JP2016054039A - Method for manufacturing power storage device and power storage device - Google Patents

Method for manufacturing power storage device and power storage device Download PDF

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JP2016054039A
JP2016054039A JP2014178824A JP2014178824A JP2016054039A JP 2016054039 A JP2016054039 A JP 2016054039A JP 2014178824 A JP2014178824 A JP 2014178824A JP 2014178824 A JP2014178824 A JP 2014178824A JP 2016054039 A JP2016054039 A JP 2016054039A
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mixture layer
layer non
electrode mixture
forming
power generation
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増田　英樹
Hideki Masuda
英樹 増田
北野　真也
Shinya Kitano
真也 北野
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GS Yuasa Corp
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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
    • 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

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Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a power storage device, by which when forming the mixture layer non-forming part of a power-generating element, damage to the mixture layer non-forming part can be suppressed.SOLUTION: A method for manufacturing a battery 1 including a power-generating element 2 arranged by winding a positive electrode 3 including a positive electrode mixture layer forming part R1 where a positive electrode mixture layer 32 is formed on a positive electrode collector 31, and a positive electrode mixture layer non-forming part R2 where the positive electrode mixture layer 32 is not formed, and a separator 5 comprises a step of: putting the power-generating element 2 under a reduced-pressure environment with an inner peripheral side jig 20 disposed on an inner peripheral part 2a in the positive electrode mixture layer non-forming part R2 of the power-generating element 2, thereby pressing the positive electrode mixture layer non-forming part R2 from an outer peripheral portion 2b of the power-generating element 2 toward the inner peripheral part 2a.SELECTED DRAWING: Figure 2

Description

本発明は、蓄電素子の製造方法及び蓄電素子に関し、特に、合剤層非形成部を含む蓄電素子の製造方法及びこの製造方法により製造される蓄電素子に関する。   The present invention relates to a method for manufacturing a power storage element and a power storage element, and more particularly to a method for manufacturing a power storage element including a mixture layer non-forming portion and a power storage element manufactured by the manufacturing method.

従来、合剤層非形成部を含む電池の製造方法が知られている（たとえば、特許文献１参照）。   Conventionally, a method for manufacturing a battery including a mixture layer non-forming portion is known (see, for example, Patent Document 1).

上記特許文献１には、電極集電体上に活物質（合剤層）が形成されている活物質形成部および活物質が形成されていない活物質非形成部を含む電極とセパレータとを巻回した発電要素を備える電池の製造方法が開示されている。この電池の製造方法は、発電要素の層間及び外周部に銅製のクシ歯を配置し、銅製の加圧部材（押圧部材）を用いてクシ歯とともに活物質非形成部を挟み込んで活物質非形成部をフォーミングする（活物質非形成部の形状を整える）工程を備えている。   In Patent Document 1, an electrode including an active material forming portion where an active material (mixture layer) is formed on an electrode current collector and an active material non-forming portion where no active material is formed and a separator are wound. A method of manufacturing a battery including a rotated power generation element is disclosed. In this method of manufacturing a battery, copper comb teeth are arranged between the power generation element and the outer periphery, and an active material non-formation portion is formed by sandwiching the active material non-formation portion together with the comb teeth using a copper pressure member (pressing member). Forming a portion (to adjust the shape of the active material non-forming portion).

特開２００２−３７３６４０号公報JP 2002-373640 A

しかしながら、上記特許文献１の電池の製造方法では、銅製のクシ歯及び加圧部材（押圧部材）により活物質非形成部を挟み込んで活物質非形成部をフォーミングする際に、活物質非形成部に負荷が掛かり、その結果、活物質非形成部を損傷する場合がある。   However, in the battery manufacturing method of Patent Document 1, when the active material non-forming part is formed by sandwiching the active material non-forming part between the copper comb teeth and the pressure member (pressing member), the active material non-forming part is formed. As a result, the active material non-formation part may be damaged.

本発明は、上記のような課題を解決するためになされたものであり、本発明の１つの目的は、合剤層非形成部をフォーミングする（合剤層非形成部の形状を整える）際に、合剤層非形成部が損傷するのを抑制することが可能な蓄電素子の製造方法及びその製造方法により製造される蓄電素子を提供することである。   The present invention has been made to solve the above-described problems, and one object of the present invention is to form a mixture layer non-formation portion (to adjust the shape of the mixture layer non-formation portion). Furthermore, it is providing the electrical storage element manufactured by the manufacturing method of the electrical storage element which can suppress that a mixture layer non-formation part is damaged, and its manufacturing method.

この発明の第１の局面による蓄電素子の製造方法は、電極集電体上に合剤層が形成されている合剤層形成部および合剤層が形成されていない合剤層非形成部を含む電極とセパレータとを巻回した発電要素を備える蓄電素子の製造方法であって、合剤層非形成部成形治具を発電要素の合剤層非形成部における内周部に配置した状態で、発電要素を減圧環境下に置くことによって、発電要素の外周部から内周部に向かって合剤層非形成部を押圧する工程を備える。   According to a first aspect of the present invention, there is provided a method for manufacturing a power storage element comprising: a mixture layer forming portion in which a mixture layer is formed on an electrode current collector; and a mixture layer non-forming portion in which no mixture layer is formed. A power storage element manufacturing method including a power generation element in which an electrode and a separator are wound, wherein a mixture layer non-formation part forming jig is disposed on an inner peripheral portion of a power generation element in a mixture layer non-formation part The step of pressing the mixture layer non-forming part from the outer peripheral part of the power generating element toward the inner peripheral part by placing the power generating element in a reduced pressure environment is provided.

この発明の第１の局面による蓄電素子の製造方法では、上記のように、合剤層非形成部成形治具を発電要素の合剤層非形成部における内周部に配置した状態で、発電要素を減圧環境下に置くことによって、発電要素の外周部から内周部に向かって合剤層非形成部を押圧する工程を設けることにより、金属製のクシ歯及び加圧部材により合剤層非形成部を挟み込んで合剤層非形成部をフォーミングする（合剤層非形成部の形状を整える）場合と異なり、減圧時に大気圧によって押圧されることにより合剤層非形成部をフォーミングすることができる。これにより、フォーミングの際に合剤層非形成部に掛かる負荷を低減することができる。その結果、合剤層非形成部が損傷するのを抑制することができる。   In the electrical storage element manufacturing method according to the first aspect of the present invention, as described above, in the state where the mixture layer non-forming part forming jig is disposed on the inner peripheral part of the power generation element in the mixture layer non-forming part, By placing the element in a reduced pressure environment, a step of pressing the mixture layer non-forming part from the outer peripheral part to the inner peripheral part of the power generation element is provided, so that the mixture layer is formed by the metal comb teeth and the pressure member. Unlike the case where the non-formation part is sandwiched to form the mixture layer non-formation part (the shape of the mixture layer non-formation part is adjusted), the mixture layer non-formation part is formed by being pressed by atmospheric pressure during decompression. be able to. Thereby, the load concerning a mixture layer non-formation part in the case of forming can be reduced. As a result, the mixture layer non-formed part can be prevented from being damaged.

