KR101590836B1 - Energy storage system for arc diagnosis and method thereof - Google Patents

Energy storage system for arc diagnosis and method thereof Download PDF

Info

Publication number
KR101590836B1
KR101590836B1 KR1020150091046A KR20150091046A KR101590836B1 KR 101590836 B1 KR101590836 B1 KR 101590836B1 KR 1020150091046 A KR1020150091046 A KR 1020150091046A KR 20150091046 A KR20150091046 A KR 20150091046A KR 101590836 B1 KR101590836 B1 KR 101590836B1
Authority
KR
South Korea
Prior art keywords
relay
arc
battery
pcs
storage system
Prior art date
Application number
KR1020150091046A
Other languages
Korean (ko)
Inventor
박재동
김형준
Original Assignee
(주)에너지와공조
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)에너지와공조 filed Critical (주)에너지와공조
Priority to KR1020150091046A priority Critical patent/KR101590836B1/en
Application granted granted Critical
Publication of KR101590836B1 publication Critical patent/KR101590836B1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/3606—
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

Abstract

The present invention relates to an energy storage system for arc diagnosis and a method of the same. The energy system is connected to a power condition system (PCS) which supplies power to a load and which is linked to a grid. The energy storage system comprises: a battery; a sensing unit measuring voltage of the battery or current; a battery management system (BMS) sensing whether an arc occurs based on a voltage signal or a current signal outputted from the sensing unit, and generating a control signal when an arc occurs; and a relay for connecting the battery to the PCS or detaching the battery from the PCS by performing opening/closing operation depending on the BMS control signal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy storage system capable of diagnosing an arc,

The present invention relates to an energy storage system capable of diagnosing an arc and a method thereof, and more particularly, to an energy storage system capable of diagnosing an arc in which an arc is generated by analyzing a voltage and a current measured in a battery, ≪ / RTI >

The energy management system includes a power conversion system (hereinafter referred to as PCS) and an energy storage system (ESS) that supply power to the load in conjunction with the system. The ESS contains a battery, and a relay is installed between the battery and the PCS. The connection or opening of the battery and the PCS is performed by the relay. The purpose of using relays is to ensure complete electrical insulation between the energy storage system and the rest of the system, prevent serious secondary accidents such as electrical shocks and fires caused by high voltage in the event of a primary accident, .

On the other hand, when the ESS is not used, the battery and the PCS are separated using the relay for the safety of the battery and the PCS and the user.

However, when the battery and the PCS are separated from each other while the current is flowing, there arises a problem that an arc is generated due to the characteristics of using the DC or a shutoff is not performed. There is a problem in that a problem occurs.

In addition, the ESS is made up of a number of battery cells and DC-using lines. Depending on the elapsed time, the screwing of the connecting parts may become loose or disconnection may occur, A corona discharge is generated, which causes a problem of fire.

Therefore, in order to solve the problem caused by the use of the ESS, development of a system for diagnosing arcing and for interrupting or connecting current is required.

Korean Patent No. 1113508, entitled " PV PCS Integrated Bidirectional Battery Charging / Discharging System and Method "

SUMMARY OF THE INVENTION It is an object of the present invention to provide an energy storage system and method capable of detecting an arc in an ESS and determining an arc occurrence or an arc occurrence in a system to prevent a fire.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

According to an aspect of the present invention, there is provided an energy storage system connected with a power condition system (PCS) for supplying power to a load in conjunction with a system, the energy storage system comprising: a battery; a sensor unit for measuring a voltage or current of the battery; A BMS (Battery Management System) for determining whether or not an arc is generated based on the measured current or voltage and generating a control signal when an arc occurs, an opening / closing operation according to a control signal of the BMS, An arc diagnostic energy storage system is provided that includes a relay that connects or disconnects the PCS.

The BMS may determine that the relay is welded when an arc occurs when the relay is open, and may transmit an inverter off control signal to the PCS.

