KR20160113425A - Over temperature protection device for energy storage system and method - Google Patents

Abstract

Disclosed is a high temperature blocking device in an energy storing system, which comprises: an energy storing member including at least one battery; and a high temperature blocking member detecting a temperature of the energy storing member and compulsively tripping the energy storing member if the temperature reaches a predetermined high temperature. The high temperature blocking member further comprises: a temperature regulation part outputting a controlling signal if the temperature of the energy storing member, detected from a high temperature detection sensor sensing the temperature of the energy storing member, reaches a predetermined high temperature; a clock signal generation part outputting clock of a short pulse if the controlling signal is applied from the temperature regulation part; and a power trip part compulsively tripping the energy storing member by the clock of the short pulse from the clock signal generation part.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an overtemperature protection device for an energy storage system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy storage system, and more particularly, to an apparatus and method for preventing overheating of an energy storage system that detects and blocks an overheat which may cause malfunction of an energy storage system.

With the recent depletion of existing energy sources such as oil and coal, interest in alternative energy to replace them is increasing. Accordingly, interest in renewable energy using sunlight, wind power, and small hydro power is increasing. Therefore, in recent years, it is necessary to supply energy or store energy by using renewable energy, and accordingly, an energy storage device for storing energy is used.

On the other hand, when the energy storage device is installed outside, the temperature of the battery pack in the energy storage device also drops below zero when the external temperature falls below zero, which makes it difficult to perform normal operation.

Accordingly, in the prior art, a technique for maintaining the temperature of the energy storage device at a proper temperature by providing a fan that operates for heat exchange in a battery pack disposed in the case in the energy storage device has been proposed.

However, such a conventional energy storage device simply includes a fan in the battery pack to dissipate the heat inside, and the temperature of the energy storage device rapidly rises due to the surrounding environment or other factors despite the operation of the fan. .

That is, when the conventional energy storage device is installed in a housing such as a container, the heat generated during the charging and discharging of the battery accumulates, which may adversely affect the lifetime of the battery or may be increased to an excessive temperature which may cause an explosion. In addition, the conventional energy storage device can explode because the charge and discharge of the battery can not be blocked when a fire occurs inside and outside the enclosure, so that the fire can spread.

However, since the conventional energy storage device as described above can only operate the heat exchange means such as a fan and can perform simple charge / discharge control through a device formed integrally with the battery, such as a BMS, the battery can not be protected against internal and external risk factors There is a problem in that it is impossible to properly cope with the risks such as over-temperature and harmfulness.

Korean Patent Publication No. 10-2011-0072911 (June 29, 2011) Korean Patent Registration No. 10-1409999 (Jun. 19, 2013)

Accordingly, it is a first object of the present invention to solve the above problems and to solve the above problems in a first aspect of the present invention to provide an energy storage system capable of shortening the life of a battery and forcibly tripping an energy storage system when an over- And an overheat cut-off device of an energy storage system installed as a separate independent structure.

A second object of the present invention is to provide an energy storage system capable of shutting off a power supply line of an energy storage system when an overheating due to accumulated heat or fire in an energy storage system is detected and releasing a trip (TRIP) Thereby preventing overheating of the energy storage system.

According to an aspect of the present invention, there is provided an energy storage device comprising: an energy storage member having at least one battery; and an overheat shielding member for sensing a temperature of the energy storage member and forcibly tripping the energy storage member, A temperature control unit for outputting a control signal when the temperature of the energy storage member sensed by the overheat sensing sensor corresponds to a set excessive temperature; And a power trip unit for forcibly tripping the energy storage member by a clock CLOCK of a short pulse from the clock signal generation unit when the control signal is applied, Thereby providing an overheating device of the energy storage system.

According to another aspect of the present invention, there is provided a method of controlling an energy storage device, the method comprising: sensing a temperature of an energy storage member having at least one battery; sensing a temperature of the energy storage member And a step of forcibly tripping the energy storage member when the temperature of the energy storage member is determined to be a set excessive temperature in the over temperature determination step, There is provided a method of overheating an energy storage system that applies a short pulse of a clock to a power trip unit installed in a power supply line to forcibly trip the energy storage member without delay time.

 The above-described overheating device of the energy storage system of the present invention detects the overheating due to heat accumulated in the inside and the outside of the energy storage system and can cut off the charging / discharging power of the battery, thereby preventing the battery from being shortened in life or malfunction There is an effect that reliability is improved.

In addition, the present invention can be applied to a battery management system (BMS) that manages a battery having a battery module in which one or more battery cells are combined, and a battery management system The charge and discharge of the battery can be controlled, thereby preventing the spread of fire.