なお、本発明における内周部とは、巻回した発電要素の最も内側の部分（面）の内側を示す概念である。また、本発明における外周部とは、巻回した発電要素の最も外側の部分（面）の外側を示す概念である。   In addition, the inner peripheral part in this invention is the concept which shows the inner side of the innermost part (surface) of the wound electric power generation element. Moreover, the outer peripheral part in this invention is the concept which shows the outer side of the outermost part (surface) of the wound electric power generation element.

この第２の局面による蓄電素子の製造方法は、電極集電体上に合剤層が形成されている合剤層形成部および合剤層が形成されていない合剤層非形成部を含む電極とセパレータとを巻回した発電要素を備える蓄電素子の製造方法であって、電極集電体は、金属製であり、合剤層非形成部成形治具を発電要素の合剤層非形成部における内周部に配置した状態で、電極集電体よりも柔らかい部材によって、発電要素の外周部から内周部に向かって合剤層非形成部を押圧する工程を備える。   The method for manufacturing an electricity storage device according to the second aspect includes an electrode including a mixture layer forming portion in which a mixture layer is formed on an electrode current collector and a mixture layer non-forming portion in which the mixture layer is not formed And a separator, and a method for producing a power storage element, wherein the electrode current collector is made of metal, and a mixture layer non-formation part forming jig is used as a mixture layer non-formation part of the power generation element The step of pressing the mixture layer non-forming portion from the outer peripheral portion of the power generation element toward the inner peripheral portion with a member softer than the electrode current collector in a state of being arranged on the inner peripheral portion.

この発明の第２の局面による蓄電素子の製造方法では、上記のように、合剤層非形成部成形治具を発電要素の合剤層非形成部における内周部に配置した状態で、金属製の電極集電体よりも柔らかい部材によって、発電要素の外周部から内周部に向かって合剤層非形成部を押圧する工程を設けることにより、金属製のクシ歯及び加圧部材により合剤層非形成部を挟み込んで合剤層非形成部をフォーミングする（合剤層非形成部の形状を整える）場合と異なり、金属製の電極集電体よりも柔らかい部材により合剤層非形成部をフォーミングすることができる。これにより、フォーミングの際に合剤層非形成部に掛かる負荷を低減することができる。その結果、合剤層非形成部が損傷するのを抑制することができる。   In the method for manufacturing the electricity storage device according to the second aspect of the present invention, as described above, the metal mixture layer non-forming part forming jig is disposed on the inner peripheral part of the power generating element in the mixture layer non-forming part, The process of pressing the mixture layer non-formed part from the outer peripheral part of the power generation element toward the inner peripheral part with a member softer than the electrode collector made of metal, the metal comb teeth and the pressure member Unlike the case where the mixture layer non-formed part is formed by sandwiching the material layer non-formed part (the shape of the mixture layer non-formed part is adjusted), the mixture layer is not formed by a member softer than the metal electrode current collector. The part can be formed. Thereby, the load concerning a mixture layer non-formation part in the case of forming can be reduced. As a result, the mixture layer non-formed part can be prevented from being damaged.

上記第１または第２の局面による蓄電素子の製造方法において、好ましくは、発電要素は、巻回軸線が延びる方向から見て、略長円形状であり、合剤層非形成部成形治具としての内周側治具を発電要素の合剤層非形成部における内周部に配置し、かつ、内周側治具とは異なる外周側治具を発電要素の合剤層非形成部における曲面形状を有する部分の外周部に配置した状態で、発電要素の外周部から内周部に向かって合剤層非形成部を押圧する。このように構成すれば、合剤層非形成部をフォーミングする際に形状が歪みやすい発電要素の合剤層非形成部における曲面形状を有する部分の外周部に外周側治具を配置した状態で、合剤層非形成部をフォーミングすることができるので、合剤層非形成部を損傷するのを抑制しながら、歪むのを抑制して精度よく合剤層非形成部をフォーミングすることができる。なお、「長円形状」は、長円形状（長手方向に延びる一対の直線部を含み一対の直線部の端部が半円により接続されるような形状）および楕円形状を含む概念である。   In the method for manufacturing a power storage element according to the first or second aspect, preferably, the power generation element has a substantially oval shape when viewed from the direction in which the winding axis extends, and is used as a mixture layer non-forming part forming jig. The inner peripheral side jig is disposed on the inner peripheral portion of the power generation element mixture layer non-forming portion, and the outer peripheral side jig different from the inner peripheral side jig is a curved surface in the power generation element mixture layer non-forming portion. The mixture layer non-forming part is pressed from the outer peripheral part of the power generation element toward the inner peripheral part in a state of being arranged on the outer peripheral part of the part having the shape. If comprised in this way, in the state which has arrange | positioned the outer peripheral side jig | tool at the outer peripheral part of the part which has the curved-surface shape in the mixture layer non-formation part of the power generation element in which a shape is easy to distort when forming the mixture layer non-formation part. Since the mixture layer non-formation part can be formed, the mixture layer non-formation part can be accurately formed while suppressing the distortion while suppressing the damage to the mixture layer non-formation part. . The “oval shape” is a concept including an oval shape (a shape including a pair of linear portions extending in the longitudinal direction and connecting ends of the pair of linear portions by a semicircle) and an elliptical shape.

上記第１または第２の局面による蓄電素子の製造方法において、好ましくは、発電要素の巻回軸線が延びる方向から見て、合剤層非形成部成形治具を発電要素の合剤層非形成部における内周部の略全体と接触するように発電要素の合剤層非形成部における内周部に嵌め込んだ状態で、発電要素の外周部から内周部に向かって合剤層非形成部を押圧する。このように構成すれば、発電要素の巻回軸線が延びる方向から見て、発電要素の合剤層非形成部の略全体を均一にフォーミングすることができる。   In the method for manufacturing an electricity storage element according to the first or second aspect, preferably, the mixture layer non-forming part forming jig is not formed with the mixture layer of the power generation element when viewed from the direction in which the winding axis of the power generation element extends. The mixture layer is not formed from the outer peripheral part of the power generation element toward the inner peripheral part in a state of being fitted to the inner peripheral part of the mixture layer non-formation part of the power generation element so as to be in contact with substantially the entire inner peripheral part of the power generation part. Press the part. If comprised in this way, it can form uniformly the whole mixture layer non-formation part of an electric power generation element seeing from the direction where the winding axis line of an electric power generation element extends.

