WO2013047994A2 - Battery cell and battery module - Google Patents

Battery cell and battery module Download PDF

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Publication number
WO2013047994A2
WO2013047994A2 PCT/KR2012/006190 KR2012006190W WO2013047994A2 WO 2013047994 A2 WO2013047994 A2 WO 2013047994A2 KR 2012006190 W KR2012006190 W KR 2012006190W WO 2013047994 A2 WO2013047994 A2 WO 2013047994A2
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WO
WIPO (PCT)
Prior art keywords
battery cell
battery
pouch
temperature sensor
electrode body
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PCT/KR2012/006190
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French (fr)
Korean (ko)
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WO2013047994A3 (en
Inventor
민재윤
김은진
Original Assignee
에스케이이노베이션 주식회사
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Publication of WO2013047994A2 publication Critical patent/WO2013047994A2/en
Publication of WO2013047994A3 publication Critical patent/WO2013047994A3/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery cell and a battery module capable of accurately measuring the temperature of an electrode body configured inside a pouch.
  • secondary batteries unlike primary batteries, can be charged and discharged and applied to various fields such as digital cameras, mobile phones, laptops, and hybrid cars, and active research is being conducted.
  • secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries.
  • Lithium secondary batteries can be manufactured in various forms, and typical shapes include cylindrical and prismatic types, which are mainly used in lithium ion batteries.
  • Lithium polymer batteries which have recently been in the spotlight, have a pouch type with flexibility. (pouched type), the shape is relatively free.
  • the secondary battery has a high temperature inside the battery cell due to repeated charging and discharging, resulting in deterioration of the battery cell, or shortening of life, or explosion and ignition due to swelling phenomenon caused by gas generation in the pouch. There is a risk.
  • an object of the present invention is a battery cell protruding positive electrode tab and negative electrode tab to one side of the electrode body; A pouch for sealing the electrode body so that the positive electrode tab and the negative electrode tab of the battery cell are drawn out to the outside; And a temperature sensor provided inside the pouch and connected to a sensing line connected to the outside of the pouch. It comprises a, it is to provide a battery cell that can accurately measure the temperature of the electrode body configured in the pouch.
  • the sensing line of the temperature sensor is connected to a battery management system (BMS), so that the charging current of the battery cell is controlled according to the temperature measured by the temperature sensor to prevent the overcharge and over-discharge of the battery cell It is to provide a battery cell and a battery module.
  • BMS battery management system
  • the battery cell with a built-in temperature sensor of the present invention for achieving the above object, the battery cell protruding positive electrode tab and negative electrode tab to one side of the electrode body; A pouch for sealing the electrode body so that the positive electrode tab and the negative electrode tab of the battery cell are drawn out to the outside; And a temperature sensor provided inside the pouch and connected to a sensing line connected to the outside of the pouch. Characterized in that comprises a.
  • the sensing line of the temperature sensor is connected to a battery management system (BMS), characterized in that the charging current of the battery cell is controlled according to the temperature measured by the temperature sensor.
  • BMS battery management system
  • the sensing line of the temperature sensor of the battery cells is connected to a battery management system (BMS), and the battery cells according to respective temperatures measured by the temperature sensors.
  • BMS battery management system
  • the battery cell of the present invention is provided with a temperature sensor inside the pouch, it is possible to accurately measure the temperature change of the battery cell generated by the charge and discharge of the battery cell, the sensing line of the temperature sensor is a battery management system (BMS) Is connected to, by controlling the charging current of the battery cell in accordance with the temperature measured by the temperature sensor, there is an advantage that can prevent the overcharge and over-discharge of the battery cell.
  • BMS battery management system
  • the battery module formed by stacking a plurality of battery cells of the present invention has the advantage that the charging current of the battery cells can be controlled to charge or discharge the respective battery cells efficiently.
  • FIG. 1 is a perspective view showing a battery cell of the present invention.
  • FIG. 2 is a cross-sectional view along AA ′ in FIG. 1.
  • 3 and 4 is an exploded perspective view and an assembled perspective view showing a battery module laminated battery cells of the present invention.
  • FIG. 1 is a perspective view showing a battery cell of the present invention.
