KR101653689B1 - Method of nondestructive stiffness inspection in battery cell and apparatus thereof - Google Patents

Method of nondestructive stiffness inspection in battery cell and apparatus thereof Download PDF

Info

Publication number
KR101653689B1
KR101653689B1 KR1020130125019A KR20130125019A KR101653689B1 KR 101653689 B1 KR101653689 B1 KR 101653689B1 KR 1020130125019 A KR1020130125019 A KR 1020130125019A KR 20130125019 A KR20130125019 A KR 20130125019A KR 101653689 B1 KR101653689 B1 KR 101653689B1
Authority
KR
South Korea
Prior art keywords
vibration
battery cell
stiffness
unit
frequency
Prior art date
Application number
KR1020130125019A
Other languages
Korean (ko)
Other versions
KR20150045594A (en
Inventor
박기수
허준혁
Original Assignee
주식회사 엘지화학
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 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to KR1020130125019A priority Critical patent/KR101653689B1/en
Publication of KR20150045594A publication Critical patent/KR20150045594A/en
Application granted granted Critical
Publication of KR101653689B1 publication Critical patent/KR101653689B1/en

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04Analysing solids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures
    • G01M7/02Vibration-testing by means of a shake table
    • G01M7/022Vibration control arrangements, e.g. for generating random vibrations
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures
    • G01M7/02Vibration-testing by means of a shake table
    • G01M7/025Measuring arrangements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/348Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/36Detecting the response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/42Detecting the response signal, e.g. electronic circuits specially adapted therefor by frequency filtering or by tuning to resonant frequency
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4409Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285Testing apparatus
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/01Indexing codes associated with the measuring variable
    • G01N2291/014Resonance or resonant frequency
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/028Material parameters
    • G01N2291/0289Internal structure, e.g. defects, grain size, texture
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

개시된 내용은 배터리 셀의 비파괴 강성검사방법 및 그 장치에 관한 것으로서, 진동 발생부에서 검사대상 배터리 셀에 사전에 설정한 강도의 진동을 발생시키면, 진동 측정부에서 진동 발생부의 동작에 의해 배터리 셀이 진동할 때 발생하는 진동 주파수를 측정하고, 잡음 제거부는 진동 측정부에서 측정한 진동 주파수의 잡음신호를 제거하여 제어부로 출력하고, 제어부는 진동 측정부와 잡음 제거부를 통해 입력받은 잡음신호가 제거된 진동 주파수에서 피크값 주파수를 검출한 후, 검출된 피크값 주파수를 토대로 강성을 확인하며, 확인된 검사대상 배터리 셀의 강성 정보와 강성 정보를 토대로 한 정상상태 또는 불량상태를 표시부를 통해 표시한다.
따라서, 본 발명은 종래처럼 배터리 셀을 직접 파괴하지 않고도 손쉽게 강성검사를 수행할 수 있으며, 파괴방식의 검사방식이 아니기 때문에 전수검사가 가능함은 물론, 추가 분석작업이 용이하다.
The present invention relates to a method of inspecting a non-destructive stiffness of a battery cell and, more particularly, to a method of inspecting a non-destructive stiffness of a battery cell, The noise removing unit removes the noise signal of the vibration frequency measured by the vibration measuring unit and outputs the noise signal to the control unit. The control unit detects the noise signal inputted through the vibration measuring unit and the noise removing unit, After detecting the peak value frequency at the vibration frequency, the rigidity is confirmed based on the detected peak value frequency, and a steady state or a bad state based on the determined stiffness information and stiffness information of the battery cell to be inspected is displayed on the display unit.
Therefore, the present invention can easily perform the stiffness inspection without directly destroying the battery cell as in the prior art, and it is not an inspection method of the failure type, so it is possible to perform full inspection and further analysis work.

Description

배터리 셀의 비파괴 강성검사방법 및 그 장치{Method of nondestructive stiffness inspection in battery cell and apparatus thereof}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a nondestructive stiffness inspection method for a battery cell,

본 발명은 진동 주파수를 이용한 비파괴 검사를 통해 강성(stiffness)을 검사하도록 하는 배터리 셀의 비파괴 강성검사방법 및 그 장치에 관한 것이다.The present invention relates to a non-destructive stiffness inspection method and apparatus for a battery cell for inspecting stiffness through non-destructive inspection using a vibration frequency.