この発明の第３の局面による蓄電素子は、上記第１または第２の局面による蓄電素子の製造方法を用いて製造される。   A power storage device according to a third aspect of the present invention is manufactured using the method for manufacturing a power storage device according to the first or second aspect.

この発明の第３の局面では、上記第１または第２の局面による蓄電素子の製造方法を用いることによって、合剤層非形成部をフォーミングする際に、合剤層非形成部が損傷するのが抑制された蓄電素子を得ることができる。   In the third aspect of the present invention, the mixture layer non-formed part is damaged when the mixture layer non-formed part is formed by using the method for manufacturing the electricity storage device according to the first or second aspect. It is possible to obtain a power storage element in which is suppressed.

本発明によれば、上記のように、合剤層非形成部をフォーミングする際に、合剤層非形成部が損傷するのを抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, when forming a mixture layer non-formation part as mentioned above, it can suppress that a mixture layer non-formation part is damaged.

本発明の第１実施形態による電池を示した図である。It is the figure which showed the battery by 1st Embodiment of this invention. 本発明の第１実施形態による電池のＸ方向に沿った断面図である。1 is a cross-sectional view along the X direction of a battery according to a first embodiment of the present invention. 本発明の第１実施形態による電池の正極合剤層非形成部におけるＸ方向に垂直な方向の断面図である。FIG. 3 is a cross-sectional view in a direction perpendicular to the X direction in the positive electrode mixture layer non-forming portion of the battery according to the first embodiment of the present invention. 本発明の第１実施形態による電池に配置される内周側治具を示した図である。It is the figure which showed the inner peripheral side jig | tool arrange | positioned at the battery by 1st Embodiment of this invention. 本発明の第１実施形態による電池に配置される外周側治具を示した図である。It is the figure which showed the outer peripheral side jig | tool arrange | positioned at the battery by 1st Embodiment of this invention. 本発明の第１実施形態による電池を減圧環境下に配置する前の正極合剤層非形成部におけるＸ方向に沿った断面図である。It is sectional drawing along the X direction in the positive mix layer non-formation part before arrange | positioning the battery by 1st Embodiment of this invention in a pressure-reduced environment. 本発明の第１実施形態による電池を減圧環境下に配置する前の正極合剤層非形成部におけるＸ方向に垂直な方向の断面図である。It is sectional drawing of the direction perpendicular | vertical to the X direction in the positive mix layer non-formation part before arrange | positioning the battery by 1st Embodiment of this invention in a pressure-reduced environment. 本発明の第２実施形態による電池を押圧部材により押圧する前のＸ方向に垂直な方向の断面を示した図である。It is the figure which showed the cross section of the direction perpendicular | vertical to the X direction before pressing the battery by 2nd Embodiment of this invention with a pressing member. 本発明の第２実施形態による電池を押圧部材により押圧する前のＸ方向に沿った断面図である。It is sectional drawing along the X direction before pressing the battery by 2nd Embodiment of this invention with a pressing member. 本発明の第１実施形態又は第２実施形態による電池を複数個集合して構成した蓄電装置を示す概略図である。It is the schematic which shows the electrical storage apparatus comprised by gathering together the battery by 1st Embodiment or 2nd Embodiment of this invention.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（第１実施形態）
まず、図１〜図３を参照して、本発明の第１実施形態による蓄電素子としての電池１の構成について説明する。なお、図２及び図３においては後述する内周側治具２０を図示し、図３においては後述する外面側治具２１を図示しているが、内周側治具２０及び外面側治具２１は、電池１の製造時にのみ使用され、完成した状態では取り外される。 (First embodiment)
First, with reference to FIGS. 1-3, the structure of the battery 1 as an electrical storage element by 1st Embodiment of this invention is demonstrated. 2 and 3 illustrate an inner peripheral side jig 20 described later, and FIG. 3 illustrates an outer surface side jig 21 described later. However, the inner peripheral side jig 20 and the outer surface side jig 21 are illustrated. 21 is used only when the battery 1 is manufactured, and is removed in a completed state.

本発明の第１実施形態による電池（たとえば、リチウムイオン電池）１は、図１に示すように、発電要素２を備えている。発電要素２は、図２に示すように、正極３と負極４との間にセパレータ５を介在させて、正極３と負極４とセパレータ５とを巻回軸線７００を中心に巻回することにより形成されている。また、発電要素２は、図１に示すように、ケース６の内部に収納されている。また、図示しない電解質と発電要素２とがケース６の内部に収納された状態でケース６の開口部を塞ぐように、電池蓋７がケース６に取り付けられている。また、正極３は把持部材８を介して正極端子１１と電気的に接続され、負極４は把持部材９を介して負極端子１０と電気的に接続されている。なお、図１では、正極３、負極４及びセパレータ５を巻回した状態を簡略化して発電要素２を示している。また、正極３及び負極４は、本発明の「電極」の一例である。   A battery (for example, a lithium ion battery) 1 according to the first embodiment of the present invention includes a power generation element 2 as shown in FIG. As shown in FIG. 2, the power generation element 2 has a separator 5 interposed between a positive electrode 3 and a negative electrode 4, and the positive electrode 3, the negative electrode 4, and the separator 5 are wound around a winding axis 700. Is formed. Further, the power generation element 2 is housed in the case 6 as shown in FIG. In addition, a battery lid 7 is attached to the case 6 so as to close the opening of the case 6 in a state where an electrolyte (not shown) and the power generation element 2 are housed inside the case 6. Further, the positive electrode 3 is electrically connected to the positive electrode terminal 11 via the gripping member 8, and the negative electrode 4 is electrically connected to the negative electrode terminal 10 via the gripping member 9. In FIG. 1, the power generation element 2 is shown by simplifying the state in which the positive electrode 3, the negative electrode 4, and the separator 5 are wound. The positive electrode 3 and the negative electrode 4 are examples of the “electrode” in the present invention.

発電要素２は、図３及び図７に示すように、巻回軸線７００が延びる方向（Ｘ方向）から見て、略長円形状を有している。   As illustrated in FIGS. 3 and 7, the power generation element 2 has a substantially oval shape when viewed from the direction in which the winding axis 700 extends (X direction).

