JP2014038744A - Flat type battery - Google Patents

Flat type battery Download PDF

Info

Publication number
JP2014038744A
JP2014038744A JP2012179537A JP2012179537A JP2014038744A JP 2014038744 A JP2014038744 A JP 2014038744A JP 2012179537 A JP2012179537 A JP 2012179537A JP 2012179537 A JP2012179537 A JP 2012179537A JP 2014038744 A JP2014038744 A JP 2014038744A
Authority
JP
Japan
Prior art keywords
gasket
peripheral wall
positive electrode
negative electrode
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2012179537A
Other languages
Japanese (ja)
Other versions
JP6122263B2 (en
Inventor
Yuji Yamamoto
雄治 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP2012179537A priority Critical patent/JP6122263B2/en
Publication of JP2014038744A publication Critical patent/JP2014038744A/en
Application granted granted Critical
Publication of JP6122263B2 publication Critical patent/JP6122263B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

PROBLEM TO BE SOLVED: To provide a flat type battery having a laminate housed in an internal space formed by an outer can and a mouth sealing can, said battery having a structure capable of preventing the laminate from being damaged by a gasket when the outer can and the mouth sealing can are combined.SOLUTION: A flat type battery (1) comprises: a cathode can (10) having a peripheral wall section (12); an anode can (20) having a peripheral wall section (22); an electrode body (40) formed by stacking a cathode (41) and an anode (46) one on top of another in the thickness direction and housed in an inner space (1a); and a gasket (30) sandwiched between the cathode can (10) and the anode can (20). The gasket (30) includes a gasket interior part (31) positioned within the inner space (1a). The gasket interior part (31) has an R section (31a) provided on the inner side of the inner space (1a) and on the bottom (11) side of the cathode can (10).

Description

本発明は、外装缶及び封口缶によって形成される内部空間内に、正極及び負極を積層することによって形成される積層体が収納される扁平形電池に関する。   The present invention relates to a flat battery in which a laminate formed by laminating a positive electrode and a negative electrode is housed in an internal space formed by an outer can and a sealed can.

有底筒状の外装缶と、該外装缶との間に空間が形成されるように該外装缶に対して配置される有底筒状の封口缶と、前記空間内に配置される積層体と、外装缶と封口缶との間に挟み込まれるガスケットとを備えた扁平形電池が知られている。このような扁平形電池では、例えば特許文献１に開示されるように、正極缶及び負極缶によって形成される空間内に、複数の正極及び複数の負極を交互に積層することによって構成される積層体が収納されている。また、前記特許文献１の構成では、正極缶と負極缶との間にガスケットが挟み込まれている。   A bottomed cylindrical outer can, a bottomed cylindrical sealing can disposed with respect to the outer can so that a space is formed between the outer can, and a laminate disposed in the space And a flat battery including a gasket sandwiched between an outer can and a sealed can. In such a flat battery, for example, as disclosed in Patent Document 1, a stack formed by alternately stacking a plurality of positive electrodes and a plurality of negative electrodes in a space formed by a positive electrode can and a negative electrode can. The body is stored. In the configuration of Patent Document 1, a gasket is sandwiched between the positive electrode can and the negative electrode can.

上述の構成では、電池を組み立てる際には、有底円筒状の正極缶内に積層体を配置した後、該正極缶の開口側を覆うように有底円筒状の負極缶を逆皿状に配置し、正極缶の側壁を負極缶の側壁に嵌合させる。この際、負極缶の側壁に設けられたガスケットが該負極缶と正極缶との間に挟み込まれるように、正極缶と負極缶とを組み合わせる。   In the above configuration, when assembling the battery, after placing the laminate in the bottomed cylindrical positive electrode can, the bottomed cylindrical negative electrode can is formed in an inverted dish shape so as to cover the opening side of the positive electrode can. Arrange and fit the side wall of the positive electrode can to the side wall of the negative electrode can. At this time, the positive electrode can and the negative electrode can are combined so that the gasket provided on the side wall of the negative electrode can is sandwiched between the negative electrode can and the positive electrode can.

特開２００９−２８９６２１号公報JP 2009-289621 A

ところで、上述のように、外装缶と封口缶との間に形成される空間内に積層体を配置した状態で、封口缶の側壁に設けられたガスケットを外装缶との間に挟み込む場合、積層体とガスケットとの位置関係によっては該ガスケットが積層体と接触する可能性がある。特に、電池を小型化する場合には、電池内の空間が狭くなるため、積層体とガスケットとの距離が短くなる。そのため、積層体とガスケットとが接触しやすくなる。   By the way, as described above, when the laminated body is disposed in the space formed between the outer can and the sealed can, the gasket provided on the side wall of the sealed can is sandwiched between the outer can and the laminated can Depending on the positional relationship between the body and the gasket, the gasket may come into contact with the laminate. In particular, when the battery is downsized, the space in the battery is narrowed, so the distance between the laminate and the gasket is shortened. Therefore, the laminate and the gasket are likely to come into contact.

ガスケットが積層体と接触した場合、該ガスケットによって、積層体の一部が損傷を受ける可能性がある。積層体が損傷を受けると、電池内部で短絡を生じる可能性がある。   When the gasket comes into contact with the laminate, the gasket may damage a part of the laminate. When the laminate is damaged, there is a possibility that a short circuit occurs inside the battery.

本発明の目的は、外装缶及び封口缶によって形成される内部空間内に積層体が収納される扁平形電池において、外装缶と封口缶とを組み合わせる際にガスケットによって積層体が損傷を受けるのを防止可能な構成を得ることにある。   An object of the present invention is to provide a flat battery in which a laminated body is housed in an internal space formed by an outer can and a sealed can, and the laminated body is damaged by the gasket when the outer can and the sealed can are combined. It is to obtain a preventable configuration.

