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JP2024025362A - battery cell - Google Patents

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JP2024025362A
JP2024025362A JP2022128736A JP2022128736A JP2024025362A JP 2024025362 A JP2024025362 A JP 2024025362A JP 2022128736 A JP2022128736 A JP 2022128736A JP 2022128736 A JP2022128736 A JP 2022128736A JP 2024025362 A JP2024025362 A JP 2024025362A
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Prior art keywords
battery element
exterior film
positive electrode
battery
negative electrode
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JP2022128736A
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Japanese (ja)
Inventor
愛佳 大岡
Aika OOKA
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AESC Japan Ltd
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AESC Japan Ltd
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Priority to JP2022128736A priority Critical patent/JP2024025362A/en
Priority to US18/357,652 priority patent/US20240039091A1/en
Priority to US18/358,416 priority patent/US20240039092A1/en
Priority to EP23188515.3A priority patent/EP4325636A3/en
Priority to EP23188309.1A priority patent/EP4325638A3/en
Publication of JP2024025362A publication Critical patent/JP2024025362A/en
Priority to JP2025188131A priority patent/JP2026012942A/en
Pending legal-status Critical Current

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    • 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

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  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

【課題】外装フィルムの端部の露出を抑制する。【解決手段】電池セル１０は、電池要素１００と、電池要素１００に電気的に接続された正極タブ１１０と、電池要素１００の端部を覆い、正極タブ１１０が引き出される前方蓋材２１０と、少なくとも一部分が電池要素１００の周りに巻き付けられた外装フィルム３００と、を備えている。前方蓋材２１０の少なくとも一部分は、外装フィルム３００の端部の少なくとも一部分を覆っている。【選択図】図４An object of the present invention is to suppress exposure of the edges of an exterior film. A battery cell 10 includes a battery element 100, a positive electrode tab 110 electrically connected to the battery element 100, a front cover member 210 that covers an end of the battery element 100 and from which the positive electrode tab 110 is pulled out. and an exterior film 300 at least partially wrapped around the battery element 100. At least a portion of the front lid member 210 covers at least a portion of the end of the exterior film 300. [Selection diagram] Figure 4

Description

本発明は、電池セルに関する。 The present invention relates to battery cells.

近年、リチウムイオン二次電池セル等の電池セルの様々な構造が開発されている。例えば、特許文献１及び２に記載されている電池セルは、電池要素、２つの蓋材及び外装フィルムを備えている。２つの蓋材は、電池要素の長手方向の両端部を覆っている。外装フィルムは、電池要素の長手方向の周りに巻き付けられている。 In recent years, various structures of battery cells such as lithium ion secondary battery cells have been developed. For example, the battery cells described in Patent Documents 1 and 2 include a battery element, two lid members, and an exterior film. The two lids cover both longitudinal ends of the battery element. The outer film is wrapped around the length of the battery element.

国際公開第２０２１／１５７７３１号International Publication No. 2021/157731

例えば特許文献１に記載されている電池セルにおいて、外装フィルムを蓋材に巻き付けると、外装フィルムの端部が露出する。外装フィルムの端部が露出している場合、外装フィルムに含まれる導電性シート等の導体を介しての外装フィルムの短絡を抑制することが難しくなることがある。 For example, in the battery cell described in Patent Document 1, when the exterior film is wrapped around the lid material, the ends of the exterior film are exposed. When the edges of the exterior film are exposed, it may be difficult to suppress short circuits of the exterior film via a conductor such as a conductive sheet included in the exterior film.

本発明の目的の一例は、外装フィルムの端部の露出を抑制することにある。本発明の他の目的は、本明細書の記載から明らかになるであろう。 One example of the object of the present invention is to suppress exposure of the edges of the exterior film. Other objects of the invention will become apparent from the description herein.

本発明の一態様は、以下のとおりである。
［１］
電池要素と、
前記電池要素に電気的に接続されたタブと、
前記電池要素の端部を覆い、前記タブが引き出される蓋材と、
少なくとも一部分が前記電池要素の周りに巻き付けられた外装フィルムと、
を備え、
前記蓋材の少なくとも一部分が前記外装フィルムの端部の少なくとも一部分を覆っている、電池セル。
［２］
前記蓋材の少なくとも一部分が前記外装フィルムの外周面の少なくとも一部分を覆っている、［１］に記載の電池セル。
［３］
前記電池要素の前記端部の反対側の他の端部を覆う他の蓋材をさらに備える、［１］又は［２］に記載の電池セル。 One aspect of the present invention is as follows.
[1]
battery element;
a tab electrically connected to the battery element;
a lid member that covers an end of the battery element and from which the tab is pulled out;
an exterior film at least partially wrapped around the battery element;
Equipped with
A battery cell, wherein at least a portion of the lid material covers at least a portion of an end portion of the exterior film.
[2]
The battery cell according to [1], wherein at least a portion of the lid material covers at least a portion of the outer peripheral surface of the exterior film.
[3]
The battery cell according to [1] or [2], further comprising another lid material that covers the other end opposite to the end of the battery element.

