KR20170053529A - Method and system of capacitor crack in battery back - Google Patents

Method and system of capacitor crack in battery back Download PDF

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Publication number
KR20170053529A
KR20170053529A KR1020150156161A KR20150156161A KR20170053529A KR 20170053529 A KR20170053529 A KR 20170053529A KR 1020150156161 A KR1020150156161 A KR 1020150156161A KR 20150156161 A KR20150156161 A KR 20150156161A KR 20170053529 A KR20170053529 A KR 20170053529A
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KR
South Korea
Prior art keywords
leakage current
battery pack
capacitor
crack
detecting
Prior art date
Application number
KR1020150156161A
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Korean (ko)
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KR102025285B1 (en
Inventor
박건태
추성춘
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주식회사 엘지화학
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Priority to KR1020150156161A priority Critical patent/KR102025285B1/en
Publication of KR20170053529A publication Critical patent/KR20170053529A/en
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    • G01R31/3624—
    • G01R31/024—
    • G01R31/028—
    • G01R31/3658—

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Protection Of Static Devices (AREA)

Abstract

The present invention relates to a method for detecting a crack in a capacitor inside a battery package, comprising: a step of turning off a charge FET of the battery package by applying an overcurrent from a power supply device to the battery package; a leakage current detecting step of detecting a leakage current inside the battery package; a leakage current value measuring step of measuring the leakage current and calculating the value; and a step of determining whether a capacitor in the battery package is cracked based on the calculated leakage current value.

Description

METHOD AND SYSTEM FOR CAPACITOR CRACK IN BATTERY BACK BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method and system for detecting a capacitor crack in a battery pack. More particularly, the present invention relates to a method and system for detecting a capacitor crack in a battery pack, And more particularly, to a method and system for detecting a capacitor crack in a battery pack, which can detect a capacitor crack in a battery pack by checking whether a leak current is larger than a leakage current occurring when the battery pack is in a normal state.

If the capacitor inside the battery pack is cracked, leakage current occurs, and if leakage current occurs, the battery pack discharges quickly, which reduces the use time of the electronic equipment and may cause malfunction or failure of the electronic equipment with the battery . Also, when a leakage current occurs in a high-voltage battery such as an electric car or a hybrid vehicle, there are problems that can cause a fatal electric shock to the user.

In order to solve the above problems, conventional techniques for identifying a capacitor crack in a battery pack have directly measured capacitances of capacitors in a battery pack to determine whether or not the capacitors are abnormal.

However, in the conventional technology for checking whether a capacitor is cracked, there is a problem that a crack checking step is added by checking the states of the capacitors one by one and the time required is long.

Therefore, there is a need to develop a technology that can check the leakage current flowing in the battery pack to check the presence or absence of cracks in the capacitors in the battery pack at a time.

KR 1020070089657 A

An object of the present invention is to provide a battery pack internal capacitor crack detection method and system capable of detecting a leakage current value of a battery pack and detecting the presence or absence of a crack in a capacitor inside the battery pack when a leakage current exceeds a leakage current value in a steady state.

A battery capacitor crack detection system according to an embodiment of the present invention is a system for detecting a capacitor crack in a battery pack, comprising: a leakage current detector connected to a battery to detect a leakage current of the battery; A first switch for connecting the leakage current detection unit and the battery pack; And a second switch for connecting the external power supply and the battery pack; The leakage current detector calculates a leakage current value from the voltage value measured by the multimeter and detects a capacitor crack of the battery when the calculated leakage current value has a value equal to or larger than a current value of a normal range stored in advance .

The second switch may provide a path for supplying an overcurrent from the external power supply to the battery pack.

The first switch may provide a path for supplying a leakage current of the battery pack to the leakage current detection unit.

A method for detecting a crack in a capacitor in a battery pack includes the steps of: applying an overcurrent from a power supply to a battery pack to turn off a charge FET of the battery pack; A leakage current detecting step of detecting a leakage current inside the battery pack; A leakage current value measuring step of measuring the leakage current and calculating the value; And determining whether a capacitor in the battery pack is cracked based on the calculated leakage current value. . ≪ / RTI >

The leakage current detection step may detect the leakage current of the battery pack to the external circuit of the battery pack so as to be detected by the external circuit.

The method and system for detecting a crack in a battery capacitor according to an embodiment of the present invention can detect a crack in an internal capacitor of a battery pack by directly measuring a capacity of a capacitor in a conventional battery pack, And the time required to confirm the presence or absence of cracks can be shortened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing a battery pack internal crack crack detection system according to an embodiment of the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of detecting a capacitor crack in a battery pack.

Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, Is provided to fully inform the user.

1. An example of a system for detecting a crack in a capacitor inside a battery pack according to an embodiment of the present invention.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration diagram showing a battery pack internal crack crack detection system according to an embodiment of the present invention; FIG.

Referring to FIG. 1, a battery pack internal capacitor crack detection system 100 according to an embodiment of the present invention may include a power supply 110, a leakage current detection unit 120, and a switch unit 130.

The switch unit 130 may include a first switch 131 and a second switch 132.

The second switch 132 is turned on to provide a path through which the overcurrent applied from the power supply device 110 to the battery pack 200 can be conducted.

More specifically, the second switch 132 may electrically connect or short-circuit the battery pack 200 and the power supply 110 in the battery pack internal capacitor crack detection system 100. When the second switch 132 is turned on, the power supply 110 can apply the overcurrent to the battery pack 200 through the path provided by the second switch 132.

When a power supply 110 applies an overcurrent to the battery pack 200 through the path provided by the second switch 132, a battery management system (not shown) performing a protection operation of the battery pack 200 is operated The overcurrent can be detected. Thereafter, the battery management system can determine whether the sensed overcurrent has a current value equal to or greater than a predetermined normal current range. If it is determined that the detected overcurrent has a current value equal to or greater than a preset normal current range, the battery management system controls the state of the charge FET (not shown) to be off to detect an overcurrent flowing into the battery pack 220 The protection operation of the battery pack 200 can be performed from the overcurrent.

The second switch 132 can be operated in the off state when the path through which the overcurrent applied to the battery pack 200 is blocked due to the off state of the charge FET is blocked.

After the second switch 132 is turned off, the second switch 132 is turned on to connect the leakage current detector 120 and the battery pack 200 to each other, It is possible to provide a path for continuity.

When a leakage current is generated in the battery pack 200, the generated leakage current may flow to the leakage current detection unit 120 through the path provided by the first switch 131.

The leakage current detection unit 120 may include a leakage current detection resistor 121 and a multimeter 122.

The leakage current detection resistor 121 may refer to a resistance element for detecting a leakage current generated in the battery pack 200.

The multimeter 122 can calculate the leakage current value flowing from the battery pack 200 through the leakage current detection resistor 121 provided in the leakage current detection unit 120. [

More specifically, the multimeter 122 can calculate the leakage current value by measuring the voltage value applied to both ends of the leakage current detection resistor 121.

The leakage current detection unit 120 compares the leakage current value calculated in the multimeter 122 with a value of a current value in a normal range that is stored in advance and determines whether or not a crack has occurred in at least one capacitor in the battery pack 200 can do.

As a result of the determination, if the calculated leakage current value has a value equal to or greater than the stored current value in the normal range, the leakage current detector 120 can detect that at least one capacitor in the battery pack 200 has cracked.

2. Detection of cracks in the internal capacitor of the battery pack according to the embodiment of the present invention

Example of.

2 is a flowchart illustrating a method of detecting a capacitor crack in a battery pack according to an embodiment of the present invention.

2, the battery pack internal capacitor crack detection system 100 controls the state of the second switch 132 to be on by electrically connecting the power supply 110 and the battery pack 200 to each other, It is possible to perform step S110 of applying the overcurrent supplied from the supply device 110 to the battery pack 200 through the path provided by the second switch 132. [

Thereafter, the battery pack internal capacitor crack detection system 100 can perform an operation S120 of turning off the charge FET of the battery pack 200 by applying an overcurrent from the power supply 110 to the battery pack 200 have.

The battery pack internal crack detecting system 100 includes a first switch 131 for turning off the second switch 132 and connecting the battery pack 200 and the leakage current detecting unit 120, (S130) to configure the first switch path.

After the first switch path forming step S130, the battery pack internal capacitor crack detecting system 100 may perform a leakage current detecting step S140 for detecting a leakage current inside the battery pack 200. [

After the leakage current detection step S140, the battery pack internal capacitor crack detection system 100 measures a leakage current detected from the leakage current detection unit 120 and calculates a leakage current value measurement step S150 Can be performed.