本発明の一実施形態に係る扁平形電池は、筒状の外装缶周壁部を有する有底筒状の外装缶と、筒状の封口缶周壁部を有し、前記外装缶の開口側を覆うとともに前記外装缶周壁部が前記封口缶周壁部の開口部側に接続される有底筒状の封口缶と、それぞれ平板状に形成された正極及び負極を厚み方向に積層することにより形成され、前記外装缶及び前記封口缶によって形成された内部空間内に収納される積層体と、前記外装缶と前記封口缶との間に挟み込まれるガスケットとを備え、前記ガスケットは、前記内部空間内に位置付けられるガスケット内側部を有し、前記ガスケット内側部には、前記内部空間の内方側で且つ前記外装缶の底部側に、Ｒ部が設けられている（第１の構成）。   A flat battery according to an embodiment of the present invention has a bottomed cylindrical outer can having a cylindrical outer can peripheral wall and a cylindrical sealing can peripheral wall, and covers the opening side of the outer can. And the outer can peripheral wall portion is formed by laminating a bottomed cylindrical sealing can connected to the opening side of the sealing can peripheral wall portion, and a positive electrode and a negative electrode each formed in a flat plate shape in the thickness direction, A laminated body housed in an inner space formed by the outer can and the sealing can, and a gasket sandwiched between the outer can and the sealing can, the gasket being positioned in the inner space A gasket inner portion is provided, and an R portion is provided on the gasket inner portion on the inner side of the internal space and on the bottom side of the outer can (first configuration).

これにより、外装缶内に積層体を配置した状態で、封口缶及びガスケットを外装缶に組み合わせる際に、該ガスケットが積層体に接触しても、該ガスケットによって積層体が損傷を受けるのを防止できる。すなわち、ガスケットのガスケット内側部には、内部空間の内方側で且つ外装缶の底面側にＲ部が設けられているため、ガスケットが積層体に接触する際には、前記Ｒ部が積層体に接触する。そうすると、積層体にガスケットの角部が接触する場合に比べて、該積層体の損傷を抑制することができる。   This prevents the laminated body from being damaged by the gasket even when the gasket comes into contact with the laminated body when the sealed can and the gasket are combined with the outer can in the state where the laminated body is disposed in the outer can. it can. That is, since an R portion is provided on the inner side of the internal space and on the bottom surface side of the outer can in the gasket, when the gasket contacts the laminate, the R portion is the laminate. To touch. If it does so, damage to this laminated body can be suppressed compared with the case where the corner | angular part of a gasket contacts a laminated body.

前記第１の構成において、前記封口缶は、前記封口缶周壁部が前記外装缶周壁部の内方に位置するように、前記外装缶に対して組み合わされ、前記ガスケット内側部は、前記封口缶周壁部の内方に位置し、前記ガスケットは、前記封口缶周壁部の外方に位置するガスケット外側部と、前記ガスケット内側部と前記ガスケット外側部とを繋ぐガスケット接続部とをさらに有し、前記封口缶周壁部を挟み込むように配置されるのが好ましい（第２の構成）。   In the first configuration, the sealing can is combined with the outer can so that the peripheral wall portion of the sealing can is located inward of the outer peripheral wall portion of the outer can, and the gasket inner portion is Located on the inner side of the peripheral wall portion, the gasket further includes a gasket outer portion positioned on the outer side of the sealing can peripheral wall portion, and a gasket connection portion that connects the gasket inner portion and the gasket outer portion, It is preferable that the peripheral wall portion of the sealing can be sandwiched (second configuration).

このような構成では、封口缶周壁部にガスケットが取り付けられた状態で、封口缶を外装缶に組み合わせる際に、ガスケットが積層体に接触する可能性がある。このような構成において、上述の第１の構成を適用することにより、積層体がガスケットにより損傷を受けるのを防止できる。   In such a configuration, when the gasket is attached to the peripheral wall portion of the sealing can, the gasket may come into contact with the laminate when the sealing can is combined with the outer can. In such a configuration, it is possible to prevent the laminated body from being damaged by the gasket by applying the first configuration described above.

前記第２の構成において、前記Ｒ部は、前記ガスケット内側部と前記ガスケット接続部との間に設けられているのが好ましい（第３の構成）。   In the second configuration, it is preferable that the R portion is provided between the gasket inner portion and the gasket connection portion (third configuration).

Ｒ部は、封口缶を外装缶に組み合わせる際に、ガスケットが積層体と接触する可能性が最も高い部分、すなわちガスケット内側部とガスケット接続部との間に設けられているため、ガスケットが積層体と接触しても、該積層体が損傷を受けるのを極力防止できる。   The R portion is provided between the portion where the gasket is most likely to come into contact with the laminated body when the sealed can is combined with the outer can, that is, between the gasket inner portion and the gasket connecting portion. Even if it contacts with, it can prevent that this laminated body is damaged as much as possible.

前記第１から第３の構成のうちいずれか一つの構成において、前記ガスケット内側部は、前記封口缶周壁部に沿うように延びていて、前記Ｒ部は、前記ガスケット内側部の厚みの半分以上の曲率半径を有するのが好ましい（第４の構成）。   In any one of the first to third configurations, the gasket inner portion extends along the peripheral wall portion of the sealing can, and the R portion is more than half the thickness of the gasket inner portion. (4th structure).

これにより、ガスケット内側部の内部空間側が積層体と接触した場合でも、該ガスケット内側部によって積層体に損傷を与えるのを防止できる。   Thereby, even when the internal space side of the gasket inner part contacts the laminate, it is possible to prevent the laminate from being damaged by the gasket inner part.

前記第４の構成において、前記Ｒ部は、前記ガスケット内側部の厚み以上の曲率半径を有するのが好ましい（第５の構成）。   In the fourth configuration, the R portion preferably has a radius of curvature equal to or greater than the thickness of the gasket inner portion (fifth configuration).

これにより、ガスケット内側部は、外装缶の底部側全体にＲ部が形成される。よって、ガスケット内側部が積層体と接触した場合に、該積層体が損傷を受けるのをより確実に防止できる。   Thereby, as for the gasket inner side part, R part is formed in the whole bottom part side of an armored can. Therefore, when the gasket inner side part contacts with a laminated body, it can prevent more reliably that this laminated body is damaged.

