KR102664413B1 - Battery apparatus and power management method - Google Patents

Abstract

According to one embodiment, a battery device and a power management method that can protect a circuit even when a power cutoff signal is suddenly applied may be provided. By turning off the power when a power-off request is received from the switch circuit or DC-DC converter, the circuit can be protected from sudden power-off.

Description

Battery apparatus and power management method {Battery apparatus and power management method}

In this disclosure, a battery device and a power management method are provided. Specifically, a battery device and power management method that can protect a circuit even when a power cut signal is suddenly applied may be provided.

Recently, as awareness of environmental protection has increased, interest in methods of generating electricity without emitting pollutants such as carbon dioxide has been emerging. In particular, in the case of power generation systems using solar energy, the spread is gradually expanding as the development and installation costs of the technology become cheaper thanks to technological advancements.

In this solar power generation system, a plurality of solar battery cells are gathered together to form a plurality of photovoltaic modules, and the DC power generated from the plurality of solar battery modules is converted to AC power through an inverter to be used for household and It can be used directly in industrial facilities.

In solar power generation systems, circuit breakers are used to cut off power during the power supply and storage process. However, when the circuit breaker operates, there is a problem that damage to the circuit may occur due to sudden power supply interruption. Therefore, when power supply is cut off, a method for safely protecting the circuit is required.

The present disclosure may provide a battery device and a power management method. Specifically, a battery device and power management method that can protect a circuit even when a power cut-off signal is suddenly applied may be provided. The technical challenges to be solved are not limited to the technical challenges described above, and may further include various technical challenges within the scope apparent to those skilled in the art.

The battery device according to the first aspect includes a battery; A DC-DC converter connected to the battery; a power supply circuit that receives and supplies operating power of the DC-DC converter from the battery; and a switch circuit that receives a power cut-off signal, wherein when the power supply circuit receives both the first power-off request received from the switch circuit and the second power-off request received from the DC-DC converter, The power applied to the DC-DC converter can be blocked.

Additionally, when the power-off signal is received, the switch circuit may transmit the first power-off request to the power supply circuit and the DC-DC converter.

In addition, when the DC-DC converter receives the first power cut request, it switches to a cut-off standby mode in preparation for power cut, and when the switch to the cut-off standby mode is completed, the DC-DC converter sends the second power cut request to the power supply. It can be transmitted through a circuit.

In addition, the DC-DC converter may further include a breaker that cuts off power connected to the outside, and the power cutoff signal may be transmitted from the breaker to the switch circuit.

Additionally, the power supply circuit may include a standby IC (standby integrated circuit) that cuts off power applied to the DC-DC converter in response to the first power-off request and the second power-off request.

Additionally, the standby IC may apply power to the power supply circuit according to a power application request received from the switch circuit.

In addition, it may further include a field effect transistor (FET) that electrically connects the power supply circuit and the DC-DC converter to apply power to the power supply circuit in response to a power application request received from the switch circuit.

A power management method according to a second aspect includes the steps of a switch circuit receiving a power cut-off signal from a circuit breaker; A power supply circuit that supplies operating power to a DC-DC converter receives a first power-off request from the switch circuit; receiving, by the power supply circuit, a second power-off request from the DC-DC converter; and blocking, by the power supply circuit, power applied to the DC-DC converter.

Additionally, upon receiving the first power-off request, switching the DC-DC converter to a cut-off standby mode in preparation for power-off; And when the transition to the cut-off standby mode is completed, the DC-DC converter may further include transmitting the second power-off request to the power supply circuit.

The third aspect may provide a computer-readable recording medium recording a program for executing the method according to the second aspect on a computer.

In addition to this, another method for implementing the present disclosure, another system, and a computer-readable recording medium recording a computer program for executing the method may be further provided.

According to one embodiment, a battery device and a power management method that can protect a circuit even when a power cutoff signal is suddenly applied may be provided. By turning off the power when a power-off request is received from the switch circuit or DC-DC converter, the circuit can be protected from sudden power-off.

