JP6890956B2 - 蓄電装置及び電子機器 - Google Patents
蓄電装置及び電子機器 Download PDFInfo
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- JP6890956B2 JP6890956B2 JP2016230839A JP2016230839A JP6890956B2 JP 6890956 B2 JP6890956 B2 JP 6890956B2 JP 2016230839 A JP2016230839 A JP 2016230839A JP 2016230839 A JP2016230839 A JP 2016230839A JP 6890956 B2 JP6890956 B2 JP 6890956B2
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- storage device
- power storage
- positive electrode
- negative electrode
- active material
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Classifications
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- H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
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Description
本実施の形態では、本発明の一態様の蓄電装置について図1乃至図11を用いて説明する。
次に、本発明の一態様の蓄電装置の具体的な構成について説明する。
次に、本発明の一態様の蓄電装置である蓄電装置500の作製方法の一例を、図9乃至図11を用いて説明する。
以下では、本発明の一態様の蓄電装置の構成要素について、詳述する。なお、本実施の形態にて示す各部材の材料から、可撓性を有する材料を選択して用いると、可撓性を有する蓄電装置を作製することができる。
本発明の一態様の蓄電装置では、ポリフェニレンサルファイドまたは溶剤紡糸再生セルロース繊維を含むセパレータを用いる。セパレータは、単層構造であっても積層構造であってもよい。例えば、溶剤紡糸再生セルロース繊維を含むセパレータと、他のセパレータと、の積層構造であってもよい。
電解液は、電解質および溶媒を含む。なお、本明細書等においては、電解質を溶質と記す場合がある。
集電体は、蓄電装置内で顕著な化学変化を引き起こさずに高い導電性を示す限り、特別な制限はない。正極集電体及び負極集電体には、例えば、ステンレス、金、白金、亜鉛、鉄、ニッケル、銅、アルミニウム、チタン、タンタル、マンガン等の金属、これらの合金、又は焼結した炭素などをそれぞれ用いることができる。または、銅もしくはステンレス鋼を炭素、ニッケルもしくはチタン等で被覆して用いてもよい。または、シリコン、チタン、ネオジム、スカンジウム、モリブデンなどの耐熱性を向上させる元素が添加されたアルミニウム合金を用いることができる。または、シリコンと反応してシリサイドを形成する金属元素で集電体を形成してもよい。シリコンと反応してシリサイドを形成する金属元素としては、ジルコニウム、チタン、ハフニウム、バナジウム、ニオブ、タンタル、クロム、モリブデン、タングステン、コバルト、ニッケル等がある。
活物質層は、活物質を含む。活物質とは、キャリアであるイオンの挿入・脱離に関わる物質のみを指し、本明細書等では、活物質が含まれている層を活物質層と呼ぶ。活物質層には活物質に加えて導電助剤および結着剤(バインダー)が含まれていても良い。
外装体509は、電解液508と接する面、すなわち内側の面が電解液508と顕著な反応を生じないことが好ましい。また、蓄電装置500の外部から蓄電装置500内に水分が混入すると、電解液508の成分等と水との反応が生じる場合がある。よって外装体509は、水分の透過性が低いことが好ましい。
本実施の形態では、本発明の一態様の電子機器について、図12乃至図15を用いて説明する。
図12(A)に、腕時計型の携帯情報端末(スマートウォッチとも呼ぶ)700の斜視図を示す。携帯情報端末700は、筐体701、表示パネル702、留め金703、バンド705A、705B、操作ボタン711、712を有する。
図13(A)は、図12(B)に示すバンド705Aとは異なる構成のバンド735Aの斜視図である。バンド735Aと接続される筐体731は、蓄電装置の電解液の漏れを検出する機能を有する漏液検知回路(図示しない)を備える(図12(A)参照)。なお、漏液検知回路を有する携帯情報端末730の斜視図は、携帯情報端末700と同様である。
以下より、携帯情報端末730における電解液の漏れを検出する方法の一例について説明する。図15(A)に、電解液736が漏出した状態における、携帯情報端末730が有する構成のブロック図を示す。図15(A)において、矢印を含む線は矢印の向きによって有線信号または無線信号の伝達方向を示す。よって、該線で結ばれた各要素は電気的に接続される場合がある。また矢印を含まない線は配線を示し、該線で結ばれた各要素は電気的に接続される。
本実施の形態では、本発明の一態様である、可撓性を有する蓄電装置について、図16乃至図23を用いて説明する。本発明の一態様の蓄電装置は、湾曲した形状であってもよい。また、本発明の一態様の蓄電装置は、可撓性を有し、湾曲した状態と湾曲していない状態の双方の状態において使用できてもよい。
図16(A)に二次電池200の斜視図を示し、図16(B)に二次電池200の上面図を示す。
図20(A)に二次電池250の斜視図を示し、図20(B)に二次電池250の上面図を示す。また、図20(C1)に第1の電極組立体230の断面図を示し、図20(C2)に第2の電極組立体231の断面図を示す。
本実施の形態では、本発明の一態様の蓄電装置の使用例について図24乃至図28を用いて説明する。
負極の作製方法は、本実施例の試料全てにおいて共通である。
正極の作製方法は、本実施例の試料全てにおいて共通である。