  • the battery cell 1000 of the present invention includes a battery cell 100 in which the positive electrode tab 121 and the negative electrode tab 122 protrude to one side of the electrode body 110; A pouch 200 for wrapping and sealing the electrode body 110 such that the positive electrode tab 121 and the negative electrode tab 122 of the battery cell 100 are drawn out to the outside; And a temperature sensor 300 provided inside the pouch 200 and configured to connect the sensing line 310 to the outside of the pouch. It is made, including.
  • the battery cell 100 is a portion capable of charging or discharging electricity, and is connected to the positive electrode tab 121 and the negative electrode at one side thereof so as to be connected to the positive electrode plate and the negative electrode plate of the electrode body 110 including a positive electrode plate, a negative electrode plate, a separator, and an electrolyte.
  • the tab 122 protrudes.
  • the battery cell 100 is formed in a shape surrounding the outer surface of the battery cell 100 so that the battery cell 100 is sealed by the pouch 200.
  • the pouch 200 is formed such that the electrode tab 120 extending to one side of the electrode body 110 is drawn out of the pouch 200.
  • the battery cell 100 is formed by extending the positive electrode tab 121 and the negative electrode tab 122 to one side of the electrode body 110, the pouch 200 and the positive electrode tab 121 It is formed in such a way as to surround only the electrode body 110 except for the negative electrode tab 122.
  • the pouch 200 is formed to seal the electrode body 110, so that the edge of the pouch 200 is sealed by heat fusion in the state in which the battery cell 100 is inserted into the pouch 200. Can be formed.
  • the pouch 200 may be made of an aluminum laminate packaging material
  • the aluminum laminate packaging material is a packaging material made of a thin and flexible form by depositing a plastic thin film such as polyethylene (PE) on a thin aluminum (Al) plate, the battery cell Insulation with (100) can be ensured, and the electrode tab 120 is drawn out to the outside through heat fusion, thereby facilitating sealing.
  • PE polyethylene
  • Al thin aluminum
  • the pouch 200 may be a case of a type that encloses and seals the electrode body 110 of the battery cell 100. That is, according to the shape of the battery cell 100, the electrode tab 120 may be formed in a case such as a square or circle shape surrounding the electrode body 110 to be drawn out.
  • the temperature sensor 300 is provided inside the pouch 200, and the sensing line 310 connected to the temperature sensor 300 is configured to be drawn out of the pouch 200.
  • the sensing line 310 is also formed so as to seal a portion through which the sensing line 310 passes when the edge portion of the pouch 200 is sealed, and the battery cell 100 inside the pouch 200.
  • the electrode body 110 and the temperature sensor 300 are accommodated and the electrode tab 120 and the sensing line 310 are formed to be drawn out of the pouch 200.
  • the temperature sensor 300 is provided in the inside of the pouch 200, as shown in Figs. 1 and 2 is located in the empty space inside the pouch 200 on the upper side of the electrode body 110, the overall thickness May be thinly formed, and may be configured such that the temperature sensor 300 is in contact with the electrode body 110.
  • the temperature sensor 300 may be provided between the positive electrode tab 121 and the negative electrode tab 122 of the battery cell 100 inside the pouch 200, and the electrode body 110 may be provided. It may be provided at various positions around the electrode body 110 or the upper side of the).
  • the temperature sensor 300 may be a thermocouple, and other types of temperature sensors may be used.
  • the battery cell 1000 of the present invention can accurately measure the temperature change of the battery cell generated by charging and discharging the battery cell.
  • the sensing line 310 of the temperature sensor 300 is connected to a battery management system (BMS), so that the charging current of the battery cell 100 is controlled according to the temperature measured by the temperature sensor 300.
  • BMS battery management system
  • the battery cell 1000 of the present invention is configured to be stacked using the case 1100 and the cover 1200 as shown in FIGS. 3 and 4, and the electrode tabs 120 are connected in series or in parallel to form a battery pack or a battery.
  • Module 2000 may be configured.