本発明の上記態様によれば、外装フィルムの端部の露出を抑制することができる。 According to the above aspect of the present invention, exposure of the end portion of the exterior film can be suppressed.

実施形態に係る電池セルの前方斜視図である。FIG. 2 is a front perspective view of a battery cell according to an embodiment. 実施形態に係る電池セルの一部分の前方拡大斜視図である。FIG. 2 is an enlarged front perspective view of a portion of the battery cell according to the embodiment. 実施形態に係る電池セルの右側面図である。FIG. 2 is a right side view of a battery cell according to an embodiment. 図２のＡ－Ａ断面模式図である。3 is a schematic cross-sectional view taken along line AA in FIG. 2. FIG. 図４の変形例を示す図である。5 is a diagram showing a modification of FIG. 4. FIG.

以下、本発明の実施形態及び変形例について、図面を用いて説明する。すべての図面において、同様な構成要素には同様の符号を付し、適宜説明を省略する。 Embodiments and modifications of the present invention will be described below with reference to the drawings. In all the drawings, similar components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

図１は、実施形態に係る電池セル１０の前方斜視図である。図２は、実施形態に係る電池セル１０の一部分の前方拡大斜視図である。図３は、実施形態に係る電池セル１０の右側面図である。図４は、図２のＡ－Ａ断面模式図である。図３では、説明のため、外装フィルム３００を透過させた状態で図示している。 FIG. 1 is a front perspective view of a battery cell 10 according to an embodiment. FIG. 2 is an enlarged front perspective view of a portion of the battery cell 10 according to the embodiment. FIG. 3 is a right side view of the battery cell 10 according to the embodiment. FIG. 4 is a schematic cross-sectional view taken along line AA in FIG. In FIG. 3, for the sake of explanation, the exterior film 300 is shown in a transparent state.

各図には、説明のため、Ｘ方向、Ｙ方向及びＺ方向が付されている。Ｘ方向は、電池セル１０の前後方向を示している。Ｙ方向は、Ｘ方向に直交している。Ｙ方向は、電池セル１０の左右方向を示している。Ｚ方向は、Ｘ方向及びＹ方向の双方に直交している。Ｚ方向は、電池セル１０の上下方向を示している。Ｘ方向を示す矢印によって指し示される方向、Ｙ方向を示す矢印によって指し示される方向及びＺ方向を示す矢印によって指し示される方向は、それぞれ、後方向、左方向及び上方向である。ただし、電池セル１０のＸ方向、Ｙ方向、Ｚ方向、前後方向、左右方向及び上下方向の関係は、この例に限定されない。 Each figure is labeled with an X direction, a Y direction, and a Z direction for explanation. The X direction indicates the front-rear direction of the battery cell 10. The Y direction is perpendicular to the X direction. The Y direction indicates the left and right direction of the battery cell 10. The Z direction is perpendicular to both the X direction and the Y direction. The Z direction indicates the vertical direction of the battery cell 10. The direction indicated by the arrow indicating the X direction, the direction indicated by the arrow indicating the Y direction, and the direction indicated by the arrow indicating the Z direction are backward, leftward, and upward, respectively. However, the relationship of the battery cell 10 in the X direction, Y direction, Z direction, front and back direction, left and right direction, and up and down direction is not limited to this example.

なお、Ｘ方向、Ｙ方向又はＺ方向を示すＸ付き白丸は、紙面の手前から奥に向かう方向が当該方向を示す矢印によって指し示される方向であることを示している。 Note that a white circle with an X indicating the X direction, Y direction, or Z direction indicates that the direction from the front to the back of the page is the direction indicated by the arrow indicating the direction.

電池セル１０は、電池要素１００、正極タブ１１０、負極タブ１２０、前方蓋材２１０、後方蓋材２２０及び外装フィルム３００を備えている。外装フィルム３００は、巻付部分３０２及び引出部分３０４を有している。 The battery cell 10 includes a battery element 100, a positive electrode tab 110, a negative electrode tab 120, a front lid material 210, a rear lid material 220, and an exterior film 300. The exterior film 300 has a wrap portion 302 and a pull-out portion 304.

電池要素１００は、略直方体形状となっている。電池要素１００の長手方向は、Ｘ方向に略平行となっている。電池要素１００のＸ方向の長さは、以下に限定されないが、例えば、３００ｍｍ以上５００ｍｍ以下、好ましくは４５０ｍｍ以下である。電池要素１００の短手方向は、Ｚ方向に略平行となっている。電池要素１００のＺ方向の長さは、以下に限定されないが、例えば、９０ｍｍ以上１３０ｍｍ以下、好ましくは１２０ｍｍ以下である。電池要素１００の厚み方向は、Ｙ方向に略平行となっている。電池要素１００のＹ方向の厚さは、以下に限定されないが、例えば、２０ｍｍ以上５０ｍｍ以下、好ましくは４５ｍｍ以下である。ただし、電池要素１００の形状は、この例に限定されない。 The battery element 100 has a substantially rectangular parallelepiped shape. The longitudinal direction of the battery element 100 is approximately parallel to the X direction. The length of the battery element 100 in the X direction is, for example, not less than 300 mm and not more than 500 mm, preferably not more than 450 mm, although it is not limited to the following. The lateral direction of the battery element 100 is approximately parallel to the Z direction. Although the length of the battery element 100 in the Z direction is not limited to the following, for example, it is 90 mm or more and 130 mm or less, preferably 120 mm or less. The thickness direction of the battery element 100 is approximately parallel to the Y direction. Although the thickness of the battery element 100 in the Y direction is not limited to the following, for example, it is 20 mm or more and 50 mm or less, preferably 45 mm or less. However, the shape of battery element 100 is not limited to this example.