正極３は、図２に示すように、アルミニウム箔などからなる正極集電体３１と、正極集電体３１の両面に正極活物質を含有する正極合剤が塗布された正極合剤層３２とを含む。また、正極活物質は、特に限定されるものではなく、種々の正極活物質を用いることが可能である。なお、正極集電体３１は、本発明の「電極集電体」の一例である。また、正極合剤層３２は、本発明の「合剤層」の一例である。   As shown in FIG. 2, the positive electrode 3 includes a positive electrode current collector 31 made of an aluminum foil or the like, and a positive electrode mixture layer 32 in which a positive electrode mixture containing a positive electrode active material is applied to both surfaces of the positive electrode current collector 31. including. The positive electrode active material is not particularly limited, and various positive electrode active materials can be used. The positive electrode current collector 31 is an example of the “electrode current collector” in the present invention. The positive electrode mixture layer 32 is an example of the “mixture layer” in the present invention.

また、正極３は、Ｘ２方向側の正極合剤層３２が形成されている正極合剤層形成部Ｒ１と、Ｘ１方向側の正極合剤層３２が形成されていない正極合剤層非形成部Ｒ２とを含んでいる。また、正極合剤層非形成部Ｒ２は、正極合剤層形成部Ｒ１のＸ１方向側の端部からＸ１方向側に突出している。また、正極合剤層非形成部Ｒ２は、図２及び図３に示すように、正極合剤層非形成部Ｒ２をフォーミングする際に曲折されるＸ１方向側の曲折部３１１と、把持部材８によって把持されるＸ１方向側の把持部３１２とを含んでいる。また、正極合剤層非形成部Ｒ２は、曲折部３１１で折曲され、把持部３１２で束ねられている。また、把持部３１２は、図２に示すように、束ねられた（フォーミングされた）状態においてＸ方向に略平行である。なお、正極合剤層形成部Ｒ１は、本発明の「合剤層形成部」の一例である。また、正極合剤層非形成部Ｒ２は、本発明の「合剤層非形成部」の一例である。   The positive electrode 3 includes a positive electrode mixture layer forming portion R1 in which the positive electrode mixture layer 32 on the X2 direction side is formed, and a positive electrode mixture layer non-forming portion in which the positive electrode mixture layer 32 on the X1 direction side is not formed. R2 is included. Further, the positive electrode mixture layer non-forming portion R2 protrudes from the end portion on the X1 direction side of the positive electrode mixture layer forming portion R1 to the X1 direction side. Further, as shown in FIGS. 2 and 3, the positive electrode mixture layer non-forming portion R2 includes a bent portion 311 on the X1 direction side that is bent when the positive electrode mixture layer non-forming portion R2 is formed, and the gripping member 8. And a grip portion 312 on the X1 direction side. Further, the positive electrode mixture layer non-forming portion R <b> 2 is bent by the bent portion 311 and bundled by the grip portion 312. Further, as shown in FIG. 2, the grip portion 312 is substantially parallel to the X direction in a bundled (formed) state. The positive electrode mixture layer forming portion R1 is an example of the “mixture layer forming portion” in the present invention. Further, the positive electrode mixture layer non-forming portion R2 is an example of the “mixture layer non-forming portion” in the present invention.

負極４は、銅箔からなる負極集電体４１と、負極集電体４１の両面に負極活物質を含有する負極合剤が塗布された負極合剤層４２とを含む。また、負極活物質は、特に限定されるものではなく、種々の負極活物質を用いることが可能である。なお、負極集電体４１は、本発明の「電極集電体」の一例である。また、負極合剤層４２は、本発明の「合剤層」の一例である。   The negative electrode 4 includes a negative electrode current collector 41 made of a copper foil, and a negative electrode mixture layer 42 in which a negative electrode mixture containing a negative electrode active material is applied to both surfaces of the negative electrode current collector 41. The negative electrode active material is not particularly limited, and various negative electrode active materials can be used. The negative electrode current collector 41 is an example of the “electrode current collector” in the present invention. The negative electrode mixture layer 42 is an example of the “mixture layer” in the present invention.

また、負極４は、Ｘ１方向側の負極合剤層４２が形成されている負極合剤層形成部Ｒ３と、Ｘ２方向側の負極合剤層４２が形成されていない負極合剤層非形成部Ｒ４とを含んでいる。また、負極合剤層非形成部Ｒ４は、負極合剤層形成部Ｒ３のＸ２方向側の端部からＸ２方向側に突出している。即ち、正極合剤層非形成部Ｒ２と負極合剤層非形成部Ｒ４とは、互いに、Ｘ方向において反対方向に延びるように形成されている。また、負極合剤層非形成部Ｒ４は、図２及び図３に示すように、負極合剤層非形成部Ｒ４をフォーミングする際に曲折されるＸ２方向側の曲折部４１１と把持部材９によって把持されるＸ２方向側の把持部４１２とを含んでいる。また、負極合剤層非形成部Ｒ４は、曲折部４１１で折曲され、把持部４１２で束ねられている。また、把持部４１２は、図２に示すように、束ねられた（フォーミングされた）状態においてＸ方向に略平行である。なお、負極合剤層形成部Ｒ３は、本発明の「合剤層形成部」の一例である。また、負極合剤層非形成部Ｒ４は、本発明の「合剤層非形成部」の一例である。   The negative electrode 4 includes a negative electrode mixture layer forming portion R3 in which the negative electrode mixture layer 42 on the X1 direction side is formed, and a negative electrode mixture layer non-forming portion in which the negative electrode mixture layer 42 on the X2 direction side is not formed. R4 is included. Further, the negative electrode mixture layer non-forming part R4 protrudes from the end of the negative electrode mixture layer forming part R3 on the X2 direction side in the X2 direction side. That is, the positive electrode mixture layer non-forming portion R2 and the negative electrode mixture layer non-forming portion R4 are formed to extend in opposite directions in the X direction. Further, as shown in FIGS. 2 and 3, the negative electrode mixture layer non-forming portion R4 is formed by a bent portion 411 on the X2 direction side and a gripping member 9 that are bent when the negative electrode mixture layer non-forming portion R4 is formed. And a grip portion 412 on the X2 direction side to be gripped. Further, the negative electrode mixture layer non-forming portion R4 is bent by the bent portion 411 and bundled by the grip portion 412. Further, as shown in FIG. 2, the grip portion 412 is substantially parallel to the X direction in a bundled (formed) state. The negative electrode mixture layer forming portion R3 is an example of the “mixture layer forming portion” in the present invention. The negative electrode mixture layer non-forming portion R4 is an example of the “mixture layer non-forming portion” in the present invention.