  • each of the battery cells 1000 of the battery module 2000 has a temperature sensor 300 built-in and the sensing line 310 is connected to the BMS, to control the charging current according to the temperature of each of the battery cells 1000
  • the plurality of battery cells 1000 may be evenly charged or discharged. That is, the temperature sensor 300 embedded in each battery cell 1000 of the battery module 2000 is connected to the BMS, and detects the rising temperature of each battery cell when the battery module is charged and discharged to set a preset temperature. When exceeded, the information may be sent to the BMS to control the charging or discharging of each battery cell.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

The present invention relates to a battery cell and a battery module comprising: a battery cell having a positive tab and a negative tab formed so as to project toward one side of an electrode body; a pouch enclosing and sealing the electrode body such that the positive tab and the negative tab of the battery cell are withdrawn to the outside; and a temperature sensor provided inside the pouch, and having a sensing line connected thereto that is formed so as to be withdrawn to the outside of the pouch, wherein the temperature of the electrode body configured inside the pouch can be accurately measured.

Description

배터리 셀 및 배터리 모듈Battery cells and battery modules
본 발명은 파우치 내부에 구성되는 전극체의 온도를 정확하게 측정할 수 있는 배터리 셀 및 배터리 모듈에 관한 것이다.The present invention relates to a battery cell and a battery module capable of accurately measuring the temperature of an electrode body configured inside a pouch.
일반적으로, 이차전지는 일차전지와는 달리 충전 및 방전이 가능하여 디지털 카메라, 휴대폰, 노트북, 하이브리드카와 같은 다양한 분야에 적용되며 활발한 연구가 진행중이다. 이차전지로는 니켈-카드뮴 전지, 니켈-메탈 하이드라이드 전지, 니켈-수소 전지, 리튬 이차전지를 들 수 있다.In general, secondary batteries, unlike primary batteries, can be charged and discharged and applied to various fields such as digital cameras, mobile phones, laptops, and hybrid cars, and active research is being conducted. Examples of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries.
이러한 이차전지 중에서도 높은 에너지 밀도와 방전 전압을 가진 리튬 이차전지에 대한 많은 연구가 행해지고 있고 또한 상용화되어 널리 사용되고 있다.Among these secondary batteries, many researches on lithium secondary batteries having high energy density and discharge voltage have been conducted and commercialized and widely used.
리튬 이차전지는 다양한 형태로 제조가능한데, 대표적인 형상으로는 리튬 이온 전지에 주로 사용되는 원통형(cylinder type) 및 각형(prismatic type)을 들 수 있으며, 최근 들어 각광받는 리튬 폴리머 전지는 유연성을 지닌 파우치형(pouched type)으로 제조되어서, 그 형상이 비교적 자유롭다.Lithium secondary batteries can be manufactured in various forms, and typical shapes include cylindrical and prismatic types, which are mainly used in lithium ion batteries. Lithium polymer batteries, which have recently been in the spotlight, have a pouch type with flexibility. (pouched type), the shape is relatively free.
그런데 이러한 이차 전지는 충,방전이 반복되면서 전지 셀 내부의 온도가 상승되어 배터리 셀의 열화가 발생하여 수명이 단축되거나, 또는 파우치 내부에서 가스가 발생하여 부풀어 오르는 스웰링 현상 등으로 인해 폭발 및 발화의 위험성이 존재한다.However, the secondary battery has a high temperature inside the battery cell due to repeated charging and discharging, resulting in deterioration of the battery cell, or shortening of life, or explosion and ignition due to swelling phenomenon caused by gas generation in the pouch. There is a risk.
그러므로 이러한 문제점들을 해결하기 위해 전지 셀의 온도를 측정하고 이에 따라 충전 및 방전 전류를 제어하는 다양한 기술들이 개발되어 있다.Therefore, in order to solve these problems, various techniques for measuring the temperature of the battery cell and controlling the charge and discharge currents have been developed.
그런데 종래의 기술들은 온도센서가 배터리 셀의 표면에 부착되어 온도를 측정하므로, 실제로 열이 발생하는 전극체를 감싸고 있는 케이스 또는 파우치의 외부에서는 전극체의 정확한 온도를 측정하기 어려워 배터리 셀의 열화가 발생하고 수명이 단축되는 문제점이 있다.However, in the related art, since a temperature sensor is attached to the surface of a battery cell to measure temperature, it is difficult to accurately measure the temperature of the electrode body outside the case or pouch surrounding the electrode body that actually generates heat. There is a problem that occurs and the life is shortened.
