KR101847177B1 - Home energy stroage system and method for allocating electronic energy thereof - Google Patents

Abstract

According to the present invention, a home energy storage system allowing only life essential load for life maintenance to be operated to be able to perform actual operating efficiency and optimal operation in case of need when power failure or abnormality of a power system is detected comprises: an energy storage unit including a battery module storing electric energy; a power conversion unit including a power module for converting the electric energy to match a rated voltage of life essential load; a smart distribution unit supplying the converted electric energy for the life essential load and blocking the electric energy being supplied; and a control unit detecting power failure or abnormality of a power system and changing electric energy supply to the life essential load to be transmitted through the energy storage unit through control of the smart distribution unit when the power failure or the abnormality of the power system is detected.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home energy storage system,

The present invention relates to a domestic energy storage system and a method for allocating electric energy thereof.

At home, there is a disaster prevention / method system that uses a temperature sensor, a gas leakage sensor, a penetration sensor, etc. to ensure safety, and an on / off operation for an electronic device such as an air conditioner, TV, And a telecontrol system to be implemented are widely available and commercialized. However, these sensors or electronic devices are generally controlled independently of each other.

In recent years, home automation system has been integrated with these sensors or electronic devices, and as a result, it has become possible to provide comprehensive control over the computer, thereby enhancing safety and convenience at home.

On the other hand, in apartments that occupy the majority of residential structures in Korea, the use of electronic loads such as boilers, electric lamps, and refrigerators including security equipments in case of power outage are all restricted. Especially when power is cut off due to home automation and automation, There is a problem that the operation of the electronic load is limited.

That is, in the conventional home automation system, since the electric power supplied to all the electronic / electric loads is interrupted at the time of power failure, it is not necessary to provide the function of controlling the operation even during power failure.

As a result, the heating function due to power failure, the storage and cooking of food can not be performed, and most of the light devices can not be used. Therefore, there is a problem that the maintenance of life can not be minimized. Thus, physical damage is increased and mental anxiety is increased .

In addition, in areas where electric energy supply is unstable, it is difficult to live because of damage or incomplete operation of electronic equipment due to unstable electric power system.

In recent years, there has been a growing interest in home energy storage systems.

However, existing home energy storage systems are limited in utility and capacity, so it is difficult to cover all of the loads in the home, and it is not widely used because it has various problems such as power supply for charging even when installed .

In this connection, Korean Patent Laid-Open Publication No. 10-2002-0057071 (name of the invention: household power generation system) is provided with a spare fuel supply means for supplying a small amount of fuel to the stack in an emergency, And the power is supplied to the stack immediately when emergency power of the commercial power source is generated, so that emergency power generation can be performed while emergency measures are taken.

The embodiment of the present invention is directed to a home energy storage system that operates only essential life loads for life maintenance so as to be able to perform optimum operation in case of abnormal operation or abnormal operation in case of an abnormality in the power system, And how to allocate them.

It should be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

According to a first aspect of the present invention, there is provided an energy storage system for a household, comprising: an energy storage unit including a battery module storing electric energy; A smart power distribution unit for supplying the converted electric energy to the life essential load or for interrupting the electric energy being supplied, and an abnormality of the power or electric power system, And a control unit for changing the supply of electric energy to the life essential load through the energy storage unit through the control of the smart power distribution unit when it is detected that the power failure or the power system is abnormal.

The energy storage unit includes a plurality of parallel-connected battery modules, and the power conversion unit includes a plurality of parallel-connected power modules, wherein the battery module and the power module can be mounted and detached.

The control unit may control the individual battery modules by receiving an electric energy amount and power flow information of each of the battery modules included in the energy storage unit while transmitting and receiving data by assigning an ID according to the mounting of the battery module.

The control unit may be configured to shut off the electrical connection of the detected battery module when a battery module having a voltage exceeding a predetermined threshold range is detected among the plurality of battery modules and if the detected voltage of the battery module falls within the critical range As the voltage is sensed, the disconnected electrical connection with other battery modules can be released.