また、Ｘ方向において、負極合剤層４２の幅（負極合剤層形成部Ｒ３の幅）は、正極合剤層３２の幅（正極合剤層形成部Ｒ１の幅）よりも大きい。また、負極合剤層４２のＸ方向の両端部は、正極合剤層３２のＸ方向の両端部よりも外側に延びるように構成されている。   In the X direction, the width of the negative electrode mixture layer 42 (width of the negative electrode mixture layer forming portion R3) is larger than the width of the positive electrode mixture layer 32 (width of the positive electrode mixture layer forming portion R1). Further, both end portions in the X direction of the negative electrode mixture layer 42 are configured to extend outward from both end portions in the X direction of the positive electrode mixture layer 32.

セパレータ５は、正極３と負極４との間に配置されている。また、Ｘ方向において、セパレータ５の幅は、正極合剤層３２の幅（正極合剤層形成部Ｒ１の幅）及び負極合剤層４２の幅（負極合剤層形成部Ｒ３の幅）よりも大きい。また、セパレータ５のＸ方向の両端部は、正極合剤層３２（正極合剤層形成部Ｒ１の幅）及び負極合剤層４２（負極合剤層形成部Ｒ３の幅）のＸ方向のそれぞれの両端部よりも外側に延びるように構成されている。セパレータ５は、たとえば、ポリエチレンなどの多孔質絶縁材料により形成されている。   The separator 5 is disposed between the positive electrode 3 and the negative electrode 4. In the X direction, the width of the separator 5 is greater than the width of the positive electrode mixture layer 32 (the width of the positive electrode mixture layer forming portion R1) and the width of the negative electrode mixture layer 42 (the width of the negative electrode mixture layer forming portion R3). Is also big. Further, both end portions in the X direction of the separator 5 are respectively in the X direction of the positive electrode mixture layer 32 (the width of the positive electrode mixture layer forming portion R1) and the negative electrode mixture layer 42 (the width of the negative electrode mixture layer forming portion R3). It is comprised so that it may extend outside from the both ends. The separator 5 is made of, for example, a porous insulating material such as polyethylene.

次に、図１〜図７を参照して、本発明の第１実施形態による電池１の製造方法（組立方法）について説明する。まず、第１実施形態による電池１の製造時に使用される内周側治具２０及び外面側治具２１を説明し、その後、内周側治具２０及び外面側治具２１を用いた電池１の製造方法について説明する。なお、図２及び図６においては、説明の便宜上、外面側治具２１を省略して図示している。   Next, with reference to FIGS. 1-7, the manufacturing method (assembly method) of the battery 1 by 1st Embodiment of this invention is demonstrated. First, the inner peripheral side jig 20 and the outer surface side jig 21 used when manufacturing the battery 1 according to the first embodiment will be described, and then the battery 1 using the inner peripheral side jig 20 and the outer surface side jig 21. The manufacturing method will be described. 2 and 6, the outer surface side jig 21 is omitted for convenience of explanation.

ここで、第１実施形態では、一対の内周側治具２０（図２及び図４参照）及び一対の外周側治具２１（図３及び図５参照）を配置した発電要素２を減圧環境下に置くことによって、正極集電体３１の正極合剤層非形成部Ｒ２及び負極集電体４１の負極合剤層非形成部Ｒ４がフォーミングされる（正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４の形状が整えられる）。なお、内周側治具２０は、本発明の「合剤層非形成部形成治具」の一例である。   Here, in 1st Embodiment, the electric power generation element 2 which has arrange | positioned a pair of inner peripheral side jig | tool 20 (refer FIG.2 and FIG.4) and a pair of outer peripheral side jig | tool 21 (refer FIG.3 and FIG.5) is reduced pressure environment. By placing it below, the positive electrode mixture layer non-forming part R2 of the positive electrode current collector 31 and the negative electrode mixture layer non-forming part R4 of the negative electrode current collector 41 are formed (the positive electrode mixture layer non-forming part R2 and the negative electrode). The shape of the mixture layer non-formed part R4 is adjusted). The inner periphery side jig 20 is an example of the “mixture layer non-formed part forming jig” in the present invention.

