JP6738206B2 - ラミネート材の製造方法 - Google Patents
ラミネート材の製造方法 Download PDFInfo
- Publication number
- JP6738206B2 JP6738206B2 JP2016112421A JP2016112421A JP6738206B2 JP 6738206 B2 JP6738206 B2 JP 6738206B2 JP 2016112421 A JP2016112421 A JP 2016112421A JP 2016112421 A JP2016112421 A JP 2016112421A JP 6738206 B2 JP6738206 B2 JP 6738206B2
- Authority
- JP
- Japan
- Prior art keywords
- resin layer
- heat
- laminate material
- metal
- laminated
- Prior art date
- Legal status (The legal status 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 status listed.)
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
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- 239000000853 adhesive Substances 0.000 description 19
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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Description
本発明のラミネート材の製造方法は、ラミネート素材にレーザー光を照射して照射部分の金属箔と樹脂層を剥離させて剥離部を形成する剥離工程と、剥離部上の樹脂層を切除して金属箔を露出させて金属露出部を形成する切除工程の2つの工程を行う。ラミネート材は剥離工程後で切除工程前の中間加工材に種々の加工を施すことがあり、切除工程前の中間加工材の製造も本発明に含まれる。以下に、ラミネート素材、剥離工程および切除工程について詳述する。
ラミネート素材は金属箔の少なくとも一方の面に樹脂層が貼り合わされて積層されている。図1に示すラミネート素材10は蓄電デバイスの外装体の材料として使用されるものであり、金属箔11の両面に樹脂層17、18が積層された両面ラミネート材である。
図1に示すように、剥離工程において、ラミネート素材10にレーザー光Lを照射して樹脂層17、18を焼灼することなく樹脂層17、18と金属箔11を剥離させて剥離部21、22を形成する。前記剥離部21、22が形成されたラミネート素材を中間加工材20と称する。
図2に示すように、前記中間加工材20の剥離部21、22の輪郭に沿って樹脂層17、18を切断し、剥離部21、22上の樹脂層17a、18aを切除する。上述したように剥離部21、22は光沢が減じられて変色しているので、切断位置は肉眼で視認できる。樹脂層17a、18aの切除によって金属箔11が露出し、金属露出部23、24が形成されてラミネート材25が作製される。
(1)樹脂層が積層されている
(2)樹脂層以外の層が形成されている
(3)何も積層されていない。
図3〜5に、上記の方法で作製したラミネート材で作製した蓄電デバイス用外装体30、35、およびこれらの外装体30、35を用いた蓄電デバイス100、101を示す。
図3は、両面に金属露出部23、24を有するラミネート材25(図2参照)で作製した蓄電デバイス用の外装体30であり、図4は前記外装体30を用いた蓄電デバイス100である。なお、図4はラミネート材25の接着剤層12、14の図示を省略し、金属箔11、耐熱性樹脂層13、熱融着性樹脂層15のみを図示している。
蓄電デバイスの外装体において、外部と電気の授受を行う外側導通部はラミネート材の耐熱性樹脂層13側の面に設けることに限定されず、熱融着性樹脂層15側の面に設けることもできる。また、電池要素が正極用金属箔と負極用金属箔の積層体であることにも限定されない。
本発明の方法で作製するラミネート材の用途は蓄電デバイスの外装体に限定されず、また外装体は図3および図5に示した形態にも限定されない。剥離部を設ける面、位置や数はラミネート材の用途によって異なる。また2つの外装体30、35については、蓄電デバイスの外装体の外側導通部(金属露出部)が耐熱性樹脂層13側の面に設けられていることにも限定されない。図5の外装体35のように2枚のラミネート材の端部をずらして重ねると熱融着性樹脂層15が外装体35の外面に露出するので、熱融着性樹脂層15側の面に外側導通部を設けることができる。また、外装体を構成する2枚のラミネート材において、一方のラミネート材は熱融着性樹脂層15側の面に形成した金属露出部を外側導通部として利用し、他方のラミネート材は耐熱性樹脂層13側の面に形成した金属露出部を外側導通部として利用することもできる。一方、電池要素室内に臨む内側導通部は熱融着性樹脂層15側の面に設けなければならない。従って、タブリードなしの蓄電デバイスの外装体に使用するラミネート材は、耐熱性樹脂層13側の面および熱融着性樹脂層15側の面の両方に金属露出部23、24が設けられているか、熱融着性樹脂15側の面に複数の金属露出部24が設けられていることが条件になる。即ち、中間加工材20において、外装体の内側導通部となる第一の剥離部が熱融着性樹脂層側の面に形成され、外側導通部となる第二の剥離部は熱融着性樹脂層側の面または熱融着性樹脂層側の面に形成されている。