According to an embodiment of the present invention, an input / output unit for interfacing with a home automation system is further provided, and as the energy amount of each of the plurality of battery modules is outputted through the input / output unit, The controller may block the electrical connection of the battery module to correspond to the set information.

Wherein the control unit analyzes a usage pattern of a plurality of loads connected through an indoor power distribution unit and extracts a life essential load among the plurality of loads based on the analyzed usage pattern, wherein the usage pattern includes a daily power consumption amount and a daily use frequency . ≪ / RTI >

Wherein the control unit is operable to variably operate the plurality of parallel-connected battery modules and the power modules according to the life essential load on the basis of the analyzed utilization pattern, wherein the supply priority for the electric energy And the capacity and the number of the battery module and the power module can be varied and allocated according to the supply priority.

The battery module and the power module may be formed separately from the energy storing unit and the power converting unit, and may be formed in a portable case so as to be usable as an external energy storing device.

The power conversion unit may further include a solar photovoltaic module for interlocking with the solar photovoltaic generator, wherein the control unit stores electric energy within a buffer range in the battery module, and the photovoltaic generator received through the solar photovoltaic module When it is detected that the electric energy under development corresponds to the normal power generation range, the supply of electric energy to the life essential load can be changed to be supplied to the electric energy received through the solar light coupling module through the control of the smart power distribution unit have.

According to a second aspect of the present invention, there is provided a method of allocating electrical energy through a domestic energy storage system, comprising the steps of: detecting a power failure or an abnormality in a power system; Converting the electric energy stored in the energy storage unit through the power conversion unit including the power module so as to match the rated voltage of the life essential load when the power failure or the power system is detected as an abnormality; Changing the supply of the converted electric energy to the life essential load through the energy storage unit including the battery module storing the electric energy through the control of the smart distribution unit; Detecting whether the power failure or the power system abnormality is released; And interrupting the supply of electric energy through the control of the smart power distribution unit and changing electric energy to be supplied through the indoor power distribution box when it is detected that the power failure or the abnormality of the power system is released.

According to any one of the above-mentioned objects of the present invention, it is possible to supply electric power to the essential life load and to control the life essential load in the case of power failure, usually for improving the power quality against abnormal operation of power system supply or momentary power failure So that a basic life can be maintained even in the case of a power failure.

In addition, since a plurality of battery modules and power modules are modularly implemented, they can be operated in a variable manner and can be mounted and dismounted, so that they can be configured as portable external energy storage devices for various purposes, There is an advantage that it is available for the purpose.

In addition, it can be widely used as an energy storage device for various purposes at low cost, without modifying or changing the components, compared with a conventional domestic energy storage system in which most of the devices are usually operated in a standby state or are utilized in a very limited manner There are advantages.

FIG. 1 is a schematic view for explaining a household energy storage system according to an embodiment of the present invention.
2 is a block diagram of a domestic energy storage system according to an embodiment of the present invention.
FIG. 3 is a flowchart of a method of allocating electric energy through a household energy storage system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted.

Whenever a component is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, not the exclusion of any other element, unless the context clearly dictates otherwise.

FIG. 1 is a schematic view for explaining a household energy storage system 100 according to an embodiment of the present invention. 2 is a block diagram of a domestic energy storage system 100 according to an embodiment of the present invention.

The household energy storage system 100 according to an embodiment of the present invention includes an energy storage unit 110, a power conversion unit 120, a smart power distribution unit 130, and a control unit 140.

The energy storage unit 110 includes a battery module storing electric energy. At this time, since the battery module is configured to have a battery capacity of about 1 kWh to 2 kWh, it is possible to implement a small-sized domestic energy storage system 100.

The power conversion unit 120 includes a power module that converts electrical energy to match the rated voltage of the life essential load.

The smart power distributing unit 130 supplies electric energy converted through the power converting unit 120 to the living essential load or blocks the electric energy being supplied. The smart power distribution unit 130 can perform an on / off operation using a semiconductor switch, and can supply and cut electrical energy through control of the corresponding switch.