1 is a block diagram showing an overheat cut-off device of an energy storage system according to the present invention.
2 is a flowchart illustrating a method of shutting off the overheating of the energy storage system according to the present invention.
FIG. 3 is a flowchart showing the driving step of the overheat blocking member in the overheat cut-off method of the energy storage system according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an overheat interrupter and method of an energy storage system according to the present invention will be described in detail with reference to the accompanying drawings.

First, the terms used below will be explained for the purpose of explanation of the present invention.

ENERGY STORAGE SYSTEM (ESS) is a system that supplies electric power to devices or systems that require power after storing electric power produced by thermal, hydro, nuclear, solar, wind, tidal, cogeneration. For this purpose, the energy storage system is composed of a battery using a secondary battery such as a LiB battery, a NaS battery, an RFB, and a super capacitor, and a non-battery storage system.

The apparatus and method for overheating the energy storage system according to the present invention will now be described by way of example with reference to a lithium battery (LiB). However, the present invention is not limited thereto. It can also be applied to a non-battery storage method using a flywheel that stores energy by motion.

The energy storage system using a battery includes a battery management system (BMS), a power management system (PCS), and a power management system (PMS) for efficiently controlling charging and discharging.

BACKGROUND ART [0002] A battery management system (BMS) (collectively referred to as BMS) monitors and controls a charging and discharging state of a battery to correct a state of charge (SOC) of each battery cell, Means a device that performs cell balancing to maintain a constant voltage.

The battery may be configured by assembling a plurality of battery packs in which a plurality of battery cells are connected or a plurality of battery packs in which a plurality of racks are assembled. In the following description, a plurality of battery cells are briefly described as assembled batteries, but it is obvious that the present invention is also applicable to batteries classified as the above units.

A power conversion system (PCS) is a power conversion device that converts an external power source to a power source suitable for a battery, or converts an output power of a battery into a power source suitable for an external device to be connected, AC / DC converter and DC / AC converter.

The PMS (Power Management System) collects the data on the power generation data of the external system, the power consumption of the load, and the operation information of the BMS and the PC, and controls the energy storage system as a whole by linking with the power system.

The overtemperature of the energy storage system used in the following description refers to the energy stored in the battery pack of the battery during charging and discharging or the accumulation of heat in the battery enclosure (for example, a housing space such as a housing or a container, And the temperature at which the energy storage system and / or the energy storage system can be detected at the time of fire inside and outside the enclosed and / or received housing.

1 is a block diagram illustrating an energy storage system equipped with an overheat cut-off device of an energy storage system according to the present invention.

1, the present invention includes an energy storage member 200 having a battery 210, a BMS 220, a PCS 240, and a PMS 230, An overheat shielding member 100 for sensing the temperature of the energy storage member 200 to trip the energy storage member 200, an external system 300 for supplying power to the energy storage member 200, And a power connector 400 for outputting power charged in the battery 200.

The over-temperature shut-off member 100 includes an over-temperature sensor 150 for detecting an over-temperature of the energy storage member 200, a power trip unit 130 for tripping the energy storage member 200 to shut off the power supply, A temperature controller 110 for receiving the overheat sensing signal of the overheat sensor 150 and controlling the clock signal generator 120, And a power supply unit 140 which is charged with the power supplied from the battery 210 of the power supply unit 200 and supplies the driving power of the temperature control unit 110 and the clock signal generation unit 120 and the power trip unit 130.

The over-temperature detection sensor 150 measures the temperature of the energy storage member 200 and applies the measured temperature to the temperature control unit 110. Here, it is preferable that at least one of the over-temperature detection sensors 150 is installed in the battery 210 in a wire form. Here, the battery 210 is composed of a combined rack of one or more battery cells or a battery pack in which a plurality of racks are assembled. The energy storage member 200 may be configured by electrically connecting one or more batteries 210, but is not limited thereto.

The power supply unit 140 charges the power output from the battery 210 and supplies power to the temperature control unit 110, the clock signal generation unit 120, and the power trip unit 130. Here, the power supply unit 140 applies a switch mode power supply (SMPS) to supply power to the over-temperature shut-off member 100 for a period of time during which the power supply is re-supplied even if the power supply from the battery 210 is interrupted desirable.

The power trip unit 130 cuts off the power line connected between the external system 300 and the power source connector 400 in the energy storage member 200. The power trip unit 130 is driven by a clock signal applied from the clock signal generation unit 120 to instantaneously shut off the energy storage member 200 without delay time. 1, the power trip unit 130 may be installed in a power line between the energy storage member 200 and the external system 300, but may be installed between the battery 210 and the PCS 240 It is possible.

For example, when the energy storage member 200 is installed inside a container such as a container, the power trip unit 130 may be configured to prevent the battery 210 And the PCS 240, as shown in FIG.