[선행기술문헌][Preceding technical literature]
[특허문헌][Patent Documents]
KR 10-0680854 B1 (2007.02.02.) 도2KR 10-0680854 B1 (2007.02.02.) Figure 2
본 발명은 상술한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 전극체의 일측으로 양극탭 및 음극탭이 돌출 형성되는 전지 셀; 상기 전지 셀의 양극탭 및 음극탭이 외부로 인출되도록 상기 전극체를 감싸 밀봉하는 파우치; 및 상기 파우치의 내부에 구비되며, 연결되는 센싱라인이 상기 파우치의 외부로 인출되도록 형성되는 온도센서; 를 포함하여 이루어져, 상기 파우치 내부에 구성되는 상기 전극체의 온도를 정확하게 측정할 수 있도록 하는 배터리 셀을 제공하는 것이다.The present invention has been made to solve the above problems, an object of the present invention is a battery cell protruding positive electrode tab and negative electrode tab to one side of the electrode body; A pouch for sealing the electrode body so that the positive electrode tab and the negative electrode tab of the battery cell are drawn out to the outside; And a temperature sensor provided inside the pouch and connected to a sensing line connected to the outside of the pouch. It comprises a, it is to provide a battery cell that can accurately measure the temperature of the electrode body configured in the pouch.
또한, 상기 온도센서의 센싱라인은 배터리 관리 시스템(BMS)에 연결되어, 상기 온도센서에서 측정되는 온도에 따라 상기 전지 셀의 충전 전류가 제어되도록 하여 전지 셀의 과충전 및 과방전을 방지할 수 있는 배터리 셀 및 배터리 모듈을 제공하는 것이다.In addition, the sensing line of the temperature sensor is connected to a battery management system (BMS), so that the charging current of the battery cell is controlled according to the temperature measured by the temperature sensor to prevent the overcharge and over-discharge of the battery cell It is to provide a battery cell and a battery module.
상기한 바와 같은 목적을 달성하기 위한 본 발명의 온도센서가 내장된 배터리 셀은, 전극체의 일측으로 양극탭 및 음극탭이 돌출 형성되는 전지 셀; 상기 전지 셀의 양극탭 및 음극탭이 외부로 인출되도록 상기 전극체를 감싸 밀봉하는 파우치; 및 상기 파우치의 내부에 구비되며, 연결되는 센싱라인이 상기 파우치의 외부로 인출되도록 형성되는 온도센서; 를 포함하여 이루어지는 것을 특징으로 한다.The battery cell with a built-in temperature sensor of the present invention for achieving the above object, the battery cell protruding positive electrode tab and negative electrode tab to one side of the electrode body; A pouch for sealing the electrode body so that the positive electrode tab and the negative electrode tab of the battery cell are drawn out to the outside; And a temperature sensor provided inside the pouch and connected to a sensing line connected to the outside of the pouch. Characterized in that comprises a.
또한, 상기 온도센서의 센싱라인은 배터리 관리 시스템(BMS)에 연결되어, 상기 온도센서에서 측정되는 온도에 따라 상기 전지 셀의 충전 전류가 제어되는 것을 특징으로 한다.In addition, the sensing line of the temperature sensor is connected to a battery management system (BMS), characterized in that the charging current of the battery cell is controlled according to the temperature measured by the temperature sensor.
또한, 배터리 셀이 다수개가 적층 배열되는 배터리 모듈에 있어서, 상기 배터리 셀들의 온도센서의 센싱라인은 배터리 관리 시스템(BMS)에 연결되어, 상기 온도센서들에서 측정되는 각각의 온도에 따라 상기 전지 셀들의 충전 전류가 각각 제어되는 것을 특징으로 한다.In addition, in a battery module in which a plurality of battery cells are stacked and arranged, the sensing line of the temperature sensor of the battery cells is connected to a battery management system (BMS), and the battery cells according to respective temperatures measured by the temperature sensors. These charging currents are characterized in that each is controlled.