球状化天然黒鉛の粉末を収束イオンビーム(FIB)法により薄片化して取り出した試料に対して断面TEM(透過型電子顕微鏡)観察を行った。断面TEM観察に用いた装置は、株式会社日立ハイテクノロジーズ社製のH−9000NARであり、観察は加速電圧200kVで行った。得られたTEM像を図31(A)乃至(C)に示す。図31(B)、(C)は、それぞれ図31(A)に示すエッジ面近傍を含む領域900、ベーサル面近傍を含む領域901を拡大したTEM像である。ただし、断面TEM観察においてベーサル面と見られる面においても、微小なエッジは存在しているものと考えられる。
次に、ラマン分光法によりラマンスペクトルを測定した結果について説明する。測定には、(株)堀場製作所の顕微Raman装置LabRAMを用い、球状化天然黒鉛の粉末に対して2点測定した。なおラマン測定に用いたレーザーの波長は532nmである。
負極の作製方法は、本実施例の試料全てにおいて共通である。
正極の作製方法は、本実施例の試料全てにおいて共通である。
51 フィルム
52 フィルム
53 エンボスロール
54 ロール
55 エンボスロール
56 エンボスロール
57 エンボスロール
58 エンボスロール
60 進行方向
101 正極活物質層
102 活物質層
105 電解液
115 封止層
118 接合部
119 導入口
200 二次電池
203 セパレータ
203a 領域
203b 領域
207 外装体
211 正極
211a 正極
215 負極
215a 負極
220 封止層
221 正極リード
225 負極リード
230 電極組立体
231 電極組立体
250 二次電池
281 タブ領域
282 タブ領域
500 蓄電装置
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 正極リード
511 負極リード
512 接合部
513 湾曲部
514 接合部
518 接合部
529 外装体
700 携帯情報端末
701 筐体
702 表示パネル
703 留め金
705A バンド
705B バンド
711 操作ボタン
712 操作ボタン
730 携帯情報端末
731 筐体
732 漏液検知回路
733 電源
734 電流計
735A バンド
736 電解液
739 機能回路
750 蓄電装置
751 正極リード
752 負極リード
753 外装体
760 蓄電装置
761 端子
762 端子
771 配線
772 配線
900 領域
901 領域
911 黒鉛層
912 被覆層
7100 携帯表示装置
7101 筐体
7102 表示部
7103 操作ボタン
7104 蓄電装置
7200 携帯情報端末
7201 筐体
7202 表示部
7203 バンド
7204 バックル
7205 操作ボタン
7206 入出力端子
7207 アイコン
7250 活動量計
7251 筐体
7300 表示装置
7304 表示部
7350 表示装置
7351 レンズ
7351A 画像
7351B 画像
7352 フレーム
7355 先端部
7360 蓄電装置
7361 正極リード
7362 負極リード
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 蓄電装置
8000 表示装置
8001 筐体
8002 表示部
8003 スピーカ部
8004 蓄電装置
8021 充電装置
8022 ケーブル
8024 蓄電装置
8100 照明装置
8101 筐体
8102 光源
8103 蓄電装置
8104 天井
8105 側壁
8106 床
8107 窓
8200 室内機
8201 筐体
8202 送風口
8203 蓄電装置
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 蓄電装置
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
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 蓄電体
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 (8)
- 正極と、負極と、セパレータと、電解液と、外装体と、を有し、
前記外装体は、長軸方向に周期的に、短軸方向に延在するように、凹凸が形成されており、
前記正極は、正極活物質層と、正極集電体と、を含み、
前記負極は、負極活物質層と、負極集電体と、を含み、
前記セパレータは、前記正極および前記負極の間に位置し、
前記セパレータは、ポリフェニレンサルファイドまたは溶剤紡糸再生セルロース繊維を含み、
前記電解液は、溶質および二種以上の溶媒を有し、
前記溶質は、LiBETA(リチウムビスペンタフルオロエタンスルホニルアミド)を含み、
前記溶媒は、プロピレンカーボネートを含む、
蓄電装置。 - 請求項1において、
前記溶媒は、プロピレンカーボネートおよびエチレンカーボネートを含む、
蓄電装置。 - 請求項1または請求項2において、
前記負極活物質層が、黒鉛を含む、
蓄電装置。 - 請求項3において、
前記負極活物質層が、球状化天然黒鉛を含み、
前記球状化天然黒鉛は、第1の領域及び第2の領域を有し、
前記第1の領域は前記第2の領域を覆い、
前記第1の領域は前記第2の領域より結晶性が低い、
蓄電装置。 - 請求項1乃至請求項4のいずれか一において、
前記正極活物質層が、LiCoO2を含む、
蓄電装置。 - 請求項1乃至請求項5のいずれか一において、
前記正極集電体が、アルミニウムまたはステンレスを含む、
蓄電装置。 - 請求項1乃至請求項6のいずれか一に記載の蓄電装置と、バンドと、表示パネルと、筐体と、を有し、
前記蓄電装置は、正極リードおよび負極リードを有し、
前記正極リードは、前記正極と電気的に接続され、
前記負極リードは、前記負極と電気的に接続され、
前記蓄電装置は、前記バンドの内部に埋め込まれ、
前記正極リードの一部および前記負極リードの一部は、前記バンドから突出し、
前記蓄電装置は、可撓性を有し、
前記蓄電装置は、前記表示パネルと電気的に接続され、
前記表示パネルは、前記筐体に含まれ、
前記バンドは、前記筐体と接続され、
前記バンドは、ゴム材料を含む、
電子機器。 - 請求項7において、
前記ゴム材料は、フッ素ゴムまたはシリコーンゴムである、
電子機器。
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