That is, the position of the power trip unit 130 can be determined by the designer or the operator, and is described below as an example in which the energy storage member 200 is installed between the energy storage member 200 and the external system 300. However, It is not limited.

The power trip unit 130 is a voltage driven apparatus that is forcibly tripped by a voltage applied as, for example, an MCCB (MOLD CASE CIRCUIT BREAKER). The power trip unit 130 generates a short time For example, within one second) to forcefully trip the energy storage member 200 without delay time.

The clock signal generator 120 is driven by the power supplied from the power supply unit 140 and outputs a set signal to the power trip unit 130 when a control signal is applied from the temperature controller 110. As described above, the power trip unit 130 is driven by a short pulse for fast tripping. Accordingly, the clock signal generating unit 120 generates and outputs a pulse having a level matching the driving condition of the power trip unit 130.

The temperature controller 110 receives the temperature detection signal of the overheat sensor 150 and controls the clock signal generator 120 to shut off the energy storage member 200 when the temperature of the energy storage system reaches the set excessive temperature. .

When the temperature of the energy storage member 200 reaches the predetermined normal temperature from the over-temperature sensor 150, the temperature controller 110 drives the clock signal generator 120 to restart the power supply trip unit 130 It is desirable to release the power supply interruption of the energy storage member 200.

That is, in the present invention, the overheat shut-off member 100 forcibly trips the energy storage member 200 when an over-temperature that may cause a malfunction of the energy storage member 200 is sensed.

In addition, according to the present invention, the charging rate of the battery 210 may be checked in the energy storage member 200 to block the power line connected to the PC from the battery 210. This is because the overheat shut-off member 100 senses the overtemperature of the energy storage member 200 as a whole and forcibly trips the energy storage member 200. As a result, Is driven separately from the member (100).

That is, in the present invention, the overheat shut-off member 100 and the energy storage member 200 operate as mutually independent configurations.

The energy storage member 200 senses the voltage, temperature, and current of the battery 210 to correct the cell balance and SOC (state of charge) of the battery 210. The voltage and current of the battery 210, And an alarm is outputted by self-diagnosis of abnormality of each sensor which detects the temperature.

The present invention includes the above-mentioned overheat blocking member 100 and the energy storing member 200. Hereinafter, an overheating method of the energy storing system will be described in detail with reference to the accompanying flowcharts.

2 is a flowchart illustrating a method of shutting off the overheating of the energy storage system according to the present invention.

Referring to FIG. 2, the method of isolating overheating of the energy storage system according to the present invention includes a reset step S100 for turning off and then driving the energy storage system again, a diagnosis step S100 for diagnosing abnormality of each sensor after the reset step S100, A step S200 of operating the energy storage member 200 for correcting the cell balancing and charging state of the energy storage member 200 and a driving step S200 of forcing the energy storage member 200 to trip when the overheat is sensed in the energy storage member 200 (S300).

The driving step S200 of the energy storage member includes a self diagnosis mode step of self-diagnosing the abnormality of the sensor for sensing voltage, current and temperature after the reset step S100, And a correction mode step of performing correction and cell balancing.

The self-diagnosis mode step is a step of restarting the system after the system is turned off in the reset step (S100) and simultaneously driving each sensor in the BMS (220) to determine whether there is an abnormality.

The correction mode step receives the detection signals of a temperature sensor (not shown), a voltage sensor (not shown), and a current sensor (not shown) after initializing each system after the self-diagnosis mode step, And compensating the cell balancing and charging state between the cells.

The driving step S300 of the over-temperature shut-off member 100 will be described with reference to Fig.

FIG. 3 is a flowchart showing driving steps of the overheat shut-off member 100 in the overheat cut-off method of the energy storage system according to the present invention.

3, the driving step S300 of the overheat blocking member 100 includes a temperature sensing step S310 for sensing the temperature of the energy storage member 200, a step S310 for sensing the temperature of the energy storage member 200, A step S330 of forcibly tripping the energy storage member 200 when the sensed temperature is determined to be over-temperature in the over-temperature determination step S320, A normal temperature determination step S340 of determining whether the temperature of the energy storage member 200 corresponds to a set normal temperature and a normal temperature determination step S340 of determining whether the temperature of the energy storage member 200 is normal temperature, (S350).

The temperature sensing step S310 is a step in which the temperature controller 110 receives the temperature sensing signal of the over-temperature sensor 150. [ The over-temperature detection sensor 150 senses the temperature of the energy storage member 200 and outputs the sensed temperature to the temperature control unit 110. At this time, the overheat sensing sensor 150 is wire-shaped and installed between the battery 210 and the battery 210 or inside the housing of the energy storage member 200 to sense the temperature. Therefore, the temperature regulator 110 receives the detection signal of the over-temperature sensor 150. FIG.