The BMS determines that an arc has occurred in the energy storage system when an arc occurs when the relay is in a close state, transmits an inverter off control signal to the PCS, A control signal may be generated to open the relay.

The sensor unit may include a voltage sensor for measuring a voltage of the battery, and a current sensor for measuring a current of the battery.

According to another aspect of the present invention, there is provided a method of controlling a battery, comprising: measuring a voltage and a current of a battery; analyzing the measured voltage and current to determine whether or not an arc is generated; Determining that an arc has occurred in the storage system when the relay is in a closed state and determining that relay fusion has occurred when the relay is not in a closed state; A diagnostic method is provided.

If it is determined that the relay fusion has occurred, the inverter of the PCS can be turned off.

If it is determined that an arc has occurred in the energy storage system, the inverter of the PCS may be turned off and the relay may be opened.

According to another aspect of the present invention, it is determined whether an arc is generated by analyzing the voltage and current measured in the battery, and when an arc occurs when the relay is in a close state, The inverter turns off the control signal to the PCS and opens the relay. If an arc occurs when the relay is not in the closed state, it determines that the relay is fused and outputs an inverter off control signal to the PCS There is provided an arc diagnostic energy management system comprising an energy storage system for transmitting and receiving an inverter off control signal, and a PCS for turning off the inverter when an inverter off control signal is received from the energy storage system.

According to the present invention, it is possible to detect an arc in the ESS, judge whether a relay is fused or whether an arc is generated in the system to prevent a fire.

The effects of the present invention are not limited to the above-mentioned effects, and various effects can be included within the scope of what is well known to a person skilled in the art from the following description.

FIG. 1 is a diagram illustrating a configuration of an energy management system capable of diagnosing an arc according to an embodiment of the present invention.
FIG. 2 is a view schematically showing a configuration of a storage system capable of diagnosing an arc according to an embodiment of the present invention.
3 and 4 are views for explaining an arc according to an embodiment of the present invention.
5 is a flow diagram illustrating a method for a storage system to diagnose and process an arc in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a storage system capable of diagnosing an arc and a method thereof according to the present invention will be described in detail with reference to the accompanying drawings. The embodiments are provided so that those skilled in the art can easily understand the technical spirit of the present invention, and thus the present invention is not limited thereto. In addition, the matters described in the attached drawings may be different from those actually implemented by the schematic drawings to easily describe the embodiments of the present invention.

In the meantime, each constituent unit described below is only an example for implementing the present invention. Thus, in other implementations of the present invention, other components may be used without departing from the spirit and scope of the present invention. Also, the expression " comprising " is intended to merely denote that such elements are present as an expression of " open ", and should not be understood to exclude additional elements.

FIG. 1 is a diagram illustrating a configuration of an energy management system capable of diagnosing an arc according to an embodiment of the present invention.

Referring to FIG. 1, an energy management system capable of diagnosing an arc includes a PCS (Power Conditioning System) 110 and an energy storage system 120, and connects the power generation system 130 and the system 140 to each other. And supplies power to the load 150. [

The PCS 110 receives power generated from the power generation system 130 and transfers it to the system 140, stores it in the energy storage system 120, or supplies it to the load 150. Here, the generated power may be DC power or AC power.

The PCS 110 stores power from the system and provides power to the utility grid to reduce peak loads or power outages. The PCS 110 may also transfer power stored in the energy storage system 120 to the system 140 or store the power supplied from the system 140 in the energy storage system 120. [

The PCS 110 may provide power conversion for storing the generated power in the energy storage system 120, power conversion for supplying the system 140 or the load 150, power of the system 140 to the energy storage system 120, And may perform a power conversion function for supplying power stored in the energy storage system 120 to the system 140 or the load 150. [ The PCS 110 may also monitor the state of the energy storage system 120, the system 140 and the load 150 to distribute the power generated from the power generation system 130 or the power supplied from the system 140 .