本発明の一実施形態に係る扁平形電池によれば、外装缶と封口缶との間に挟み込まれるガスケットのうち、内部空間内に位置するガスケット内側部に、該内部空間の内方側で且つ外装缶の底部側にＲ部を設ける。これにより、電池を組み立てる際に、内部空間内に配置される積層体にガスケットが接触した場合でも、該積層体が損傷を受けるのを防止できる。   According to the flat battery according to one embodiment of the present invention, among the gaskets sandwiched between the outer can and the sealing can, the inner side of the inner space on the gasket inner side located in the inner space and An R portion is provided on the bottom side of the outer can. Thereby, when assembling a battery, even when a gasket contacts the laminated body arrange | positioned in internal space, it can prevent that this laminated body is damaged.

図１は、本発明の一実施形態に係る扁平形電池の概略構成を示す断面図である。FIG. 1 is a cross-sectional view showing a schematic configuration of a flat battery according to an embodiment of the present invention. 図２は、扁平形電池の外周側の構造を拡大して断面で示す部分拡大断面図である。FIG. 2 is a partial enlarged cross-sectional view showing the structure of the outer periphery side of the flat battery in an enlarged manner. 図３は、扁平形電池の製造方法を説明するための断面図である。FIG. 3 is a cross-sectional view for explaining a method of manufacturing a flat battery. 図４は、扁平形電池の製造方法を説明するための断面図である。FIG. 4 is a cross-sectional view for explaining a method of manufacturing a flat battery.

以下、図面を参照し、本発明の実施の形態を詳しく説明する。図中の同一または相当部分については同一の符号を付してその説明は繰り返さない。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

（全体構成）
図１は、本発明の一実施形態である扁平形電池１の概略構成を示す断面図である。この扁平形電池１は、有底円筒状の外装缶としての正極缶１０と、該正極缶１０の開口を覆う封口缶としての負極缶２０と、正極缶１０の外周側と負極缶２０の外周側との間に配置されるガスケット３０と、正極缶１０及び負極缶２０の間に形成される内部空間１ａ内に収納される電極体４０（積層体）とを備える。したがって、扁平形電池１は、正極缶１０と負極缶２０とを合わせることによって、全体が扁平なコイン状となる。扁平形電池１の正極缶１０及び負極缶２０の間に形成される内部空間１ａ内には、電極体４０以外に、非水電解液（図示省略）も封入されている。 (overall structure)
FIG. 1 is a cross-sectional view showing a schematic configuration of a flat battery 1 according to an embodiment of the present invention. The flat battery 1 includes a positive electrode can 10 as a bottomed cylindrical outer can, a negative electrode can 20 as a sealing can that covers an opening of the positive electrode can 10, an outer peripheral side of the positive electrode can 10, and an outer periphery of the negative electrode can 20. And the electrode body 40 (laminated body) accommodated in the internal space 1a formed between the positive electrode can 10 and the negative electrode can 20. Therefore, the flat battery 1 is formed into a flat coin shape by combining the positive electrode can 10 and the negative electrode can 20 together. In addition to the electrode body 40, a non-aqueous electrolyte (not shown) is also enclosed in the internal space 1a formed between the positive electrode can 10 and the negative electrode can 20 of the flat battery 1.

正極缶１０は、ステンレスなどの金属材料からなり、プレス成形によって有底円筒状に形成されている。正極缶１０は、円形状の底部１１と、その外周に該底部１１と連続して形成される円筒状の周壁部１２とを備える。この周壁部１２は、縦断面視（図１に図示した状態）で、底部１１の外周端からほぼ垂直に延びるように設けられている。正極缶１０は、後述するように、負極缶２０との間にガスケット３０を挟んだ状態で、周壁部１２の開口端側が内側に折り曲げられて、負極缶２０に対してかしめられている。   The positive electrode can 10 is made of a metal material such as stainless steel, and is formed into a bottomed cylindrical shape by press molding. The positive electrode can 10 includes a circular bottom portion 11 and a cylindrical peripheral wall portion 12 formed continuously with the bottom portion 11 on the outer periphery thereof. The peripheral wall portion 12 is provided so as to extend substantially vertically from the outer peripheral end of the bottom portion 11 in a longitudinal sectional view (the state illustrated in FIG. 1). As described later, the positive electrode can 10 is crimped to the negative electrode can 20 by bending the opening end side of the peripheral wall portion 12 inward with the gasket 30 interposed between the positive electrode can 10 and the negative electrode can 20.

負極缶２０も、正極缶１０と同様、ステンレスなどの金属材料からなり、プレス成形によって有底円筒状に形成されている。負極缶２０は、正極缶１０の周壁部１２よりも外形が小さい円筒状の周壁部２２と、その一方の開口を塞ぐ円形状の平面部２１と、を有する。この周壁部２２も、正極缶１０と同様、縦断面視で、平面部２１に対してほぼ垂直に延びるように設けられている。周壁部２２には、平面部２１側の基端部２２ａに比べて径が段状に大きくなる拡径部２２ｂが形成されている。すなわち、周壁部２２には、基端部２２ａと拡径部２２ｂとの間に段部２２ｃが形成されている。図１に示すように、この段部２２ｃに対して、正極缶１０の周壁部１２の開口端側が折り曲げられてかしめられている。すなわち、正極缶１０は、その周壁部１２の開口端側が負極缶２０の段部２２ｃに嵌合されている。   Similarly to the positive electrode can 10, the negative electrode can 20 is made of a metal material such as stainless steel and is formed in a bottomed cylindrical shape by press molding. The negative electrode can 20 includes a cylindrical peripheral wall portion 22 whose outer shape is smaller than that of the peripheral wall portion 12 of the positive electrode can 10 and a circular flat portion 21 that closes one of the openings. Similar to the positive electrode can 10, the peripheral wall portion 22 is also provided so as to extend substantially perpendicular to the flat portion 21 in a longitudinal sectional view. The peripheral wall portion 22 is formed with an enlarged diameter portion 22b whose diameter is increased stepwise compared to the base end portion 22a on the flat surface portion 21 side. That is, the peripheral wall portion 22 is formed with a step portion 22c between the base end portion 22a and the enlarged diameter portion 22b. As shown in FIG. 1, the open end side of the peripheral wall portion 12 of the positive electrode can 10 is bent and caulked with respect to the step portion 22c. That is, the positive electrode can 10 has the opening end side of the peripheral wall portion 12 fitted to the step portion 22 c of the negative electrode can 20.

