JP2019075367A - 自立電極に電池タブを取り付ける方法 - Google Patents
自立電極に電池タブを取り付ける方法 Download PDFInfo
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- JP2019075367A JP2019075367A JP2018172178A JP2018172178A JP2019075367A JP 2019075367 A JP2019075367 A JP 2019075367A JP 2018172178 A JP2018172178 A JP 2018172178A JP 2018172178 A JP2018172178 A JP 2018172178A JP 2019075367 A JP2019075367 A JP 2019075367A
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Classifications
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Abstract
Description
本出願は、米国特許出願第62/559,254号(2017年9月15日出願、代理人整理番号037110.01018、発明の名称「Method and Structure for Battery Tab Attachment to a Self−Standing Electrode Without Current Collector or Binder」)の優先権を主張するものであり、この参照により当該米国特許出願の内容全体を援用する。
自立電極の突出部(突出部材又は部材とも称する)は、タブ取り付け位置として使用できる(図1A)。タブ箔の2つの金属シートの間、又は折り重ねたタブ箔(図1B)の間に、突出部を割り込ませることによって、タブを取り付けることができる。この挟持構造を通るようにスポット溶接を行い、金属が電極材料を完全に貫通する溶接スポット部を形成する(図1C)。図13A、図13Bは、長尺の電極に直接取り付けられたタブの例を示している。自立電極及び/又は突出部には、1つ以上の金属帯、金属ワイヤ、又は金属格子が埋め込まれてもよいし、埋め込まれていなくてもよい。1つ以上の金属帯、金属ワイヤ、又は金属格子を自立電極に埋め込む方法としては、米国特許出願第16/123,872号(2018年9月6日出願、代理人整理番号037110.01039、発明の名称「Method for Embedding a Battery Tab Attachment in a Self−Standing Electrode without Current Collector or Binder」)が開示しているもの等が挙げられるが、これらに限定されない。当該出願は全てこの参照により本開示に含まれる。
Claims (38)
- カーボンナノチューブの三次元架橋網目構造中に電極活物質の粒子を含有する複合材料を含む本体と、
前記本体から外側に延在し、前記複合材料を含む部材と、
前記部材に固定された電池タブと、
を有する、
自立電極。 - 請求項1記載の自立電極において、
前記電極活物質は、グラファイト、硬質炭素、ケイ素、酸化ケイ素、リチウム金属酸化物、リチウム金属、及びリン酸鉄リチウムから選択される、
自立電極。 - 請求項1記載の自立電極において、
前記部材に固定された前記電池タブは、1つの金属シートを含み、前記金属シートは、前記部材の第1面及び第2面に接触している、
自立電極。 - 請求項3記載の自立電極において、
前記部材の前記第1面に接触している前記金属シートの第1部分は、前記部材の前記第2面に接触している前記金属シートの第2部分に、1つ以上の溶接部、リベット、ステープル、クランプ、又はクリップによって接続されている、
自立電極。 - 請求項1記載の自立電極において、
前記部材に固定された前記電池タブは、2つの金属シートを含み、前記2つの金属シートは、前記部材の第1面及び第2面に接触しており、前記2つの金属シートは、1つ以上の溶接部、リベット、ステープル、クランプ、又はクリップによって互いに接続されている、