The energy storage system 120 is a mass storage device that stores power supplied from the PCS 110. Here, the supplied power is the power converted from the power generated from the power generation system 130, or the power converted from the commercial power supplied from the system 140. The power stored in the storage system 120 may be supplied to the system 140 and supplied to the load 150 under the control of the PCS 110. [

The energy storage system 120 includes a battery, a sensor unit, a relay, and a battery management system (BMS). Here, the relay connects the energy storage system 120 and the PCS 110 and separates the battery and the PCS 110 for battery and PCS 110 and user safety when the energy storage system 120 is not in use. do.

The energy storage system 120 analyzes the current or voltage measured in the wiring connecting the battery and the PCS 110 to determine an arc occurrence. It is possible to determine whether or not the PCS internal arc is generated.

A detailed description of the energy storage system 120 will be given with reference to FIG.

The power generation system 130 is a system that generates electric energy using an energy source. The power generation system 130 generates electrical energy and outputs it to the PCS 100. The power generation system 130 may include a solar power generation system, a wind power generation system, a tidal power generation system, and a power generation system that generates electric energy using renewable energy such as solar heat, geothermal power, .

The system 140 includes a power plant, a substation, a transmission line, and the like. System 240 provides power to PCS 100 or load 150 and receives power supplied from PCS 100 when in a steady state. When the system 140 is in an abnormal state, the power supply from the system 140 to the PCS 100 or the load 150 is stopped and the power supply from the PCS 100 to the system 140 is also stopped.

The load 150 consumes power output from the energy storage system 120 or the system 140 and may be, for example, a home, a factory, or the like.

FIG. 2 is a view schematically showing a configuration of an energy storage system capable of diagnosing an arc according to an embodiment of the present invention, and FIGS. 3 and 4 are views for explaining an arc according to an embodiment of the present invention.

2, an arc diagnostic energy storage system 120 includes a battery 122, a sensor unit 124, a BMS 126, and a relay 128.

The battery 122 receives and stores electric power generated by the power generation system or power of the system, and supplies power stored in the load or the system. The battery 122 may include at least one battery cell, and each battery cell may include a plurality of bare cells. The battery 122 may be implemented in various types of battery cells and may be a nickel-cadmium battery, a lead-acid battery, a nickel metal hydride battery (NiMH), a lithium- a lithium ion battery, a lithium polymer battery, and the like. The battery 122 can determine the number of batteries according to the power capacity, design conditions, and the like required in the energy storage system. For example, when the power consumption of the load is large, a plurality of batteries 122 may be provided. In the case where the power consumption of the load is small, only one battery 122 may be provided.

The sensor unit 124 includes a voltage sensor for measuring the voltage of the battery, and a current sensor for measuring the current of the battery. The current sensor may be a sensor that measures the current flowing along the wiring connecting the battery 122 and the PCS. Specifically, the current sensor is disposed around the wiring and can measure the magnetic field provided by the current flowing in the wiring. The current sensor may be, for example, a Hall sensor. The current signal measured by the current sensor may be provided to the BMS 126. The current signal may include information about an arc occurring in the battery 122. [ The voltage sensor can measure the voltage of the wiring. The voltage of the wiring measured by the voltage sensor may be provided to the BMS 126.

The sensor unit 124 transmits the measured voltage through the voltage sensor and the measured current through the current sensor to the BMS 126.

The BMS 126 determines whether an arc is generated based on the current or voltage measured by the sensor unit 124, and generates a control signal when an arc occurs. At this time, when an arc occurs when the relay 128 is open (open), the BMS 126 determines that the relay is welded and generates an inverter off control signal to transmit to the PCS. The PCS, which has received the inverter off control signal, turns off the inverter to disconnect the battery 122 and the PCS, thereby blocking the abnormal current from flowing to the battery 122. The BMS 126 determines that an arc has occurred in the storage system when an arc occurs when the relay 128 is in a close state and transmits an inverter off control signal to the PCS, And generates an open control signal. The PCS that has received the inverter off control signal turns off the inverter and the relay 128 is opened in accordance with the relay open control signal so that the battery 122 and the PCS are separated from each other,