本発明はラミネート素材10を構成する各層の材料を限定するものではないが、好ましい材料として以下の材料を例示することができる。
耐熱性樹脂層13:厚さ25μmの二軸延伸ポリアミドフィルム
接着剤層12:二液硬化型ポリエステル−ウレタン系接着剤、塗布量4g/m3
熱融着性樹脂層15:厚さ40μmの未延伸ポリプロピレンフィルム
接着剤層14:二液硬化型酸変性ポリプロピレン系接着剤、塗布量3g/m3
(剥離工程)
波長523nm、出力15W、スポット径2.2mmのYVO4レーザーを用い、ラミネート素材10の熱融着性樹脂層15側の面の30mm×40mmの領域にレーザー光を走査速度400m/sで走査して照射した。
剥離工程で形成した剥離部22の周縁をレーザー刀で切断し、剥離部21上の樹脂層18aを切除した。レーザー刀は、出力15W、スポット径2.2mmのCO2レーザーであり、走査速度1000mm/で走査した。前記樹脂層18aの切除によって金属箔11が露出し、金属露出部24が形成されていることを確認した。
波長355nm、出力5W、スポット径2.2mmのYAGレーザーを用い、ラミネート素材10の耐熱性樹脂層13側の面の1mm×30mmの領域にレーザー光を走査速度300m/sで走査して照射した。
剥離工程で形成した剥離部21の周縁を実施例1と同じ方法で剥離部21上の樹脂層17a切除した。樹脂層17の切除によって金属箔11が露出し、金属露出部23が形成されていることを確認した。
11…金属箔
12、14…接着剤層
13…耐熱性樹脂層
15…熱融着性樹脂層
17、18…樹脂層
20…中間加工材
21、22…剥離部
23、24…金属露出部
25…ラミネート材
30、35…外装体
40…本体(ラミネート材)
47…第一外側導通部(金属露出部)
48…第一内側導通部(金属露出部)
50…蓋体(ラミネート材)
52…第二外側導通部(金属露出部)
53…第二内側導通部(金属露出部)
60…電池要素室
70、75…電池要素
100、101…蓄電デバイス
110…第一ラミネート材(ラミネート材)
111…第一内側導通部(金属露出部)
112…第一外側導通部(金属露出部)
120…第二ラミネート材(ラミネート材)
121…第二内側導通部(金属露出部)
122…第二外側導通部(金属露出部)
Claims (7)
- 蓄電デバイスの外装体の材料として用いられるラミネート材の製造方法において、
ラミネート素材がアルミニウム箔の少なくとも一方の面に樹脂層が貼り合わされて積層され、前記樹脂層が、接着剤層と、この接着剤層により金属箔に貼り合わされて積層された耐熱性樹脂層または熱融着性樹脂層とからなり、
前記ラミネート素材の樹脂層側の面にレーザー光を照射し、接着剤層とアルミニウム箔の接合界面においてアルミニウム箔の表面に凹みを生じさせるとともに該アルミニウム箔の光沢を減じさせ、樹脂層とアルミニウム箔を剥離させて識別可能な剥離部を形成する剥離工程を行うことを特徴とするラミネート材の製造方法。 - 前記レーザーは、エキシマレーザー、YAGレーザー、YVO4レーザーのうちのいずれかあり、かつ波長が150nm〜550nmであり、出力が3W以上である請求項1に記載のラミネート材の製造方法。
- 前記剥離工程の後、剥離部上の樹脂層を切除してアルミニウム箔を露出させて金属露出部を形成する切除工程を行う請求項1または2に記載のラミネート材の製造方法。
- 前記樹脂層の切除を物理刀またはレーザー刀によって行う請求項3に記載のラミネート材の製造方法。
- 前記ラミネート素材は、アルミニウム箔の一方の面に耐熱性樹脂層が積層され、他方の面に熱融着性樹脂層が積層された両面ラミネート材であり、前記熱融着性樹脂層側の面に第一の剥離部を形成し、前記熱融着性樹脂層側の面または前記耐熱性樹脂層側の面に第二の剥離部を形成する請求項1〜4のうちのいずれか1項に記載のラミネート材の製造方法。
- 請求項5に記載の方法により作製した2枚のラミネート材を熱融着性樹脂層同士を内側に向けて合わせ、縁部を熱封止することにより、内部に第一の剥離部による金属露出部が臨み、電池要素を収納する電池要素室を形成し、外面に第二の剥離部による金属露出部を配置することを特徴とする蓄電デバイス用外装体の製造方法。
- 請求項6に記載の蓄電デバイス用外装体の電池要素室に、正極要素、負極要素、セパレーターおよび電解液からなる電池要素を封入することを特徴とする蓄電デバイスの製造方法。
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