JP2013236518A - Storage battery management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control charge and discharge of a storage battery on the basis of the storage amount of the storage battery.SOLUTION: An HEMS 30 determines whether or not the storage amount of a storage battery 90 after discharging the storage battery 90 in a scheduled discharge time remains beyond a first threshold value. When the storage amount of the storage battery 90 remains beyond the first threshold value and a predetermined time exists by a scheduled charge time for charging the storage battery 90 next, possible discharge of the storage battery 90 is displayed on a display unit which the HEMS 30 has.

Description

  The present invention relates to a storage battery management device that controls charging / discharging of a storage battery based on a storage amount of the storage battery.

  There have been devices that display the remaining capacity of a storage battery.

  For example, Patent Document 1 proposes an invention of a storage battery remaining capacity display system capable of easily grasping the remaining capacity of a storage battery.

JP 2011-153909 A

  However, although the technique described in Patent Document 1 can confirm the remaining capacity of the storage amount of the storage battery, there is a problem that it does not consider the charge / discharge control of the storage battery.

  The present invention has been made in consideration of the above-described facts, and an object of the present invention is to provide a storage battery management device that controls charging / discharging of a storage battery based on the storage amount of the storage battery.

  The invention of claim 1 for solving the above-mentioned problem is a time management means capable of presetting a scheduled discharge time for discharging a storage battery and a scheduled charge time for charging the storage battery, and a storage amount for detecting a storage amount of the storage battery. Detecting means; display means capable of displaying a storage amount of the storage battery; discharging the storage battery in the scheduled discharge time; charging the storage battery in the scheduled charge time; and ending the scheduled discharge time After that, it is determined whether or not the storage amount of the storage battery detected by the storage amount detection means remains above a first threshold, and the storage amount of the storage battery remains above the first threshold. Control means for displaying on the display means that the storage battery can be discharged when there is a predetermined time before the scheduled charging time.

  According to the first aspect of the present invention, after the routine discharge, it is determined whether or not the electric power remains in the storage battery. If the electric power remains, it is left that the electric power of the storage battery can be used. Can do.

  According to a second aspect of the present invention, in the first aspect of the present invention, the information processing apparatus further includes a storage unit that stores power consumption amounts of a plurality of power loads provided in the building, and the control unit includes the scheduled discharge time. When the stored amount of the storage battery detected by the detection means after the completion exceeds the first threshold and when the predetermined time is before the scheduled charging time, the storage means stores The display means displays an instruction recommending that the power of the storage battery be supplied to a power load having a higher power consumption with reference to the power consumption of each of the power loads.

  According to the second aspect of the present invention, it is possible to preferentially distribute the power remaining in the storage battery after the routine discharge to a device with a large amount of power consumption.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, when the storage amount of the storage battery detected by the detection unit is equal to or less than the first threshold, the control unit stores the storage battery of the storage battery. Charge to a second threshold whose amount is greater than the first threshold.

  According to the third aspect of the present invention, the storage battery can be charged until the amount of stored electricity reaches a predetermined level.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the power consumption measuring means for measuring the power consumption of the building and the human feeling for detecting the presence of a person in the building. The sensor and the measurement result of the power consumption measuring means and the detection result of the human sensor are transmitted to the information center, and the information center uses the measurement result of the power consumption measuring means and the detection result of the human sensor. Transmitting / receiving means for receiving a charging / discharging schedule including the scheduled discharging time and the scheduled charging time of the storage battery set based on the charging / discharging schedule, and the control means displays the charging / discharging schedule received by the transmitting / receiving means. Display on the means.

  According to the fourth aspect of the present invention, it is possible to set a charge / discharge schedule including the scheduled discharge time and the scheduled charge time of the storage battery from the power consumption of the building and the manned or unmanned time zone of the building.

  According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the information center calculates an average value of the power consumption of the building measured by the power consumption measurement means for a predetermined period of time. Extracting a time period in which an average value of power consumption in the predetermined period exceeds a power consumption threshold, and extracting a time period in which the human sensor is always detected as being manned in the predetermined period, A time zone in which the average value of power consumption in the period exceeds the power consumption threshold and a time zone in which the manned time is always detected in the predetermined period is extracted, and the overlapping time zone is scheduled to be discharged The charge / discharge schedule is set as time.

  According to the fifth aspect of the present invention, when the time zone in which the amount of power consumption of the building is large and the time zone in which the building is manned overlap, the overlapping time zone is determined as the estimated discharge time of the storage battery. The charge / discharge schedule can be set.