電池要素１００は、不図示の少なくとも１つの正極、不図示の少なくとも１つの負極及び不図示の少なくとも１つのセパレータを有している。例えば、複数の正極及び複数の負極がＹ方向に交互に積層されている。セパレータの少なくとも一部分は、Ｙ方向に隣り合う正極及び負極の間に位置している。例えば、複数枚のシート状のセパレータの各々がＹ方向に隣り合う正極及び負極の間に位置していてもよい。或いは、１枚のシート状のセパレータがＹ方向に隣り合う正極及び負極の間の領域を通過するつづら折り形状になっていてもよい。或いは、正極、負極及びセパレータは、セパレータが正極及び負極の間に配置されるように巻回されていてもよい。一例において、正極及び負極の一方の両面がセパレータによって覆われた状態で正極、負極及びセパレータは巻回されている。他の例において、正極、セパレータ及び負極をこの順に含む単位積層体を複数含む積層体が巻回されていてもよい。ただし、正極、負極及びセパレータの巻回構造は、これらの例に限定されない。 The battery element 100 has at least one positive electrode (not shown), at least one negative electrode (not shown), and at least one separator (not shown). For example, a plurality of positive electrodes and a plurality of negative electrodes are alternately stacked in the Y direction. At least a portion of the separator is located between a positive electrode and a negative electrode adjacent in the Y direction. For example, each of a plurality of sheet-like separators may be located between a positive electrode and a negative electrode adjacent to each other in the Y direction. Alternatively, one sheet-like separator may have a meandering shape passing through a region between a positive electrode and a negative electrode adjacent to each other in the Y direction. Alternatively, the positive electrode, negative electrode, and separator may be wound such that the separator is disposed between the positive electrode and the negative electrode. In one example, the positive electrode, the negative electrode, and the separator are wound so that both surfaces of one of the positive electrode and the negative electrode are covered with the separator. In another example, a laminate including a plurality of unit laminates including a positive electrode, a separator, and a negative electrode in this order may be wound. However, the winding structures of the positive electrode, negative electrode, and separator are not limited to these examples.

正極タブ１１０は、電池要素１００の前方に配置されている。正極タブ１１０の後端部は、正極集電体１０２ａに電気的に接続されている。正極集電体１０２ａは、電池要素１００の正極から前方に向けて引き出されている。これによって、正極タブ１１０は、電池要素１００の正極に電気的に接続されている。 Positive electrode tab 110 is arranged in front of battery element 100. The rear end of the positive electrode tab 110 is electrically connected to the positive electrode current collector 102a. The positive electrode current collector 102a is drawn out from the positive electrode of the battery element 100 toward the front. Thereby, the positive electrode tab 110 is electrically connected to the positive electrode of the battery element 100.

負極タブ１２０は、電池要素１００の後方に配置されている。負極タブ１２０の前端部は、負極集電体１０４ａに電気的に接続されている。負極集電体１０４ａは、電池要素１００の負極から後方に向けて引き出されている。これによって、負極タブ１２０は、電池要素１００の負極に電気的に接続されている。 Negative electrode tab 120 is arranged at the rear of battery element 100. The front end of the negative electrode tab 120 is electrically connected to the negative electrode current collector 104a. The negative electrode current collector 104a is drawn out from the negative electrode of the battery element 100 toward the rear. Thereby, the negative electrode tab 120 is electrically connected to the negative electrode of the battery element 100.

前方蓋材２１０は、電池要素１００の前端部を覆っている。前方蓋材２１０は、例えば、樹脂、金属等からなっている。前方蓋材２１０の前面からは、正極タブ１１０の前端部が引き出されている。前方から見て、前方蓋材２１０は、略長方形形状となっている。前方から見て、前方蓋材２１０の長手方向はＺ方向に略平行となっており、前方蓋材２１０の短手方向はＹ方向に略平行となっている。 The front lid member 210 covers the front end of the battery element 100. The front lid member 210 is made of, for example, resin, metal, or the like. A front end portion of the positive electrode tab 110 is pulled out from the front surface of the front lid member 210. When viewed from the front, the front lid member 210 has a substantially rectangular shape. When viewed from the front, the longitudinal direction of the front lid 210 is approximately parallel to the Z direction, and the lateral direction of the front lid 210 is approximately parallel to the Y direction.