In more detail, the BMS 126 receives the current signal output from the sensor unit 124, detects a high-frequency component due to the arc, and outputs an arc signal , A large arc exceeding a predetermined reference signal is detected, and a control signal is output. That is, the BMS 126 converts a voltage signal having the same phase as the current signal output from the sensor unit 124 to a frequency component, extracts remaining arc components excluding the fundamental frequency component of the current signal, The number of pulses input per cycle and the frequency of pulses are used to recognize arcing. At this time, when an arc occurs when the relay 128 is open, the BMS 126 determines that the relay is welded. When the arc is generated when the relay 128 is closed, an arc is generated in the storage system .

An arc is a discharge phenomenon of a flash which is generated from an insulator and accompanied by a burnout of an electrode. The generation of an arc varies from an instant to a long period of time. The magnitude of the energization current and the arc duration Element. Arc flaws can cause temperatures above 1,000 degrees Celsius, even at small currents, so the firing point area of a typical PVC wire insulator is around 250-450 degrees Celsius, resulting in direct fire and deterioration of the insulation.

The types of arc are largely divided into parallel arc, ground arc, and serial arc. Parallel arcs are also known as line-to-line arcs, and power cord lines that continuously and repetitively bend like cord lines wound on the hair dryer's outlet connection or storage of the toaster, and the damaged power source It is likely to occur in code. A ground arc is a case where the insulation of a wire insulator is weakened by external influences such as nails and it is caused by a surge voltage, even if an insulation accident does not occur immediately. A series arc connects a wire and an outlet It occurs mainly in the connection part of an outlet where excessive force is applied to the bolt used for connection in the process of fixing, and when the insulator deteriorates due to contact failure, it is enlarged to the parallel arc.

Arc flaws are inevitable part in the use of electric equipment and electric equipment. Electric fires due to arc welding are stealthy, so sudden fire occurs in electric equipment and devices that are used everyday. It may be different, but it will appear someday, and there are characteristics that occur in the old facilities as well as the new facilities.

The arc will be described with reference to FIGS. 3 and 4. FIG.

3 shows a typical waveform when an arc is generated. Referring to FIG. 3, when an arc is not generated, the current and the voltage have pure DC components, but when an arc is generated, they have frequency components of several tens kHz or more. Therefore, the BMS 126 can detect the arc if it finds a component of several tens kHz or more while following the component of 1 kHz or less from the current signal. According to an embodiment of the present invention, the BMS 126 passes a current signal including arc information through a low pass filter, extracts a component of 1 kHz or less, compares a low frequency component with a current signal, It is possible to determine whether an arc has occurred in the energy storage system or fusion occurred in the relay based on the detected arc signal.

4 (a) shows a steady-state waveform. This is the operating characteristic of the inverter and it has frequency components below 1kHz.

(b) shows the waveform when an arc is generated. When an arc occurs, the inverter has a waveform with a high frequency of several kHz to several tens of kHz.

The BMS 126 is connected to the battery 122 and controls the charge / discharge operation of the battery 122 under the control of the PCS 110. [ In addition, the BMS 126 may perform an overcharge protection function, an over discharge protection function, an over current protection function, an overheat protection function, a cell balancing function, and the like in order to protect the battery 122. To this end, the BMS 126 detects the voltage, current, and temperature of the battery 122 to calculate a State of Charge (SOC) and a State of Health (SOH) And can monitor the remaining amount of power and life span.

The BMS 126 controls the microcomputer and the microcomputer to determine the overcharge, overcharge, overcurrent, cell balancing, SOC, and SOH according to the sensing function of detecting the voltage, current, And may include a protection circuit that performs charge / discharge inhibition, fuse termination, and cooling according to a signal. The BMS 126 is included in the storage system 120 and is configured separately from the battery 122. It is needless to say that the BMS 126 and the battery 122 may be formed as a battery pack.