일반적으로 이차전지(rechargeable battery)는 외부 전원으로 공급받은 전류가 양극과 음극 사이에서 물질의 산화, 환원 반응을 일으키는 과정에서 생성된 전기를 충전하는 방식으로 반영구적 사용이 가능한 전지를 말한다. 한 번 쓰고 버리는 일차전지(primary battery, 일반 건전지)가 재사용이 불가능하고 전지의 수거나 재활용 등에 드는 비용이 많다는 단점이 있는 반면, 이차전지는 여러 번 충전을 할 수 있다는 장점을 가지고 있다. 또한, 이차전지는 노트북 컴퓨터와 휴대전화, 캠코더 등 들고다니는 전자기기뿐만 아니라 전기자동차의 핵심소재이며, 부가가치가 높아 반도체 및 디스플레이와 함께 21세기 '3대 전자부품'으로 꼽힌다. 특히 이차전지는 2011년 기준 세계시장 규모가 200억 달러를 돌파하였으며 전기자동차 시장의 성장과 더불어 중대형 에너지 저장용 이차전지 시장의 성장으로 향후 그 규모가 더 확대될 것으로 전망된다.Generally, a rechargeable battery refers to a battery that can be used semi-permanently by charging electric current generated by an electric current supplied from an external power source to an anode and a cathode in a process of oxidizing or reducing a material. The primary battery has a disadvantage of being incapable of being re-used and costly to recycle or recharge the battery, while the rechargeable battery has the advantage that it can be charged several times. In addition, secondary batteries are the core materials of electric vehicles as well as electronic devices carrying notebook computers, mobile phones, and camcorders, and are considered to be 'three major electronic components' in the 21st century along with semiconductors and displays due to their high added value. In particular, rechargeable batteries have surpassed the $ 20 billion global market by 2011, and the size of the rechargeable battery market is expected to expand in the future as the market for electric vehicles grows and the market for rechargeable batteries for medium and large-sized energy storage grows.

이차전지는 충전물질로 무엇을 쓰느냐에 따라 니켈전지, 이온전지, 리튬이온전지, 폴리머전지, 리튬폴리머전지, 리튬설파전지 등으로 나뉘어진다. 1980년대에 니켈카드뮴전지와 니켈수소전지의 등장에 이어 1990년대에 리튬계 이차전지가 등장하였고, 2000년대 이후 리튬폴리머전지가 도입되면서 이차전지의 새로운 시대를 맞고 있다.The rechargeable battery is divided into a nickel battery, an ion battery, a lithium ion battery, a polymer battery, a lithium polymer battery, and a lithium sulfide battery depending on what is used as a charging material. Since the introduction of nickel-cadmium batteries and nickel-metal hydride batteries in the 1980s, lithium-based secondary batteries have emerged in the 1990s, and lithium-polymer batteries have been introduced since the 2000s.

리튬이온전지는 최근 전자 장비의 소형화 및 경량화가 실현되고 휴대용 전자 기기의 사용이 일반화됨에 따라 현재 이차전지 시장의 대부분을 차지하고 있는 것으로서, 리튬 이온의 삽입 및 탈리가 가능한 물질을 음극부 및 양극부로 사용하고, 양극부과 음극부 사이에 유기 전해액 또는 폴리머 전해액을 충전시켜 제조하며, 리튬 이온이 양극부 및 음극부에서 삽입 및 탈리될 때의 산화, 환원 반응에 의하여 전기적 에너지를 생성한다. 무게가 가벼운 데다 고용량의 전지를 만드는 데 유리해 소용량의 휴대전화기 배터리로부터 대용량의 전기자동차 배터리에 이르기까지 다양하게 사용되고 있다.Lithium-ion batteries have recently become the mainstream of the rechargeable battery market because of the miniaturization and weight reduction of electronic equipment and the generalization of use of portable electronic devices. As a result, materials capable of inserting and removing lithium ions are used as cathode and anode And an organic electrolytic solution or a polymer electrolytic solution is charged between the anode part and the cathode part, and electrical energy is generated by oxidation and reduction reaction when lithium ions are inserted and removed from the anode part and the cathode part. It is light in weight and has a wide range of uses, from low-capacity cell phone batteries to large-capacity electric vehicle batteries, which is advantageous in making high capacity batteries.

또한, 리튬폴리머전지는 리튬이온전지에서 한 단계 발전한 전지로, 양극과 음극 사이에 고체나 겔 형태의 폴리머 재료로 된 전해질을 사용, 전기를 발생시킨다. 모양을 다양하게 할 수 있고 현재까지 개발된 이차전지 가운데 가장 얇은 전지를 만들 수 있다는 장점이 있다.In addition, the lithium polymer battery is a step-up battery in a lithium ion battery, and generates electricity by using an electrolyte made of a polymer material of a solid or gel form between the anode and the cathode. It has the advantage of being able to make various shapes and to make the thinnest battery among the secondary batteries developed so far.