  According to a sixth aspect of the present invention, in the invention according to the fifth aspect, the information center is always unattended in a time zone in which the average value of power consumption in the predetermined period is equal to or less than the power consumption threshold. A time zone in which the detected time zone overlaps is extracted, and the charge / discharge schedule is set with the overlapped time zone as the scheduled charging time.

  According to the invention described in claim 6, when the time zone in which the amount of power consumption of the building is small and the time zone in which the building is unattended overlap, the overlapping time zone is determined as the scheduled charging time of the storage battery. The charge / discharge schedule can be set.

  As described above, according to the first aspect of the present invention, when the storage amount of the storage battery exceeds the predetermined first threshold value, the storage battery is informed that further discharge is possible. It has the effect that charging / discharging of a storage battery can be controlled based on the amount of electricity stored.

  According to invention of Claim 2, it has the effect that the electric power which remain | survives in a storage battery can be preferentially supplied, for example to apparatuses with much power consumption, such as an electric water heater.

  According to the third aspect of the present invention, there is an effect that the storage battery can be used quickly by charging the storage battery to a predetermined second threshold instead of being fully charged.

  According to the fourth aspect of the present invention, it is possible to set the estimated discharge time and the expected charge time of the storage battery in consideration of the power consumption of the building and the time zone in which the person is present in the building.

  According to the fifth aspect of the present invention, it is possible to set the time zone in which the power consumption of the building is large and the time when the building is always a friend to the scheduled discharge time of the storage battery. It has the effect that charging / discharging of a storage battery can be controlled in consideration of an actual life pattern.

  According to the invention described in claim 6, the time zone in which the power consumption of the building is small and the building is always unattended can be set as the scheduled charging time of the storage battery. It has the effect that charging / discharging of a storage battery can be controlled in consideration of the life pattern.

It is the schematic which shows the whole image of the system containing the storage battery management apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows schematic structure of HEMS which is the storage battery management apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the control of the storage battery by HEMS which is the storage battery management apparatus which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows the range of the electrical storage amount of a storage battery. It is a schematic diagram which shows the range of the electrical storage amount of a storage battery. It is the schematic which shows the whole image of the system containing the storage battery management apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows schematic structure of HEMS which is the storage battery management apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart of the setting of the charging / discharging schedule in the information center in the 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, an example of the first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an overall image of a system including a storage battery management device according to a first embodiment of the present invention.

  The building 10 is provided with a distribution board 14 to which the system power 12 supplied from the power company is connected, so that the power from the system power 12 is supplied into the building 10 through the distribution board 14. It has become.

  The distribution board 14 is connected to home appliances 20 and housing equipment 22 provided in the building 10 as a plurality of power supply destinations, and is supplied with power from the grid power 12. A storage battery 90 that can charge the power supplied from the system power 12 is connected to the distribution board 14.

  Connected to the distribution board 14 is a HEMS (Home Energy Management System) 30 which is a storage battery management device for managing and controlling energy in the building.

  The HEMS 30 controls the power for supplying the grid power 12 and the storage battery 90 to the building 10 or charging the storage battery 90 with the grid power 12 by controlling the distribution board 14 and the storage battery 90.

  The storage battery 90 is a secondary battery that can be charged and discharged, such as a lead storage battery, a nickel metal hydride battery, or a lithium ion battery. Since one cell of these secondary batteries has an electromotive force of approximately 1 to 2 V, in this embodiment, a plurality of cells are connected in series so that a desired voltage can be obtained. Further, a desired current can be obtained by bundling a plurality of aggregates composed of a plurality of cells connected in series so as to obtain a desired voltage.

  Further, the packaged storage battery 90 converts alternating current (for example, 100 V, 50 Hz) supplied through the distribution board 14 into direct current having a voltage suitable for charging the storage battery, and the storage battery 90 is discharged. Conversion means (not shown) such as a bidirectional inverter capable of converting direct current into alternating current supplied from the distribution board 14 to the home appliance 20 and the housing equipment 22 is provided.

  Furthermore, the storage battery 90 includes a charge / discharge control circuit (not shown) that controls charging / discharging of the storage battery 90 and is controlled by the HEMS 30 together with the above-described inverter.

  The HEMS 30 can calculate the amount of electricity stored in the storage battery 90 from the voltage value of the storage battery 90 measured by a voltage sensor provided in the storage battery 90, and can display the calculated amount of electricity stored in the storage battery 90 on a display unit included in the HEMS 30.