After performing the leakage current measuring step S150, the battery pack internal crack detecting system 100 determines whether the calculated leakage current value corresponds to a leakage current value range when the capacitors in the battery pack 200 are in a normal state, (Step S160) of determining whether or not the internal capacitor of the battery pack is cracked based on the leakage current value calculated according to the leakage current value range that may occur when the capacitor is present.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. 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 and scope of the invention.

100: Battery pack internal capacitor crack detection system 110: Power supply
120: Leakage current detection unit 121: Leakage current detection resistor
122: Multimeter 200: Battery pack
130: switch unit 131: first switch
132: second switch

Claims (5)

A method for detecting a crack in a capacitor inside a battery pack,
Turning off the charge FET of the battery pack by applying an overcurrent from the power supply to the battery pack;
A leakage current detecting step of detecting a leakage current inside the battery pack;
A leakage current value measuring step of measuring the leakage current and calculating the value; And
Determining whether a capacitor in the battery pack is cracked based on the calculated leakage current value;
And a capacitor connected to the capacitor.

The method according to claim 1, wherein the leakage current detection step comprises:
Wherein the leakage current of the battery pack flows to an external circuit of the battery pack and is detected by the external circuit.
A system for detecting a capacitor crack in a battery pack,
A leakage current detector connected to the battery pack and detecting the leakage current, the leakage current detector comprising: a leakage current detecting resistor through which the leakage current is conducted; and a multimeter for measuring a voltage across the leakage current detecting resistor.
A first switch for connecting the leakage current detection unit and the battery pack; And
And a second switch for connecting the external power supply to the battery pack,
The leakage current detector calculates a leakage current value from the voltage value measured by the multimeter, and when the calculated leakage current value has a value equal to or larger than a current value of a normal range stored in advance, a capacitor crack of the battery pack And the battery pack internal crack detection system detects the internal capacitor crack detection system.
The plasma display apparatus according to claim 3,
And a path for supplying an overcurrent from the external power supply to the battery pack.
The plasma display apparatus according to claim 3,
And a path for supplying the leakage current of the battery pack to the leakage current detection unit.
KR1020150156161A 2015-11-06 2015-11-06 Method and system of capacitor crack in battery back KR102025285B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150156161A KR102025285B1 (en) 2015-11-06 2015-11-06 Method and system of capacitor crack in battery back

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Application Number Priority Date Filing Date Title
KR1020150156161A KR102025285B1 (en) 2015-11-06 2015-11-06 Method and system of capacitor crack in battery back

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KR20170053529A true KR20170053529A (en) 2017-05-16
KR102025285B1 KR102025285B1 (en) 2019-09-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022173173A1 (en) * 2021-02-09 2022-08-18 주식회사 엘지에너지솔루션 Device for inspecting for electrode assembly defects before electrolyte injection and defect inspection method therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070089657A (en) 2006-02-28 2007-08-31 가부시키가이샤 니데크 Hole data inputing apparatus, and spectacle lens machining apparatus having same
KR20080037941A (en) * 2006-10-27 2008-05-02 현대자동차주식회사 Method and apparatus for measuring the leakage current of energy storage device in a hybrid fuel cell vehicle using the free charger
KR20100027085A (en) * 2008-09-01 2010-03-10 주식회사 엘지화학 Apparatus and method for sensing leakage current of battery, and battery-driven apparatus and battery pack including the apparatus
JP2012132725A (en) * 2010-12-20 2012-07-12 Yazaki Corp Flying capacitor failure detector of insulation state detection unit
JP2014064404A (en) * 2012-09-21 2014-04-10 Yazaki Corp Voltage detector and equalization device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070089657A (en) 2006-02-28 2007-08-31 가부시키가이샤 니데크 Hole data inputing apparatus, and spectacle lens machining apparatus having same
KR20080037941A (en) * 2006-10-27 2008-05-02 현대자동차주식회사 Method and apparatus for measuring the leakage current of energy storage device in a hybrid fuel cell vehicle using the free charger
KR20100027085A (en) * 2008-09-01 2010-03-10 주식회사 엘지화학 Apparatus and method for sensing leakage current of battery, and battery-driven apparatus and battery pack including the apparatus
JP2012132725A (en) * 2010-12-20 2012-07-12 Yazaki Corp Flying capacitor failure detector of insulation state detection unit
JP2014064404A (en) * 2012-09-21 2014-04-10 Yazaki Corp Voltage detector and equalization device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022173173A1 (en) * 2021-02-09 2022-08-18 주식회사 엘지에너지솔루션 Device for inspecting for electrode assembly defects before electrolyte injection and defect inspection method therefor

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