また、第１実施形態では、正極集電体３１の正極合剤層非形成部Ｒ２（負極集電体４１の負極合剤層非形成部Ｒ４）をフォーミングする際に用いられる内周側治具２０は、図７に示すように、発電要素２に嵌め込まれた状態でＸ方向側から見て、Ｚ方向に延びる略長円形状を有している。また、内周側治具２０は、Ｘ方向側から見て、発電要素２の内周部２ａに略対応するように構成されている。また、内周側治具２０は、Ｘ方向側から見て、発電要素２（正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４）の内周部２ａの内周と略同じ長さの外周を有している。これにより、嵌め込まれた内周側治具２０の形状に対応するように発電要素２の正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）が、フォーミングされる。また、内周側治具２０は、図６に示すように、Ｘ方向に垂直な方向から見て、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）と略同じＸ方向の幅、又は、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）と比較して大きいＸ方向の幅を有している。また、内周側治具２０は、Ｘ方向における正極合剤層形成部Ｒ１（負極合剤層形成部Ｒ３）側の先端部分が正極合剤層形成部Ｒ１（負極合剤層形成部Ｒ３）に侵入しないように構成されている。また、内周側治具２０は、Ｘ方向に垂直な方向から見て、正極合剤層非形成部Ｒ２の把持部３１２（負極合剤層非形成部Ｒ４の把持部４１２）に対応する（重なる）部分２０１が、Ｘ方向に略平行になるように形成されている。また、正極合剤層非形成部Ｒ２の曲折部３１１（負極合剤層非形成部Ｒ４の曲折部４１１）に対応する（重なる）部分２０２は、発電要素２の中心方向（正極合剤層形成部Ｒ１側及び負極合剤層形成部Ｒ３側）に向けて先細りになるように（テーパ状に）形成されている。また、内周側治具２０を形成する材料としては、発電要素２を押圧して正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする際に、略変形しないような物性を有する材料であれば、特に制限なく用いることができる。例えば、内周側治具２０は、ポリエチレンなどの樹脂により形成することができる。   Moreover, in 1st Embodiment, the inner peripheral side jig | tool used when forming the positive mix layer non-formation part R2 of the positive electrode collector 31 (negative mix layer non-formation part R4 of the negative electrode collector 41) is formed. As shown in FIG. 7, 20 has a substantially oval shape extending in the Z direction when viewed from the X direction side when fitted into the power generation element 2. Moreover, the inner peripheral side jig | tool 20 is comprised so that it may correspond to the inner peripheral part 2a of the electric power generation element 2 seeing from the X direction side. Moreover, the inner periphery side jig | tool 20 is substantially the same as the inner periphery of the inner peripheral part 2a of the electric power generation element 2 (positive electrode mixture layer non-formation part R2 and negative electrode mixture layer non-formation part R4) seeing from the X direction side. It has a length perimeter. Thereby, the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) of the power generation element 2 is formed so as to correspond to the shape of the fitted inner peripheral side jig 20. Further, as shown in FIG. 6, the inner periphery side jig 20 is substantially the same in the X direction as the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming part R4) when viewed from the direction perpendicular to the X direction. Or a width in the X direction larger than that of the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming part R4). Further, the inner periphery side jig 20 has a positive electrode mixture layer forming portion R1 (negative electrode mixture layer forming portion R3) at the tip portion on the positive electrode mixture layer forming portion R1 (negative electrode mixture layer forming portion R3) side in the X direction. It is configured not to invade. Further, the inner circumferential side jig 20 corresponds to the grip portion 312 of the positive electrode mixture layer non-forming portion R2 (the grip portion 412 of the negative electrode mixture layer non-forming portion R4) when viewed from the direction perpendicular to the X direction ( The overlapping portion 201 is formed so as to be substantially parallel to the X direction. Further, a portion 202 corresponding to (overlapping) the bent portion 311 of the positive electrode mixture layer non-forming portion R2 (the bent portion 411 of the negative electrode mixture layer non-forming portion R4) is the center direction of the power generation element 2 (positive electrode mixture layer formation). It is formed to be tapered (tapered) toward the part R1 side and the negative electrode mixture layer forming part R3 side). In addition, as a material for forming the inner periphery side jig 20, when the power generation element 2 is pressed to form the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4), the material is not substantially deformed. Any material that has various physical properties can be used without particular limitation. For example, the inner circumference side jig 20 can be formed of a resin such as polyethylene.

また、第１実施形態では、正極集電体３１の正極合剤層非形成部Ｒ２（負極集電体４１の負極合剤層非形成部Ｒ４）をフォーミングする際に用いられる外周側治具２１は、図５に示すように、概略的には、樋形状を有している。具体的には、外周側治具２１は、図７に示すように、Ｘ方向側から見て、内周面２１１が発電要素２の外周部２ｂのうち曲面形状を有する（所定のＲを有する）部分（以下、曲面部２ｃという）に略対応するように略半円形状に形成されている。また、外周側治具２１は、Ｘ方向と垂直な方向から見て、正極合剤層非形成部Ｒ２の把持部３１２（負極合剤層非形成部Ｒ４の把持部４１２）に対応する幅を有している。また、外周側治具２１を形成する材料としては、発電要素２を押圧して正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする際に、略変形しないような物性を有する材料であれば、特に制限なく用いることができる。例えば、外周側治具２１は、ポリエチレンなどの樹脂により形成することができる。   Moreover, in 1st Embodiment, the outer periphery side jig | tool 21 used when forming the positive mix layer non-formation part R2 of the positive electrode collector 31 (negative mix layer non-formation part R4 of the negative electrode collector 41) is formed. As shown in FIG. 5, it generally has a bowl shape. Specifically, as shown in FIG. 7, the outer peripheral side jig 21 has an inner peripheral surface 211 having a curved surface shape in the outer peripheral portion 2 b of the power generation element 2 (having a predetermined R) when viewed from the X direction side. ) Portion (hereinafter, referred to as a curved surface portion 2c). The outer jig 21 has a width corresponding to the grip portion 312 of the positive electrode mixture layer non-forming portion R2 (the grip portion 412 of the negative electrode mixture layer non-forming portion R4) when viewed from the direction perpendicular to the X direction. Have. Further, as a material for forming the outer peripheral side jig 21, when the power generating element 2 is pressed to form the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4), the material is not substantially deformed. Any material having physical properties can be used without particular limitation. For example, the outer peripheral side jig 21 can be formed of a resin such as polyethylene.

以下に、第１実施形態による上記した内周側治具２０及び外面側治具２１を用いた電池１の製造方法を具体的に説明する。   Below, the manufacturing method of the battery 1 using the above-mentioned inner periphery side jig | tool 20 and the outer surface side jig | tool 21 by 1st Embodiment is demonstrated concretely.

まず、正極３と負極４との間にセパレータ５を介在させて、正極３と負極４とセパレータ５とを巻回軸線７００を中心に巻回することにより巻回軸線７００が延びる方向（Ｘ方向）から見て略長円形状の発電要素２を形成する。この状態では、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）は、束ねられていない。   First, the separator 5 is interposed between the positive electrode 3 and the negative electrode 4, and the positive electrode 3, the negative electrode 4, and the separator 5 are wound around the winding axis 700 to extend the winding axis 700 (X direction). ), The power generation element 2 having a substantially oval shape is formed. In this state, the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) is not bundled.

次に、図２及び図３に示すように、Ｘ１方向側及びＸ２方向側から、それぞれ、巻回された発電要素２の正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４に対応する位置に内周側治具２０を挿入する。具体的には、内周側治具２０を発電要素２の内周部２ａ側に配置する。また、発電要素２の巻回軸線７００が延びる方向（Ｘ方向）から見て、内周側治具２０を発電要素２における正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）の内周部２ａの略全体と接触するように発電要素２に内周側治具２０を嵌め込む。この際、内周側治具２０は樹脂製であることにより正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を損傷させるおそれは低い。また、クシ歯のように発電要素２の層間に及び外周部２ｂに配置する必要がないので、製造工程を簡略化することが可能である。   Next, as shown in FIGS. 2 and 3, from the X1 direction side and the X2 direction side, respectively, to the positive electrode mixture layer non-forming part R2 and the negative electrode mixture layer non-forming part R4 of the wound power generation element 2 The inner periphery side jig | tool 20 is inserted in the corresponding position. Specifically, the inner peripheral side jig 20 is disposed on the inner peripheral part 2 a side of the power generation element 2. In addition, when viewed from the direction (X direction) in which the winding axis 700 of the power generation element 2 extends, the inner peripheral side jig 20 is connected to the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming part R4) in the power generation element 2. The inner peripheral side jig 20 is fitted into the power generation element 2 so as to be in contact with substantially the entire inner peripheral portion 2a. At this time, since the inner peripheral side jig 20 is made of resin, there is a low possibility that the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) is damaged. Moreover, since it is not necessary to arrange | position between the layers of the electric power generation element 2 and the outer peripheral part 2b like a comb tooth, it is possible to simplify a manufacturing process.

