above embodiment, the allocation amount for the next week is set based on the performance of the past week, but it may be set based on the average performance value for the past several weeks. In addition, when setting the next week based on the performance data of the most recent week, specifically, when setting the quota for the next week from tomorrow based on the performance data of this week, it is also possible to set the quota for next week based on the performance data of last week after leaving a week in between. Since this setting form allows a week of leeway, it is possible to set it in advance. Furthermore, although a day is set to be divided into two parts, day and night, it is also possible to set it without dividing it into two, or to divide a day into more parts. In addition, the control device 3 and the setting device 4 are connected by a signal line L2, but the setting device 4 may be installed in a separate management center or the like away from the facility where the charger 2 is installed, and connected via a communication network (not shown). [Explanation of symbols]

[0027] 1...Charging power allocation device, 2...Charger, 3...Control device, 4...Setting device (setting operation means), 31...Charger communication unit, 32...External device communication unit, 33...Memory unit (past data memory unit), 34...Control device CPU (allocated power amount determination unit), 42...Display unit.

Claims

1. a past data storage unit that stores an amount of power supplied to vehicle charging for each day or for each time unit obtained by dividing a day by a predetermined time, and an allocation power amount determination unit that sets an allocation power amount to be allocated to vehicle charging for each day or for each of the predetermined time units for a specific period from tomorrow onwards based on data from the past data storage unit, The charging power allocating device is characterized in that the allocation power amount determination unit determines the allocation power amount for the next week based on data on the amount of power supplied to vehicle charging over the most recent past few weeks or the most recent past week.

2. the past data storage unit stores the number of vehicles charged in one day or in a time unit divided by the predetermined time, 2. The charging power allocation device according to claim 1, wherein the power allocation amount determination unit, when determining the power allocation amount for tomorrow and thereafter, also determines the amount of power allocated per vehicle based on the vehicle count data in the past data storage unit.

3. The time unit divided by the predetermined time is a time unit obtained by dividing a day into two parts, namely, day and night, 3. The charging power allocating device according to claim 1, wherein the power allocation amount determining unit determines the amount of power allocated for the next week divided into two parts, day and night, based on the data in the past data storage unit.

4. a setting operation means for enabling a change of the allocated power amount determined by the allocated power amount determination unit, The charging power allocation device according to any one of claims 1 to 3, characterized in that the setting operation means makes it possible to change the automatically set content of the allocated power amount for each day of the week for the next week by copying data for a specific day of the week to data for another day of the week.

5. By operating the setting operation means, the performance data for one week at any time stored in the past data storage unit can be set as data for the past week to be referenced by the allocated power amount determination unit in order to set the allocated power amount for the next week, 5. The charging power allocating device according to claim 4, wherein the power allocation amount determining unit is capable of determining the amount of power to be allocated for the next week based on data for a specific past period retrieved by the setting operation means.

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