JP7092846B2 - プライマー層組成物、これを用いた二次電池パウチフィルム、及びその製造方法 - Google Patents
プライマー層組成物、これを用いた二次電池パウチフィルム、及びその製造方法 Download PDFInfo
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- JP7092846B2 JP7092846B2 JP2020181990A JP2020181990A JP7092846B2 JP 7092846 B2 JP7092846 B2 JP 7092846B2 JP 2020181990 A JP2020181990 A JP 2020181990A JP 2020181990 A JP2020181990 A JP 2020181990A JP 7092846 B2 JP7092846 B2 JP 7092846B2
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- secondary battery
- battery pouch
- pouch film
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Description
[課題番号]20007148
[部処名]産業通商資源部
[課題管理(専門)機関名]韓国産業技術評価管理院
[研究事業名]素材部品技術開発―素材部品パッケージ型
[研究課題名]中大型用二次電池パウチの性能評価及び需要業体への適用実証研究
[寄与率]1/1
[課題遂行機関名]ユルチョン化学株式会社
[研究期間]2019.09.01~2021.02.28
本明細書において二次電池パウチフィルムの各層が順に含まれる場合、必ずしも当該層だけで構成されることではなく、他の層が更に含まれてよい。
以下、本発明の例示的な具現例について詳述する。
図1に示されたように、二次電池パウチの製造の際に基材層(PET/ナイロン)とAl腐食防止層を形成したAl金属層とを先に貼り合わせ、最後の工程で前記基材層と金属層(Al腐食防止層が形成されたAl金属層)とが貼り合わされてなる原反にシーラント層(CPPフィルム)を貼り合わせた。シーラント層を貼り合わせる際に金属層にプライマー層を形成させるためにエマルジョンコーティング及び乾燥工程を施してからシーラント層を貼り合わせて二次電池パウチフィルムを製作した。一方、シーラント層を貼り合わせる際に溶融押出樹脂層としてポリプロピレンを押し出して更に形成してもよい。
(比較例2)開始温度が175~190℃である2液型溶剤系エマルジョンを乾燥工程温度120℃に設定して二次電池パウチフィルムを製作した。
(比較例3)開始温度が175~190℃である2液型溶剤系エマルジョンを乾燥工程温度135℃に設定して二次電池パウチフィルムを製作した。
(比較例4)開始温度が175~190℃である2液型溶剤系エマルジョンを乾燥工程温度150℃に設定して二次電池パウチフィルムを製作した。
(比較例5)開始温度が175~190℃である2液型溶剤系エマルジョンを乾燥工程温度165℃に設定して二次電池パウチフィルムを製作した。
(比較例6)開始温度が175~190℃である2液型溶剤系エマルジョンを乾燥工程温度180℃に設定して二次電池パウチフィルムを製作した。
(比較例7)開始温度が175~190℃である2液型溶剤系エマルジョンを乾燥工程温度200℃に設定して二次電池パウチフィルムを製作した。
(実施例1)開始温度を135~150℃に下げた2液型溶剤系エマルジョンを工程温度100℃に設定して二次電池パウチフィルムを製作した。
(実施例2)開始温度を135~150℃に下げた2液型溶剤系エマルジョンを工程温度120℃に設定して二次電池パウチフィルムを製作した。
(実施例3)開始温度を135~150℃に下げた2液型溶剤系エマルジョンを工程温度135℃に設定して二次電池パウチフィルムを製作した。
(実施例4)開始温度を135~150℃に下げた2液型溶剤系エマルジョンを工程温度150℃に設定して二次電池パウチフィルムを製作した。
(比較例8)開始温度を135~150℃に下げた2液型溶剤系エマルジョンを工程温度165℃に設定して二次電池パウチフィルムを製作した。
(比較例9)開始温度を135~150℃に下げた2液型溶剤系エマルジョンを工程温度180℃に設定して二次電池パウチフィルムを製作した。
(比較例10)開始温度を135~150℃に下げた2液型溶剤系エマルジョンを工程温度200℃に設定して二次電池パウチフィルムを製作した。
<初期剥離強度評価>
(1)二次電池パウチフィルムを横1.5cm、縦15cmに切って試片を用意した。
(2)金属層とシーラント層とを剥離して剥離強度を測定した。
(1)二次電池パウチフィルムを横10cm、縦20cmに切ってから両側2面を熱接着した。
(2)2面が接着された二次電池パウチの内部に製造溶液(電解液+水(溶液中の水の濃度が10,000ppm(約1%)))を入れて熱接着してパックを製造した。
(3)高温条件(85℃)で24時間保管した。
(4)パック内部の電解液を廃棄し、前述した初期剥離強度評価と同様にして試料を用意した(横1.5cm、縦15cm)。
(5)金属層とシーラント層との間の剥離強度を測定した。
(1)二次電池パウチフィルムを横1.5cm、縦15cmに切って試片を用意した。
(2)用意した試片を標準電解液(1.0M LiPF6(EC/DEC/EMC:1/1/1)に含浸し、高温条件(85℃)で24時間保管した。
(3)電解液を洗浄後に金属層とシーラント層とを剥離して剥離強度を測定した。
(1)製作された二次電池パウチフィルムをそれぞれ15cm×15cmの大きさに切って試料を用意した。
(2)用意した各試料を栗村化学社製の試験用金型(3cm×4cmの大きさ)を用いて成形した。
(3)成形深さの設定を変更しながら成形評価を繰り返し行い、試料が10つ以上破れないまで進めた。