後方蓋材２２０は、電池要素１００の後端部を覆っている。後方蓋材２２０は、例えば、樹脂、金属等からなっている。後方蓋材２２０の後面からは、負極タブ１２０の後端部が引き出されている。後方から見て、後方蓋材２２０は、略長方形形状となっている。後方から見て、後方蓋材２２０の長手方向はＺ方向に略平行となっており、後方蓋材２２０の短手方向はＹ方向に略平行となっている。 The rear lid member 220 covers the rear end of the battery element 100. The rear lid material 220 is made of, for example, resin, metal, or the like. A rear end portion of the negative electrode tab 120 is pulled out from the rear surface of the rear lid member 220. When viewed from the rear, the rear lid member 220 has a substantially rectangular shape. When viewed from the rear, the longitudinal direction of the rear lid 220 is approximately parallel to the Z direction, and the lateral direction of the rear lid 220 is approximately parallel to the Y direction.

図１及び図２に示すように、巻付部分３０２は、前方及び後方の双方に向けて開口した略筒形状となっている。巻付部分３０２の前方の開口の内部には、後述する前方凸部２１２を除いて前方蓋材２１０が配置されている。巻付部分３０２の後方の開口の内部には、後述する後方凸部２２２を除いて後方蓋材２２０が配置されている。巻付部分３０２は、電池要素１００、前方蓋材２１０及び後方蓋材２２０のＸ方向の周りに１周巻き付けられている。これによって、前方蓋材２１０、後方蓋材２２０及び巻付部分３０２は、電池要素１００を収容する収容空間５００を形成している。収容空間５００には、電池要素１００とともに、不図示の電解液が収容されている。なお、巻付部分３０２の電池要素１００の巻き付きの態様は、上述した例に限定されない。 As shown in FIGS. 1 and 2, the wrapped portion 302 has a substantially cylindrical shape that is open toward both the front and the rear. Inside the front opening of the wrapped portion 302, a front lid member 210 is arranged except for a front convex portion 212, which will be described later. Inside the rear opening of the wrapped portion 302, a rear lid member 220 is arranged except for a rear convex portion 222, which will be described later. The wrapped portion 302 is wound once around the battery element 100, the front cover member 210, and the rear cover member 220 in the X direction. Thereby, the front cover material 210, the rear cover material 220, and the wrapped portion 302 form an accommodation space 500 that accommodates the battery element 100. The accommodation space 500 accommodates an electrolytic solution (not shown) together with the battery element 100. Note that the manner in which the battery element 100 is wound around the winding portion 302 is not limited to the example described above.

前方蓋材２１０のＸ方向の周りの外周面と、巻付部分３０２の前方の開口のＸ方向の周りの内周面と、は例えば熱融着によって互いに接合されている。これによって、前方封止部５１０が形成されている。 The outer peripheral surface of the front lid member 210 around the X direction and the inner peripheral surface of the front opening of the wrapped portion 302 around the X direction are joined to each other by, for example, heat fusion. As a result, a front sealing portion 510 is formed.

後方蓋材２２０のＸ方向の周りの外周面と、巻付部分３０２の後方の開口のＸ方向の周りの内周面と、は例えば熱融着によって互いに接合されている。これによって、後方封止部５２０が形成されている。 The outer peripheral surface of the rear lid member 220 around the X direction and the inner peripheral surface of the rear opening of the wrapped portion 302 around the X direction are joined to each other by, for example, heat fusion. As a result, a rear sealing portion 520 is formed.

図１及び図２に示すように、前方から見て、引出部分３０４は、巻付部分３０２の電池要素１００の左上側の角から引き出されている。具体的には、図２に示すように、引出部分３０４は、第１引出部分３０４ａ及び第２引出部分３０４ｂを含んでいる。第１引出部分３０４ａは、巻付部分３０２のＸ方向の周りの周方向の両端の一方から引き出されている。第２引出部分３０４ｂは、巻付部分３０２のＸ方向の周りの周方向の両端の他方から引き出されている。第１引出部分３０４ａ及び第２引出部分３０４ｂは、例えば熱融着によって互いに接合されている。これによって、前方から見て、側方封止部５３０が形成されている。引出部分３０４は、電池要素１００の上面に沿って折り曲げられている。ただし、引出部分３０４は、折り曲げられていなくてもよい。また、引出部分３０４の折り曲げの形状は、実施形態に係る形状に限定されない。 As shown in FIGS. 1 and 2, the pull-out portion 304 is pulled out from the upper left corner of the battery element 100 of the wrapped portion 302 when viewed from the front. Specifically, as shown in FIG. 2, the drawer portion 304 includes a first drawer portion 304a and a second drawer portion 304b. The first drawn-out portion 304a is drawn out from one of both ends of the wrapped portion 302 in the circumferential direction around the X direction. The second drawn-out portion 304b is drawn out from the other of both ends of the wrapped portion 302 in the circumferential direction around the X direction. The first drawer portion 304a and the second drawer portion 304b are joined to each other by, for example, heat fusion. As a result, a side sealing portion 530 is formed when viewed from the front. The drawer portion 304 is bent along the top surface of the battery element 100. However, the drawer portion 304 does not have to be bent. Further, the shape of the folded portion 304 is not limited to the shape according to the embodiment.