The relay 128 connects or disconnects the battery 122 and the PCS and separates the battery 122 and the PCS for the safety of the battery 122 and the PCS and the user when the energy storage system 120 is not in use, Thereby blocking current from flowing to the battery 122. [

The relay 128 performs an opening / closing operation in accordance with a control signal of the BMS 126. That is, the relay 128 performs an open operation according to a relay open control signal generated in the BMS 126 to separate the battery 122 and the PCS 110 from each other.

5 is a flow diagram illustrating a method for an energy storage system to diagnose and process an arc in accordance with an embodiment of the present invention.

Referring to FIG. 5, the BMS measures the voltage and current of the battery (S502), analyzes the measured voltage and current (S504), and determines whether or not an arc is generated (S506). That is, the BMS measures the current signal and the voltage signal through the sensor unit connected to the battery. Then, the BMS converts a voltage signal having the same phase as the measured current signal into a frequency component, extracts remaining arc components excluding the fundamental frequency component of the current signal, and calculates the number of pulses input per cycle of the arc component The width of the pulse recognizes the occurrence of an arc.

If it is determined in step S506 that an arc has occurred, the BMS determines whether the relay is in a close state (S508).

If it is determined in step S508 that the relay is closed, the BMS determines that an arc has occurred in the storage system in step S510, turns off the inverter of the PCS in step S512, and opens the relay in step S514. If the relay is in the closed state, it means that current flows between the battery and the PCS. If the relay is opened when the current is flowing, the inverter may be turned off because fusion may occur by itself, And then open the relay.

If it is determined in step S508 that the relay is not in the closed state, the BMS determines that relay fusion has occurred (S516), and turns off the inverter of the PCS (S518). That is, the energy storage system is connected by a number of DC lines, and arcing of DC means that the risk factor is now generated, so the inverter must be shut down.

Through the above process, the BMS can determine whether an arc has occurred in the energy storage system or a relay fusion has occurred. Basically, if an arc occurs when the relay is open, the relay is welded. If the arc is generated when the relay is closed, it can be determined that an arc has occurred in the ESS.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. 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.

110: PCS 120: Energy storage system
122: battery 124:
126: BMS 128: Relay

Claims (8)

delete 1. An energy storage system connected to a power condition system (PCS) for supplying electric power to a load in association with a system,
battery;
A sensor unit for measuring a voltage or current of the battery;
A BMS (Battery Management System) for determining whether an arc is generated based on the current or voltage measured by the sensor unit and generating a control signal when an arc occurs; And
A relay for connecting / disconnecting the battery and the PCS by performing an opening / closing operation according to the control signal of the BMS;
Lt; / RTI >
Wherein the BMS determines that the relay is welded when an arc occurs when the relay is open and transmits an inverter off control signal to the PCS.
1. An energy storage system connected to a power condition system (PCS) for supplying electric power to a load in association with a system,
battery;
A sensor unit for measuring a voltage or current of the battery;
A BMS (Battery Management System) for determining whether an arc is generated based on the current or voltage measured by the sensor unit and generating a control signal when an arc occurs; And
A relay for connecting / disconnecting the battery and the PCS by performing an opening / closing operation according to the control signal of the BMS;
Lt; / RTI >
The BMS determines that an arc has occurred in the energy storage system when an arc occurs when the relay is in a close state, transmits an inverter off control signal to the PCS, and outputs a relay open control signal And the relay is opened. ≪ RTI ID = 0.0 > [0002] < / RTI >
The method according to claim 2 or 3,
Wherein the sensor unit comprises: a voltage sensor for measuring a voltage of the battery; And
And a current sensor for measuring a current of the battery.
Measuring voltage and current of the battery;
Analyzing the measured voltage and current to determine whether an arc has occurred;
Determining whether the relay is in a close state when an arc occurs as a result of the determination; And
Determining that an arc has occurred in the energy storage system when the relay is in a closed state and determining that relay fusion is occurring when the relay is not in a closed state;
The method comprising the steps of:
6. The method of claim 5,
And turning off the inverter of the PCS when it is determined that the relay fusion has occurred.
6. The method of claim 5,
Wherein when the arc is determined to have arisen in the energy storage system, the relay of the energy storage system is opened after the inverter of the PCS is turned off.
If an arc occurs when the relay is in a close state, it is determined that an arc is generated in the energy storage system, and the inverter turns off the control signal An energy storage system for transmitting an inverter off control signal to the PCS when the relay is open and determining that the relay is welded when an arc occurs when the relay is not closed; And
A PCS for turning off the inverter when an inverter off control signal is received from the energy storage system;
The energy management system comprising:
KR1020150091046A 2015-06-26 2015-06-26 Energy storage system for arc diagnosis and method thereof KR101590836B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150091046A KR101590836B1 (en) 2015-06-26 2015-06-26 Energy storage system for arc diagnosis and method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150091046A KR101590836B1 (en) 2015-06-26 2015-06-26 Energy storage system for arc diagnosis and method thereof