ガスケット３０は、ポリプロピレン（ＰＰ）からなる。ガスケット３０は、正極缶１０の周壁部１２と負極缶２０の周壁部２２との間に挟みこまれるように、該負極缶２０の周壁部２２に配置されている。なお、ガスケット３０の材料としては、ＰＰに限らず、ポリフェニレンサルファイド（ＰＰＳ）にオレフィン系エラストマーを含有した樹脂組成物や、ポリテトラフルオロエチレン（ＰＦＡ）、ポリアミド系樹脂などを用いてもよい。   The gasket 30 is made of polypropylene (PP). The gasket 30 is disposed on the peripheral wall portion 22 of the negative electrode can 20 so as to be sandwiched between the peripheral wall portion 12 of the positive electrode can 10 and the peripheral wall portion 22 of the negative electrode can 20. The material of the gasket 30 is not limited to PP, and a resin composition containing an olefin elastomer in polyphenylene sulfide (PPS), polytetrafluoroethylene (PFA), a polyamide resin, or the like may be used.

ガスケット３０の詳しい構成については後述する。   The detailed configuration of the gasket 30 will be described later.

電極体４０は、図２にも示すように、袋状のセパレータ４４内に収容された略円板状の正極４１と、略円板状の負極４６と、を厚み方向に交互に複数、積層してなる。これにより、電極体４０は、全体として略円柱状の形状を有する。また、電極体４０は、両端面が負極になるように、複数の正極４１及び負極４６が積層されている。   As shown in FIG. 2, the electrode body 40 is formed by laminating a plurality of substantially disc-like positive electrodes 41 and substantially disc-like negative electrodes 46 accommodated in a bag-like separator 44 in the thickness direction. Do it. Thereby, the electrode body 40 has a substantially columnar shape as a whole. In addition, the electrode body 40 has a plurality of positive electrodes 41 and negative electrodes 46 stacked so that both end faces are negative electrodes.

正極４１は、コバルト酸リチウム等の正極活物質を含有する正極活物質層４２を、アルミニウム等の金属箔製の正極集電体４３の両面にそれぞれ形成したものである。   The positive electrode 41 is formed by forming positive electrode active material layers 42 containing a positive electrode active material such as lithium cobaltate on both surfaces of a positive electrode current collector 43 made of a metal foil such as aluminum.

負極４６は、黒鉛等の負極活物質を含有する負極活物質層４７を、銅等の金属箔製の負極集電体４８の両面にそれぞれ形成したものである。略円柱状の電極体４０の積層方向両端に位置する負極は、それぞれ、負極集電体４８，４８が電極体４０の積層方向端部に位置するように、負極集電体４８の一面側のみに負極活物質層４７を有する。すなわち、略円柱状の電極体４０は、その両端で負極集電体４８，４８が露出している。   The negative electrode 46 is obtained by forming a negative electrode active material layer 47 containing a negative electrode active material such as graphite on both surfaces of a negative electrode current collector 48 made of a metal foil such as copper. The negative electrodes positioned at both ends in the stacking direction of the substantially cylindrical electrode body 40 are only on one surface side of the negative electrode current collector 48 so that the negative electrode current collectors 48 are positioned at the end portions in the stacking direction of the electrode body 40, respectively. Has a negative electrode active material layer 47. In other words, the negative electrode current collectors 48 are exposed at both ends of the substantially cylindrical electrode body 40.

電極体４０の一方の負極集電体４８は、該電極体４０が正極缶１０と負極缶２０との間に配置された状態で、負極缶２０の平面部２１に当接する。電極体４０の他方の負極集電体４８は、絶縁シート４９を介して正極缶１０の底部１１上に位置付けられる。   One negative electrode current collector 48 of the electrode body 40 contacts the flat portion 21 of the negative electrode can 20 in a state where the electrode body 40 is disposed between the positive electrode can 10 and the negative electrode can 20. The other negative electrode current collector 48 of the electrode body 40 is positioned on the bottom 11 of the positive electrode can 10 with the insulating sheet 49 interposed therebetween.

セパレータ４４は、平面視で略円形状に形成された袋状の部材であり、略円板状の正極４１を収納可能な大きさに形成されている。セパレータ４４は、絶縁性に優れたポリエチレン製の微多孔性薄膜によって構成されている。このように、セパレータ４４を微多孔性薄膜によって構成することで、リチウムイオンが該セパレータ４４を透過することができる。セパレータ４４は、一枚の長方形状の微多孔性薄膜のシート材によって正極４１を包み込んで、該シート材の重なっている部分を熱溶着等によって接着することにより形成される。   The separator 44 is a bag-shaped member formed in a substantially circular shape in plan view, and is formed in a size that can accommodate the substantially disk-shaped positive electrode 41. The separator 44 is constituted by a microporous thin film made of polyethylene having excellent insulating properties. Thus, by forming the separator 44 with a microporous thin film, lithium ions can pass through the separator 44. The separator 44 is formed by wrapping the positive electrode 41 with a single sheet of a rectangular microporous thin film and bonding the overlapping portions of the sheet material by thermal welding or the like.

図１に示すように、正極４１の正極集電体４３には、平面視で該正極集電体４３の外方に向かって延びる導電性の正極リード５１が一体形成されている。この正極リード５１の正極集電体４３側も、セパレータ４４によって覆われている。   As shown in FIG. 1, the positive electrode current collector 43 of the positive electrode 41 is integrally formed with a conductive positive electrode lead 51 extending outward from the positive electrode current collector 43 in plan view. The positive electrode current collector 43 side of the positive electrode lead 51 is also covered with the separator 44.

負極４６の負極集電体４８には、平面視で該負極集電体４８の外方に向かって延びる導電性の負極リード５２が一体形成されている。   The negative electrode current collector 48 of the negative electrode 46 is integrally formed with a conductive negative electrode lead 52 extending outward from the negative electrode current collector 48 in plan view.