次に、内周側治具２０とは異なる２つの外周側治具２１を巻回された発電要素２の正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４に対応する位置に配置する（取り付ける）。具体的には、外周側治具２１の内周面２１１が発電要素２の曲面部２ｃに対応する位置に配置されるように取り付ける。この際、外周側治具２１は樹脂製であることにより正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を損傷させるおそれは低い。   Next, at positions corresponding to the positive electrode mixture layer non-forming part R2 and the negative electrode mixture layer non-forming part R4 of the power generation element 2 wound with two outer peripheral jigs 21 different from the inner peripheral jig 20 Place (attach). Specifically, the inner peripheral surface 211 of the outer peripheral side jig 21 is attached so as to be disposed at a position corresponding to the curved surface portion 2 c of the power generation element 2. At this time, since the outer peripheral side jig 21 is made of resin, there is a low possibility that the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) will be damaged.

次に、内周側治具２０を内周部２ａに配置するとともに、外周側治具２１を曲面部２ｃに配置した状態で、発電要素２を減圧環境下に置く。具体的には、発電要素２を図示しない袋などに入れて密封した状態で減圧する。すなわち、発電要素２を１気圧未満の環境下に置く。なお、発電要素２を真空（０気圧）に近い環境下に置くことが好ましい。これにより、発電要素２は袋などを介して外側から大気圧がかかることにより、図６及び図７に示す状態の発電要素２が外周部２ｂから内周部２ａに向かって（Ｙ方向側及びＺ方向側に）押圧される。この際、曲折部３１１（４１１）も形成される。そして、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）が、図２及び図３に示すように、密着した状態で束ねられるようにフォーミングされる。また、この際、正極合剤層形成部Ｒ１及び負極合剤層形成部Ｒ３もセパレータ５を介して密着される。   Next, while the inner peripheral side jig 20 is disposed on the inner peripheral part 2a and the outer peripheral side jig 21 is disposed on the curved surface part 2c, the power generating element 2 is placed in a reduced pressure environment. Specifically, the pressure is reduced while the power generation element 2 is sealed in a bag (not shown). That is, the power generation element 2 is placed in an environment of less than 1 atmosphere. Note that the power generation element 2 is preferably placed in an environment close to a vacuum (0 atm). Thereby, the atmospheric pressure is applied to the power generation element 2 from the outside through a bag or the like, so that the power generation element 2 in the state shown in FIGS. 6 and 7 moves from the outer peripheral portion 2b toward the inner peripheral portion 2a (on the Y direction side and Pressed to the Z direction side). At this time, a bent portion 311 (411) is also formed. Then, the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) is formed so as to be bundled in close contact as shown in FIGS. At this time, the positive electrode mixture layer forming portion R1 and the negative electrode mixture layer forming portion R3 are also closely attached via the separator 5.

また、本発明における発電要素２を入れる袋としては、発電要素２を収納して減圧環境下に置かれた際に、大気圧に押圧されることにより破損しないものであれば、特に制限されない。発電要素２を入れる袋としては、例えば、ポリエチレンなどの樹脂や金属ラミネートフィルムなどにより形成される袋を使用することができる。   In addition, the bag for storing the power generation element 2 in the present invention is not particularly limited as long as it is not damaged by being pressed by atmospheric pressure when the power generation element 2 is stored and placed in a reduced pressure environment. As the bag for storing the power generation element 2, for example, a bag formed of a resin such as polyethylene or a metal laminate film can be used.

次に、フォーミングされた発電要素２から内周側治具２０及び外周側治具２１を取り外す。   Next, the inner peripheral side jig 20 and the outer peripheral side jig 21 are removed from the formed power generation element 2.

次に、図１に示すように、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングした発電要素２を把持部材８（９）に接続した後、図示しない電解質とともに、ケース６の内部に収納する。その後、レーザ溶接により電池蓋７をケース６に取り付ける。このようにして、電池１が形成される。   Next, as shown in FIG. 1, after the power generating element 2 formed with the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) is connected to the gripping member 8 (9), the electrolyte is not shown. And housed inside the case 6. Thereafter, the battery lid 7 is attached to the case 6 by laser welding. In this way, the battery 1 is formed.

第１実施形態では、以下のような効果を得ることができる。   In the first embodiment, the following effects can be obtained.

第１実施形態では、上記のように、内周側治具２０を発電要素２の正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）における内周部２ａに配置した状態で、発電要素２を減圧環境下に置くことによって、発電要素２の外周部２ｂから内周部２ａに向かって正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を押圧する工程を設ける。これにより、金属製のクシ歯及び加圧部材などにより正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を挟み込んで正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする場合と異なり、空気の圧力により正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングすることができるので、フォーミングの際に正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）に掛かる負荷を低減することができる。その結果、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）が損傷するのを抑制することができる。   In 1st Embodiment, in the state which has arrange | positioned the inner peripheral side jig | tool 20 in the inner peripheral part 2a in the positive mix layer non-formation part R2 (negative electrode mix layer non-formation part R4) of the electric power generation element 2 as mentioned above. The step of pressing the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) from the outer peripheral part 2b of the power generating element 2 toward the inner peripheral part 2a by placing the power generating element 2 in a reduced pressure environment. Is provided. As a result, the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming part R4) is sandwiched between metal comb teeth and a pressure member, and the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming) Unlike forming the portion R4), the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) can be formed by air pressure, so that the positive electrode mixture layer is not formed at the time of forming. The load applied to the portion R2 (negative electrode mixture layer non-forming portion R4) can be reduced. As a result, damage to the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) can be suppressed.