1 is a diagram illustrating a solar power generation system according to an embodiment. A solar-linked energy storage system may be an example of a solar power generation system.
FIG. 2 is a block diagram showing the configuration of a battery device 100 according to an embodiment.
FIG. 3 is a block diagram showing the configuration of the battery device 100 according to an embodiment along with the flow of data.
FIG. 4 is a block diagram illustrating an example of the power supply circuit 110 according to an embodiment in more detail in relation to other components.
FIG. 5 is a truth table showing an operation 530 of the power supply circuit 110 according to a first power-off request 510 and a second power-off request 520, according to an embodiment.
FIG. 6 is a block diagram illustrating an example of a battery device 100 including a field effect transistor (FET) 620 according to an embodiment.
FIG. 7 is a flowchart explaining how the breaker 140, the switch circuit 120, the DC-DC converter 130, and the power supply circuit 110 operate according to an embodiment.
FIG. 8 is a flowchart illustrating a power management method for turning off power to the DC-DC converter 130 according to an embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and as long as it is within the scope of the technical idea of the present invention, one or more of the components may be optionally used between the embodiments. It can be used by combining or replacing.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless specifically defined and described, are generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and the meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted by considering the contextual meaning of the related technology.

Additionally, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In this specification, the singular may also include the plural unless specifically stated in the phrase, and when described as “at least one (or more than one) of A and B and C”, it is combined with A, B, and C. It can contain one or more of all possible combinations.

Additionally, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and are not limited to the essence, sequence, or order of the component.

And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, that component is directly 'connected', 'coupled', or 'connected' to that other component. In addition to cases, it may also include cases where the component is 'connected', 'coupled', or 'connected' by another component between that component and that other component.

Additionally, when described as being formed or arranged “above” or “below” each component, “above” or “below” means that the two components are directly connected to each other. This includes not only the case of contact, but also the case where one or more other components are formed or disposed between the two components. In addition, when expressed as “top” or “bottom,” the meaning of not only the upward direction but also the downward direction can be included based on one component.

Additionally, the values described below can be interpreted as values within a reasonable range depending on the error. For example, a number written as “1” may be interpreted as “1.01.”

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating a solar power generation system according to an embodiment. A solar-linked energy storage system may be an example of a solar power generation system.

As shown in FIG. 1, the solar power generation system may include a solar power source 10, an inverter 20, a battery pack 30, and a load (LOAD, 50).

However, those skilled in the art can understand that other general-purpose components other than those shown in FIG. 1 may be included in the solar power generation system. For example, the solar power generation system may further include a power grid (GRID) 40. Alternatively, according to another embodiment, those skilled in the art may understand that some of the components shown in FIG. 1 may be omitted.

The solar power source 10 according to one embodiment may be composed of a plurality of solar cell modules (photovoltaic modules) in which solar cell cells are gathered, and the solar cell combining a P-type semiconductor and an N-type semiconductor emits light. generates electricity. Specifically, when light shines on a solar cell, electrons and holes are generated inside. The generated charges move to the P and N poles, respectively, and this action creates a potential difference between the P and N poles. At this time, when a load (LOAD) is connected to the solar cell, current flows. Here, the solar battery cell refers to the minimum unit that generates electricity. The solar battery cells are gathered together to form a battery module, and the battery modules form an array connected in series/parallel to form the solar power source 10. can do.

The inverter 20 according to one embodiment uses AC (alternating current) power to supply DC (direct current) power generated from the solar power source 10 through the photoelectric effect to the power grid 40 or the load 50. It can be converted to . Here, the power grid 40 may refer to a grid for transmitting and distributing power produced by a solar power generation system. Meanwhile, the amount of power generated by the solar power source 10 continues to change depending on temporal factors such as sunrise and sunset or external factors such as weather. Therefore, the inverter 20 controls the voltage generated from the solar power source 10 to find the maximum power and supplies it to the power grid 40. At this time, if the power for operating the inverter is lower than the output power of the inverter, the inverter 20 may consume power from the power grid 40 in reverse. Of course, in this case, the inverter can prevent the power reverse phenomenon by blocking the power flowing into the power grid 40. Accordingly, various optimization control methods are applied to the solar power generation system to extract maximum power from the solar power source 10 so that the above-described inverter 20 operates more efficiently.