図１に示すように、正極４１及び負極４６は、各正極４１の正極リード５１が一側に位置し、且つ、各負極４６の負極リード５２が該正極リード５１とは反対側に位置するように、積層される。   As shown in FIG. 1, the positive electrode 41 and the negative electrode 46 are such that the positive electrode lead 51 of each positive electrode 41 is positioned on one side and the negative electrode lead 52 of each negative electrode 46 is positioned on the opposite side of the positive electrode lead 51. Is laminated.

上述のように複数の正極４１及び負極４６を厚み方向に積層した状態で、複数の正極リード５１は、先端側を厚み方向に重ね合わされて、超音波溶接等によって正極缶１０の底部１１に接続される。これにより、複数の正極リード５１を介して複数の正極４１と正極缶１０の底部１１とが電気的に接続される。   In the state where the plurality of positive electrodes 41 and the negative electrodes 46 are laminated in the thickness direction as described above, the plurality of positive electrode leads 51 are overlapped at the tip side in the thickness direction and connected to the bottom 11 of the positive electrode can 10 by ultrasonic welding or the like. Is done. Thereby, the plurality of positive electrodes 41 and the bottom 11 of the positive electrode can 10 are electrically connected via the plurality of positive electrode leads 51.

一方、複数の負極リード５２も、先端側を厚み方向に重ね合わされて超音波溶接等によって互いに接続される。これにより、複数の負極リード５２を介して複数の負極４６が互いに電気的に接続される。   On the other hand, the plurality of negative electrode leads 52 are also connected to each other by ultrasonic welding or the like with the distal end side overlapped in the thickness direction. Thereby, the plurality of negative electrodes 46 are electrically connected to each other via the plurality of negative electrode leads 52.

（ガスケット）
次に、ガスケット３０の構成について、図１から図３を用いて詳しく説明する。 (gasket)
Next, the configuration of the gasket 30 will be described in detail with reference to FIGS. 1 to 3.

ガスケット３０は、図１から図３に示すように、負極缶２０の周壁部２２の開口側に取り付けられる。すなわち、ガスケット３０は、負極缶２０の円筒状の周壁部２２と同様、略円筒状に形成されている。   As shown in FIGS. 1 to 3, the gasket 30 is attached to the opening side of the peripheral wall portion 22 of the negative electrode can 20. That is, the gasket 30 is formed in a substantially cylindrical shape like the cylindrical peripheral wall portion 22 of the negative electrode can 20.

ガスケット３０は、図２及び図３に示すように、内周側に位置するガスケット内側部３１と、外周側に位置するガスケット外側部３２と、ガスケット内側部３１及びガスケット外側部３２を繋ぐガスケット接続部３３とを有する。ガスケット内側部３１及びガスケット外側部３２は、それぞれ筒軸方向に延びる円筒状に形成されている。ガスケット接続部３３は、ガスケット内側部３１とガスケット外側部３２とを、それらの一端側同士で接続するように、該ガスケット内側部３１及びガスケット外側部３２に対して一体に形成されている。   As shown in FIGS. 2 and 3, the gasket 30 includes a gasket inner part 31 positioned on the inner peripheral side, a gasket outer part 32 positioned on the outer peripheral side, and a gasket connection that connects the gasket inner part 31 and the gasket outer part 32. Part 33. The gasket inner part 31 and the gasket outer part 32 are each formed in a cylindrical shape extending in the cylinder axis direction. The gasket connecting portion 33 is integrally formed with the gasket inner portion 31 and the gasket outer portion 32 so as to connect the gasket inner portion 31 and the gasket outer portion 32 at their one end sides.

ガスケット外側部３２には、図３に示すように、ガスケット接続部３３とは反対側に、ガスケット３０の内周側に膨出する膨出部３２ａが一体形成されている。ガスケット３０を負極缶２０の周壁部２２に装着した場合、ガスケット外側部３２の膨出部３２ａが負極缶２０の周壁部２２に引っ掛かって、ガスケット３０が負極缶２０から脱落するのを防止できる。   As shown in FIG. 3, a bulging portion 32 a that bulges toward the inner peripheral side of the gasket 30 is integrally formed on the gasket outer portion 32 on the side opposite to the gasket connection portion 33. When the gasket 30 is attached to the peripheral wall portion 22 of the negative electrode can 20, it is possible to prevent the bulging portion 32 a of the gasket outer portion 32 from being caught by the peripheral wall portion 22 of the negative electrode can 20 and dropping the gasket 30 from the negative electrode can 20.

図２に示すように、ガスケット内側部３１には、扁平形電池１の内部空間１ａの内方側で且つ正極缶１０の底部１１側に、Ｒ部３１ａが形成されている。すなわち、Ｒ部３１ａは、ガスケット内側部３１とガスケット接続部３３との間の部分に、略円筒状のガスケット内側部３１の内周全周に亘って形成されている。   As shown in FIG. 2, an R portion 31 a is formed in the gasket inner portion 31 on the inner side of the inner space 1 a of the flat battery 1 and on the bottom 11 side of the positive electrode can 10. That is, the R portion 31 a is formed in the portion between the gasket inner portion 31 and the gasket connection portion 33 over the entire inner circumference of the substantially cylindrical gasket inner portion 31.

Ｒ部３１ａは、ガスケット内側部３１の厚みＴの半分以上の曲率半径を有する。ここで、ガスケット内側部３１の厚みＴは、該ガスケット内側部３１の径方向の厚みで最も厚みが大きい部分の厚みである。   The R portion 31a has a radius of curvature that is at least half the thickness T of the gasket inner portion 31. Here, the thickness T of the gasket inner portion 31 is the thickness of the portion having the largest thickness in the radial direction of the gasket inner portion 31.