이러한 이차전지는 통상적으로 다수의 배터리 셀을 포함하여 구성되며, 각 배터리 셀은 얇게 구성되어 있기 때문에 균열에 민감할 수 있다. 따라서 생산한 배터리 셀의 강성을 검사하게 되는데, 종래의 검사방식은 생산한 배터리 셀의 일부를 샘플링한 후, 배터리 셀이 파괴될 때까지 외부에서 힘을 가하는 방식으로 강성검사를 진행하였다.Such a secondary battery typically includes a plurality of battery cells, and each battery cell is thin, so that it may be susceptible to cracks. Accordingly, the rigidity of the produced battery cell is inspected. In the conventional inspection method, a part of the produced battery cell is sampled, and the rigidity test is performed by externally applying force until the battery cell is destroyed.

하지만, 상술한 바와 같은 종래의 배터리 셀 강성검사는 파괴방식으로 이루어졌기 때문에 생산하는 모든 배터리 셀의 강성을 확인하는 것이 불가능하였으며, 이에 따라 검사대상의 배터리 셀을 파괴하지 않는 비파괴 형태의 검사방식 도입이 필요한 실정이다.However, since the conventional battery cell stiffness test as described above is made in a destructive manner, it is impossible to confirm the rigidity of all the battery cells to be produced. Thus, introduction of a non-destructive inspection method .

대한민국 공개실용신안공보 제20-2013-0003274호 2013. 6. 3.Korean Utility Model Publication No. 20-2013-0003274.

본 발명은, 배터리 셀을 직접 파괴하지 않고 진동을 이용한 비파괴 방식으로 강성검사를 수행하도록 하는 배터리 셀의 비파괴 강성검사방법 및 그 장치를 제공한다.The present invention provides a non-destructive stiffness testing method and apparatus for a battery cell that performs stiffness testing in a non-destructive manner using vibration without directly destroying a battery cell.

본 발명의 일 실시예에 따른 배터리 셀의 비파괴 강성검사방법은, (1) 진동 발생부는, 제어부로부터 입력받은 제어신호를 토대로 검사대상 배터리 셀에 사전에 설정한 강도의 진동을 발생시키는 단계와, (2) 진동 측정부는, 진동 발생부의 동작에 의해 배터리 셀이 진동할 때 발생하는 진동 주파수를 측정하는 단계와, (3) 잡음 제거부는, 진동 측정부에서 측정한 진동 주파수의 잡음신호를 제거하고, 잡음신호를 제거한 진동 주파수를 제어부로 출력하는 단계와, (4) 제어부는, 잡음 제거부로부터 입력받은 잡음신호가 제거된 진동 주파수에서 피크값 주파수를 검출하고, 검출된 피크값 주파수를 토대로 강성을 확인하는 단계, 그리고 (5) 제어부는, (4) 단계에서 확인된 검사대상 배터리 셀의 강성 정보와, 강성 정보를 토대로 한 정상상태 또는 불량상태를 표시부를 통해 표시하는 단계를 포함할 수 있다.A method of inspecting a non-destructive stiffness of a battery cell according to an embodiment of the present invention includes the steps of: (1) generating a vibration of a predetermined strength in a battery cell to be inspected based on a control signal received from a controller; (2) The vibration measuring unit measures a vibration frequency generated when the battery cell vibrates by the operation of the vibration generating unit. (3) The noise removing unit removes the noise signal of the vibration frequency measured by the vibration measuring unit (4) the control unit detects a peak value frequency at a vibration frequency from which the noise signal received from the noise removing unit is removed, and calculates a stiffness value based on the detected peak value frequency, (5) The control unit displays the steady state or the bad state based on the stiffness information of the battery cell to be inspected and the stiffness information identified in the step (4) It may include a step of displaying through the.

또한, 본 발명의 일 실시예에 따른 배터리 셀의 비파괴 강성검사장치는, 검사대상의 배터리 셀과, 제어부의 제어를 토대로 배터리 셀에 사전에 설정한 강도의 진동을 발생시키는 진동 발생부와, 진동 발생부의 동작에 의해 배터리 셀이 진동할 때 발생하는 진동 주파수를 측정하는 진동 측정부와, 진동 측정부에서 측정한 진동 주파수의 잡음신호를 제거하고, 잡음신호를 제거한 진동 주파수를 제어부로 출력하는 잡음 제거부와, 강성검사 대상이 되는 배터리 셀에 진동을 발생시키기 위한 제어신호를 생성하여 진동 발생부로 출력하고, 진동 측정부와 잡음 제거부를 통해 입력되는 잡음신호가 제거된 진동 주파수에서 피크값 주파수를 검출하고, 검출된 피크값 주파수를 토대로 강성을 확인하며, 각 배터리 셀의 강성 정보 및 강성 정보를 토대로 한 정상상태 또는 불량상태의 표시를 제어하는 제어부, 그리고 제어부의 제어를 토대로 배터리 셀의 강성 정보와, 강성 정보를 토대로 한 정상상태 또는 불량상태를 화면상에 표시하는 표시부를 포함할 수 있다.According to another aspect of the present invention, there is provided an apparatus for inspecting a non-destructive stiffness of a battery cell, including: a battery cell to be inspected; a vibration generating unit generating a vibration of a predetermined strength in the battery cell based on control of the control unit; A vibration measuring unit for measuring a vibration frequency generated when the battery cell vibrates due to an operation of the generating unit; a noise removing unit for removing a noise signal of the vibration frequency measured by the vibration measuring unit and outputting the vibration frequency, And outputting a control signal for generating vibration to the battery cell to be subjected to the rigidity test and outputting the control signal to the vibration generating unit and detecting a peak value frequency at a vibration frequency from which the noise signal inputted through the vibration measuring unit and the noise removing unit is removed Based on the detected stiffness information and stiffness information of each battery cell, And a display unit for displaying on the screen a steady state or a bad state based on the stiffness information of the battery cell and the stiffness information on the basis of the control of the control unit.