본 발명의 배터리 셀은, 파우치의 내부에 온도센서가 구비되므로 전지 셀의 충방전에 의해 발생하는 전지 셀의 온도 변화를 정확하게 측정할 수 있으며, 상기 온도센서의 센싱라인이 배터리 관리 시스템(BMS)에 연결되어, 상기 온도센서에서 측정되는 온도에 따라 상기 전지 셀의 충전 전류가 제어되도록 함으로써, 전지 셀의 과충전 및 과방전을 방지할 수 있는 장점이 있다.Since the battery cell of the present invention is provided with a temperature sensor inside the pouch, it is possible to accurately measure the temperature change of the battery cell generated by the charge and discharge of the battery cell, the sensing line of the temperature sensor is a battery management system (BMS) Is connected to, by controlling the charging current of the battery cell in accordance with the temperature measured by the temperature sensor, there is an advantage that can prevent the overcharge and over-discharge of the battery cell.
또한, 본 발명의 다수개의 배터리 셀이 적층 배열되어 형성되는 배터리 모듈은, 배터리 셀들의 충전 전류가 각각 제어되어 각각의 배터리 셀들을 효율적으로 충전 또는 방전시킬 수 있는 장점 있다.In addition, the battery module formed by stacking a plurality of battery cells of the present invention has the advantage that the charging current of the battery cells can be controlled to charge or discharge the respective battery cells efficiently.
도 1은 본 발명의 배터리 셀을 나타낸 사시도.1 is a perspective view showing a battery cell of the present invention.
도 2는 도 1의 AA` 방향 단면도.FIG. 2 is a cross-sectional view along AA ′ in FIG. 1.
도 3 및 도 4는 본 발명의 배터리 셀이 적층 구성되는 배터리 모듈을 나타낸 분해사시도 및 조립사시도.3 and 4 is an exploded perspective view and an assembled perspective view showing a battery module laminated battery cells of the present invention.
이하, 상기한 바와 같은 본 발명의 배터리 셀 및 배터리 모듈을 첨부된 도면을 참고하여 상세하게 설명한다.Hereinafter, a battery cell and a battery module of the present invention as described above will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 배터리 셀을 나타낸 사시도이다.1 is a perspective view showing a battery cell of the present invention.
도시된 바와 같이 본 발명의 배터리 셀(1000)은, 전극체(110)의 일측으로 양극탭(121) 및 음극탭(122)이 돌출 형성되는 전지 셀(100); 상기 전지 셀(100)의 양극탭(121) 및 음극탭(122)이 외부로 인출되도록 상기 전극체(110)를 감싸 밀봉하는 파우치(200); 및 상기 파우치(200)의 내부에 구비되며, 연결되는 센싱라인(310)이 상기 파우치의 외부로 인출되도록 형성되는 온도센서(300); 를 포함하여 이루어진다.As shown, the battery cell 1000 of the present invention includes a battery cell 100 in which the positive electrode tab 121 and the negative electrode tab 122 protrude to one side of the electrode body 110; A pouch 200 for wrapping and sealing the electrode body 110 such that the positive electrode tab 121 and the negative electrode tab 122 of the battery cell 100 are drawn out to the outside; And a temperature sensor 300 provided inside the pouch 200 and configured to connect the sensing line 310 to the outside of the pouch. It is made, including.
우선, 상기 전지 셀(100)은 전기를 충전 또는 방전할 수 있는 부분으로 양극판, 음극판, 분리막 및 전해질 등으로 이루어지는 전극체(110)의 양극판과 음극판에 연결되도록 일측으로 양극탭(121) 및 음극탭(122)이 돌출 형성된다.First, the battery cell 100 is a portion capable of charging or discharging electricity, and is connected to the positive electrode tab 121 and the negative electrode at one side thereof so as to be connected to the positive electrode plate and the negative electrode plate of the electrode body 110 including a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The tab 122 protrudes.
그리고 상기 전지 셀(100)은 상기 파우치(200)에 의해 밀봉되도록, 상기 파우치(200)가 상기 전지 셀(100)의 외면을 둘러싸는 형태로 형성된다.The battery cell 100 is formed in a shape surrounding the outer surface of the battery cell 100 so that the battery cell 100 is sealed by the pouch 200.