図１、図２及び図４に示すように、前方蓋材２１０の外周面には、前方凸部２１２が設けられている。前方凸部２１２は、前方蓋材２１０の外周面の全周に設けられている。ただし、前方凸部２１２は、前方蓋材２１０の外周面の全周の一部分のみに設けられていてもよい。前方凸部２１２は、外装フィルム３００の前端部の前方に位置している。これによって、前方凸部２１２は、外装フィルム３００の前端部を覆っている。このため、外装フィルム３００の前端部の露出を前方凸部２１２によって抑制することができる。したがって、外装フィルム３００に含まれる導電性シート等の導体が外装フィルム３００の前端部から露出していても、当該導体を介しての外装フィルム３００の短絡を抑制することができる。 As shown in FIGS. 1, 2, and 4, a front convex portion 212 is provided on the outer peripheral surface of the front lid member 210. The front convex portion 212 is provided all around the outer peripheral surface of the front lid member 210. However, the front convex portion 212 may be provided only on a portion of the entire circumference of the outer peripheral surface of the front lid member 210. The front convex portion 212 is located in front of the front end of the exterior film 300. Thereby, the front convex portion 212 covers the front end portion of the exterior film 300. Therefore, exposure of the front end portion of the exterior film 300 can be suppressed by the front convex portion 212. Therefore, even if a conductor such as a conductive sheet included in the exterior film 300 is exposed from the front end of the exterior film 300, short circuiting of the exterior film 300 via the conductor can be suppressed.

図１に示すように、後方蓋材２２０の外周面には、前方蓋材２１０の外周面と同様にして、後方凸部２２２が設けられている。後方凸部２２２は、前方凸部２１２と同様にして、外装フィルム３００の後端部を覆っている。このため、外装フィルム３００の後端部の露出を後方凸部２２２によって抑制することができる。したがって、外装フィルム３００に含まれる導電性シート等の導体が外装フィルム３００の後端部から露出していても、当該導体を介しての外装フィルム３００の短絡を抑制することができる。 As shown in FIG. 1, a rear convex portion 222 is provided on the outer peripheral surface of the rear lid member 220 in the same way as the outer peripheral surface of the front lid member 210. The rear convex portion 222 covers the rear end portion of the exterior film 300 in the same way as the front convex portion 212 . Therefore, exposure of the rear end portion of the exterior film 300 can be suppressed by the rear convex portion 222. Therefore, even if a conductor such as a conductive sheet included in the exterior film 300 is exposed from the rear end of the exterior film 300, short circuiting of the exterior film 300 via the conductor can be suppressed.

実施形態では、前方凸部２１２及び後方凸部２２２の双方が設けられている。しかしながら、前方凸部２１２及び後方凸部２２２の一方のみが設けられていてもよい。 In the embodiment, both a front protrusion 212 and a rear protrusion 222 are provided. However, only one of the front convex portion 212 and the rear convex portion 222 may be provided.

次に、実施形態に係る電池セル１０の製造方法の一例について説明する。この例において、実施形態に係る電池セル１０は、以下のようにして製造されている。 Next, an example of a method for manufacturing the battery cell 10 according to the embodiment will be described. In this example, the battery cell 10 according to the embodiment is manufactured as follows.

まず、電池要素１００を製造する。電池要素１００は、少なくとも１つの正極、少なくとも１つの負極及び少なくとも１つのセパレータを有している。 First, the battery element 100 is manufactured. Battery element 100 has at least one positive electrode, at least one negative electrode, and at least one separator.

次いで、正極タブ１１０と、前方蓋材２１０と、を互いに接合させる。同様にして、負極タブ１２０と、後方蓋材２２０と、を互いに接合させる。次いで、正極タブ１１０と、正極集電体１０２ａと、を互いに接合させる。同様にして、負極タブ１２０と、負極集電体１０４ａと、を互いに接合させる。ただし、正極タブ１１０と正極集電体１０２ａとを互いに接合させた後、正極タブ１１０と前方蓋材２１０とを互いに接合させてもよい。同様にして、負極タブ１２０と負極集電体１０４ａとを互いに接合させた後、負極タブ１２０と後方蓋材２２０とを互いに接合させてもよい。 Next, the positive electrode tab 110 and the front lid member 210 are joined to each other. Similarly, the negative electrode tab 120 and the rear lid material 220 are joined to each other. Next, the positive electrode tab 110 and the positive electrode current collector 102a are joined to each other. Similarly, the negative electrode tab 120 and the negative electrode current collector 104a are bonded to each other. However, after the positive electrode tab 110 and the positive electrode current collector 102a are joined to each other, the positive electrode tab 110 and the front cover material 210 may be joined to each other. Similarly, after the negative electrode tab 120 and the negative electrode current collector 104a are bonded to each other, the negative electrode tab 120 and the rear cover material 220 may be bonded to each other.