上述のようなＲ部３１ａをガスケット内側部３１に設けることにより、後述するように扁平形電池１を組み立てる際に、正極缶１０内に配置された電極体４０に、ガスケット３０が接触した場合でも、該電極体４０が損傷を受けるのを防止できる。すなわち、正極缶１０に負極缶２０を組み合わせる際に、該正極缶１０内に配置された電極体４０に、負極缶２０の周壁部２２に取り付けられたガスケット３０が接触する場合、該ガスケット３０のＲ部３１ａが電極体４０に接触する。そうすると、ガスケット３０に接触した電極体４０は、Ｒ部３１ａによって押されて正極缶１０の底部１１上を移動する。これにより、電極体４０が、ガスケットの角部分等によって損傷を受けるのを防止することができる。   Even when the gasket 30 is in contact with the electrode body 40 disposed in the positive electrode can 10 when the flat battery 1 is assembled as will be described later by providing the R portion 31a as described above in the gasket inner portion 31. The electrode body 40 can be prevented from being damaged. That is, when the negative electrode can 20 is combined with the positive electrode can 10, when the gasket 30 attached to the peripheral wall portion 22 of the negative electrode can 20 contacts the electrode body 40 disposed in the positive electrode can 10, The R portion 31 a contacts the electrode body 40. If it does so, the electrode body 40 which contacted the gasket 30 will be pushed by the R part 31a, and will move on the bottom part 11 of the positive electrode can 10. FIG. Thereby, it can prevent that the electrode body 40 is damaged by the corner | angular part etc. of a gasket.

特に、Ｒ部３１ａの曲率半径を、ガスケット内側部３１の厚みＴの半分以上の曲率半径とすることで、ガスケット内側部３１の内部空間１ａ側が電極体４０に接触した場合でも、該電極体４０に損傷を与えるのをより確実に防止できる。   In particular, by setting the radius of curvature of the R portion 31 a to be a radius of curvature that is more than half the thickness T of the gasket inner portion 31, even when the inner space 1 a side of the gasket inner portion 31 contacts the electrode body 40, the electrode body 40. Can be prevented more reliably.

また、例えば、ガスケットの内径を１７．１ｍｍ、電極体４０の外径を１６．３ｍｍとすると、Ｒ部３１ａの曲率半径は、０．２ｍｍ以上が好ましく、より好ましくは、０．３５ｍｍ以上である。   For example, when the inner diameter of the gasket is 17.1 mm and the outer diameter of the electrode body 40 is 16.3 mm, the radius of curvature of the R portion 31a is preferably 0.2 mm or more, and more preferably 0.35 mm or more. .

（扁平形電池の製造方法）
次に、図３及び図４を用いて、扁平形電池１の製造方法について説明する。 (Manufacturing method of flat battery)
Next, the manufacturing method of the flat battery 1 is demonstrated using FIG.3 and FIG.4.

まず、正極缶１０及び負極缶２０をプレス加工によって図３のような形状に成形するとともに、ガスケット３０も成形型によって図３のような形状に成形する。一方、正極４１及び負極４６を積層することにより、積層体４０を構成する。   First, the positive electrode can 10 and the negative electrode can 20 are formed into a shape as shown in FIG. 3 by pressing, and the gasket 30 is also formed into a shape as shown in FIG. On the other hand, the stacked body 40 is formed by stacking the positive electrode 41 and the negative electrode 46.

図３に示すように、正極缶１０内に電極体４０を配置して、正極リード５１を正極缶１０の底部１１に溶接する。一方、負極缶２０の周壁部２２にガスケット３０を装着する。そして、正極缶１０に対して負極缶２０を組み合わせる（白抜き矢印参照）。   As shown in FIG. 3, the electrode body 40 is disposed in the positive electrode can 10 and the positive electrode lead 51 is welded to the bottom 11 of the positive electrode can 10. On the other hand, the gasket 30 is attached to the peripheral wall portion 22 of the negative electrode can 20. Then, the negative electrode can 20 is combined with the positive electrode can 10 (see the white arrow).

このとき、ガスケット３０のガスケット内側部３１にはＲ部３１ａが形成されているため、該ガスケット内側部３１が積層体４０に接触しても、該積層体４０が損傷を受けるのを防止できる。   At this time, since the R portion 31 a is formed in the gasket inner portion 31 of the gasket 30, even if the gasket inner portion 31 contacts the laminate 40, the laminate 40 can be prevented from being damaged.

図４のように正極缶１０及び負極缶２０を組み合わせた状態で、正極缶１０の周壁部１２の開口側を該正極缶１０の内方に折り曲げて（図中の矢印参照）、負極缶２０の周壁部２２に嵌合させる。このとき、ガスケット３０は、正極缶１０の周壁部１２と負極缶２０の周壁部２２との間に挟み込まれる。これにより、図１に示すような扁平形電池１が得られる。   In the state where the positive electrode can 10 and the negative electrode can 20 are combined as shown in FIG. 4, the opening side of the peripheral wall portion 12 of the positive electrode can 10 is bent inward of the positive electrode can 10 (see the arrow in the figure), and the negative electrode can 20 The peripheral wall portion 22 is fitted. At this time, the gasket 30 is sandwiched between the peripheral wall portion 12 of the positive electrode can 10 and the peripheral wall portion 22 of the negative electrode can 20. Thereby, the flat battery 1 as shown in FIG. 1 is obtained.

（実施形態の効果）
以上より、この実施形態では、正極缶１０と負極缶２０との間に挟み込まれるガスケット３０のガスケット内側部３１に、Ｒ部３１ａを設ける。これにより、正極缶１０と負極缶２０とを組み合わせる際に、該負極缶２０の周壁部２２に取り付けられたガスケット３０が正極缶１０内に配置された電極体４０に接触した場合でも、該電極体４０が損傷を受けるのを防止できる。 (Effect of embodiment)
As described above, in this embodiment, the R portion 31 a is provided in the gasket inner portion 31 of the gasket 30 sandwiched between the positive electrode can 10 and the negative electrode can 20. Thereby, when the positive electrode can 10 and the negative electrode can 20 are combined, even if the gasket 30 attached to the peripheral wall portion 22 of the negative electrode can 20 contacts the electrode body 40 disposed in the positive electrode can 10, the electrode It is possible to prevent the body 40 from being damaged.