이때, 상기 파우치(200)는 상기 전극체(110)의 일측으로 연장 형성되는 전극탭(120)이 상기 파우치(200)의 외부로 인출되도록 형성된다.In this case, the pouch 200 is formed such that the electrode tab 120 extending to one side of the electrode body 110 is drawn out of the pouch 200.
즉, 상기 전지 셀(100)은 상기 전극체(110)에 그 일측으로 양극탭(121) 및 음극탭(122)이 연장 형성되어 이루어지며, 상기 파우치(200)가 상기 양극탭(121)과 음극탭(122)을 제외한 상기 전극체(110)만을 밀봉하도록 감싸는 형태로 이루어진다.That is, the battery cell 100 is formed by extending the positive electrode tab 121 and the negative electrode tab 122 to one side of the electrode body 110, the pouch 200 and the positive electrode tab 121 It is formed in such a way as to surround only the electrode body 110 except for the negative electrode tab 122.
또한, 상기 파우치(200)는 상기 전극체(110)를 밀봉하도록 형성되는데, 상기 파우치(200) 내부에 상기 전지 셀(100)을 넣은 상태에서 상기 파우치(200)의 가장자리를 열 융착하여 밀봉되도록 형성될 수 있다.In addition, the pouch 200 is formed to seal the electrode body 110, so that the edge of the pouch 200 is sealed by heat fusion in the state in which the battery cell 100 is inserted into the pouch 200. Can be formed.
이때, 상기 파우치(200)는 알루미늄 라미네이트 포장재로 이루어질 수 있으며, 상기 알루미늄 라미네이트 포장재는 얇은 알루미늄(Al) 판에 폴리에틸렌(PE)과 같은 플라스틱 박막을 증착하여 얇고 유연한 형태로 만든 포장재로서, 상기 전지 셀(100)과의 절연을 확보할 수 있고, 열융착을 통해 상기 전극탭(120)이 외부로 인출되도록 하여 밀봉이 용이하다.In this case, the pouch 200 may be made of an aluminum laminate packaging material, the aluminum laminate packaging material is a packaging material made of a thin and flexible form by depositing a plastic thin film such as polyethylene (PE) on a thin aluminum (Al) plate, the battery cell Insulation with (100) can be ensured, and the electrode tab 120 is drawn out to the outside through heat fusion, thereby facilitating sealing.
또한, 상기 파우치(200)는 상기 전지 셀(100)의 전극체(110)를 감싸 밀봉하는 형태의 케이스가 될 수도 있다. 즉, 상기 전지 셀(100)의 형태에 따라 상기 전극탭(120)이 외부로 인출되도록 전극체(110)를 감싸는 형태의 각형 또는 원형 등의 케이스로 형성될 수도 있다.In addition, the pouch 200 may be a case of a type that encloses and seals the electrode body 110 of the battery cell 100. That is, according to the shape of the battery cell 100, the electrode tab 120 may be formed in a case such as a square or circle shape surrounding the electrode body 110 to be drawn out.
그리고 상기 온도센서(300)는 상기 파우치(200) 내부에 구비되며, 상기 온도센서(300)에 연결된 센싱라인(310)이 상기 파우치(200)의 외부로 인출되도록 구성된다.In addition, the temperature sensor 300 is provided inside the pouch 200, and the sensing line 310 connected to the temperature sensor 300 is configured to be drawn out of the pouch 200.
이때, 상기 센싱라인(310) 역시 상기 파우치(200)의 테두리 부분이 밀봉될 때 상기 센싱라인(310)이 통과되는 부분도 밀폐되도록 형성되어, 상기 파우치(200) 내부에 상기 전지 셀(100)의 전극체(110) 및 온도센서(300)가 수용되고 상기 전극탭(120) 및 센싱라인(310)이 상기 파우치(200)의 외부로 인출되도록 형성된다.In this case, the sensing line 310 is also formed so as to seal a portion through which the sensing line 310 passes when the edge portion of the pouch 200 is sealed, and the battery cell 100 inside the pouch 200. The electrode body 110 and the temperature sensor 300 are accommodated and the electrode tab 120 and the sensing line 310 are formed to be drawn out of the pouch 200.