Representative maximum power point tracking (MPP) methods of the solar power source 10 include the Perturbation and Observation (PO) method, the Incremental Conductance (IC) control method, and the Constant Voltage (CV) control method. Here, the PO method is a method of periodically measuring the voltage and current of the solar power source 10 to calculate power and then tracking MPP using the power value. The IC control method is a method of measuring the voltage and current generated from the solar power source 10 and controlling the power change rate to '0' in response to the change in the terminal voltage operating point of the array. The CV control method is a method of controlling with a constant reference voltage (ref V) regardless of the operating voltage or power of the array forming the solar power source 10. Depending on each optimization control method, the power source input from the solar power source 10 to the inverter may operate as a voltage source or a current source.

The load 50 according to one embodiment may refer to a product that uses a type of electricity used in real life. For example, the inverter 20 can obtain AC power of a desired voltage and frequency through an appropriate conversion method, switching element, or control circuit, and supply electricity to home appliances in general homes or mechanical products in industrial facilities.

Additionally, in the case of solar power generation, there is bound to be a gap in power production in which sufficient power generation is not achieved due to changes in weather or at night when solar power is not present. Therefore, in order to compensate for these shortcomings, batteries are essential to solar power generation systems to ensure stable power supply.

The battery pack 30 according to an embodiment may include at least one of a DC-DC converter, a battery, a battery management system (BMS), and a battery control circuit.

The battery may be composed of a lithium ion battery or a nickel hydride battery, but is not necessarily limited to this configuration and may refer to a battery that can be used semi-permanently through charging.

A DC-DC converter is a device that can convert DC power produced through solar power 10 into DC power appropriate for a battery. It generally converts DC power into AC power and then converts AC power back into DC power. Power is converted by reverse conversion.

The battery management system (BMS) functions to prevent misuse of the cells that make up the battery, balance between unit cells, measure the remaining charge (SOC: State of Charge), temperature maintenance, or system monitoring. function can be provided. Therefore, based on the sensor that measures the state of the cell and the function of receiving the sensor's measured value and transmitting it to the control system of the application product, an abnormal signal is generated when the temperature and charging state of the system exceed the set value and the You can build and control circuits that block and open power circuits.

Meanwhile, the inverter 20 and the battery pack 30 may further include a display device (not shown). For example, the user can check the power supply and demand status of the solar panel, reverse wiring, sleep mode operation, or battery state of charge through the display device. Meanwhile, display devices include liquid crystal display, thin film transistor-liquid crystal display, organic light-emitting diode, flexible display, and 3D display. display), electrophoretic display, etc. Additionally, the display device may include two or more displays depending on the implementation type. Additionally, when the touchpad of the display has a layered structure and is configured as a touch screen, the display can be used as an input device in addition to an output device.

Additionally, the inverter 20 and the battery pack 30 may communicate with each other through wired communication or wireless communication. For example, the inverter 20 and the battery pack 30 may include a Wi-Fi chip, a Bluetooth chip, a wireless communication chip, an NFC chip, etc. Of course, the inverter 20 and the battery pack 30 can communicate with various external devices using a Wi-Fi chip, Bluetooth chip, wireless communication chip, NFC chip, etc. Wi-Fi chips and Bluetooth chips can communicate using Wi-Fi and Bluetooth methods, respectively. When using a Wi-Fi chip or a Bluetooth chip, various connection information such as SSID and session key are first transmitted and received, and various information can be transmitted and received after establishing a communication connection using this. A wireless communication chip can perform communication according to various communication standards such as IEEE, Zigbee, 3G (3rd Generation), 3GPP (3rd Generation Partnership Project), and LTE (Long Term Evolution). The NFC chip can operate in the NFC (Near Field Communication) method using the 13.56MHz band among various RF-ID frequency bands such as 135kHz, 13.56MHz, 433MHz, 860~960MHz, 2.45GHz, etc.