  FIG. 2 is a block diagram showing a schematic configuration of the HEMS 30 which is the storage battery management device according to the embodiment of the present invention.

  As shown in FIG. 2, the HEMS 30 includes a CPU 36, a ROM 38, a RAM 40, and an input / output port 42. These include a bus 44 such as an address bus, a data bus, and a control bus. Are connected to each other.

  A display unit 46, an operation unit 48, and a memory 50 are connected to the input / output port 42 as various input / output devices. The display unit 46 and the operation unit 48 are integrally configured, and a touch panel provided on the display unit 46 can be applied to the operation unit 48.

  In the present embodiment, the scheduled discharge time for discharging the storage battery 90 by the operation of the operation unit 48 can be set in advance, and the HEMS 30 discharges the storage battery 90 when the time set according to the time measuring function provided in the computer is reached. Then, the power obtained by the discharge is supplied to the building 10.

  In the present embodiment, the scheduled charging time for charging the storage battery 90 by the operation of the operation unit 48 can be set in advance, and the HEMS 30 can be set when the storage battery 90 has reached the time set according to the clocking function provided in the computer. To charge.

  The memory 50 stores a program for controlling power supplied to the building 10, a program for controlling charge / discharge of the storage battery 90, and the like.

  Further, the memory 50 stores various information for executing these programs.

  The HEMS 30 performs various types of control such as control of power supplied to the building 10 by developing a program stored in the memory 50 in the RAM 40 and executing it by the CPU 36.

  Further, the distribution board 14 and the storage battery 90 are connected to the input / output port 42.

  Next, control of the storage battery 90 by HEMS30 is demonstrated using FIG.

  FIG. 3 is a flowchart showing control of storage battery 90 by HEMS 30 according to the present embodiment.

  In step 300, it is determined whether or not a scheduled discharge time, which is a time for discharging the storage battery 90, has been reached.

  In step 302, the storage battery 90 is discharged, and in step 304, it is determined whether or not the scheduled discharge time has elapsed.

  If the determination in step 304 is affirmative, it is determined in step 306 whether the storage amount of the storage battery 90 exceeds the first threshold value.

  FIG. 4 is a schematic diagram showing the range of the amount of electricity stored in the storage battery 90. In a storage battery, particularly a lithium ion battery, overcharge and overdischarge cause a reduction in battery life. Therefore, in the present embodiment, as shown in FIG. 4, the storage amount (B%) that is less than the storage amount that is possible in the storage battery 90 is set as the storage amount upper limit value, and the storage amount (A%) that is greater than 0%. Is the first threshold value, which is the lower limit value of the charged amount.

  A% and B% in FIG. 4 can take various values depending on the type of storage battery or the capacity of the storage battery, but as an example, it is conceivable that A% is about 20% and B% is about 80%.

  If the determination in step 306 is affirmative, there is room for the storage battery 90 to be discharged. In step 308, the storage battery 90 is further discharged. In this case, prior to the discharge of the storage battery 90, the display unit 46 of the HEMS 30 may display that the storage battery 90 can be discharged.

  The displayed contents are not limited to merely indicating that the storage battery 90 can be discharged, but may include suggestions on how to use the power obtained by discharging.

  For example, it may be possible to display a message such as “the vehicle can be charged with the power remaining in the storage battery”.

  The indication that the storage battery 90 can be discharged may be limited to a case where the storage amount of the storage battery 90 exceeds the first threshold and there is a predetermined time until the scheduled charging time for charging the storage battery. . The predetermined time can take various values depending on the amount of power remaining in the storage battery 90 and the amount of power consumed by the power load to be used. As an example, it is conceivable to set a time of about 1 to 2 hours.

  In step 310, it is determined whether or not the amount of power stored in the storage battery 90 has become equal to or less than the first threshold value. If the determination is affirmative, the storage battery 90 is charged and the process ends.

  Also in the case of negative determination in step 306. The storage battery 90 is charged and the process ends.

  If the determination in step 310 is negative, there is room for the storage battery 90 to discharge, so the procedure returns to step 308 to discharge the storage battery 90.

  In step 312, the storage battery 90 may be charged up to the storage amount upper limit value shown in FIG. 4, but may be charged up to the second threshold value shown in FIG. 5.

  This is because it takes time and electric power to charge the storage battery 90 to the upper limit value of the storage amount, and therefore it may be reasonable to raise the storage amount of the storage battery 90 to a dischargeable range.

  Although the second threshold value shown in FIG. 5 exceeds the first threshold value, but does not reach the storage amount upper limit value, the time and power required for charging are compared with the case of charging up to the storage amount upper limit value. Less.