또한, 상기 온도센서(300)는 상기 파우치(200)의 내부에 구비되는데, 도 1 및 도 2와 같이 상기 전극체(110)의 상측에 상기 파우치(200) 내부의 빈 공간에 위치되어 전체적인 두께가 얇게 형성될 수 있으며, 상기 전극체(110)에 상기 온도센서(300)가 접촉되도록 구성될 수도 있다.In addition, the temperature sensor 300 is provided in the inside of the pouch 200, as shown in Figs. 1 and 2 is located in the empty space inside the pouch 200 on the upper side of the electrode body 110, the overall thickness May be thinly formed, and may be configured such that the temperature sensor 300 is in contact with the electrode body 110.
이때, 도시된 바와 같이 상기 온도센서(300)가 상기 파우치(200) 내부의 상기 전지 셀(100)의 양극탭(121)과 음극탭(122) 사이에 구비될 수 있으며, 상기 전극체(110)의 상측 또는 상기 전극체(110) 둘레의 다양한 위치에 구비될 수도 있다.In this case, as illustrated, the temperature sensor 300 may be provided between the positive electrode tab 121 and the negative electrode tab 122 of the battery cell 100 inside the pouch 200, and the electrode body 110 may be provided. It may be provided at various positions around the electrode body 110 or the upper side of the).
그리고 상기 온도센서(300)는 서모커플이 사용될 수 있으며, 이외 다른 종류의 온도센서가 사용될 수도 있다.The temperature sensor 300 may be a thermocouple, and other types of temperature sensors may be used.
이와 같이 본 발명의 배터리 셀(1000)은 상기 파우치(200)의 내부에 온도센서(300)가 구비됨으로써, 전지 셀의 충,방전에 의해 발생하는 전지 셀의 온도 변화를 정확하게 측정할 수 있다.As described above, since the temperature sensor 300 is provided inside the pouch 200, the battery cell 1000 of the present invention can accurately measure the temperature change of the battery cell generated by charging and discharging the battery cell.
또한, 상기 온도센서(300)의 센싱라인(310)은 배터리 관리 시스템(BMS)에 연결되어, 상기 온도센서(300)에서 측정되는 온도에 따라 상기 전지 셀(100)의 충전 전류가 제어되도록 할 수 있다.In addition, the sensing line 310 of the temperature sensor 300 is connected to a battery management system (BMS), so that the charging current of the battery cell 100 is controlled according to the temperature measured by the temperature sensor 300. Can be.
즉, 전지 셀(100)의 온도를 정확하게 측정하여 적정한 온도 범위를 유지하도록 충전 또는 방전 전류를 조절하여 전지 셀(100)의 열화를 방지함으로써, 배터리 셀의 수명이 단축되는 것을 방지할 수 있다.That is, by accurately measuring the temperature of the battery cell 100 to prevent the deterioration of the battery cell 100 by controlling the charge or discharge current to maintain an appropriate temperature range, it is possible to prevent the life of the battery cell is shortened.
또한, 과충전 및 과방전을 방지할 수 있어 폭발 및 발화의 위험을 줄일 수 있다.In addition, it is possible to prevent overcharge and overdischarge to reduce the risk of explosion and fire.
그리고 본 발명의 배터리 셀(1000)은 도 3 및 도 4와 같이 케이스(1100) 및 커버(1200)등을 이용하여 적층되도록 구성하고, 전극탭(120)을 직렬 또는 병렬 연결하여 배터리 팩 또는 배터리 모듈(2000)로 구성될 수 있다.The battery cell 1000 of the present invention is configured to be stacked using the case 1100 and the cover 1200 as shown in FIGS. 3 and 4, and the electrode tabs 120 are connected in series or in parallel to form a battery pack or a battery. Module 2000 may be configured.