FIG. 2 is a block diagram showing the configuration of a battery device 100 according to an embodiment. The battery device 100 shown in FIG. 2 may have a configuration corresponding to the battery pack 30 described above in FIG. 1 . According to one embodiment, the battery device 100 may operate as a battery pack 30.

As shown in FIG. 2 , the battery device 100 may include a power supply circuit 110, a switch circuit 120, a DC-DC converter 130, a breaker 140, and a battery 150.

However, those skilled in the art can understand that other general-purpose components other than those shown in FIG. 2 may be further included in the battery device 100. For example, the battery device 100 may further include a Battery Management System (BMS) (not shown). Additionally, the DC-DC converter 130 may further include a micro controller unit (MCU) (not shown). Alternatively, according to another embodiment, those skilled in the art may understand that some of the components shown in FIG. 2 may be omitted. For example, the circuit breaker 140 may be omitted from the configuration of the battery device 100.

The DC-DC converter 130 according to one embodiment may supply power delivered from the circuit breaker 140 to the battery 150. The circuit breaker 140 can supply power received from the outside to the DC-DC converter 130, and can electrically block the connection between the outside and the DC-DC converter 130 in response to a cut-off request by user input, etc.

The DC-DC converter 130 according to one embodiment may output power received from the battery 150 to the outside through the breaker 140. Charging or discharging of the battery 150 may be performed depending on external circumstances (e.g., when power is generated or when power is consumed). Referring to FIG. 2, the DC-DC converter 130 may be connected to the circuit breaker 140 and the battery 150.

Additionally, the DC-DC converter 130 may operate by receiving power from the power supply circuit 110. The power that the DC-DC converter 130 receives from the power supply circuit 110 may be different from the power that the DC-DC converter 130 transfers between the breaker 140 and the battery 150. For example, the voltage of the power supplied by the DC-DC converter 130 from the power supply circuit 110 and the voltage of the power delivered by the DC-DC converter 130 between the breaker 140 and the battery 150 may be different. You can.

The power that the DC-DC converter 130 receives from the power supply circuit 110 is the power for the DC-DC converter 130 to operate, and is used by devices (e.g., MCU), etc. included in the DC-DC converter 130. can be consumed by The power supply circuit 110 may receive and convert power used in the operation of the DC-DC converter 130 from the battery 150 and supply it to the DC-DC converter 130.

The switch circuit 120 according to one embodiment may receive a power cut-off signal from the breaker 140. The breaker 140 may transmit a power cutoff signal to the switch circuit 120 when there is a cutoff request due to a user input, etc.

When the switch circuit 120 receives a power cutoff signal from the circuit breaker 140, it may transmit a first power cutoff request to the power supply circuit 110. When the power supply circuit 110 receives both the first power-off request received from the switch circuit 120 and the second power-off request received from the DC-DC converter 130, the power supply circuit 110 switches to the DC-DC converter 130. The applied power can be blocked. When the power supply circuit 110 does not receive either the first power-off request received from the switch circuit 120 and the second power-off request received from the DC-DC converter 130, the DC-DC converter ( 130), the supply of power applied can be maintained.

Additionally, when the switch circuit 120 receives a power-off signal from the circuit breaker 140, it may transmit a first power-off request to the DC-DC converter 130. When the DC-DC converter 130 receives the first power cutoff request from the switch circuit 120, it switches to the cutoff standby mode in preparation for power cutoff, and when the switch to cutoff standby mode is completed, it sends the second power cutoff request. It can be transmitted to the power supply circuit 110.