The Smart Distribution Unit 130 can measure the amount of electric energy supplied to the life essential load through the semiconductor switch or supplied to the battery module and transmit the measurement value to the home automation 20 or the control unit 140. [

On the other hand, when the power supplied through the indoor power distribution box 10 is cut off due to a power outage or the non-normal system power is supplied due to an abnormality of the power system, the smart power distribution unit 130 measures it, So that the energy supply can be controlled to be supplied from the energy storage unit 110.

That is, the control unit for controlling the energy storage unit 110 and the power conversion unit 120 and the control unit in the smart power distribution unit 130 may be distinguished from each other. However, The power storage unit 110, the power conversion unit 120, and the smart power supply unit 130 are controlled through the power supply unit 140 as described below.

The control unit 140 controls the energy storage unit 110, the power conversion unit 120, and the smart power distribution unit 130. Specifically, when the controller 140 detects an abnormality in the power failure or the power system, and if it is detected that there is a power failure or an abnormality in the power system, the controller 140 controls the smart power supply unit 130 to supply electric energy to the life essential load And is transmitted through the energy storage unit 110.

That is, the sensors and electronic appliances in use at home are supplied with electrical energy through the indoor cabinet 10, but in the case of power failure or abnormality in the power system, So that the electric energy can be continuously supplied through the first electrode 110.

Meanwhile, the energy storage unit 110 may include a plurality of parallel-connected battery modules, and the power conversion unit 120 may include a plurality of parallel-connected power modules. The plurality of battery modules and the power modules may be configured to be mountable and demountable for each module.

At this time, the specific specifications of the plurality of battery modules and the power module may be configured to have the same or different specifications.

The plurality of parallel-connected battery modules and the power module are configured in a block-like structure, so that the output capacity and the battery capacity can be changed according to the user's demand. For example, if five battery modules and a power module are provided, the user can adjust all of the five battery modules and the power module, or adjust the battery capacity and the output capacity variably by driving only a specific number.

Accordingly, the seller who sells the home energy storage system 100 can adjust the number of the modules according to the battery capacity and the output capacity desired by the user, and sell them. Further, when the user judges that the battery capacity and the output capacity of the installed household energy storage system 100 are insufficient, he / she can additionally purchase each module and install the additional module. If it is determined that the capacity is excessive, .

When the individual battery modules are installed in the energy storage unit 110, the control unit 140 may assign IDs to identify the respective battery modules and transmit and receive data. Accordingly, the control unit 140 can receive the electric energy amount and power flow information of each battery module included in the energy storage unit 110 and control the individual battery module.

At this time, the control unit 140 controls the individual battery modules to be charged and discharged, and when a problem occurs in the individual battery modules, the control unit 140 switches the switches so that the electrical connection with the energy storage unit 110 is interrupted And can be electrically separated.

In addition, when a battery module having a cell voltage exceeding a predetermined threshold range among a plurality of battery modules is sensed, that is, the cell voltage of a specific battery module is relatively higher than a cell voltage of other battery modules Or cuts off the electrical connection with the energy storage unit 110 of the detected battery module. When the cell voltage of the corresponding battery module is detected again to a voltage within the critical range, the disconnected electrical connection with the other battery module can be released.

As described above, the residential energy storage system 100 according to an exemplary embodiment of the present invention has an advantage in that safety can be ensured by isolating the battery module from the energy storage unit 110 by isolating the battery module from the battery module 110, have.

Meanwhile, the home energy storage system 100 according to an embodiment of the present invention may further include an input / output unit 150 for interworking with the home automation 20.

The input / output unit 150 may output the residual electrical energy amount of each of the plurality of battery modules, and this information may be transmitted to the home automation 20 and displayed. When the user confirms the amount of energy output to the input / output unit 150 and sets at least one of the number of operation of the plurality of battery modules and the request for blocking the electrical connection to the specific battery module, the control unit 140 sets The electrical connection of the battery module can be cut off so as to correspond to the information.