次いで、外装フィルム３００を電池要素１００、前方蓋材２１０及び後方蓋材２２０のＸ方向の周りに１周巻き付ける。これによって、巻付部分３０２が形成される。また、外装フィルム３００の余長を引出部分３０４として引き出す。この状態において、外装フィルム３００の前端部の前方に前方凸部２１２が位置している。これによって、外装フィルム３００の前端部が前方凸部２１２によって覆われている。また、外装フィルム３００の後端部の後方に後方凸部２２２が位置している。これによって、外装フィルム３００の後端部が後方凸部２２２によって覆われている。 Next, the exterior film 300 is wrapped once around the battery element 100, the front lid material 210, and the rear lid material 220 in the X direction. As a result, a wrapped portion 302 is formed. Further, the extra length of the exterior film 300 is pulled out as a pull-out portion 304. In this state, the front convex portion 212 is located in front of the front end of the exterior film 300. As a result, the front end portion of the exterior film 300 is covered by the front convex portion 212. Further, a rear convex portion 222 is located behind the rear end portion of the exterior film 300. As a result, the rear end portion of the exterior film 300 is covered by the rear convex portion 222.

次いで、前方蓋材２１０のＸ方向の周りの外周面と、巻付部分３０２の前方の開口のＸ方向の周りの内周面と、を熱融着によって互いに接合する。これによって、前方封止部５１０が形成される。次いで、後方蓋材２２０のＸ方向の周りの外周面と、巻付部分３０２の後方の開口のＸ方向の周りの内周面と、を熱融着によって互いに接合する。これによって、後方封止部５２０が形成される。 Next, the outer peripheral surface of the front lid member 210 around the X direction and the inner peripheral surface of the front opening of the wrapped portion 302 around the X direction are joined to each other by heat fusion. As a result, a front sealing portion 510 is formed. Next, the outer peripheral surface of the rear lid member 220 around the X direction and the inner peripheral surface of the rear opening of the wrapped portion 302 around the X direction are joined to each other by heat fusion. As a result, a rear sealing portion 520 is formed.

次いで、第１引出部分３０４ａ及び第２引出部分３０４ｂの間の隙間を介して収容空間５００に電解液を注入する。次いで、第１引出部分３０４ａ及び第２引出部分３０４ｂの間の隙間を介して収容空間５００を真空引きする。次いで、第１引出部分３０４ａ及び第２引出部分３０４ｂを熱融着によって接合して側方封止部５３０を形成する。これによって、収容空間５００が真空封止される。 Next, the electrolytic solution is injected into the accommodation space 500 through the gap between the first drawn-out part 304a and the second drawn-out part 304b. Next, the accommodation space 500 is evacuated through the gap between the first drawer portion 304a and the second drawer portion 304b. Next, the first drawer portion 304a and the second drawer portion 304b are joined by heat fusion to form the side sealing portion 530. Thereby, the accommodation space 500 is vacuum sealed.

なお、収容空間５００の真空封止の方法は、上述した例に限定されない。他の例においては、まず、第１引出部分３０４ａ及び第２引出部分３０４ｂを熱融着によって接合して側方封止部５３０を形成する。次いで、前方蓋材２１０及び後方蓋材２２０の少なくとも一方に設けられた注液孔を介して収容空間５００に電解液を注入する。次いで、当該注液孔を介して収容空間５００を真空引きする。次いで、当該注液孔を所定の蓋材によって塞ぐ。 Note that the method of vacuum sealing the accommodation space 500 is not limited to the example described above. In another example, first, the first drawer portion 304a and the second drawer portion 304b are joined by heat fusion to form the side sealing portion 530. Next, the electrolytic solution is injected into the housing space 500 through a liquid injection hole provided in at least one of the front cover member 210 and the rear cover member 220. Next, the accommodation space 500 is evacuated through the liquid injection hole. Next, the liquid injection hole is closed with a predetermined lid material.

次いで、側方封止部５３０を電池要素１００の上面に沿って折り曲げる。 Next, the side sealing portion 530 is bent along the top surface of the battery element 100.

このようにして、電池セル１０が製造される。 In this way, the battery cell 10 is manufactured.

図５は、図４の変形例を示す図である。 FIG. 5 is a diagram showing a modification of FIG. 4.

変形例に係る電池セル１０Ａの前方蓋材２１０Ａは、前方被覆部２１２Ａを有している。前方被覆部２１２Ａは、外装フィルム３００の前端部と、外装フィルム３００の外周面の前端部の近傍部と、を覆っている。特に、収容空間５００の上方かつ外装フィルム３００の前端部の近傍において、前方被覆部２１２Ａは、側方封止部５３０の上面を覆っている。前方被覆部２１２Ａが外装フィルム３００の前端部の少なくとも一部分を覆う場合、外装フィルム３００に含まれる導電性シート等の導体が外装フィルム３００の前端部から露出していても、当該導体を介しての外装フィルム３００の短絡を抑制することができる。前方被覆部２１２Ａが外装フィルム３００の外周面の少なくとも一部分を覆う場合、外装フィルム３００の前端部の位置を前方被覆部２１２Ａによって固定することができる。 A front lid member 210A of a battery cell 10A according to the modification includes a front covering portion 212A. The front covering portion 212A covers the front end of the exterior film 300 and the vicinity of the front end of the outer peripheral surface of the exterior film 300. In particular, above the housing space 500 and near the front end of the exterior film 300, the front covering section 212A covers the upper surface of the side sealing section 530. When the front covering portion 212A covers at least a portion of the front end of the exterior film 300, even if a conductor such as a conductive sheet included in the exterior film 300 is exposed from the front end of the exterior film 300, the Short circuits of the exterior film 300 can be suppressed. When the front covering part 212A covers at least a portion of the outer peripheral surface of the exterior film 300, the position of the front end of the exterior film 300 can be fixed by the front covering part 212A.

