JP2018091825A - 欠陥検査装置、欠陥検査方法、セパレータ捲回体の製造方法、及びセパレータ捲回体 - Google Patents
欠陥検査装置、欠陥検査方法、セパレータ捲回体の製造方法、及びセパレータ捲回体 Download PDFInfo
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Abstract
Description
(セパレータ捲回体の製造工程)
図1を用いて、まず、本発明の実施形態1に係るセパレータ捲回体の製造工程について説明する。
し、カットとは、セパレータを横断方向(TD:transverse direction)に沿って切断することを意味する。横断方向(TD)とは、セパレータの長手方向(MD)と厚み方向とに対し略垂直である方向を意味する。
図2は、本発明の実施形態1に係るセパレータ捲回体10の構成を示す模式図であって、(a)はコア8からセパレータ12が巻き出される前の状態を示し、(b)はコア8からセパレータ12が巻き出された状態を示し、(c)はセパレータ12が巻き出され、取り除かれた後のコア8の状態を示し、(d)は(b)の状態を別角度から示す。
図3は、本発明の実施形態1に係る欠陥検査装置1の概略構成を表す図である。欠陥検査装置1は、欠陥検査工程にて、セパレータ捲回体10に欠陥が発生していないか否かを検査するための装置である。本実施形態では、欠陥検査装置1は、捲回されたセパレータ12内に異物が混入していないか否かを検査する装置であるものとして説明する。
(露光時間+移動時間)×撮影回数 (式1)
D2/D1を固定した条件に置いて、焦点2cとセパレータ捲回体10との距離、すなわちD1がX倍になると、検出面3aにおける(時間・面積)あたりの線量が1/(X2)になる。すなわち、D1がX倍の条件下においては、検出面3aにおいて同じ線量を得ようとした場合、露光時間はXの2乗に比例させる必要がある。従って、露光時間についてはD1が小さいほど有利である。一方で、D1を小さくすると、セパレータ捲回体10の撮影範囲は狭くなる。このため、露光時間を短くできるものの、全領域を撮影するための撮影回数が増加し撮影間の移動が増えるため欠陥検査の時間が増大することになる。
次に、図3、図4〜図7を用いて、欠陥検査装置1による欠陥検査方法について説明する。
図25は、本発明の実施形態1の変形例に係る欠陥検査装置1Lの構成を表す図である。
本発明の実施形態2について、主に、図6及び図7に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態3について、主に、図8及び図9に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1、2にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態4について、主に、図10〜図13に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1〜3にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態5について、主に、図16に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1〜4にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態6について、主に、図17に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1〜5にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態7について、主に、図18に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1〜6にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態8について、主に、図19〜図21に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1〜7にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態9について、主に、図22〜図24に基づいて説明すれば、以下のとおりである。なお、説明の便宜上、実施形態1〜8にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の態様1に係る欠陥検査装置は、電池に使用されるセパレータが筒状のコアに捲回されたセパレータ捲回体を保持する保持機構と、上記セパレータ捲回体に対し、当該セパレータ捲回体を透過する電磁波を照射する線源部と、上記線源部が照射し、上記セパレータ捲回体を透過した上記電磁波を検出するセンサ部とを有する。
2 線源部
2a 照射面
2b 中心
3・3C・3H1・3H2・3J1・3J2・3K1・3K2 センサ部
3b・3b1・3b2 着目領域
3bC 欠陥検査画像
4・4a 電磁波
5 異物
6 スリット装置
8 コア
8a 中心穴
10・10A・10F・10G セパレータ捲回体
12・12F・12G セパレータ
20・20C・20D 保持機構
30、30C〜30E、30H、30J〜30L 制御部
31 線源制御部
32・32D 保持機構制御部
33・33C・33H・33J センサ制御部
203 ロボットアーム(保持機構)
Claims (14)
- 電池に使用されるセパレータが筒状のコアに捲回されたセパレータ捲回体に対し、当該セパレータ捲回体を透過する電磁波を照射する線源部と、
上記線源部が照射し、上記セパレータ捲回体を透過した上記電磁波を検出するセンサ部とを有する欠陥検査装置。 - 上記セパレータ捲回体を保持する保持機構を有する請求項1に記載の欠陥検査装置。
- 上記セパレータ捲回体と、上記センサ部の検出面との間には、構造物が配置されていない請求項1又は2に記載の欠陥検査装置。
- 上記線源部の照射面から、上記セパレータ捲回体の両側面のうち上記センサ部側の第2側面までの距離をD1とし、上記線源部の照射面から上記センサ部の検出面までの距離をD2とすると、D2/D1は1より大きく40以下である請求項1〜3の何れか1項に記載の欠陥検査装置。
- 上記線源部は、上記セパレータ捲回体に対し、側面側から上記電磁波を照射する請求項1〜4の何れか1項に記載の欠陥検査装置。
- 上記線源部は、上記セパレータに加え、上記コアにも照射されるように上記電磁波を上記セパレータ捲回体に照射し、
上記センサ部が上記電磁波を検出することで撮影した撮影画像には、上記セパレータの像に加え、上記コアの像も含まれている請求項1〜5の何れか1項に記載の欠陥検査装置。 - 上記電磁波はX線である請求項1〜6の何れか1項に記載の欠陥検査装置。
- 上記線源部の照射面における中心は、上記セパレータ捲回体の側面のうち、上記セパレータと対向しない位置に配置されている請求項7に記載の欠陥検査装置。
- 上記線源部の照射面における中心は、上記セパレータ捲回体の側面のうち、コアの側面と対向して配置されている請求項7又は8に記載の欠陥検査装置。
- 電池に使用されるセパレータが筒状のコアに捲回されたセパレータ捲回体に対し、線源部から、当該セパレータ捲回体を透過する電磁波を照射する照射ステップと、
上記セパレータ捲回体を透過した上記電磁波を検出する検出ステップとを有する欠陥検査方法。 - 請求項10に記載の欠陥検査方法によって上記セパレータ捲回体の、コアに捲回されたセパレータ内の欠陥を検査する欠陥検査工程を含むことを特徴とするセパレータ捲回体の製造方法。
- 上記セパレータよりも幅が広い原反から上記セパレータをスリットするスリット工程と、
上記スリット工程にてスリットされた上記セパレータを、上記コアに捲回することで上記セパレータ捲回体を製造するセパレータ捲回工程と、
上記セパレータ捲回工程にて製造された上記セパレータ捲回体を包装する包装工程とを有し、
上記欠陥検査工程は、上記スリット工程の後、上記包装工程の前に設けられていることを特徴とする請求項11に記載のセパレータ捲回体の製造方法。 - 上記欠陥検査工程では、100μm以上の異物の有無を検査することを特徴とする請求項11又は12に記載のセパレータ捲回体の製造方法。
- 電池に使用されるセパレータが筒状のコアに捲回されたセパレータ捲回体であって、当該コアに捲回されたセパレータ内に、100μm以上の異物が含まれていないことを特徴とするセパレータ捲回体。
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