(4)10つ以上破れなかった成形深さを測定した。
(1)二次電池パウチフィルム幅35mm、長さ600mmの試料を製作する。
(2)外層から内層方向に約40mmの間隔で突刺し強度を測定する。
(3)10回の強度を測定後に平均値を記入する。
Claims (14)
- 少なくとも外層、金属層、プライマー層、シーラント層、又は少なくとも外層、金属層、プライマー層、溶融押出樹脂層、シーラント層をこれらの順に含む二次電池パウチフィルムの製造方法であって、
金属層上にプライマー層組成物を塗布し加熱してプライマー層組成物を乾燥及び少なくとも一部を硬化させる乾燥工程を含み、
前記プライマー層組成物として有機溶剤型エマルジョン組成物を用い、
前記有機溶剤型エマルジョン組成物は、酸変性ポリプロピレン及び硬化剤を含んでなり、硬化開始温度が150℃以下であり、且つ乾燥工程温度が150℃以下であり、
当該製造方法は、シーラント層の貼り合わせの際に熱ラミネート工程を施さないことを特徴とする、二次電池パウチフィルムの製造方法。 - 前記硬化開始温度が135℃~150℃であることを特徴とする、請求項1に記載の二次電池パウチフィルムの製造方法。
- 前記乾燥工程温度が135℃~150℃であることを特徴とする、請求項2に記載の二次電池パウチフィルムの製造方法。
- 前記有機溶剤型エマルジョン組成物は、2液硬化型タイプであることを特徴とする、請求項1に記載の二次電池パウチフィルムの製造方法。
- 前記2液硬化型タイプの有機溶剤型エマルジョン組成物の硬化剤は、エポキシ系硬化剤であることを特徴とする、請求項4に記載の二次電池パウチフィルムの製造方法。
- 前記2液硬化型タイプの有機溶剤型エマルジョン組成物は、主剤パートとして酸変性ポリプロピレンを含み、硬化剤パートとしてエポキシ硬化剤及びエーテル重合体を含むことを特徴とする、請求項5に記載の二次電池パウチフィルムの製造方法。
- 前記有機溶剤型エマルジョン組成物は、硬化開始温度を調節するための触媒を更に含むことを特徴とする、請求項1に記載の二次電池パウチフィルムの製造方法。
- 前記乾燥工程の際に乾燥工程の区域を複数の区域に分け、最初の区域の設定温度及び最後の区域の設定温度よりも最初の区域と最後の区域との間の区域の設定温度を高く設定することを特徴とする、請求項1に記載の二次電池パウチフィルムの製造方法。
- 当該製造方法は、シーラント層の貼り合わせの際に常温におけるエージング工程を経ることを特徴とする、請求項1に記載の二次電池パウチフィルムの製造方法。
- 少なくとも外層、金属層、プライマー層、シーラント層、又は少なくとも外層、金属層、プライマー層、溶融押出樹脂層、シーラント層をこれらの順に含む二次電池パウチフィルムの成形性向上方法であって、
金属層上にプライマー層組成物を塗布し加熱してプライマー層組成物を乾燥及び少なくとも一部を硬化させる乾燥工程を含み、
前記プライマー層組成物として2液硬化型タイプの有機溶剤型エマルジョン組成物を用い、
前記有機溶剤型エマルジョン組成物は、酸変性ポリプロピレン及び硬化剤を含んでなり、硬化開始温度が135℃~150℃であり、且つ乾燥工程温度が135℃~150℃であり、
当該方法は、前記シーラント層の貼り合わせの際に熱ラミネート工程を施さず、
当該方法は、シーラント層の貼り合わせの際に常温におけるエージング工程を経ることを特徴とする、二次電池パウチフィルムの成形性向上方法。 - 金属層と溶融押出樹脂層又はシーラント層との間に挟まれるプライマー層を含み、
成形性が6.5mm以上であり、
初期剥離強度が14.0N/15mm以上であり、
耐フッ酸強度が5.0N/15mm以上であり、
耐電解液強度が初期剥離強度の90%以上であることを特徴とする、二次電池パウチフィルム。 - 前記二次電池パウチフィルムは、初期剥離強度が14.0N/15mm以上であり、
耐電解液強度が14.0N/15mm以上であり、
耐フッ酸強度が5.0N/15mm以上であり、
突刺し強度が21.0N以上であることを特徴とする、請求項11に記載の二次電池パウチフィルム。 - 前記二次電池パウチフィルムは、成形性が6.5~6.8mmであり、
初期剥離強度が14.0~15.0N/15mmであり、
耐電解液強度が14.0~14.5N/15mmであり、
耐フッ酸強度が6.0~6.4N/15mmであり、
突刺し強度が21.0~23.0Nであることを特徴とする、請求項12に記載の二次電池パウチフィルム。 - 前記二次電池パウチフィルムは、基材層、金属層、前記金属層の少なくとも一方側に形成される腐食防止層、前記金属層の内側に形成されるプライマー層、溶融押出樹脂層であるポリプロピレン押出層、シーラント層である無延伸ポリプロピレン(CPP)層から構成され、
前記基材層は、ポリエステルフィルム及びポリイミドフィルムの1種以上からなり、
前記金属層は、アルミニウムからなることを特徴とする、請求項11に記載の二次電池パウチフィルム。
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JP2022043962A (ja) | 2022-03-16 |
KR102522216B1 (ko) | 2023-04-18 |
KR20220031820A (ko) | 2022-03-14 |
JP2022120161A (ja) | 2022-08-17 |
US20220077439A1 (en) | 2022-03-10 |
KR20230052863A (ko) | 2023-04-20 |
US11916241B2 (en) | 2024-02-27 |
CN114132036A (zh) | 2022-03-04 |
US20240079697A1 (en) | 2024-03-07 |
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