Meanwhile, the household energy storage system 100 according to an exemplary embodiment of the present invention analyzes the usage patterns of a plurality of loads connected through the indoor power distribution unit, and calculates a plurality of loads It is possible to extract essential life load rules. At this time, the usage pattern may be a daily power consumption amount, a daily use frequency, and the like. It is needless to say that the life essential load may also be set by the user.

For example, if there is an electric fan, a refrigerator, a TV, or a lamp in the house, the controller 140 may determine whether the daily power consumption is high, the frequency of use is high, It is possible to extract the life essential load among the loads. Accordingly, the refrigerator has a higher power consumption than other electronic devices and can be extracted as a life essential load because the number of times of use is always in use. In the case of a lamp, the power consumption is small but is used almost every day at a specific time. Can be extracted as a load.

Extracting this life essential load may be performed based on a pre-learned algorithm. In other words, after setting an input condition for daily power consumption, number of times of use, use of a specific time zone, and learning an algorithm by designating life essential load as an output, the control unit 140 uses the algorithm If the load that is collected according to the pre-learned condition is extracted, it can be extracted as a life essential load.

In addition, the control unit 140 can variably operate a plurality of parallel-connected battery modules and power modules according to the life essential load based on the analyzed utilization pattern.

That is, the control unit 140 may set the supply priority for the electric energy according to the life essential load on the basis of the analyzed usage pattern, and may vary the capacity and the number of the battery module and the power module according to the supply priority order .

In this case, the manual setting of the user may be also reflected and operated variably, and the number of operations and priority can be set through the input / output unit 150 described above.

For example, if the refrigerator is always used and the power consumption is considered to be the highest, and the priority of the supply is set to be the highest priority, in a state where the daily power consumption of the life essential load, the frequency of use, The battery module and the power module are separately allocated to the refrigerator, or the battery modules and the power modules having the larger capacity are allocated to supply more electric energy, and the remaining battery modules and the power modules are integrally supplied to the life essential load So that electric energy can be supplied.

That is, the energy storage unit 110 and the power conversion unit 120 of the home energy storage system 100 according to an embodiment of the present invention can distribute electric energy to a plurality of life essential loads, According to the priorities, it is possible to supply more stable electric energy through control for each module for the life essential load set to be more important.

Accordingly, there is an advantage that stable electrical energy supply is possible for a life essential load, which is always important to be driven at all times, such as a refrigerator, by supplying a small amount of electric energy in a priority order in an emergency such as a power failure.

Meanwhile, the household energy storage system 100 according to an embodiment of the present invention may be configured such that the battery module and the power module are modularly mountable and detachable, and thus the separated battery module and the power module are housed in the portable case It can be embedded and used as an external energy storage device.

The user checks the energy amount of each of the plurality of battery modules displayed on the input / output unit 150 or the home automation 20, and can disconnect the battery module and the power module according to the operation number or the request for the electrical shutdown of the specific battery module have. And by inserting the detached battery module and the power module into the portable case, it can be used as an external energy storage device which can be used from the outside.

The battery module is recharged as an external energy storage device, and then the battery module and the power module are coupled to and connected to the household energy storage system 100 again.

As described above, according to an embodiment of the present invention, when an emergency such as a power failure occurs, electric energy is supplied to the life essential load through the household energy storage system 100, and when the household energy storage system 100 is charged It is possible to maximize the utilization of the energy storage device by using it as an external energy storage device.

Meanwhile, the power conversion unit 120 of the domestic energy storage system 100 according to an embodiment of the present invention may further include a solar light coupling module 160 for interlocking with the solar generator 30. That is, the power conversion unit 120 in the embodiment of the present invention simultaneously applies the power module for performing bi-directional power conversion and the solar light coupling module 160 for receiving the electric energy generated from the solar generator 30 .

Basically, both the power module and the solar connection module 160 include a power conversion function in the form of a DC / DC converter, and are driven under the control of the control unit 140.

In this case, in order to prevent the increase in volume, weight, and cost due to the redundant power conversion function by excluding the AC / DC unit to be connected to the AC system in the embodiment of the present invention, Is not supplied to the load through the smart power distribution unit 130 or transmitted back to the power system.

