JP2018517265A - 水分侵入の防止に対する信頼性が向上した電池セル - Google Patents
水分侵入の防止に対する信頼性が向上した電池セル Download PDFInfo
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- JP2018517265A JP2018517265A JP2017564580A JP2017564580A JP2018517265A JP 2018517265 A JP2018517265 A JP 2018517265A JP 2017564580 A JP2017564580 A JP 2017564580A JP 2017564580 A JP2017564580 A JP 2017564580A JP 2018517265 A JP2018517265 A JP 2018517265A
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- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000001008 quinone-imine dye Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 229920005608 sulfonated EPDM Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical group 0.000 description 1
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 1
- MDCWDBMBZLORER-UHFFFAOYSA-N triphenyl borate Chemical compound C=1C=CC=CC=1OB(OC=1C=CC=CC=1)OC1=CC=CC=C1 MDCWDBMBZLORER-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000015041 whisky Nutrition 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
Description
前記電池ケースは、
熱融着されて電池セルの第1シーリング部(first sealing portion)を形成する熱融着予定部と、
電極アセンブリが収納される第1空間と、
前記熱融着予定部と共に電池ケースの外周辺をなし、熱融着予定部の外側に形成されている第2空間とを含み、
前記第2空間のうちの少なくとも一部には、外部から第1空間に水分が侵入することを遮断するための金属片が装着されていることを特徴とする。
金属片は、第2空間で電池ケースのアルミニウム層と溶接される。
前記ケース本体は、第1空間の各端部から外向きに延びている融着面を含み、前記融着面とカバーとが対面して熱融着予定部および第2空間を形成することができる。
(a)第1空間に電極アセンブリを電解液と共に収納し、カバーとケース本体とを対面させて熱融着予定部と第2空間を形成する過程と、
(b)列融着予定部を熱融着して第1シーリング部を形成する過程と、
(c)第2空間に金属片を挿入させる過程と、
(d)溶接機で第2空間内の電池ケースと金属片とを溶接させて第2シーリング部を形成する過程と、
(e)第2シーリング部の長さ方向に沿って、第2シーリング部の幅対比30%〜90%だけ第2シーリング部を切削させる過程とを含むことができる。
前記方法は、熱融着予定部の熱融着後、金属片を第2空間に装着および溶接することを特徴とし、熱融着によって電池ケースの全般的な形態が形成された状態で溶接が行われるため、より安定した溶接工程が可能なだけでなく、高い寸法安定性、例えば、電池セルの幅と長さが所望の形態に製造できる。
(a)第1空間に電極アセンブリを電解液と共に収納し、カバーとケース本体とを対面させて熱融着予定部と第2空間を形成する過程と、
(b)金属片を熱融着予定部それぞれに隣接した第2空間に装着する過程と、
(c)溶接機で第2空間内の電池ケースと金属片とを溶接させながら、溶接時、発生する熱で熱融着予定部を熱融着して第1シーリング部と第2シーリング部を共に形成する過程と、
(d)第2シーリング部の長さ方向に沿って、第2シーリング部の幅対比30%〜90%だけ第2シーリング部を切削させる過程とを含むことを特徴とする。
図3を参照すれば、電池セル100は、樹脂層と金属層とを含むラミネートシートの電池ケース108に、電解液と共に電極アセンブリ106が収納された状態で、電池ケース108の外周辺112、114a、114b、117が密封された構造の板状型(plate−shaped)構造からなる。
図10を参照すれば、電池セル400は、樹脂層と金属層とを含むラミネートシートの電池ケース408に、電解液と共に電極アセンブリ406が収納された状態で、電池ケース408の外周辺412、414a、414b、417が密封された構造の板状型(plate−shaped)構造からなる。
図3を参照すれば、電池セル100は、樹脂層と金属層とを含むラミネートシートの電池ケース108に、電解液と共に電極アセンブリ106が収納された状態で、電池ケース108の外周辺112、114a、114b、107が密封された構造の板状型(plate−shaped)構造からなる。
図10を参照すれば、電池セル400は、樹脂層と金属層とを含むラミネートシートの電池ケース408に、電解液と共に電極アセンブリ406が収納された状態で、電池ケース408の外周辺412、414a、414b、407が密封された構造の板状型(plate−shaped)構造からなる。
Claims (23)
- 樹脂層と金属層とを含むラミネートシートの電池ケースに、電解液と共に電極アセンブリが収納された状態で、電池ケースの外周辺が密封された構造の板状型(plate−shaped)電池セルであって、
