JP2016213190A - 二次電池および電子機器 - Google Patents
二次電池および電子機器 Download PDFInfo
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- JP2016213190A JP2016213190A JP2016092873A JP2016092873A JP2016213190A JP 2016213190 A JP2016213190 A JP 2016213190A JP 2016092873 A JP2016092873 A JP 2016092873A JP 2016092873 A JP2016092873 A JP 2016092873A JP 2016213190 A JP2016213190 A JP 2016213190A
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- Prior art keywords
- secondary battery
- battery
- battery cell
- positive electrode
- negative electrode
- Prior art date
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Abstract
【解決手段】内部構造物と、内部構造物を包む外装体と、を有し、内部構造物は、正極および負極を有し、外装体は、第1の外装フィルムと、第2の外装フィルムと、を有し、第1の外装フィルムおよび第2の外装フィルムの間に、還元された酸化グラフェンを有する領域を有する二次電池。また、上記酸化グラフェンは、酸素濃度が2atomic%以上20atomic%以下である領域を有すると好ましい。
【選択図】図1
Description
本実施の形態では、本発明の一態様に係る二次電池110と、その作製方法について説明する。
まず、正極について説明する。正極は、正極活物質層104と、正極集電体105と、を有する。
次に負極について説明する。負極は、負極活物質層102と、負極集電体101と、を有する。負極を形成する工程を以下に説明する。
セパレータ103の材料としては、紙、不織布、ガラス繊維、あるいは、ナイロン(ポリアミド)、ビニロン(ポリビニルアルコール系繊維)、ポリエステル、アクリル、ポリオレフィン、ポリウレタンといった合成繊維等を用いればよい。ただし、後述の電解液に溶解しない材料を選ぶ必要がある。
本発明の一態様に係る二次電池に用いることができる電解液107は、電解質(溶質)を含む非水溶液(溶媒)とすることが好ましい。
次に、外装体116について説明する。外装体116には、例えばポリエチレン、ポリプロピレン、ポリカーボネート、アイオノマー、ポリアミド等の有機材料を有するフィルム(または膜)上に、還元された酸化グラフェンを有する層(または領域)を設け、さらに該還元された酸化グラフェンを有する層上に外装体の外面として、シリコーン樹脂、ポリアミド系樹脂、ポリエステル系樹脂等の絶縁性合成樹脂などの有機材料を有するフィルム(または膜)を設けた三層構造の外装フィルムを用いることができる。このような三層構造とすることで、電解液や気体の透過を遮断するとともに、絶縁性を確保し、併せて耐電解液性を有する。外装体を内側に折り曲げて重ねて、または、2つの外装体それぞれの内面を向い合せて重ねて熱を加えることにより、内面の材料が融け2つの外装体を融着することができ、封止構造を作製することができる。
還元された酸化グラフェンを有する層の作製方法として、まず酸化グラフェンを含むスラリーを形成する。スラリーとは、材料と溶媒とを混合した懸濁液である。
本実施の形態にて示された各部材の材料から、可撓性を有する材料を選択して用いることによって、可撓性を有する二次電池を作製することができる。近年、変形可能なデバイスの研究および開発が盛んに行われている。そのようなデバイスに用いる二次電池として、可撓性を有する二次電池の需要が生じている。
次に、二次電池の組み立て及びエージングについて説明する。上述の構成部材を組み合わせて、外装体116を封止することにより図1および図4に示すように、正極集電体105と、正極活物質層104と、セパレータ103と、負極活物質層102と、負極集電体101と、を積み重ねた積層体を複数有する内部構造物を、電解液107とともに外装体116により封止された状態とする。
本実施の形態では、本発明の一態様に係る蓄電池の構造について、図9乃至図13を参照して説明する。
ラミネート型の蓄電池の一例について、図9(A)を参照して説明する。ラミネート型の蓄電池は、可撓性を有する構成とすれば、可撓性を有する部位を少なくとも一部有する電子機器に実装すれば、電子機器の変形に合わせて蓄電池も曲げることもできる。
ここで、図10に外観図を示すラミネート型蓄電池の作製方法の一例について、図12(B)、(C)を用いて説明する。
上記実施の形態で説明した材料を含む二次電池と組み合わせて用いることができる電池制御ユニット(Battery Management Unit:BMU)、及び該電池制御ユニットを構成する回路に適したトランジスタについて、図18乃至図24を参照して説明する。本実施の形態では、特に直列に接続された電池セルを有する蓄電装置の電池制御ユニットについて説明する。
本実施の形態では、実施の形態1で説明した二次電池を電子機器に実装する例について説明する。
本実施の形態では、実施の形態1で説明した二次電池を搭載することのできる電子機器の他の例を示す。
本実施の形態では、車両に実施の形態1で説明した二次電池を搭載する例を示す。
本実施例で準備した外装体は、外装フィルムA、外装フィルムB、外装フィルムCの3種類である。外装フィルムAは、ポリイミドフィルムである。外装フィルムBは、ポリイミドフィルム上に熱還元させた酸化グラフェンを有する層を設け、さらに該還元された酸化グラフェンを有する層上にシリコーン樹脂を有する三層構造の外装フィルムである。外装フィルムCは、ポリイミドフィルム上に化学還元させた後に熱還元させた酸化グラフェンを有する層を設け、さらに該還元された酸化グラフェンを有する層上にシリコーン樹脂を有する三層構造の外装フィルムである。以上の各種試料をそれぞれ2つずつ作製した。
