JP7487857B2 - 加圧ジグ及びそれを用いた二次電池の製造方法 - Google Patents
加圧ジグ及びそれを用いた二次電池の製造方法 Download PDFInfo
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Classifications
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M10/446—Initial charging measures
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0438—Processes of manufacture in general by electrochemical processing
- H01M4/044—Activating, forming or electrochemical attack of the supporting material
- H01M4/0445—Forming after manufacture of the electrode, e.g. first charge, cycling
- H01M4/0447—Forming after manufacture of the electrode, e.g. first charge, cycling of complete cells or cells stacks
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
図1は、本発明の一実施形態に係る加圧ジグを利用して二次電池を加圧する過程を示した模式図である。図1を参照すると、パウチ型二次電池(40)は、アルミラミネートシートで形成されたパウチ型の電池ケースに電極組立体(10)を内蔵した構造である。二次電池(40)の両側端部には、第1電極タブ(21)及び第2電極タブ(22)が露出され、電池ケースの一側に余剰部を形成する。上記電池ケースの余剰部二次電池の内部のガスが捕集されながら、ガスポケット(30)が形成される。上記ガスポケット(30)の一側を開封して、内部のガスを排出した後、再び電池を密封する過程を経ることになる。
図2は、本発明の別の一実施形態に係る加圧ジグを利用して二次電池を加圧する過程を示した模式図である。図2を参照すると、本発明では、二次電池のセル活性化工程において、加圧ジグ(200)の対向した一対の板状部材(210、220)の間に二次電池(40)を取り付け、両側から加圧及び加熱することになる。上記二次電池(40)に対する説明は、図1の説明で述べたため、ここでは省略する。
図3は、本発明の別の一実施形態に係る加圧ジグを利用して二次電池を加圧する過程を示した模式図である。図3を参照すると、本発明では、二次電池のセル活性化工程において、加圧ジグ(300)の対向した一対の板状部材(310、320)の間に二次電池(40)を取り付け、両側から加圧及び加熱することになる。上記二次電池(40)に対する説明は、図1の説明で述べたようなので、ここでは省略する。
図4は、本発明の一実施形態に係るロールプレス過程を図示した模式図である。セル活性化段階を経た二次電池について、ロールプレス段階を行うことができる。セル活性化段階を経た二次電池の内部には、一部の残存ガスが存在し得る。本発明においては、ロールプレス段階を追加で行うことによって、二次電池内に残存するガスを効果的に排出することになる。図4を参照すると、セル活性化段階を経た二次電池(60)を下から上の方向にロールプレスする。二次電池(60)の上部はガスポケット(50)が形成された構造であり、ロールプレスを経る間に二次電池(60)の内部に残存するガスは、ガスポケット(50)の方に向かって移動することになる。ロールプレスは二次電池(60)の全面をローラー(70)を通じて一方向に加圧しながら行う。上記ローラー(70)は、中心にあるローラー軸(71)を基準として回転しながら移動することになる。一方、図4には、二次電池(60)が地面と水平方向であることを示したが、これに限定されない。具体的には、二次電池(60)が地面と垂直方向に配置され得るので、二次電池(60)を下から上の方向にロールプレスする。また、ロールプレスの方向は、ガスポケット(50)から二次電池(60)の下側にロールプレスする方向ではない限り特に限定されず、二次電池(60)の両側方向(電極タブ方向)にロールプレスすることもできる。
21:第1電極タブ
22:第2電極タブ
30、50:ガスポケット
40、60:二次電池
70:ローラー
71:ローラー軸
100、200、300:加圧ジグ
110、120、210、220、310、320:板状部材
130、230、331、332:突起
Claims (8)
- 二次電池のセル活性化工程において、対向した一対の板状部材の間に二次電池を取り付け、両側から加圧するための加圧ジグであって、
前記加圧時に前記二次電池と接する面に、互いに離隔されて独立的に備えられた複数の突起を備えた一対の板状部材と、
前記板状部材に備えられた前記突起を加熱する加熱部とを含み、
前記板状部材に備えられた多数の前記突起は、ドットパターン化された形で具備された構造であり、
前記板状部材に備えられた前記突起は、
前記板状部材と平行する断面形状が円形または楕円形であり、
ドットパターン化された形で具備された多数の前記突起は、
平均直径D1の突起と平均直径D2の突起とが混在した構造であり、
前記平均直径D1と前記平均直径D2の割合(D1/D2)が2~100の範囲にあり、
前記平均直径がD1である突起と前記平均直径がD2である突起の形成面積の割合(平均直径がD1である突起の形成面積/平均直径がD2である突起の形成面積)は、0.1~1.5の範囲にあり、
前記平均直径D1は、50~200mmの範囲にあり、前記平均直径D2は1~100mmの範囲にあり、
前記加熱部は板状部材に実装されたヒーティングコイルを含む、加圧ジグ。 - 前記板状部材に備えられた前記突起は、
前記板状部材と垂直な断面形状を基準として、前記板状部材と接する側である下部直径が前記二次電池と接する側である上部直径と同等であるか或いは大きい、請求項1に記載の加圧ジグ。 - 前記板状部材に備えられた前記突起は、
前記板状部材と垂直な断面形状が四角形、三角形、半円形または台形の形である、請求項2に記載の加圧ジグ。 - 請求項1から3のいずれか一項に記載の加圧ジグで加熱及び加圧をしながら二次電池に対するセル活性化の過程を行うセル活性化段階を含む、二次電池の製造方法。
- 前記セル活性化段階の後に、
セル活性化された前記二次電池を加圧して前記二次電池の内部のガスを除去するガス除去段階をさらに含む、請求項4に記載の二次電池の製造方法。 - 前記ガス除去段階は、
対向した一対の板状部材の間に前記二次電池を取り付け、両側から加圧して行う、請求項5に記載の二次電池の製造方法。 - 前記ガス除去段階は、
前記二次電池を一方向にロールプレスして行う、請求項5に記載の二次電池の製造方法。 - 前記二次電池はパウチ型の二次電池である、請求項4から7のいずれか一項に記載の二次電池の製造方法。
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