  Further, in the present embodiment, when the storage amount of the storage battery 90 remains beyond the first threshold and there is a predetermined time before the scheduled charging time, the following control may be performed. .

  First, the power consumption of each of a plurality of power loads such as the home appliances 20 provided in the building 10 is stored in the memory 50 in advance. The HEMS 30 refers to the power consumption amount of each power load stored in the memory 50 and causes the display unit 46 to display that the power of the storage battery 90 is supplied to the power load having a higher power consumption amount.

  As described above, when the building 10 is provided with a power load such as an electric water heater that consumes a large amount of power, the power remaining in the storage battery 90 can be preferentially distributed.

  As described above, according to the present embodiment, it is determined whether or not the storage battery that has been subjected to the predetermined discharge can be further discharged. If the storage battery can be discharged, the power obtained by discharging the storage battery can be used.

  Moreover, since the control which charges a storage battery is performed when discharge of a storage battery is not possible, there exists an effect that the damage of the storage battery by overdischarge can be prevented.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

  FIG. 6 is a schematic diagram showing an overall image of a system including the storage battery management device according to the present embodiment.

  In the present embodiment, a human sensor 70 that detects the presence of a person in the building 10 is provided in the building 10, and the HEMS 30 is connected to the information center 80 via the network 60. Further, the HEMS 30 is capable of measuring the power consumption of the building 10 based on the current value of the power supplied to the building 10 detected by the current sensor provided on the distribution board 14 as compared with the first embodiment. Is different.

  However, the other configurations are the same as those of the first embodiment, and the configurations common to the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted. To do.

  The human sensor 70 is a sensor that detects the presence of a person in the building 10 using infrared rays, ultrasonic waves, or visible light. As an example, an infrared ray emitted from a human body may be detected, or an infrared ray detection and a detection using ultrasonic waves may be combined.

  The information center 80 sets the charging / discharging schedule of the storage battery 90 based on the power consumption in the building 10 and the detection result of the human sensor.

  The HEMS 30 acquires the charge / discharge schedule of the storage battery 90 set by the information center 80 via the network.

  FIG. 7 is a block diagram showing a schematic configuration of the HEMS that is the storage battery management device according to the present embodiment.

  FIG. 7 differs from the schematic configuration of the HEMS that is the storage battery management apparatus according to the first embodiment of FIG. 2 in that it further includes a network interface 34, but other configurations are different from those of the first embodiment. Are the same.

  The network interface 34 transmits the power consumption of the building 10 and the detection result of the human sensor 70 to the information center 80. Further, the network interface 34 receives the charge / discharge schedule of the storage battery 90 set by the information center 80 based on the power consumption of the building 10 and the detection result of the human sensor 70.

  The HEMS 30 displays the charge / discharge schedule of the storage battery 90 acquired via the network interface 34 on the display unit 46 to notify the user.

  When the user determines that the displayed charging / discharging schedule is appropriate, the user may instruct the HEMS 30 to control charging / discharging of the storage battery according to the acquired charging / discharging schedule by an operation from the operation unit 48. .

  FIG. 8 is a flowchart of the charge / discharge schedule setting in the information center 80 in the present embodiment.

  In step 800, an average value of power consumption of the building over a predetermined period is calculated for each time zone. The predetermined period may be set in consideration of the influence of the season, such as the last week, the last month, or the same month of the previous year.

  The time zone may be every hour from 0 o'clock to 1 o'clock, 1 o'clock to 2 o'clock, every 3 hours from 0 o'clock to 3 o'clock, 3 o'clock to 6 o'clock, or every other hour And the average value of the power consumption of each time slot | zone in the above-mentioned predetermined period is calculated.

  In step 802, a time zone in which the average value calculated in step 800 exceeds a predetermined power consumption threshold is extracted.

  The power consumption amount threshold value is a standard power consumption amount in the building 10, for example, a sum of the average values of the respective time zones calculated in step 800, and a value obtained by dividing the total value by the number of time zones, that is, each An average value based on the average value of the time zone may be used.

  In step 804, a time zone in which the human sensor 70 has always detected a person in the predetermined period is extracted.

  In step 806, a time zone in which the time zone in which the average value of power consumption in the predetermined period extracted in step 802 exceeds the power consumption threshold and the manned time zone extracted in step 804 overlap is extracted, The time zone to be used is the time zone for discharging the storage battery.

  In step 808, a time period in which the average value calculated in step 800 is equal to or less than a predetermined power consumption threshold value is extracted.