各試料内部への水分の浸入量の測定は、以下の方法により行った。まず試料を温度60℃、湿度90%を維持した恒温槽内に24時間保持した。その後試料を取り出し、グローブボックス内で外装フィルムを開封してプロピレンカーボネートを600μl添加した。添加したプロピレンカーボネートと試料内部のプロピレンカーボネートとをなじませた後に、これらの混合液を約0.3g採取した。そして採取した混合液中の水分量を、水分量計により測定した。水分量計は、カールフィッシャー水分量計(京都工業株式会社製、MKC610)を用いた。
100b 積層体
100c 積層体
100d 積層体
101 負極集電体
102 負極活物質層
103 セパレータ
104 正極活物質層
105 正極集電体
107 電解液
110 二次電池
111 領域
112 外装フィルム
113 外装フィルム
114 薄片
115 リード電極
116 外装体
117 内部構造物
200 金属薄膜
400 眼鏡型デバイス
400a フレーム
400b 表示部
401 ヘッドセット型デバイス
401a マイク部
401b フレキシブルパイプ
401c イヤフォン部
402 デバイス
402a 筐体
402b 二次電池
403 デバイス
403a 筐体
403b 二次電池
405 腕時計型デバイス
405a 表示部
405b ベルト部
406 ベルト型デバイス
406a ベルト部
406b ワイヤレス給電受電部
407 腕輪型デバイス
407a ケース
407b 二次電池
407c 表示部
407d 接続部
407e ヒンジ部
410 ウェアラブルデバイス
412 二次電池
413 センサ部
414 バンド部
415 表示部
500 蓄電池
501 正極集電体
502 正極活物質層
503 正極
504 負極集電体
505 負極活物質層
506 負極
507 セパレータ
508 電解液
509 外装体
510 正極タブ電極
511 負極タブ電極
1700 曲面
1701 平面
1702 曲線
1703 曲率半径
1704 曲率中心
1800 曲率中心
1801 外装フィルム
1802 曲率半径
1803 外装フィルム
1804 曲率半径
2100 蓄電池
2101 正極集電体
2102 正極活物質層
2103 セパレータ
2103a 領域
2103b 領域
2105 負極集電体
2106 負極活物質層
2107 外装体
2111 正極
2111a 正極
2115 負極
2115a 負極
2120 封止層
2121 正極リード
2125 負極リード
2130 電極組立体
2131 電極組立体
2200 蓄電池
7100 携帯表示装置
7101 筐体
7102 表示部
7103 操作ボタン
7104 蓄電池
7300 腕章型デバイス
7301 腕
7400 携帯電話機
7401 筐体
7402 表示部
7403 操作ボタン
7404 外部接続ポート
7405 スピーカ
7406 マイク
7407 蓄電池
8000 表示装置
8001 筐体
8002 表示部
8003 スピーカ部
8004 二次電池
8021 充電装置
8022 ケーブル
8100 照明装置
8101 筐体
8102 光源
8103 二次電池
8104 天井
8105 側壁
8106 床
8107 窓
8200 室内機
8201 筐体
8202 送風口
8203 二次電池
8204 室外機
8300 電気冷凍冷蔵庫
8301 筐体
8302 冷蔵室用扉
8303 冷凍室用扉
8304 二次電池
8400 自動車
8401 ヘッドライト
8500 自動車
9600 タブレット型端末
9625 スイッチ
9626 スイッチ
9627 電源スイッチ
9628 操作スイッチ
9629 留め具
9630 筐体
9630a 筐体
9630b 筐体
9631 表示部
9631a 表示部
9631b 表示部
9632a 領域
9632b 領域
9633 太陽電池
9634 充放電制御回路
9635 二次電池
9636 DCDCコンバータ
9637 コンバータ
9638 操作キー
9639 ボタン
9640 可動部
Claims (5)
- 内部構造物と、前記内部構造物を包む外装体と、を有し、
前記内部構造物は、正極および負極を有し、
前記外装体は、第1の外装フィルムと、第2の外装フィルムと、を有し、
前記第1の外装フィルムおよび前記第2の外装フィルムの間に、還元された酸化グラフェンを有する領域を有することを特徴とする二次電池。 - 請求項1において、
前記還元された酸化グラフェンは、酸素濃度が2atomic%以上20atomic%以下である領域を有することを特徴とする二次電池。 - 請求項1または請求項2において、
前記還元された酸化グラフェンは、層間距離が0.335nm以上0.380nm以下である領域を有することを特徴とする二次電池。 - 請求項1乃至請求項3のいずれか一項において、
前記第1の外装フィルムまたは前記第2の外装フィルムは、有機材料を有することを特徴とする二次電池。 - 請求項1乃至請求項4のいずれか一項に記載の二次電池と、ディスプレイと、操作ボタンと、を有する電子機器。
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US20160329533A1 (en) | 2016-11-10 |
JP7482274B2 (ja) | 2024-05-13 |
JP2020184543A (ja) | 2020-11-12 |
US11916184B2 (en) | 2024-02-27 |
JP2023058695A (ja) | 2023-04-25 |
JP2021170555A (ja) | 2021-10-28 |
JP6727910B2 (ja) | 2020-07-22 |
US20240194931A1 (en) | 2024-06-13 |
JP6922045B2 (ja) | 2021-08-18 |
US10756311B2 (en) | 2020-08-25 |
US20210005853A1 (en) | 2021-01-07 |
WO2016178117A1 (en) | 2016-11-10 |
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