一例において、前方被覆部２１２Ａは、実施形態に係る前方凸部２１２を変形させることで形成することができる。例えば、実施形態に係る電池セル１０の製造方法のすべての工程を終了した後、前方凸部２１２に熱を加えながら前方凸部２１２を押しつぶすことで、前方凸部２１２を構成する材料を後方に向けて流動させる。これによって、前方凸部２１２を構成する材料は、外装フィルム３００の前端部だけでなく、外装フィルム３００の外周面も覆うようになる。特に、前方凸部２１２を変形させる前に、側方封止部５３０が電池要素１００に沿って折り曲げられている場合、側方封止部５３０の外面を前方被覆部２１２Ａによって覆うことができる。 In one example, the front covering portion 212A can be formed by deforming the front convex portion 212 according to the embodiment. For example, after completing all the steps of the method for manufacturing the battery cell 10 according to the embodiment, the material constituting the front protrusion 212 is moved backward by crushing the front protrusion 212 while applying heat to the front protrusion 212. Make it flow towards the target. As a result, the material forming the front convex portion 212 covers not only the front end portion of the exterior film 300 but also the outer circumferential surface of the exterior film 300. In particular, when the side sealing part 530 is bent along the battery element 100 before deforming the front convex part 212, the outer surface of the side sealing part 530 can be covered by the front covering part 212A.

図５に示す例では、前方蓋材２１０Ａの構造について説明した。図５における前方蓋材２１０Ａの構造は、後方蓋材にも同様に適用可能である。 In the example shown in FIG. 5, the structure of the front lid material 210A has been described. The structure of the front lid material 210A in FIG. 5 is similarly applicable to the rear lid material.

以上、図面を参照して本発明の実施形態及び変形例について述べたが、これらは本発明の例示であり、上記以外の様々な構成を採用することもできる。 Although the embodiments and modified examples of the present invention have been described above with reference to the drawings, these are merely examples of the present invention, and various configurations other than those described above may also be adopted.

例えば、実施形態では、正極タブ１１０及び負極タブ１２０が電池要素１００のＸ方向の互いに反対側に配置されている。しかしながら、正極タブ１１０及び負極タブ１２０の双方が電池要素１００のＸ方向の前側及び後側の一方のみに配置されていてもよい。この場合、電池要素１００の前端部及び後端部は、例えば、２つの蓋材によって覆われている。或いは、電池要素１００の正極タブ１１０及び負極タブ１２０が引き出された側のみが蓋材によって覆われていてもよい。この例において、電池要素１００の蓋材の反対側において、外装フィルム３００が封止されて電池要素１００に沿って折りたたまれていてもよい。 For example, in the embodiment, the positive electrode tab 110 and the negative electrode tab 120 are arranged on opposite sides of the battery element 100 in the X direction. However, both the positive electrode tab 110 and the negative electrode tab 120 may be arranged only on one of the front side and the rear side of the battery element 100 in the X direction. In this case, the front end and rear end of the battery element 100 are covered by, for example, two lid members. Alternatively, only the side of the battery element 100 from which the positive electrode tab 110 and the negative electrode tab 120 are pulled out may be covered with the lid material. In this example, the exterior film 300 may be sealed and folded along the battery element 100 on the opposite side of the lid material of the battery element 100.

１０，１０Ａ 電池セル
１００ 電池要素
１０２ａ 正極集電体
１０４ａ 負極集電体
１１０ 正極タブ
１２０ 負極タブ
２１０，２１０Ａ 前方蓋材
２１２ 前方凸部
２１２Ａ 前方被覆部
２２０ 後方蓋材
２２２ 後方凸部
３００ 外装フィルム
３０２ 巻付部分
３０４ 引出部分
３０４ａ 第１引出部分
３０４ｂ 第２引出部分
５００ 収容空間
５１０ 前方封止部
５２０ 後方封止部
５３０ 側方封止部 10, 10A Battery cell 100 Battery element 102a Positive electrode current collector 104a Negative electrode current collector 110 Positive electrode tab 120 Negative electrode tab 210, 210A Front lid material 212 Front convex portion 212A Front covering portion 220 Rear lid material 222 Rear convex portion 300 Exterior film 302 Wrapping portion 304 Drawer portion 304a First drawer portion 304b Second drawer portion 500 Accommodation space 510 Front sealing portion 520 Rear sealing portion 530 Side sealing portion

Claims (3)