In the over-temperature determination step S320, the temperature controller 110 compares the detected over-temperature with the over-temperature that is set after receiving the over-temperature sensor 150, and determines whether the over-temperature is over.

If it is determined that the temperature of the energy storage member 200 corresponds to the set overtemperature in the over-temperature determination step S320, the shutoff step S330 is to output a control signal to the clock signal generation unit 120 . When the control signal of the temperature controller 110 is received, the clock signal generator 120 outputs a short pulse of the clock to the power trip unit 130. Accordingly, the power trip unit 130 is driven when a clock pulse of a short pulse applied from the clock signal generator 120 is applied to shut off the power supply of the energy storage member 200.

Therefore, the energy storage member 200 is not heated in the overtemperature state due to an increase in the internal temperature, and the operation is forcibly stopped until the set temperature is reached.

In the normal temperature determination step S340, the temperature control unit 110 receives the detection signal of the over-temperature detection sensor 150 after the shutoff step S330 and determines whether the temperature of the energy storage member 200 is the set normal temperature .

In the trip releasing step S350, when the temperature of the energy storing member 200 reaches the normal temperature in the normal temperature determining step S340, the temperature controlling unit 110 controls the clock signal generating unit 120 so that the energy storing member 200 200). Here, the clock signal generator 120 applies a trip release signal to the power trip unit 130 as a pulse other than a short pulse. Therefore, the power trip unit 130 releases the trip of the energy storage member 200 when the trip release signal applied to the clock signal generation unit 120 is received.

Preferably, the present invention further includes a step of charging and powering the power supply unit 140. The power supply unit 140 of the overheat shut-off member 100 charges the power supplied from the energy storage member 200 and supplies the power to the temperature control unit 110, the clock signal generation unit 120, and the power trip unit 130, And supplies the power of the set level. That is, the power supply unit 140 can function as the uninterruptible power supply unit, so that even after the energy storage member 200 is forcibly tripped, power can be supplied to the temperature control unit 110 and the like so that the trip release can be performed.

As described above, according to the present invention, in the energy storage system, the overheat blocking member 100 driven separately from the energy storing member 200 can prevent malfunction due to overheating of the energy storing member 200, It is possible to prevent explosion or fire caused by accumulated heat inside the housing which is housed and / or housed, or to shut off the power of the battery even in case of a fire due to a short circuit or other abnormal situation inside and outside the enclosure, can do.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

100: overheat shutoff member 110: temperature control unit
120: Clock signal generator 130: Power supply trip unit
140: Power supply unit 150: Overheat detection sensor
200: Energy storage member 210: Battery
211: Battery cell 220: BMS
230: PMS 240: PCS
300: External system 400: Power connector

Claims (5)

An energy storage member having at least one battery; And
And an overheat blocking member for forcibly tripping the energy storage member when the temperature of the energy storage member is sensed and the overtemperature is set,
The over-temperature shut-
An overheat sensing sensor for sensing a temperature of the energy storage member;
A temperature controller for outputting a control signal when the temperature of the energy storage member sensed by the overheat sensing sensor corresponds to a preset overtemperature;
A clock signal generator for outputting a short-circuit clock (CLOCK) when a control signal is applied from the temperature controller; And
And a power trip unit for forcibly tripping the energy storage member by a clock pulse (CLOCK) of a short pulse from the clock signal generation unit.
The heat exchanger according to claim 1,
Further comprising a power supply for charging the power supplied from the energy storage member to supply power to the temperature control unit or the power trip unit.
The apparatus of claim 1, wherein the energy storage member is accommodated in a container,
Wherein the overheating shut-off member trips the power supply line of the battery by detecting an over-temperature due to accumulated heat generated in the charging and discharging of the energy storage member in the container.
A temperature sensing step of sensing a temperature of an energy storage member having at least one battery;
An over-temperature determination step of determining whether the temperature of the energy storage member corresponds to a set over-temperature in the temperature sensing step; And
And a step of forcibly tripping the energy storage member when the temperature of the energy storage member reaches the set overtemperature in the over-temperature determination step.
Wherein the step of shutting off the energy storage device comprises forcibly tripping the energy storage device by applying a clock pulse of a short pulse to the power supply trip device installed in the power supply line connected to the energy storage device .
5. The method of claim 4, further comprising:
A normal temperature determination step of determining whether the temperature of the energy storage member is a set normal temperature; And
And a trip releasing step of releasing a trip of the energy storage member when the temperature of the energy storage member reaches a normal temperature in the normal temperature determination step.

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