前記電池ケースは、
熱融着されて電池セルの第1シーリング部(first sealing portion)を形成する熱融着予定部と、
電極アセンブリが収納される第1空間と、
前記熱融着予定部と共に電池ケースの外周辺をなし、熱融着予定部の外側に形成されている第2空間とを含み、
前記第2空間のうちの少なくとも一部には、外部から第1空間に水分が侵入することを遮断するための金属片が装着されていることを特徴とする電池セル。 - 前記金属片は、第2空間で電池ケースの金属層と溶接によって結合されて第2シーリング部を形成し、前記第2シーリング部は、水分が第1シーリング部に侵入するのを防止することを特徴とする請求項1に記載の電池セル。
- 前記電池ケースは、内部から外部方向に、ポリプロピレン(Polypropylene)、アルミニウム、およびナイロンとポリエチレンテレフタレート(polyethylene terephthalate)のうちの少なくとも1つが順次に層をなしているパウチ型電池ケースであり、
金属片は、第2空間で電池ケースのアルミニウム層と溶接されることを特徴とする請求項2に記載の電池セル。 - 前記電池ケースは、溶接によって第2空間のポリプロピレン層が溶融しながらアルミニウム層が第2空間に露出すると、前記アルミニウム層と金属片とが密着した状態で相互接合されることを特徴とする請求項3に記載の電池セル。
- 前記金属片の厚さは、0.01mm〜5mmであることを特徴とする請求項2に記載の電池セル。
- 前記金属片の厚さは、0.1mm〜3mmであることを特徴とする請求項5に記載の電池セル。
- 前記金属片は、熱融着予定部の長さ対比50%〜100%の長さからなるプレート(plate)であることを特徴とする請求項2に記載の電池セル。
- 前記金属片は、アルミニウム、銅、鉛、およびスズから選択される1つ以上の素材からなることを特徴とする請求項2に記載の電池セル。
- 前記金属片の外面には、アルミニウム層に対して広い溶接面積を確保しながらアルミニウム層との接合力を高められるように、垂直断面上に凹凸構造が形成されていることを特徴とする請求項3に記載の電池セル。
- 前記金属片には1つ以上の貫通口が穿孔されており、溶接時、溶融したアルミニウム層の少なくとも一部が貫通口上で接合されることを特徴とする請求項3に記載の電池セル。
- 前記金属片の少なくとも一部は、熱融着予定部方向に厚さが減少するテーパ(taper)構造からなることを特徴とする請求項3に記載の電池セル。
- 前記金属片は、熱融着予定部方向の端部および前記端部に隣接した上面および下面が外向き突出した構造からなることを特徴とする請求項3に記載の電池セル。
- 前記溶接は、超音波融着機またはウルトラシーム溶接機(ultra seam welder)で行われることを特徴とする請求項2に記載の電池セル。
- 前記電池ケースは、第1空間が形成されているケース本体と、前記ケース本体の一側端部から延びていたり、ケース本体に対して独立した部材からなるカバーとから構成されており、
前記ケース本体は、第1空間の各端部から外向きに延びている融着面を含み、前記融着面とカバーとが対面して熱融着予定部および第2空間を形成することを特徴とする請求項1に記載の電池セル。 - 前記熱融着予定部はそれぞれ、融着面の幅対比20%〜50%の幅で融着されて第1シーリング部を形成し、前記第2空間は、融着面の幅対比50%〜80%の幅で金属片と溶接されて第2シーリング部を形成することを特徴とする請求項14に記載の電池セル。
- 前記第2シーリング部は、金属片と溶接された状態で、その幅対比50%〜90%だけ長さ方向に切削されることを特徴とする請求項15に記載の電池セル。
- 金属片は、電極端子が位置する第2空間を除いた残りの第2空間にのみ装着されることを特徴とする請求項1に記載の電池セル。
- 金属片は、電極端子と接触しないように、電極端子が位置する第2空間の一部および残りの第2空間に装着されることを特徴とする請求項1に記載の電池セル。
- 請求項1〜18のいずれか1項に記載の電池セルを製造する方法であって、
(a)第1空間に電極アセンブリを電解液と共に収納し、カバーとケース本体とを対面させて熱融着予定部と第2空間を形成する過程と、
(b)列融着予定部を熱融着して第1シーリング部を形成する過程と、
(c)第2空間に金属片を挿入させる過程と、
(d)溶接機で第2空間内の電池ケースと金属片とを溶接させて第2シーリング部を形成する過程と、
(d)第2シーリング部の長さ方向に沿って、第2シーリング部の幅対比30%〜90%だけ第2シーリング部を切削させる過程とを含むことを特徴とする方法。 - 請求項1〜18のいずれか1項に記載の電池セルを製造する方法であって、
(a)第1空間に電極アセンブリを電解液と共に収納し、カバーとケース本体とを対面させて熱融着予定部と第2空間を形成する過程と、
(b)金属片を熱融着予定部それぞれに隣接した第2空間に装着する過程と、
(c)溶接機で第2空間内の電池ケースと金属片とを溶接させながら、溶接時、発生する熱で熱融着予定部を熱融着して第1シーリング部と第2シーリング部を共に形成する過程と、
(d)第2シーリング部の長さ方向に沿って、第2シーリング部の幅対比30%〜90%だけ第2シーリング部を切削させる過程とを含むことを特徴とする方法。 - 請求項1〜18のいずれか1項に記載の電池セルを1つ以上含む電池モジュール。
- 請求項21に記載の電池モジュールを1つ以上含む電池パック。
- 請求項22に記載の電池パックを含むデバイス。
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PCT/KR2016/007869 WO2017026688A1 (ko) | 2015-08-12 | 2016-07-20 | 수분 침투의 방지에 대한 신뢰성이 향상된 전지셀 |
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