As described above, when the power supply circuit 110 receives both the first power-off request received from the switch circuit 120 and the second power-off request received from the DC-DC converter 130, the DC-DC Since the power applied to the converter 130 is cut off, the power applied from the power supply circuit 110 to the DC-DC converter 130 may be cut off when the transition to the cut-off standby mode is completed. Therefore, even when the power to the circuit breaker 140 is suddenly cut off, the internal circuit of the battery device 100 (e.g., the internal circuit of the DC-DC converter 130, the internal circuit of the DC-DC converter 130) MCU, etc.) can be protected.

When the breaker 140 operates and the external and battery device 100 are suddenly electrically separated by the breaker 140, the DC-DC converter 130 is primarily a device directly connected to the breaker 140. It can operate in primary protection mode during a preset delay time to consume the remaining current applied to. Alternatively, when the DC-DC converter 130 receives the first power-off request from the switch circuit 120, a preset delay is used to initially consume the remaining current applied to the elements directly connected to the breaker 140. It can operate in primary protection mode for some time.

In addition, to prevent damage to the internal elements of the DC-DC converter 130 even when it is electrically separated from the power supply circuit 110 after the preset delay time has elapsed, the DC-DC converter 130 is operated at a minimum. It can operate in a secondary protection mode that operates only on standby power. The DC-DC converter 130 may also block electrical connection with the battery 150 in the secondary protection mode.

After entry into the secondary protection mode is completed, the DC-DC converter 130 may transmit a second power-off request to the power supply circuit 110. Since the DC-DC converter 130 is already operating in the secondary protection mode, damage may not occur to the internal elements of the DC-DC converter 130 even when electrically separated from the power supply circuit 110.

FIG. 3 is a block diagram showing the configuration of the battery device 100 according to an embodiment along with the flow of data.

Referring to FIG. 3, the DC-DC converter 130 may include an MCU 131. Additionally, the circuit breaker 140 may include an external terminal 310 connected to the outside.

Additionally, referring to FIG. 3 , the battery device 100 may include a BMS 320. The BMS 320 may perform a plurality of functions for managing the battery 150. For example, the BMS 320 can control the temperature, voltage, and current of the battery 150 and perform operations to stabilize the battery 150.

The battery 150 may store energy, and in one embodiment, may store electrical energy in the form of chemical energy, but is not limited to this embodiment.

The power supply circuit 110 can convert and supply the energy stored in the battery 140 so that it can be used as power to the BMS 320, the control IC of the DC-DC converter, the MCU 131, etc.

The breaker 140 may be turned off to prevent an accident when an abnormal current flows between an external power source or an external load and the DC-DC converter 130, but is not limited to this embodiment.

The switch circuit 120 can perform operations such as disconnecting an electric circuit, and can transmit various signals (e.g., a request to cut off the first power supply) to the DC-DC converter 130 and the power supply circuit 110. .

According to one embodiment, the power supply circuit 110 may include a standby IC (standby integrated circuit) that cuts off the power applied to the DC-DC converter in response to the first power cut request and the second power cut request. .

The standby IC is expressed as enable or brown in/out and can perform the function of turning the IC (integrated circuit) on or off when a certain voltage is applied. For example, the standby IC may apply power to the power supply circuit 110 according to a power application request received from the switch circuit 120. In this case, even though the power supply circuit 110 is turned off, the power supply circuit 110 may be turned on according to a signal received from outside the power supply circuit 110. .

FIG. 4 is a block diagram illustrating an example of the power supply circuit 110 according to an embodiment in more detail in relation to other components.

Referring to FIG. 4, when the power supply circuit 110 receives both the first power-off request received from the switch circuit 120 and the second power-off request received from the MCU 131, the DC-DC converter ( 130), the power applied can be blocked. In addition, when the power supply circuit 110 receives both the first power-off request received from the switch circuit 120 and the second power-off request received from the MCU 131, the power supplied to the BMS 320 is You can block it.