그리고 상술한 잡음 제거부는 필터로 구성하는 것이 바람직하다.It is preferable that the above-mentioned noise removing unit is constituted by a filter.

이상에서와 같이 본 발명의 배터리 셀의 비파괴 강성검사방법 및 그 장치에 따르면, 진동 주파수를 이용한 비파괴 방식으로 강성을 검사함으로써, 종래처럼 배터리 셀을 직접 파괴하지 않고도 손쉽게 강성검사를 수행할 수 있으며, 파괴방식의 검사방식이 아니기 때문에 전수검사가 가능함은 물론, 추가 분석작업이 용이한 효과가 있다.As described above, according to the non-destructive stiffness testing method and apparatus of the battery cell of the present invention, it is possible to easily perform the stiffness test without directly destroying the battery cell, Since it is not a destructive inspection method, it is possible to perform complete inspection and it is easy to perform additional analysis work.

도 1은 본 발명의 일 실시예에 따른 배터리 셀의 비파괴 강성검사장치의 구성을 개략적으로 나타낸 도면,
도 2는 본 발명의 일 실시예에 따른 배터리 셀의 비파괴 강성검사방법의 동작과정을 상세하게 나타낸 순서도이다.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a non-destructive stiffness testing apparatus for a battery cell according to an embodiment of the present invention;
2 is a flowchart illustrating an operation of a method for inspecting a non-destructive stiffness of a battery cell according to an embodiment of the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 배터리 셀의 비파괴 강성검사방법 및 그 장치를 상세하게 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for testing a non-destructive stiffness of a battery cell according to the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 배터리 셀의 비파괴 강성검사장치의 구성을 개략적으로 나타낸 도면이다.FIG. 1 is a schematic view of a non-destructive stiffness testing apparatus for a battery cell according to an embodiment of the present invention. Referring to FIG.

도시된 바와 같이 본 발명의 강성검사장치는, 배터리 셀(10), 진동 발생부(20), 진동 측정부(30), 잡음 제거부(40), 제어부(50), 표시부(60) 등으로 구성된다.The stiffness testing apparatus of the present invention includes a battery cell 10, a vibration generating unit 20, a vibration measuring unit 30, a noise removing unit 40, a control unit 50, a display unit 60, .

배터리 셀(10)은 본 발명에 의한 비파괴 강성검사의 대상이 되는 물품으로서, 강성검사시 기계적인 수단(예를 들어, 컨베이어 등)을 통해 검사장치 내로 이송된다.The battery cell 10 is an article to be subjected to the nondestructive stiffness test according to the present invention and is transferred into the inspection apparatus through mechanical means (for example, a conveyor, etc.) during the stiffness inspection.

진동 발생부(20)는 제어부(50)로부터 진동발생 제어신호가 입력되면, 해당 제어신호를 토대로 검사대상의 배터리 셀(10)에 사전에 설정한 강도의 진동을 발생시킨다.When the vibration generation control signal is input from the control unit 50, the vibration generation unit 20 generates vibration of a predetermined intensity in the battery cell 10 to be inspected based on the control signal.

진동 측정부(30)는 진동 발생부(20)의 동작에 의해 검사대상의 배터리 셀(10)이 진동할 때 발생하는 진동 주파수를 측정하고, 측정된 진동 주파수를 후단의 잡음 제거부(40)로 출력한다. 이때, 진동 측정부(30)에서의 진동 주파수 측정은 공지되어 있는 모든 종류의 방식을 사용할 수 있다.The vibration measuring unit 30 measures the vibration frequency generated when the battery cell 10 to be inspected vibrates by the operation of the vibration generating unit 20 and outputs the measured vibration frequency to the noise eliminating unit 40 . At this time, the vibration measuring unit 30 may use any known method of measuring the vibration frequency.