The control unit 140 continuously monitors the state of charge of the battery module and the amount of power generated by the photovoltaic generator 30 received through the solar light coupling module 160 to store electric energy within the buffer range for the battery module, When the optical coupling module 160 detects that it is in the normal power generation range through the received electric energy, the electric power supply to the life essential load is controlled by the solar power connection module 160 through the control of the smart power distribution unit 130, To be supplied with the electric energy received through the electric power source.

That is, the control unit 140 basically uses the electric energy received by the solar light coupling module 160 to charge the battery module, and when the battery module is fully charged, (130) to change the subject of power supply.

If the electric energy received through the solar light coupling module 160 does not reach the normal power generation range, the controller 140 controls the electric energy to be supplied through the indoor distribution box 10 again.

As described above, the embodiment of the present invention can maximize the utilization of the battery module by charging the battery module through the solar light coupling module 160 and controlling the electric energy to be supplied to the life essential load when the battery module is fully charged .

Meanwhile, the control unit 140 may include a communication module, a memory, and a processor.

The communication module can transmit and receive data to and from the components constituting the home automation 20 or the home energy storage system 100. Such a communication module may include both a wired communication module and a wireless communication module. The wired communication module may be implemented by a power line communication device, a telephone line communication device, a cable home (MoCA), an Ethernet, an IEEE1294, an integrated wired home network, and an RS-485 control device. In addition, the wireless communication module can be implemented with a wireless LAN (WLAN), Bluetooth, HDR WPAN, UWB, ZigBee, Impulse Radio, 60 GHz WPAN, Binary-CDMA, wireless USB technology and wireless HDMI technology.

A program for controlling the household energy storage system 100 is stored in the memory. Herein, the memory is collectively referred to as a non-volatile storage device and a volatile storage device which keep the stored information even when no power is supplied.

For example, the memory may be a memory card such as a compact flash (CF) card, a secure digital (SD) card, a memory stick, a solid-state drive (SSD) A magnetic computer storage device such as a NAND flash memory, a hard disk drive (HDD), and the like, and an optical disc drive such as a CD-ROM, a DVD-ROM, and the like.

The processor may control each component of the home energy storage system 100 as it executes programs stored in the memory.

2 may be implemented in hardware such as software or an FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and may perform predetermined roles can do.

However, 'components' are not meant to be limited to software or hardware, and each component may be configured to reside on an addressable storage medium and configured to play one or more processors.

Thus, by way of example, an element may comprise components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, Routines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.

The components and functions provided within those components may be combined into a smaller number of components or further separated into additional components.

Hereinafter, a method of operating the domestic energy storage system 100 according to an embodiment of the present invention will be described in detail with reference to FIG.

3 is a flowchart illustrating a method of operating the domestic energy storage system 100 according to an embodiment of the present invention.

In the method of allocating electrical energy according to an embodiment of the present invention, the control unit 140 first detects whether there is a power failure or a power system failure (S110).

When it is detected that there is an abnormality in the power failure or the power system, the electric energy stored in the energy storage unit 110 is converted through the power conversion unit 120 including the power module so as to match the rated voltage of the life essential load ( S120).

Next, the converted electrical energy supply to the life essential load is changed to be transmitted through the energy storage unit 110 including the battery module storing the electric energy through the control of the smart power distribution unit 130 (S130 ).

The control unit 140 continuously detects whether the power failure or the power system abnormality is released at step S140. If it is detected that the power failure or the power system abnormality is released, the control unit 140 controls the smart power distribution unit 130 And the electric energy is supplied through the indoor distribution box 10 (S150).

In the above description, steps S110 to S150 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. Also, some of the steps may be omitted as necessary, and the order between the steps may be changed. In addition, the contents already described with respect to the domestic energy storage system 100 in Figs. 1 and 2 apply to the electric energy allocation method in Fig. 3 even if other contents are omitted.