特に、Ｒ部３１ａの曲率半径を、ガスケット内側部３１の厚みＴの半分以上の曲率半径にすることで、ガスケット内側部３１の内部空間１ａ側が電極体４０に接触した場合でも、該ガスケット内側部３１によって電極体４０が損傷を受けるのをより確実に防止できる。   In particular, even when the inner space 1a side of the gasket inner portion 31 is in contact with the electrode body 40 by setting the radius of curvature of the R portion 31a to a radius of curvature greater than half the thickness T of the gasket inner portion 31, the gasket inner portion 31 can prevent the electrode body 40 from being damaged more reliably.

（その他の実施形態）
以上、本発明の実施の形態を説明したが、上述した実施の形態は本発明を実施するための例示に過ぎない。よって、本発明は上述した実施の形態に限定されることなく、その趣旨を逸脱しない範囲内で上述した実施の形態を適宜変形して実施することが可能である。 (Other embodiments)
While the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

前記実施形態では、ガスケット内側部３１に設けるＲ部３１ａを、ガスケット内側部３１の厚みＴの半分以上の曲率半径を有する形状としている。しかしながら、Ｒ部の曲率半径は、ガスケット内側部３１の厚みＴ以上の曲率半径であってもよい。こうすれば、ガスケット３０が電極体４０に接触した場合に、該電極体４０が損傷を受けるのをより確実に防止できる。   In the said embodiment, the R part 31a provided in the gasket inner part 31 is made into the shape which has a curvature radius more than half of the thickness T of the gasket inner part 31. FIG. However, the radius of curvature of the R portion may be a radius of curvature greater than the thickness T of the gasket inner portion 31. If it carries out like this, when the gasket 30 contacts the electrode body 40, it can prevent more reliably that this electrode body 40 is damaged.

前記実施形態では、ガスケット３０を、負極缶２０とは別体に設けて、該負極缶２０の周壁部２２に装着している。しかしながら、ガスケットを負極缶２０の周壁部２２にモールド成形してもよい。このようなモールド成形のガスケットの場合でも、負極缶２０の周壁部２２の内方に位置する部分に、Ｒ部を設けることにより、上述の実施形態と同様の効果が得られる。   In the embodiment, the gasket 30 is provided separately from the negative electrode can 20 and attached to the peripheral wall portion 22 of the negative electrode can 20. However, a gasket may be molded on the peripheral wall portion 22 of the negative electrode can 20. Even in the case of such a molded gasket, the same effect as that of the above-described embodiment can be obtained by providing the R portion in the portion located inward of the peripheral wall portion 22 of the negative electrode can 20.

前記実施形態では、電極体４０の正極リード５１を正極缶１０の底部１１に溶接しているが、この限りではなく、正極缶１０の底部１１に他の部材を介して電気的に接触させてもよい。   In the embodiment, the positive electrode lead 51 of the electrode body 40 is welded to the bottom part 11 of the positive electrode can 10. However, the present invention is not limited to this, and the bottom part 11 of the positive electrode can 10 is electrically contacted via another member. Also good.

前記実施形態では、負極缶１０を外装缶としていて、正極缶２０を封口缶としているが、逆に負極缶が封口缶で、正極缶が外装缶であってもよい。   In the embodiment, the negative electrode can 10 is an outer can and the positive electrode can 20 is a sealed can. Conversely, the negative electrode can may be a sealed can and the positive electrode can may be an outer can.

前記実施形態では、負極缶１０及び正極缶２０を、それぞれ有底円筒状に形成して、扁平形電池１をコイン状に形成したが、この限りではなく、扁平形電池を、多角柱状など、円柱状以外の形状に形成してもよい。   In the above embodiment, the negative electrode can 10 and the positive electrode can 20 are each formed in a bottomed cylindrical shape, and the flat battery 1 is formed in a coin shape. However, the present invention is not limited thereto, and the flat battery is formed in a polygonal column shape, etc. You may form in shapes other than column shape.

本発明による扁平形電池は、外装缶及び封口缶によって形成される内部空間に積層体が配置されるとともに、外装缶と封口缶との間にガスケットが挟み込まれる構成に利用可能である。   The flat battery according to the present invention can be used in a configuration in which a laminate is disposed in an internal space formed by an outer can and a sealed can, and a gasket is sandwiched between the outer can and the sealed can.

１：扁平形電池、１ａ：内部空間、１０：正極缶（外装缶）、１１：底部、１２：周壁部（外装缶周壁部）、２０：負極缶（封口缶）、２２：周壁部（封口缶周壁部）、３０：ガスケット、３１：ガスケット内側部、３１ａ：Ｒ部、３２：ガスケット外側部、３３：ガスケット接続部、４０：電極体（積層体）、４１：正極、４６：負極 1: flat battery, 1a: internal space, 10: positive electrode can (exterior can), 11: bottom, 12: peripheral wall (external can peripheral wall), 20: negative electrode can (sealing can), 22: peripheral wall (sealing) Can peripheral wall portion), 30: gasket, 31: gasket inner portion, 31a: R portion, 32: gasket outer portion, 33: gasket connecting portion, 40: electrode body (laminated body), 41: positive electrode, 46: negative electrode

Claims (5)