잡음 제거부(40)는 진동 측정부(30)에서 측정한 진동 주파수의 잡음신호를 제거하고, 잡음신호를 제거한 진동 주파수를 제어부(50)로 출력한다.The noise removing unit 40 removes the noise signal of the vibration frequency measured by the vibration measuring unit 30 and outputs the vibration frequency from which the noise signal is removed to the control unit 50.

이때 잡음 제거부(40)는 일반적으로 알려진 필터로 구성하는 것이 바람직하며, 특정 재질의 배터리 셀(10)에서 발생하는 진동 범위의 다른 잡음신호를 필터링할 수 있는 것이라면 어떠한 소자를 사용해도 무방하다.At this time, it is preferable that the noise removing unit 40 is constituted by a generally known filter, and any element can be used as long as it can filter out noise signals of a vibration range generated in the battery cell 10 of a specific material.

제어부(50)는 통상적인 컴퓨터를 의미하는 것으로서, 강성검사 대상이 되는 배터리 셀(10)에 진동을 발생시키기 위한 제어신호를 생성하여 진동 발생부(20)로 출력한다. 그리고 진동 측정부(30)와 잡음 제거부(40)를 통해 입력되는 잡음신호가 제거된 진동 주파수에서 피크값(peak-value) 주파수를 검출하고, 검출된 피크값 주파수를 토대로 강성을 확인한다.The control unit 50 refers to a typical computer and generates a control signal for generating vibration in the battery cell 10 to be subjected to the rigidity test and outputs the control signal to the vibration generating unit 20. Then, a peak-value frequency is detected at the vibration frequency at which the noise signal input through the vibration measuring unit 30 and the noise removing unit 40 is removed, and the rigidity is confirmed based on the detected peak value frequency.

또한, 제어부(50)는 검사대상의 모든 배터리 셀(10)의 확인된 강성 정보와, 강성 정보를 토대로 한 정상상태 또는 불량상태를 표시부(60)를 통해 표시하도록 제어한다.The control unit 50 controls the display unit 60 to display the steady state or the defective state based on the identified stiffness information and the stiffness information of all the battery cells 10 to be inspected.

이때 제어부(50)는 검사대상의 배터리 셀(10)에서 발생하는 진동을 측정한 진동 주파수의 피크값 주파수를 토대로 강성을 확인할 때, 하기의 수학식을 사용하여 강성을 확인한다.At this time, when the rigidity is checked on the basis of the peak value frequency of the vibration frequency at which the vibration occurring in the battery cell 10 to be inspected is measured, the controller 50 confirms the rigidity using the following equation.

Figure 112013094520176-pat00001
(여기서, Wn은 고유진동수, k는 강성, m은 질량)
Figure 112013094520176-pat00001
(Where Wn is the natural frequency, k is the stiffness, and m is the mass)

즉 상술한 수학식에서 보는 바와 같이, 진동수는 강성에 루트 비례하고, 질량에 루트 반비례하는 특성(즉 강성이 클수록 진동수가 크다고 할 수 있음)을 이용하여, 검사대상의 배터리 셀(10)에서 발생하는 진동 주파수에서의 피크값 주파수(Wn)와 배터리 셀(10)의 질량(m)을 알고 있으므로 강성을 손쉽게 확인할 수 있는 것이다.That is, as shown in the above-described equation, the frequency is root-proportional to the stiffness, and the characteristic that occurs in the battery cell 10 to be inspected is obtained by using the characteristic that the root is in inverse proportion to the mass (that is, Since the peak value frequency Wn at the vibration frequency and the mass m of the battery cell 10 are known, the stiffness can be easily confirmed.

표시부(60)는 제어부(50)의 제어를 토대로 검사대상 배터리 셀(10)의 강성을 화면상에 표시한다. 그리고 검사가 완료된 각 배터리 셀(10)의 강성 정보를 토대로 정상상태 또는 불량상태를 화면상에 표시한다.The display unit 60 displays the rigidity of the battery cell 10 to be inspected on the screen based on the control of the controller 50. [ Then, based on the rigidity information of each battery cell 10 that has been inspected, a steady state or a bad state is displayed on the screen.

다음에는, 이와 같이 구성된 본 발명에 따른 배터리 셀의 비파괴 강성검사방법의 일 실시예를 도 2를 참조하여 상세하게 설명한다.Next, an embodiment of a method for inspecting a non-destructive stiffness of a battery cell according to the present invention will be described in detail with reference to FIG.

도 2는 본 발명의 일 실시예에 따른 배터리 셀의 비파괴 강성검사방법의 동작과정을 상세하게 나타낸 순서도이다.2 is a flowchart illustrating an operation of a method for inspecting a non-destructive stiffness of a battery cell according to an embodiment of the present invention.