  In step 810, a time zone in which the human sensor 70 has not always detected a person in the predetermined period is extracted.

  In step 812, a time zone in which the time zone in which the average value of power consumption in the predetermined period extracted in step 808 is equal to or less than the power consumption threshold and the unattended time zone extracted in step 810 overlap is extracted, The time zone to be used is the time zone for charging the storage battery, and the setting of the charge / discharge schedule is completed.

  Thus, in this Embodiment, the information center 80 can set the charging / discharging schedule of the storage battery 90 from the power consumption of a building and the detection result of the human sensor 70.

  The HEMS 30 is set and can display the charge / discharge schedule on the display unit 46. When the user determines that the displayed charge / discharge schedule is appropriate, the charge / discharge schedule is operated by operating the operation unit 48. Can be activated.

  After the charging / discharging schedule acquired from the information center 80 becomes valid, the HEMS 30 charges the storage battery 90 at the scheduled charging time of the storage battery set in the charging / discharging schedule according to the timekeeping function provided in the computer. The storage battery 90 is discharged at the scheduled discharge time of the storage battery.

  After the discharge, the storage amount of the storage battery 90 is checked, and if the storage amount exceeds the first threshold, the display unit 46 displays that the storage battery 90 can be discharged.

  The user can check the display on the display unit 46 and use the power obtained by discharging the storage battery 90 in the building 10.

10 Building 12 System power 14 Distribution board 30 HEMS
34 Network interface 36 CPU
38 ROM
40 RAM
46 Display unit 48 Operation unit 50 Memory 60 Network 70 Human sensor 80 Information center 90 Storage battery

Claims (6)

A time management means capable of presetting a scheduled discharge time for discharging the storage battery and a scheduled charge time for charging the storage battery;
A storage amount detecting means for detecting a storage amount of the storage battery;
Display means capable of displaying the storage amount of the storage battery;
The storage battery is discharged during the scheduled discharge time, the storage battery is charged during the scheduled charge time, and the storage amount of the storage battery detected by the storage amount detection means after the scheduled discharge time is over is When it is determined whether or not the remaining amount exceeds the first threshold, and the amount of power stored in the storage battery exceeds the first threshold and there is a predetermined time before the scheduled charging time Control means for displaying on the display means that the storage battery can be discharged;
A storage battery management device. It further comprises storage means for storing the power consumption of each of the plurality of power loads provided in the building,
The control means is the case where the storage amount of the storage battery detected by the detection means remains after exceeding the first threshold after the scheduled discharge time ends and the predetermined time before the scheduled charging time. In the case where there is, the display means refers to the power consumption amount of each power load stored in the storage means, and instructs the display means to recommend that the power of the storage battery is supplied to the power load having a higher power consumption. The storage battery management apparatus according to claim 1 to be displayed.   The control means charges when the storage amount of the storage battery detected by the detection means is less than or equal to the first threshold value, until the storage amount of the storage battery is larger than the first threshold value. Item 3. The storage battery management device according to item 1 or 2. Power consumption measuring means for measuring the power consumption of the building;
A human sensor for detecting the presence of a person in the building;
The measurement result of the power consumption measuring means and the detection result of the human sensor are transmitted to the information center, and the information center is set based on the measurement result of the power consumption measuring means and the detection result of the human sensor. Transmitting / receiving means for receiving a charge / discharge schedule including the estimated discharge time and the expected charge time of the storage battery;
Further comprising
The storage battery management apparatus according to any one of claims 1 to 3, wherein the control unit causes the display unit to display a charge / discharge schedule received by the transmission / reception unit. The information center
A time period in which the average value of the power consumption of the building measured by the power consumption measuring unit in a predetermined period is calculated for each time period, and the average value of the power consumption in the predetermined period exceeds the power consumption threshold value And a time zone in which the human sensor is always detected as being manned within the predetermined period, and a time period in which an average value of power consumption in the predetermined period exceeds a power consumption threshold value and the predetermined time period The storage battery management device according to claim 4, wherein a time zone in which a time zone always detected as manned in a period is extracted, and the charge / discharge schedule is set with the overlapping time zone as the scheduled discharge time.   The information center extracts a time zone in which a time zone in which the average value of power consumption in the predetermined period is equal to or less than the power consumption threshold and a time zone in which the unmanned state is always detected in the predetermined period overlaps, The storage battery management apparatus according to claim 5, wherein the charging / discharging schedule is set with the overlapping time zone as the scheduled charging time.

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