自立電極。 - 電極活物質をエアロゾル化又は流動化して、エアロゾル化電極活物質又は流動化電極活物質を調製する工程と、
前記エアロゾル化電極活物質又は前記流動化電極活物質とカーボンナノチューブとを共沈着させ、自立電極を形成する工程と、
前記自立電極の少なくとも第1面及び第2面がそれぞれ電池タブに接触するように、前記自立電極に前記電池タブを固定する工程と、
を含む、
自立電極の製造方法。 - 請求項6記載の自立電極の製造方法において、
前記自立電極に前記電池タブを固定する工程では、1つの金属シートが前記自立電極の少なくとも前記第1面及び前記第2面に接触するように、前記自立電極を覆うように前記金属シートを折り重ねる、
自立電極の製造方法。 - 請求項7記載の自立電極の製造方法において、
前記第2面は前記第1面の反対面である、
自立電極の製造方法。 - 請求項7記載の自立電極の製造方法において、
前記自立電極に前記電池タブを固定する工程では、さらに、前記金属シートのうち、前記自立電極の少なくとも前記第1面及び前記第2面に接触している部分同士を、前記自立電極を貫通する1つ以上の溶接部又はリベットによって互いに接続する、
自立電極の製造方法。 - 請求項6記載の自立電極の製造方法において、
前記エアロゾル化電極活物質と前記カーボンナノチューブとを共沈着させる工程では、
キャリアガス中で前記エアロゾル化電極活物質の粉末を前記カーボンナノチューブに接触させて、前記エアロゾル化電極活物質の粉末と前記カーボンナノチューブとの混合物を調製し、
前記混合物を多孔質表面上に集め、
前記キャリアガスを除去する、
自立電極の製造方法。 - 請求項6記載の自立電極の製造方法において、
前記自立電極の全厚は、約10μm〜約5000μmである、
自立電極の製造方法。 - 請求項11記載の自立電極の製造方法において、
前記自立電極の全厚は、約20μm〜約100μmである、
自立電極の製造方法。 - 請求項6記載の自立電極の製造方法において、
前記自立電極に前記電池タブを固定する工程では、
前記自立電極の前記第1面及び前記第2面をそれぞれ金属シートに接触させ、
前記金属シート同士を、1つ以上の溶接部、リベット、ステープル、クランプ、又はクリップによって互いに接続する、
自立電極の製造方法。 - 請求項6記載の自立電極の製造方法において、
前記自立電極に前記電池タブを固定する工程の前に、前記自立電極を成形して本体と前記本体から外側に延在する部材とを形成する工程を、さらに含み、
前記電池タブは前記部材に固定される、
自立電極の製造方法。 - 請求項6記載の自立電極の製造方法において、
前記エアロゾル化電極活物質又は前記流動化電極活物質と前記カーボンナノチューブとを共沈着させる工程では、
前記エアロゾル化電極活物質又は前記流動化電極活物質とカーボンナノチューブとを多孔質表面上に共沈着させ、バインダーを含まない自立電極を形成する、
自立電極の製造方法。 - バインダーを含まず、カーボンナノチューブの三次元架橋網目構造中に電極活物質粒子を含有する複合材料を含み、第1面及び前記第1面の反対面である第2面を有する自立電極本体と、
前記自立電極本体に固定され、電池タブ本体と、前記電池タブ本体から延在する第1脚部と、前記電池タブ本体から延在する第2脚部とを含む電池タブと、
を有する自立電極であって、
前記自立電極本体は、前記第1脚部と前記第2脚部との間に配置され、前記第1脚部は、前記自立電極本体の前記第1面に接触しており、前記第2脚部は、前記自立電極本体の前記第2面に接触している、
自立電極。 - 請求項16記載の自立電極において、
前記第1脚部は、前記自立電極本体の前記第1面の表面積の50%未満を覆っており、前記第2脚部は、前記自立電極本体の前記第2面の表面積の50%未満を覆っている、
自立電極。 - 請求項17記載の自立電極において、
前記第1脚部は、前記自立電極本体の前記第1面の表面積の33%未満を覆っており、前記第2脚部は、前記自立電極本体の前記第2面の表面積の33%未満を覆っている、
自立電極。 - 請求項18記載の自立電極において、