우선, 비파괴 강성검사를 위해 검사장치 내로 검사대상 배터리 셀(10)이 위치한 이후, 진동 발생부(20)는 제어부(50)로부터 입력받은 제어신호를 토대로 검사대상 배터리 셀(10)에 사전에 설정한 강도의 진동을 발생시킨다(S10).First, after the battery cell 10 to be inspected is placed in the inspection apparatus for the nondestructive stiffness inspection, the vibration generator 20 sets the vibration cell 20 in advance on the inspection target battery cell 10 based on the control signal input from the controller 50 Thereby generating a vibration of one intensity (S10).

그러면 진동 측정부(30)는 진동 발생부(20)의 동작에 의해 검사대상 배터리 셀(10)이 진동할 때 발생하는 진동 주파수를 측정하고, 이를 잡음 제거부(40)로 출력한다(S20).Then, the vibration measuring unit 30 measures the vibration frequency generated when the battery cell 10 to be inspected vibrates by the operation of the vibration generating unit 20, and outputs the measured frequency to the noise removing unit 40 (S20) .

잡음 제거부(40)는 진동 측정부(30)로부터 입력된 진동 주파수에서 잡음신호를 제거하고, 잡음신호를 제거한 진동 주파수를 제어부(50)로 출력한다(S30).The noise removing unit 40 removes the noise signal from the vibration frequency inputted from the vibration measuring unit 30 and outputs the vibration frequency from which the noise signal is removed to the control unit 50 (S30).

제어부(50)는 잡음 제거부(40)로부터 입력받은 잡음신호가 제거된 진동 주파수에서 피크값 주파수를 검출하고(S40), 검출된 피크값 주파수를 토대로 강성을 확인한다(S50).The control unit 50 detects the peak value frequency at the vibration frequency from which the noise signal received from the noise removing unit 40 is removed (S40), and confirms the rigidity based on the detected peak value frequency (S50).

이때 제어부(50)는 S50 단계에서 피크값 주파수를 토대로 강성을 확인할 때, 전술한 구성에서 언급한 수학식을 토대로 검사대상 배터리 셀(10)의 강성을 확인한다. 즉 진동수와 강성이 루트 비례한다는 특성을 이용하여, 제어부(50)에서 확인한 검사대상의 배터리 셀(10)에서 발생하는 진동 주파수에서의 피크값 주파수(Wn)와 배터리 셀(10)의 질량(m)을 토대로 강성을 손쉽게 확인하는 것이다.At this time, when the rigidity is checked based on the peak value frequency in step S50, the controller 50 confirms the rigidity of the battery cell 10 to be inspected based on the above-mentioned formula. The peak value frequency Wn at the vibration frequency generated in the battery cell 10 to be inspected and the mass m of the battery cell 10 detected at the control unit 50 ) To check the rigidity easily.

마지막으로, 제어부(50)는 S50 단계를 통해 확인된 검사대상 배터리 셀(10)의 강성 정보와, 강성 정보를 토대로 한 정상상태 또는 불량상태를 표시부(60)를 통해 표시하도록 제어한다(S60).Finally, the control unit 50 controls the display unit 60 to display a steady state or a bad state based on the stiffness information and the stiffness information of the battery cell 10 to be inspected confirmed in step S50 (S60) .

이처럼, 본 발명은 종래와 같이 검사대상의 배터리 셀을 직접 파괴하여 강성검사를 수행할 필요없이 배터리 셀에 일정한 진동을 가하는 비파괴 방식으로 강성검사를 편리하게 수행할 수 있으며, 파괴방식의 검사방식이 아니기 때문에 전수검사가 가능하다.As described above, according to the present invention, it is possible to conveniently perform the stiffness test in a non-destructive manner in which the battery cell is subjected to a constant vibration without directly performing destructive testing of the battery cell to be inspected, Because it is not, it is possible to check the whole number.

여기에서, 상술한 본 발명에서는 바람직한 실시예를 참조하여 설명하였지만, 해당 기술분야의 숙련된 당업자는 하기의 특허청구범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경할 수 있음을 이해할 수 있을 것이다.It will be apparent to those skilled in the art that various modifications may be made to the invention without departing from the spirit and 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.