電池要素と、
前記電池要素に電気的に接続されたタブと、
前記電池要素の端部を覆い、前記タブが引き出される蓋材と、
少なくとも一部分が前記電池要素の周りに巻き付けられた外装フィルムと、
を備え、
前記蓋材の少なくとも一部分が前記外装フィルムの端部の少なくとも一部分を覆っている、電池セル。 battery element;
a tab electrically connected to the battery element;
a lid member that covers an end of the battery element and from which the tab is pulled out;
an exterior film at least partially wrapped around the battery element;
Equipped with
A battery cell, wherein at least a portion of the lid material covers at least a portion of an end portion of the exterior film. 前記蓋材の少なくとも一部分が前記外装フィルムの外周面の少なくとも一部分を覆っている、請求項１に記載の電池セル。 The battery cell according to claim 1, wherein at least a portion of the lid material covers at least a portion of an outer peripheral surface of the exterior film. 前記電池要素の前記端部の反対側の他の端部を覆う他の蓋材をさらに備える、請求項１又は２に記載の電池セル。 The battery cell according to claim 1 or 2, further comprising another lid material that covers the other end of the battery element opposite to the end.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024204826A1 (en) * 2023-03-29 2024-10-03 大日本印刷株式会社 Electric power storage device, fixing jig, and method for manufacturing electric power storage device
WO2025005293A1 (en) * 2023-06-28 2025-01-02 大日本印刷株式会社 Power storage device, lid member, and method for manufacturing power storage device
WO2025187562A1 (en) * 2024-03-06 2025-09-12 株式会社Ａｅｓｃジャパン Battery cell and battery module

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08329972A (en) * 1995-05-30 1996-12-13 Sony Corp Battery
JP2004281156A (en) * 2003-03-14 2004-10-07 Toyo Aluminium Kk Vessel for electricity storage, vessel collective body for electricity storage, and manufacturing method thereof
JP2008262803A (en) * 2007-04-12 2008-10-30 Sony Corp Battery pack
JP2010067524A (en) * 2008-09-11 2010-03-25 Inoac Corp Container for power storage device
JP2011108626A (en) * 2009-11-16 2011-06-02 Samsung Sdi Co Ltd Lithium polymer secondary battery
JP2011108623A (en) * 2009-11-16 2011-06-02 Samsung Sdi Co Ltd Secondary battery
EP2424008A1 (en) * 2010-08-31 2012-02-29 SB LiMotive Co., Ltd. Rechargeable battery
JP2012099252A (en) * 2010-10-29 2012-05-24 Mitsubishi Heavy Ind Ltd Secondary battery
JP2014216307A (en) * 2013-04-30 2014-11-17 藤森工業株式会社 Sealing member and container for power storage device
US20170104193A1 (en) * 2015-10-07 2017-04-13 Sk Innovation Co., Ltd. Lithium secondary battery
WO2021075733A1 (en) * 2019-10-14 2021-04-22 주식회사 엘지화학 Battery cell, battery module comprising same battery cell, and battery pack comprising same battery module
JP2023084025A (en) * 2021-12-06 2023-06-16 トヨタ自動車株式会社 secondary battery

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08329972A (en) * 1995-05-30 1996-12-13 Sony Corp Battery
JP2004281156A (en) * 2003-03-14 2004-10-07 Toyo Aluminium Kk Vessel for electricity storage, vessel collective body for electricity storage, and manufacturing method thereof
JP2008262803A (en) * 2007-04-12 2008-10-30 Sony Corp Battery pack
JP2010067524A (en) * 2008-09-11 2010-03-25 Inoac Corp Container for power storage device
JP2011108626A (en) * 2009-11-16 2011-06-02 Samsung Sdi Co Ltd Lithium polymer secondary battery
JP2011108623A (en) * 2009-11-16 2011-06-02 Samsung Sdi Co Ltd Secondary battery
EP2424008A1 (en) * 2010-08-31 2012-02-29 SB LiMotive Co., Ltd. Rechargeable battery
JP2012099252A (en) * 2010-10-29 2012-05-24 Mitsubishi Heavy Ind Ltd Secondary battery
JP2014216307A (en) * 2013-04-30 2014-11-17 藤森工業株式会社 Sealing member and container for power storage device
US20170104193A1 (en) * 2015-10-07 2017-04-13 Sk Innovation Co., Ltd. Lithium secondary battery
WO2021075733A1 (en) * 2019-10-14 2021-04-22 주식회사 엘지화학 Battery cell, battery module comprising same battery cell, and battery pack comprising same battery module
JP2023084025A (en) * 2021-12-06 2023-06-16 トヨタ自動車株式会社 secondary battery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024204826A1 (en) * 2023-03-29 2024-10-03 大日本印刷株式会社 Electric power storage device, fixing jig, and method for manufacturing electric power storage device
JP7640007B1 (en) * 2023-03-29 2025-03-05 大日本印刷株式会社 Electricity storage device, fixture, and method for manufacturing an electricity storage device
WO2025005293A1 (en) * 2023-06-28 2025-01-02 大日本印刷株式会社 Power storage device, lid member, and method for manufacturing power storage device
JP2025128413A (en) * 2023-06-28 2025-09-02 大日本印刷株式会社 Electricity storage device, lid, and method for manufacturing an electricity storage device
WO2025187562A1 (en) * 2024-03-06 2025-09-12 株式会社Ａｅｓｃジャパン Battery cell and battery module

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