While the methods and systems of the present invention have been described in connection with specific embodiments, some or all of those elements or operations may be implemented using a computer system having a general purpose hardware architecture.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: Indoor distribution box
20: Home automation
30: Solar generator
100: Household energy storage system
110: Energy storage unit
120: Power conversion section
130: Smart distribution
140:
150: Input /
160: Photovoltaic module

Claims (10)

In a household energy storage system,
An energy storage unit including a battery module storing electric energy,
A power conversion unit including a power module for converting the electrical energy to match the rated voltage of the life essential load,
A smart distribution unit for supplying the converted electric energy to the living essential load and for blocking electric energy being supplied and
Wherein the control unit controls the smart distribution unit to change the supply of electric energy to the life essential load to be transmitted through the energy storage unit when the power failure or power system abnormality is detected, And a controller,
The control unit sets the usage pattern of the home including the specific time zone usage, the daily power consumption amount and the daily use frequency as the input condition, sets the life essential load as the output condition,
Wherein the home essential energy is extracted from a plurality of loads connected through an in-house power distribution unit, the loads matching the conditions of the previously learned algorithm, Storage system. The method according to claim 1,
The energy storage unit includes a plurality of parallel-connected battery modules,
Wherein the power conversion unit includes a plurality of parallel-connected power modules,
Wherein the battery module and the power module are configured to be mountable and removable. 3. The method of claim 2,
Wherein the control unit controls the individual battery modules by receiving an electric energy amount and power flow information of each of the battery modules included in the energy storage unit and transmitting and receiving data by giving an ID according to the mounting of the battery module, Energy storage system. The method of claim 3,
The control unit may be configured to shut off the electrical connection of the detected battery module when a battery module having a voltage exceeding a predetermined threshold range is detected among the plurality of battery modules and if the detected voltage of the battery module falls within the critical range And disconnects the disconnected electrical connection with the other battery module as sensed by the voltage. The method of claim 3,
An input / output unit for interlocking with the home automation,
When the energy amount of each of the plurality of battery modules is outputted through the input / output unit, at least one of the operation number of the plurality of battery modules and the electrical connection cutoff request for the specific battery module is set by the user, And disconnects the electrical connection of the battery module so as to correspond to the battery module. delete 3. The method of claim 2,
Wherein the control unit variably manages the plurality of parallel-connected battery modules and the power modules according to the life essential load based on the analyzed usage pattern,
Wherein the supply priority is set for the electrical energy for each life essential load based on the utilization pattern and the capacity and the number of the battery module and the power module are varied and assigned according to the supply priority order, . 3. The method of claim 2,
Wherein the battery module and the power module are separately formed from the energy storing unit and the power converting unit, and are built in a portable case so as to be usable as an external energy storing device. The method according to claim 1,
The power conversion unit may further include a solar light coupling module for interlocking with the solar generator,
Wherein when the electric energy stored in the buffer module is stored in the battery module and electric energy being generated by the solar generator received through the solar module is detected as being in the normal power generation range, And the electric energy supply to the life essential load is changed to be supplied to the electric energy received through the solar light coupling module through the entire control. A method for allocating electrical energy through a domestic energy storage system,
Setting an in-house usage pattern including a specific time zone use status, a daily power consumption amount, and a daily use frequency as an input condition, and setting an essential life load as an output condition and learning an algorithm;
Collecting the usage pattern of the home by using the learned algorithm and extracting the life essential load from a load matching the condition of the pre-learned algorithm among a plurality of loads connected through the indoor distribution unit;
Detecting a power failure or an abnormality in the power system;
Converting the electric energy stored in the energy storage unit through the power conversion unit including the power module so as to match the rated voltage of the life essential load when the power failure or the power system is detected as an abnormality;
Changing the supply of the converted electric energy to the life essential load through the energy storage unit including the battery module storing the electric energy through the control of the smart distribution unit;
Detecting whether the power failure or the power system abnormality is released; And
And a step of blocking the supplied electric energy through control of the smart power distribution unit and changing electric energy to be supplied through the indoor power distribution box when it is detected that the power failure or the abnormality of the power system is released, Way.

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