The power supply circuit 110 operates the control IC 410 according to the result of the or gate operation in response to the first power-off request received from the switch circuit 120 and the second power-off request received from the MCU 131. By applying a high or low signal to the DC-DC converter 130 and/or BMS 320, the power applied to the DC-DC converter 130 and/or BMS 320 can be controlled.

FIG. 5 is a truth table showing an operation 530 of the power supply circuit 110 according to a first power-off request 510 and a second power-off request 520, according to an embodiment.

Referring to FIG. 5, when both the first power-off request 510 and the second power-off request 520 are off, the power supply circuit 110 operates off, but the first power-off request 510 and If any one of the second power cut requests 520 is on, it can be confirmed that the power supply circuit 110 also operates on.

Accordingly, the power supply circuit 110 actually performs an or gate operation on the first power-off request 510 received from the switch circuit 120 and the second power-off request 520 received from the MCU 131. Depending on the results, the power applied to the DC-DC converter 130 and/or BMS 320 can be controlled.

FIG. 6 is a block diagram illustrating an example of a battery device 100 including a field effect transistor (FET) 620 according to an embodiment.

Referring to FIG. 6, the battery device 100 electrically connects the power supply circuit 110 and the DC-DC converter 130 in response to a power application request received from the switch circuit 120 to provide the power supply circuit 110. It may include a field effect transistor (FET) 620 that applies power to the.

Additionally, the battery device 100 may include a switch 610. The switch 610 may be opened according to the result of the or gate operation for the first power-off request received from the switch circuit 120 and the second power-off request received from the MCU 131.

Additionally, when the breaker 140 is connected while the switch 610 is turned off, the switch 610 may be closed. When the switch 610 is closed, power may be applied to the power supply circuit 110 by the FET 620. Accordingly, the power supply circuit 110 in a power-off state can be turned on and operated by closing the switch 610. In the embodiment of FIG. 6 , unlike the embodiment disclosed in FIG. 3 , the battery device 100 can operate normally even though there is no standby IC.

FIG. 7 is a flowchart explaining how the breaker 140, the switch circuit 120, the DC-DC converter 130, and the power supply circuit 110 operate according to an embodiment.

In step S710, the circuit breaker 140 according to an embodiment transmits a power cutoff signal to the switch circuit 120. The breaker 140 may transmit a power cutoff signal to the switch circuit 120 when there is a cutoff request due to a user input, etc.

In step S720, the switch circuit 120 according to an embodiment transmits a first power-off request to the DC-DC converter 130, and in step S730, the switch circuit 120 according to an embodiment transmits the power supply circuit 110. ) sends the first power-off request to .

The order of steps S720 and S730 may vary. Step S730 may be performed after step S720, step S720 may be performed after step S730, or step S720 and step S730 may be performed simultaneously.

In step S740, the DC-DC converter 130 according to an embodiment may transmit a second power-off request to the power supply circuit 110. Accordingly, when the power supply circuit 110 according to an embodiment receives both the first power cut request and the second power cut request in step S750, the power supplied to the DC-DC converter 130 may be cut off. .

FIG. 8 is a flowchart illustrating a power management method for turning off power to the DC-DC converter 130 according to an embodiment.

In step S810, the switch circuit 120 according to an embodiment receives a power cutoff signal from the circuit breaker 140. The breaker 140 may transmit a power cutoff signal to the switch circuit 120 when there is a cutoff request due to a user input, etc. When the switch circuit 120 receives a power cutoff signal from the circuit breaker 140, it may transmit a first power cutoff request to the power supply circuit 110. Accordingly, in step S820, the power supply circuit 110 receives a first power-off request from the switch circuit 120. The power supply circuit 110 may supply operating power to the DC-DC converter 130.

Additionally, when the switch circuit 120 receives a power-off signal from the circuit breaker 140, it may transmit a first power-off request to the DC-DC converter 130.