Publications (1)

Publication Number Publication Date
KR101590836B1 true KR101590836B1 (en) 2016-02-02

Family

ID=55354693

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150091046A KR101590836B1 (en) 2015-06-26 2015-06-26 Energy storage system for arc diagnosis and method thereof

Country Status (1)

Country Link
KR (1) KR101590836B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102420756B1 (en) * 2022-04-13 2022-07-14 주식회사 피라인모터스 The apparatus for relay monitoring of battery pack
KR102488790B1 (en) * 2022-09-28 2023-01-18 한국에너지솔루션 주식회사 ESS arc fault detection device and its algorithm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102420756B1 (en) * 2022-04-13 2022-07-14 주식회사 피라인모터스 The apparatus for relay monitoring of battery pack
KR102488790B1 (en) * 2022-09-28 2023-01-18 한국에너지솔루션 주식회사 ESS arc fault detection device and its algorithm

Similar Documents

Publication Publication Date Title
CA2883094C (en) Battery energy storage system with arc flash protection, energy conversion system and protection method
US9627720B2 (en) Battery pack, apparatus including battery pack, and method of managing battery pack
EP3183791B1 (en) Electric storage system
US9300016B2 (en) Battery system and energy storage system
CN101504996B (en) Charging apparatus and charging method
CN105429226B (en) Large capacity charge-discharge battery manages system
US20150194707A1 (en) Battery pack, energy storage system including the battery pack, and method of operating the battery pack
US9829529B2 (en) Power supply apparatus
WO2020107838A1 (en) Instantaneous water heater with energy storage and hot-water system
US7859226B2 (en) Method and device for safety protection of secondary battery
EP2866294A1 (en) Battery pack, energy storage system including battery pack, and method of charging battery pack
KR101941184B1 (en) Arc detecting apparatus and solar power system and ESS having the same
TWI547058B (en) Charger, battery module, method and system for identifying and monitoring a charger
KR101064631B1 (en) Automatic electric power distribution system using uninterruptible power supply
CN106972583A (en) A kind of battery set charge/discharge control system
US10106036B2 (en) Protecting a power supply including a plurality of batteries in parallel against an external short-circuit
CN1130789C (en) Apparatus for simulating high battery temp. for rechargeable battery systems
CN201000908Y (en) Secondary battery having current voltage protection unit
CN106787045B (en) Direct current power supply system and control method thereof
KR20140140355A (en) Battery management system and driving method thereof
KR101590836B1 (en) Energy storage system for arc diagnosis and method thereof
EP2782201A1 (en) Storage battery unit
CN209658959U (en) Series-connected cell group power module with balance protection
CN107037376A (en) A kind of batteries charging and discharging currents monitoring system and monitoring method
KR20230060662A (en) System and method for stability testing lithium battery of energy storage system

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20191115

Year of fee payment: 5