10 : 배터리 셀 20 : 진동 발생부
30 : 진동 측정부 40 : 잡음 제거부
50 : 제어부 60 : 표시부
10: Battery cell 20: Vibration generator
30: vibration measuring unit 40: noise removing unit
50: control unit 60: display unit

Claims (5)

(1) 진동 발생부는, 제어부로부터 입력받은 제어신호를 토대로 검사대상 배터리 셀에 사전에 설정한 강도의 진동을 발생시키는 단계,
(2) 진동 측정부는, 상기 진동 발생부의 동작에 의해 상기 배터리 셀이 진동할 때 발생하는 진동 주파수를 측정하는 단계,
(3) 잡음 제거부는, 상기 진동 측정부에서 측정한 진동 주파수의 잡음신호를 제거하고, 잡음신호를 제거한 진동 주파수를 상기 제어부로 출력하는 단계,
(4) 상기 제어부는, 상기 잡음 제거부로부터 입력받은 잡음신호가 제거된 진동 주파수에서 피크값 주파수를 검출하고, 검출된 피크값 주파수를 토대로 수학식
Figure 112016034909084-pat00006
(여기서, Wn은 고유진동수, k는 강성, m은 질량)을 사용하여 강성을 확인하는 단계, 그리고
(5) 상기 제어부는, 상기 (4) 단계에서 확인된 검사대상 배터리 셀의 강성 정보와, 강성 정보를 토대로 한 정상상태 또는 불량상태를 표시부를 통해 표시하는 단계를 포함하는 배터리 셀의 비파괴 강성검사방법.
(1) The vibration generating unit includes a step of generating a vibration of a predetermined strength in the battery cell to be inspected based on the control signal input from the control unit,
(2) The vibration measuring unit may include measuring a vibration frequency generated when the battery cell vibrates by the operation of the vibration generating unit,
(3) The noise removing unit may include a step of removing the noise signal of the vibration frequency measured by the vibration measuring unit and outputting the vibration frequency from which the noise signal is removed to the control unit,
(4) The control unit detects the peak value frequency at the vibration frequency from which the noise signal received from the noise removing unit is removed,
Figure 112016034909084-pat00006
(Where Wn is the natural frequency, k is the stiffness, and m is the mass), and
(5) The non-destructive stiffness test of the battery cell including the step of displaying the steady state or the bad state based on the stiffness information of the battery cell to be inspected and the stiffness information confirmed in the step (4) Way.
삭제delete 검사대상의 배터리 셀,
제어부의 제어를 토대로 상기 배터리 셀에 사전에 설정한 강도의 진동을 발생시키는 진동 발생부,
상기 진동 발생부의 동작에 의해 상기 배터리 셀이 진동할 때 발생하는 진동 주파수를 측정하는 진동 측정부,
상기 진동 측정부에서 측정한 진동 주파수의 잡음신호를 제거하고, 잡음신호를 제거한 진동 주파수를 제어부로 출력하는 잡음 제거부,
강성검사 대상이 되는 상기 배터리 셀에 진동을 발생시키기 위한 제어신호를 생성하여 상기 진동 발생부로 출력하고, 상기 진동 측정부와 상기 잡음 제거부를 통해 입력되는 잡음신호가 제거된 진동 주파수에서 피크값 주파수를 검출하고, 검출된 피크값 주파수를 토대로 수학식
Figure 112016034909084-pat00007
(여기서, Wn은 고유진동수, k는 강성, m은 질량)을 사용하여 강성을 확인하며, 각 배터리 셀의 강성 정보 및 강성 정보를 토대로 한 정상상태 또는 불량상태의 표시를 제어하는 제어부, 그리고
상기 제어부의 제어를 토대로 상기 배터리 셀의 강성 정보와, 강성 정보를 토대로 한 정상상태 또는 불량상태를 화면상에 표시하는 표시부를 포함하는 배터리 셀의 비파괴 강성검사장치.
The battery cell to be inspected,
A vibration generating unit for generating vibration of a predetermined strength in the battery cell based on control of the control unit,
A vibration measuring unit for measuring a vibration frequency generated when the battery cell vibrates by the operation of the vibration generating unit,
A noise removing unit for removing a noise signal of the vibration frequency measured by the vibration measuring unit and outputting the vibration frequency from which the noise signal is removed to the control unit,
A control unit for generating a control signal for generating vibration in the battery cell to be a stiffness inspection target and outputting the control signal to the vibration generating unit and for outputting a peak value frequency at a vibration frequency from which noise signals inputted through the vibration measuring unit and the noise removing unit are removed And based on the detected peak value frequency,
Figure 112016034909084-pat00007
A control unit for controlling the display of the steady state or the bad state based on the stiffness information and the stiffness information of each battery cell, wherein the control unit confirms the stiffness using the characteristic frequency (where Wn is the natural frequency, k is the stiffness and m is the mass)
And a display unit for displaying on the screen a steady state or a bad state based on the rigidity information and the stiffness information of the battery cell based on the control of the control unit.
삭제delete 제 3 항에 있어서,
상기 잡음 제거부는,
필터인 것을 특징으로 하는 배터리 셀의 비파괴 강성검사장치.
The method of claim 3,
The noise-
Wherein the non-destructive stiffness testing device is a filter.
KR1020130125019A 2013-10-21 2013-10-21 Method of nondestructive stiffness inspection in battery cell and apparatus thereof KR101653689B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130125019A KR101653689B1 (en) 2013-10-21 2013-10-21 Method of nondestructive stiffness inspection in battery cell and apparatus thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130125019A KR101653689B1 (en) 2013-10-21 2013-10-21 Method of nondestructive stiffness inspection in battery cell and apparatus thereof