前記第1脚部は、前記自立電極本体の前記第1面の表面積の25%未満を覆っており、前記第2脚部は、前記自立電極本体の前記第2面の表面積の25%未満を覆っている、
自立電極。 - 請求項16記載の自立電極において、
前記第1脚部及び前記第2脚部はそれぞれ前記電池タブ本体から外側に延在しており、少なくとも第1接続部が前記第1脚部から前記自立電極本体を通って前記第2脚部まで延在しており、前記自立電極本体の第1部分が前記電池タブ本体と前記第1接続部との間に配置されている、
自立電極。 - 請求項20記載の自立電極において、
第2接続部が前記第1脚部から前記自立電極本体を通って前記第2脚部まで延在しており、前記自立電極本体の第2部分が前記第1接続部と前記第2接続部との間に配置されている、
自立電極。 - 請求項21記載の自立電極において、
前記第1接続部及び前記第2接続部は、スポット溶接部である、
自立電極。 - 請求項21記載の自立電極において、
前記第1接続部及び前記第2接続部は、超音波溶接部である、
自立電極。 - 請求項21記載の自立電極において、
前記電池タブは、前記自立電極本体に直接取り付けられている、
自立電極。 - 請求項24記載の自立電極において、
前記電池タブは、前記自立電極本体の端部に対して垂直に取り付けられている、
自立電極。 - 請求項24記載の自立電極において、
前記電池タブは、前記自立電極本体の端部に対して所定の角度で取り付けられている、
自立電極。 - 請求項24記載の自立電極において、
前記電池タブは、1つの金属シートを含み、前記1つの金属シートは前記自立電極を覆うように折り重ねられている、
自立電極。 - 請求項24記載の自立電極において、
前記電池タブは、2つのシートを含み、前記2つのシートはそれぞれ前記自立電極の対向する面に配置されている、
自立電極。 - 請求項21記載の自立電極において、
前記電池タブは、前記自立電極本体から延在する突出部に取り付けられており、前記突出部の幅は、前記電池タブの幅よりも大きいか、或いは前記電池タブの幅と略同等である、
自立電極。 - 請求項21記載の自立電極において、
前記電池タブは、前記自立電極本体から延在する突出部に取り付けられており、前記突出部の幅は、前記電池タブの幅よりも小さい、
自立電極。 - 請求項21記載の自立電極において、
前記電池タブは、前記自立電極本体の端部又は前記自立電極本体から延在する突出部を覆うように折り重ねられており、前記電池タブは、溶接部、リベット、ステープル、クランプ、又はクリップによって固定されている、
自立電極。 - 請求項21記載の自立電極において、
前記第1脚部及び前記第2脚部の各々は、2層以上の金属箔を含む、
自立電極。 - 請求項21記載の自立電極において、
前記電池タブは、2つ以上の金属シートを含み、前記2つ以上の金属シートは前記自立電極を覆うように折り重ねられている、
自立電極。 - 請求項16記載の自立電極において、
前記自立電極本体の前記第1面及び前記第2面のナノチューブ含有割合が高くなっている、
自立電極。 - 請求項16記載の自立電極において、
前記自立電極はさらに、1つ以上の炭素被覆金属箔を有し、前記炭素被覆金属箔は前記第1脚部と前記自立電極本体の前記第1面との間、及び前記第2脚部と前記自立電極本体の前記第2面との間に配置されている、
自立電極。 - 請求項35記載の自立電極において、
前記自立電極本体の前記第1面及び前記第2面のナノチューブ含有割合が高くなっている、
自立電極。 - 請求項16記載の自立電極と前記自立電極を封入する封入体とを有するパウチ型セル電池であって、
前記封入体は、2つのポリマー被覆金属箔と、ヒートシールとを含む、
パウチ型セル電池。 - 請求項37記載のパウチ型セル電池において、
前記第1脚部及び前記第2脚部はそれぞれ、前記電池タブ本体から外側に延在しており、少なくとも第1接続部が前記第1脚部から前記自立電極本体を通って前記第2脚部へと延在しており、前記自立電極本体の第1部分は、前記電池タブ本体と前記第1接続部との間に配置されている、
パウチ型セル電池。
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