JP4793367B2 - 電池パックの製造方法 - Google Patents
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- 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
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Description
電池の保護回路基板と、
電池及び保護回路基板を収容した成形型の成形空間に充填して硬化させることで電池の端子を外部に導出した状態にして電池及び保護回路基板を一体的に被覆する外装材を備えた電池パックを製造するに際し、
電池及び保護回路基板に対して樹脂製のフレーム体を設け、電池の包装体とフレーム体を紫外線硬化樹脂で接着し、この後、外装材を複数に分けて各部分を順次形成し、外装材の表面に各部分の継ぎ目であるウエルドラインを形成することを特徴とする電池パックの製造方法である。
[正極]
正極11は、正極活物質を含有する正極活物質層を正極集電体の両面状に形成して成るものである。正極集電体は、例えばアルミニウム(Al)箔などの金属箔により構成され、一方、正極活物質層は、例えば、正極活物質と、導電剤と、結着剤とを含有して構成される。ここで、正極活物質、導電剤、結着剤及び溶剤は、均一に分散していればよく、その混合比は不問である。
LiXMO2…(1)
(式中のMは少なくとも一種の遷移金属を示し、Xは電池の充放電状態によって異なるが、通常は0.05〜1.10である)で表されるリチウムと遷移金属との複合酸化物を用いることができる。なお、リチウム複合酸化物を構成する遷移金属(M)としては、コバルト(Co)、ニッケル(Ni)及びマンガン(Mn)等を用いることができる。
負極12は、負極活物質を含有する負極活物質層を負極集電体の両面上に形成して成るものである。負極集電体は、例えば銅(Cu)箔、ニッケル箔又はステンレス箔などの金属箔により構成される。
電解液としては、リチウムイオン電池に一般的に使用される電解質塩と非水溶媒が使用可能である。
セパレータ13a,13bは、例えば、ポリプロピレン(PP)若しくはポリエチレン(PE)などのポリオレフィン系の材料から成る多孔質膜、又は、セラミック製の不織布などの無機材料から成る多孔質膜により構成され、これらの二種以上の多孔質膜を積層した構造としてもよい。中でも、ポリエチレンやポリプロピレンの多孔質フィルムが最も有効である。
上述のようにして作製したゲル状電解質溶液を正極11及び負極12に均一に塗布し、正極活物質層及び負極活物質層に含浸させた後、常温で保存するか、若しくは乾燥工程を経てゲル状電解質層14を形成する。
まず、アルミニウム蒸着PETフィルムの内面側に接着剤を塗布したラミネートフィルム17を有する電池20を用意し、この電池20をその電圧及び電流を制御可能な保護回路基板2に接続した後、電池20及び保護回路基板2を被覆する外装材3を複数に分けて各部分を順次形成し、外装材3の硬化後に各例の電池パック1とした。この際、実施例1〜3では、フレーム体としてトップカバーやボトムカバーを用い、実施例4〜6、8,9では矩形状のフレーム体(4辺フレーム)を用い、実施例7ではフレーム体を無しにした。
まず、23℃の温度下において、上限4.2Vとして15時間行う1Cの定電流定電圧充電及び終止電圧2.5Vまでの1Cの定電流放電を繰り返して行い、定格エネルギ密度は、1サイクル目の放電容量から求め、求めた定格エネルギ密度を表1に併記した。
定格エネルギ密度[Wh/l]=(平均放電電圧[V]×定格容量[Ah])/電池体積[l]なお、1Cは、電池の理論容量を一時間で放出可能な電流値を示す。
Claims (5)
- 正極と負極とをセパレータを介して巻回又は積層して成る電池素子を包装体で包装した電池と、
前記電池の保護回路基板と、
前記電池及び保護回路基板を収容した成形型の成形空間に充填して硬化させることで前記電池の端子を外部に導出した状態にして電池及び保護回路基板を一体的に被覆する外装材を備えた電池パックを製造するに際し、
前記電池及び保護回路基板に対して樹脂製のフレーム体を設け、前記電池の包装体と前記フレーム体を紫外線硬化樹脂で接着し、この後、前記外装材を複数に分けて各部分を順次形成し、前記外装材の表面に各部分の継ぎ目であるウエルドラインを形成することを特徴とする電池パックの製造方法。 - 前記外装材が、形状維持ポリマーとフィラー材を含む複合材料であることを特徴とする請求項1に記載の電池パックの製造方法。
- 前記形状維持ポリマーが、ウレタン樹脂、アクリル樹脂及びエポキシ樹脂のうちのいずれかの硬化性樹脂であることを特徴とする請求項2に記載の電池パックの製造方法。
- 前記包装体が、アルミラミネートフィルムであることを特徴とする請求項1に記載の電池パックの製造方法。
- 前記包装体が、一層又は二層のフィルムであり且つポリオレフィンフィルムを含むことを特徴とする請求項1に記載の電池パックの製造方法。
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US9450217B2 (en) | 2013-07-19 | 2016-09-20 | Samsung Sdi Co., Ltd. | Pouch battery and manufacturing method thereof |
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JP5509684B2 (ja) * | 2009-06-03 | 2014-06-04 | ソニー株式会社 | 電池パック |
JP6528063B2 (ja) * | 2015-02-26 | 2019-06-12 | 協立化学産業株式会社 | 電池モジュールの製造方法 |
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JP2002245998A (ja) * | 2001-02-13 | 2002-08-30 | Toshiba Corp | 電池パック及び電池 |
JP2003288864A (ja) * | 2002-03-28 | 2003-10-10 | Sanyo Electric Co Ltd | 電 池 |
JP2004303625A (ja) * | 2003-03-31 | 2004-10-28 | Hitachi Maxell Ltd | パック電池とその製造方法 |
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