筒状の外装缶周壁部を有する有底筒状の外装缶と、
筒状の封口缶周壁部を有し、前記外装缶の開口側を覆うとともに前記外装缶周壁部が前記封口缶周壁部の開口部側に接続される有底筒状の封口缶と、
それぞれ平板状に形成された正極及び負極を厚み方向に積層することにより形成され、前記外装缶及び前記封口缶によって形成された内部空間内に収納される積層体と、
前記外装缶と前記封口缶との間に挟み込まれるガスケットとを備え、
前記ガスケットは、前記内部空間内に位置付けられるガスケット内側部を有し、
前記ガスケット内側部には、前記内部空間の内方側で且つ前記外装缶の底部側に、Ｒ部が設けられている、扁平形電池。 A bottomed cylindrical outer can having a cylindrical outer can peripheral wall, and
A cylindrical sealed can with a bottom, which has a cylindrical sealing can peripheral wall, covers the opening side of the outer can and the outer peripheral wall is connected to the opening of the sealing can peripheral wall,
A laminate that is formed by laminating a positive electrode and a negative electrode each formed in a flat plate shape in the thickness direction, and is housed in an internal space formed by the outer can and the sealing can, and
A gasket sandwiched between the outer can and the sealed can,
The gasket has a gasket inner portion positioned in the interior space;
A flat battery in which an R portion is provided on an inner side of the inner space and on a bottom side of the outer can on the inner side of the gasket. 請求項１に記載の扁平形電池において、
前記封口缶は、前記封口缶周壁部が前記外装缶周壁部の内方に位置するように、前記外装缶に対して組み合わされ、
前記ガスケット内側部は、前記封口缶周壁部の内方に位置し、
前記ガスケットは、前記封口缶周壁部の外方に位置するガスケット外側部と、前記ガスケット内側部と前記ガスケット外側部とを繋ぐガスケット接続部とをさらに有し、前記封口缶周壁部を挟み込むように配置される、扁平形電池。 The flat battery according to claim 1,
The sealed can is combined with the outer can so that the outer peripheral wall portion of the sealed can is located inside the outer peripheral wall portion of the outer can,
The gasket inner part is located inward of the sealing can peripheral wall part,
The gasket further includes a gasket outer part located outside the sealing can peripheral wall part, and a gasket connecting part that connects the gasket inner part and the gasket outer part, and sandwiches the sealing can peripheral wall part. Arranged flat battery. 請求項２に記載の扁平形電池において、
前記Ｒ部は、前記ガスケット内側部と前記ガスケット接続部との間に設けられている、扁平形電池。 The flat battery according to claim 2,
The R portion is a flat battery provided between the gasket inner portion and the gasket connecting portion. 請求項１から３のいずれか一つに記載の扁平形電池において、
前記ガスケット内側部は、前記封口缶周壁部に沿うように延びていて、
前記Ｒ部は、前記ガスケット内側部の厚みの半分以上の曲率半径を有する、扁平形電池。 The flat battery according to any one of claims 1 to 3,
The gasket inner part extends along the sealing can peripheral wall part,
The R portion has a radius of curvature that is at least half the thickness of the gasket inner portion. 請求項４に記載の扁平形電池において、
前記Ｒ部は、前記ガスケット内側部の厚み以上の曲率半径を有する、扁平形電池。 The flat battery according to claim 4,
The R portion is a flat battery having a radius of curvature equal to or greater than the thickness of the gasket inner portion.
JP2012179537A 2012-08-13 2012-08-13 Flat battery Active JP6122263B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012179537A JP6122263B2 (en) 2012-08-13 2012-08-13 Flat battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012179537A JP6122263B2 (en) 2012-08-13 2012-08-13 Flat battery

Publications (2)

Publication Number Publication Date
JP2014038744A true JP2014038744A (en) 2014-02-27
JP6122263B2 JP6122263B2 (en) 2017-04-26

Family

ID=50286724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012179537A Active JP6122263B2 (en) 2012-08-13 2012-08-13 Flat battery

Country Status (1)

Country Link
JP (1) JP6122263B2 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08153497A (en) * 1994-06-16 1996-06-11 Sony Corp Button shaped alkaline battery
JP2000243358A (en) * 1998-12-22 2000-09-08 Seiko Instruments Inc Nonaqueous electrolyte secondary battery
JP2002184368A (en) * 2000-12-15 2002-06-28 Toshiba Battery Co Ltd Coin-shaped nonaqueous electrolyte cell
JP2005026090A (en) * 2003-07-03 2005-01-27 Sii Micro Parts Ltd Electrochemical cell
JP2010165681A (en) * 2009-01-19 2010-07-29 Renata Ag Galvanic element for use in high stress
JP2011154784A (en) * 2010-01-26 2011-08-11 Hitachi Maxell Energy Ltd Flat nonaqueous secondary battery

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08153497A (en) * 1994-06-16 1996-06-11 Sony Corp Button shaped alkaline battery
JP2000243358A (en) * 1998-12-22 2000-09-08 Seiko Instruments Inc Nonaqueous electrolyte secondary battery
JP2002184368A (en) * 2000-12-15 2002-06-28 Toshiba Battery Co Ltd Coin-shaped nonaqueous electrolyte cell
JP2005026090A (en) * 2003-07-03 2005-01-27 Sii Micro Parts Ltd Electrochemical cell
JP2010165681A (en) * 2009-01-19 2010-07-29 Renata Ag Galvanic element for use in high stress
JP2011154784A (en) * 2010-01-26 2011-08-11 Hitachi Maxell Energy Ltd Flat nonaqueous secondary battery

Also Published As

Publication number Publication date
JP6122263B2 (en) 2017-04-26

Similar Documents

Publication Publication Date Title
US9017856B2 (en) Stacked battery with electrode having break portion
JP7246178B2 (en) electrochemical cell
JP6432952B1 (en) Electrochemical cell
US20220271399A1 (en) Battery
JP2017022057A (en) Outer package for battery
CN106133945B (en) Electricity storage device
JP7382780B2 (en) electrochemical cell
US10326122B2 (en) Rechargeable battery
JP6048341B2 (en) Terminal structure
JP6122263B2 (en) Flat battery
JP6254647B2 (en) Flat battery
JP6045799B2 (en) Flat battery
JP6001885B2 (en) Flat battery
JP5650567B2 (en) Flat battery and sealed can
JP5486356B2 (en) Flat battery
WO2023157229A1 (en) Secondary battery
JP2020053207A (en) Power storage element
JP5670270B2 (en) Battery unit
JP2014120449A (en) Flat battery
JP6032060B2 (en) Power storage device
JP5547523B2 (en) Flat battery
JP7040060B2 (en) Power storage element
WO2024062522A1 (en) Secondary battery and method for manufacturing secondary battery
JP7312743B2 (en) battery
JP5547522B2 (en) Flat battery

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20150515

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20160322

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20160405

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160525

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20160920

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20161111

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170314

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170331

R150 Certificate of patent or registration of utility model

Ref document number: 6122263

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250