Publications (2)

Publication Number Publication Date
KR20150045594A KR20150045594A (en) 2015-04-29
KR101653689B1 true KR101653689B1 (en) 2016-09-02

Family

ID=53037473

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020130125019A KR101653689B1 (en) 2013-10-21 2013-10-21 Method of nondestructive stiffness inspection in battery cell and apparatus thereof

Country Status (1)

Country Link
KR (1) KR101653689B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104977218B (en) * 2015-07-16 2018-10-09 南京神源生智能科技有限公司 Micro-elastic detail rigidity detection device and method
EP3677908B1 (en) * 2018-03-06 2023-04-26 LG Energy Solution, Ltd. Apparatus for diagnosing crack of battery pack and battery pack and vehicle including same
KR102621824B1 (en) * 2021-03-30 2024-01-10 (주)이너아이 Nondestructive inspection method of inner crack of pouch type secondary battery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010101706A (en) * 2008-10-22 2010-05-06 Chubu Electric Power Co Inc Method and apparatus for diagnosing deterioration of secondary battery
JP2013137249A (en) 2011-12-28 2013-07-11 Nec Corp Method for diagnosing deterioration of secondary battery, and battery system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US652001A (en) * 1900-01-25 1900-06-19 Oscar A Keil Lock-hinge.
KR20060095279A (en) * 2005-02-28 2006-08-31 우석대학교 산학협력단 System for automatically evaluating material characteristics using acousto ultrasonics
DE202011108231U1 (en) 2011-11-24 2011-12-15 Rena Gmbh Apparatus for testing the strength of substrates

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010101706A (en) * 2008-10-22 2010-05-06 Chubu Electric Power Co Inc Method and apparatus for diagnosing deterioration of secondary battery
JP2013137249A (en) 2011-12-28 2013-07-11 Nec Corp Method for diagnosing deterioration of secondary battery, and battery system

Also Published As

Publication number Publication date
KR20150045594A (en) 2015-04-29

Similar Documents

Publication Publication Date Title
Westerhoff et al. Electrochemical impedance spectroscopy based estimation of the state of charge of lithium-ion batteries
CN106680726B (en) Method for testing cycle performance of lithium ion battery
Sood et al. Health monitoring of lithium-ion batteries
CN108761344A (en) A kind of detection method and system of lithium ion battery analysis lithium
CN108603918B (en) Device and method for testing performance of battery cell
US20150234014A1 (en) Charge control and termination of lithium sulfur cells and fuel gauging systems and methods
CN109581240A (en) Lithium ion battery failure analysis method based on AC impedence method
JP7387584B2 (en) Secondary battery test equipment and method
JP2013137249A (en) Method for diagnosing deterioration of secondary battery, and battery system
CN106198123B (en) Gas collection method for analysis of gas produced in lithium ion battery
JP2015108579A (en) Battery residual capacity estimation device, method of determining battery residual capacity and program of determining battery residual capacity
KR101653689B1 (en) Method of nondestructive stiffness inspection in battery cell and apparatus thereof
KR20150026172A (en) Method of measuring pouch depth for rechargeable battery and apparatus thereof
US9519028B2 (en) Method and system for characterizing battery cells for use in battery packs
Gilaki et al. Homogenized characterization of cylindrical Li‐ion battery cells using elliptical approximation
JP2013064697A (en) Secondary cell system
KR102259968B1 (en) Apparatus for diagnosing crack of battery pack, battery pack and vehicle including the same
Jones et al. Investigation of physical effects on prismatic lithium-ion cell electrodes after partial nail puncture using Raman spectroscopy and incremental capacity analysis
JP6897411B2 (en) How to manufacture a secondary battery
Yun et al. Experimental combined numerical approach for evaluation of battery capacity based on the initial applied stress, the real-time stress, charging open circuit voltage, and discharging open circuit voltage
JP2005251538A (en) Inspection method and device of secondary cell
JP2015050062A (en) Design method for lithium ion secondary battery
Huhman A Single-Frequency Impedance Diagnostic for State of Health Determination in Li-ion 4P1S Battery Packs
JP2010040406A (en) Electrode performance evaluation device
CN102981127A (en) Testing method for simulation temperature discharging of polymer lithium ion battery

Legal Events

Date Code Title Description
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20190625

Year of fee payment: 4