이때, 배터리 모듈(2000)의 각각의 배터리 셀(1000)에는 온도센서(300)가 내장되고 센싱라인(310)이 BMS와 연결되어, 배터리 셀(1000)의 각각의 온도에 따라 충전 전류를 제어하여 다수개의 배터리 셀(1000)이 고르게 충전 또는 방전되도록 할 수 있다. 즉, 배터리 모듈(2000)의 각 배터리 셀(1000)에 내장된 온도센서(300)가 BMS에 연결되어, 배터리 모듈이 충,방전될 때 각 배터리 셀의 상승하는 온도를 감지하여 기 설정된 온도를 초과시, 그 정보를 BMS로 전송하여 각각의 배터리 셀의 충전 또는 방전을 제어하도록 구성될 수 있다.In this case, each of the battery cells 1000 of the battery module 2000 has a temperature sensor 300 built-in and the sensing line 310 is connected to the BMS, to control the charging current according to the temperature of each of the battery cells 1000 The plurality of battery cells 1000 may be evenly charged or discharged. That is, the temperature sensor 300 embedded in each battery cell 1000 of the battery module 2000 is connected to the BMS, and detects the rising temperature of each battery cell when the battery module is charged and discharged to set a preset temperature. When exceeded, the information may be sent to the BMS to control the charging or discharging of each battery cell.
본 발명은 상기한 실시 예에 한정되지 아니하며, 적용범위가 다양함은 물론이고, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이다.The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.
[부호의 설명][Description of the code]
1000 : 배터리 셀1000: Battery Cell
100 : 전지 셀 110 : 전극체100 battery cell 110 electrode body
120 : 전극탭120: electrode tab
121 : 양극탭 122 : 음극탭121: positive electrode tab 122: negative electrode tab
200 : 파우치200: pouch
300 : 온도센서 310 : 센싱라인300: temperature sensor 310: sensing line
1100 : 케이스1100: Case
1200 : 커버1200: Cover
2000 : 배터리 모듈2000: Battery Module

Claims (3)

  1. 전극체의 일측으로 양극탭 및 음극탭이 돌출 형성되는 전지 셀;A battery cell in which a positive electrode tab and a negative electrode tab protrude to one side of the electrode body;
    상기 전지 셀의 양극탭 및 음극탭이 외부로 인출되도록 상기 전극체를 감싸 밀봉하는 파우치; 및A pouch for sealing the electrode body so that the positive electrode tab and the negative electrode tab of the battery cell are drawn out to the outside; And
    상기 파우치의 내부에 구비되며, 연결되는 센싱라인이 상기 파우치의 외부로 인출되도록 형성되는 온도센서; 를 포함하여 이루어지는 것을 특징으로 하는 배터리 셀.A temperature sensor provided in the pouch and connected to a sensing line connected to the outside of the pouch; A battery cell comprising a.
  2. 제1항에 있어서,The method of claim 1,
    상기 온도센서의 센싱라인은 배터리 관리 시스템(BMS)에 연결되어, 상기 온도센서에서 측정되는 온도에 따라 상기 전지 셀의 충전 전류가 제어되는 것을 특징으로 하는 배터리 셀.The sensing line of the temperature sensor is connected to a battery management system (BMS), the battery cell, characterized in that the charging current of the battery cell is controlled according to the temperature measured by the temperature sensor.
  3. 제1항의 배터리 셀이 다수개가 적층 배열되는 배터리 모듈에 있어서,The battery module of claim 1, wherein a plurality of battery cells are stacked and arranged,
    상기 배터리 셀들의 온도센서의 센싱라인은 배터리 관리 시스템(BMS)에 연결되어, 상기 온도센서들에서 측정되는 각각의 온도에 따라 상기 전지 셀들의 충전 전류가 각각 제어되는 것을 특징으로 하는 배터리 모듈.The sensing line of the temperature sensor of the battery cells is connected to a battery management system (BMS), the battery module, characterized in that the charging current of the battery cells is controlled in accordance with each temperature measured by the temperature sensors.
PCT/KR2012/006190 2011-09-28 2012-08-03 Battery cell and battery module WO2013047994A2 (en)

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CN111630705B (en) * 2018-03-23 2023-08-11 重庆金康新能源汽车有限公司 Battery cell for battery pack in electric vehicle
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