In step S830, the power supply circuit 110 according to an embodiment receives a second power-off request from the DC-DC converter 130. When the DC-DC converter 130 receives the first power cutoff request from the switch circuit 120, it switches to the cutoff standby mode in preparation for power cutoff, and when the switch to cutoff standby mode is completed, it sends the second power cutoff request. It can be transmitted to the power supply circuit 110.

In step S840, the power supply circuit 110 according to an embodiment blocks the power applied to the DC-DC converter 130.

When the power supply circuit 110 receives both the first power-off request received from the switch circuit 120 and the second power-off request received from the DC-DC converter 130, the power supply circuit 110 switches to the DC-DC converter 130. Because the applied power is cut off, the power applied from the power supply circuit 110 to the DC-DC converter 130 may be cut off when the transition to the cut-off standby mode is completed. Therefore, even when the power to the circuit breaker 140 is suddenly cut off, the internal circuit of the battery device 100 (e.g., the internal circuit of the DC-DC converter 130, the internal circuit of the DC-DC converter 130) MCU, etc.) can be protected.

Meanwhile, the above-described method can be written as a program that can be executed on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium. Additionally, the data structure used in the above-described method can be recorded on a computer-readable recording medium through various means. The computer-readable recording media includes storage media such as magnetic storage media (e.g., ROM, RAM, USB, floppy disk, hard disk, etc.) and optical read media (e.g., CD-ROM, DVD, etc.) do.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will be able to understand it. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

10: solar panel 20: inverter
30: Battery pack 40: Power grid (Grid)
50: Load 100: Battery device
110: power supply circuit 120: switch circuit
130: DC-DC converter 140: Circuit breaker
150: battery
310: external terminal 320: BMS
131:MCU
610: switch 620: FET

Claims (10)

battery;
A DC-DC converter connected to the battery;
a power supply circuit that receives and supplies operating power of the DC-DC converter from the battery;
A circuit breaker that cuts off the power connected to the outside of the DC-DC converter; and
It includes a switch circuit that receives a power cut-off signal from the breaker,
When the power supply circuit receives both a first power-off request received from the switch circuit and a second power-off request received from the DC-DC converter, the power supply circuit cuts off the operating power supplied to the DC-DC converter,
The power cut signal is,
A battery device that is a signal that cuts off the operating power supplied to the DC-DC converter from the power supply circuit.
According to claim 1,
The switch circuit transmits the first power-off request to the power supply circuit and the DC-DC converter when the power-off signal is received.
According to claim 2,
When the DC-DC converter receives the first power-off request, it switches to a cut-off standby mode in preparation for operating power cut-off, and when the switch to the cut-off standby mode is completed, it sends the second power-off request to the power supply circuit. Transmitting to a battery device.
delete According to claim 1,
The power supply circuit includes a standby IC (standby integrated circuit) that blocks operating power applied to the DC-DC converter in response to the first power-off request and the second power-off request.
According to claim 5,
The standby IC applies power to the power supply circuit according to a power application request received from the switch circuit.
delete A switch circuit receiving a power cut-off signal from a circuit breaker;
A power supply circuit that supplies operating power to a DC-DC converter receives a first power-off request from the switch circuit;
receiving, by the power supply circuit, a second power-off request from the DC-DC converter; and
A step of cutting off the operating power supplied by the power supply circuit to the DC-DC converter,
The DC-DC converter is connected to a battery,
The breaker blocks the power supply to the DC-DC converter from the outside,
The power supply circuit receives operating power of the DC-DC converter from the battery and supplies it,
The power cut signal is,
A power management method, which is a signal that cuts off the operating power supplied to the DC-DC converter from the power supply circuit.
According to claim 8,
When receiving the first power-off request, switching the DC-DC converter to a cut-off standby mode in preparation for operating power cut-off; and
A power management method further comprising the step of the DC-DC converter transmitting the second power-off request to the power supply circuit when the transition to the cut-off standby mode is completed.
A computer-readable recording medium that records a program for executing the method of claim 8 on a computer.

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