また、第１実施形態では、発電要素２は、巻回軸線７００が延びる方向から見て、略長円形状であり、内周側治具２０を発電要素２の正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）における内周部２ａに配置し、かつ、外面側治具２１を発電要素２の正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）における外周部２ｂの曲面部２ｃに配置した状態で、発電要素２の外周部２ｂから内周部２ａに向かって正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を押圧する工程を設ける。これにより、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする際に形状が歪みやすい発電要素２（正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４））の曲面部２ｃに外面側治具２１を配置した状態で正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングすることができるので、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を損傷するのを抑制しながら、精度よく正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングすることができる。また、減圧することによって、圧力が正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）全体に均等に加わるので、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を均一にフォーミングすることができる。   In the first embodiment, the power generation element 2 has a substantially oval shape when viewed from the direction in which the winding axis 700 extends, and the inner peripheral side jig 20 is connected to the positive electrode mixture layer non-forming portion R2 of the power generation element 2. It arrange | positions in the inner peripheral part 2a in (negative electrode mixture layer non-formation part R4), and the outer surface side jig | tool 21 in the positive electrode mixture layer non-formation part R2 (negative electrode mixture layer non-formation part R4) of the electric power generation element 2 A step of pressing the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) from the outer peripheral portion 2b of the power generation element 2 toward the inner peripheral portion 2a in a state where the electric power generating element 2 is arranged on the curved surface portion 2c of the outer peripheral portion 2b. Is provided. Thereby, when forming positive electrode mixture layer non-formation part R2 (negative electrode mixture layer non-formation part R4), the electric power generation element 2 (positive electrode mixture layer non-formation part R2 (negative electrode mixture layer non-formation part) whose shape is easily distorted Since the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming part R4) can be formed in a state where the outer surface side jig 21 is arranged on the curved surface part 2c of R4)), the positive electrode mixture layer is not formed. The positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) can be accurately formed while suppressing damage to the part R2 (negative electrode mixture layer non-formed part R4). Further, by reducing the pressure, the pressure is evenly applied to the entire positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4), so the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion) R4) can be uniformly formed.

また、第１実施形態では、発電要素２の巻回軸線７００が延びる方向から見て、内周側治具２０を発電要素２の正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）における内周部２ａの略全体と接触するように発電要素２の内周部２ａに嵌め込んだ状態で、発電要素２の外周部２ｂから内周部２ａに向かって正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を押圧する工程を設ける。これにより、発電要素２の巻回軸線７００が延びる方向から見て、発電要素２の正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）の内周部２ａの略全体を均一にフォーミングすることができる。   Moreover, in 1st Embodiment, seeing from the direction where the winding axis 700 of the electric power generation element 2 is extended, the inner periphery side jig | tool 20 is positive electrode mixture layer non-formation part R2 (negative electrode mixture layer non-formation part of the electric power generation element 2). In the state of being fitted into the inner peripheral portion 2a of the power generating element 2 so as to be in contact with substantially the entire inner peripheral portion 2a in R4), the positive electrode mixture layer is not applied from the outer peripheral portion 2b of the power generating element 2 toward the inner peripheral portion 2a. A step of pressing the forming portion R2 (negative electrode mixture layer non-forming portion R4) is provided. Thereby, as viewed from the direction in which the winding axis 700 of the power generation element 2 extends, substantially the entire inner peripheral portion 2a of the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) of the power generation element 2 is uniform. Can be formed.

（第２実施形態）
次に、図１〜図９を参照して、本発明の第２実施形態による電池１００の構成について説明する。なお、電池１００は、本発明の「蓄電素子」の一例である。 (Second Embodiment)
Next, with reference to FIGS. 1-9, the structure of the battery 100 by 2nd Embodiment of this invention is demonstrated. The battery 100 is an example of the “storage element” in the present invention.

この第２実施形態では、発電要素２を減圧環境下に置くことによって、正極集電体３１の正極合剤層非形成部Ｒ２及び負極集電体４１の負極合剤層非形成部Ｒ４がフォーミングされる第１実施形態と異なり、押圧部材１２０を用いて正極集電体３１の正極合剤層非形成部Ｒ２及び負極集電体４１の負極合剤層非形成部Ｒ４がフォーミングされる電池１００の製造方法について説明する。なお、押圧部材１２０は、本発明の「柔らかい部材」の一例である。また、第２実施形態において、第１実施形態と同様の構成については、同じ符号を用い、説明を省略する。   In the second embodiment, the positive electrode mixture layer non-forming portion R2 of the positive electrode current collector 31 and the negative electrode mixture layer non-forming portion R4 of the negative electrode current collector 41 are formed by placing the power generation element 2 in a reduced pressure environment. Unlike the first embodiment, the battery 100 in which the positive electrode mixture layer non-forming portion R2 of the positive electrode current collector 31 and the negative electrode mixture layer non-forming portion R4 of the negative electrode current collector 41 are formed using the pressing member 120. The manufacturing method will be described. The pressing member 120 is an example of the “soft member” in the present invention. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

図１〜図９を参照して、第２実施形態による電池１００の製造方法について説明する。   With reference to FIGS. 1-9, the manufacturing method of the battery 100 by 2nd Embodiment is demonstrated.

ここで、第２実施形態では、図８及び図９に示すように、内周側治具２０（図４参照）及び外周側治具２１（図５参照）を配置した発電要素２を一対の（２つの）押圧部材１２０より挟み込むように押圧することによって、正極集電体３１の正極合剤層非形成部Ｒ２及び負極集電体４１の負極合剤層非形成部Ｒ４がフォーミングされる（正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４の形状が整えられる）。   Here, in 2nd Embodiment, as shown in FIG.8 and FIG.9, the electric power generation element 2 which has arrange | positioned the inner peripheral side jig | tool 20 (refer FIG. 4) and the outer peripheral side jig | tool 21 (refer FIG. 5) is made into a pair. By pressing between the (two) pressing members 120, the positive electrode mixture layer non-forming portion R2 of the positive electrode current collector 31 and the negative electrode mixture layer non-forming portion R4 of the negative electrode current collector 41 are formed ( The shapes of the positive electrode mixture layer non-forming part R2 and the negative electrode mixture layer non-forming part R4 are adjusted).

また、第２実施形態では、正極集電体３１の正極合剤層非形成部Ｒ２（負極集電体４１の負極合剤層非形成部Ｒ４）をフォーミングする際に用いられる押圧部材１２０は、図８に示すように、Ｘ方向側から見て、略長方形形状を有している。また、押圧部材１２０は、Ｚ方向において、発電要素２の長さよりも大きい長さを有している。また、押圧部材１２０は、図９に示すように、巻回軸線７００が延びる方向（Ｘ方向）において、発電要素２の長手方向（Ｘ方向）の長さよりも大きい長さを有している。これにより、一対の押圧部材１２０によって、発電要素２の全体を外周部２ｂから内周部２ａに向けて押圧することが可能である。   In the second embodiment, the pressing member 120 used when forming the positive electrode mixture layer non-forming part R2 of the positive electrode current collector 31 (negative electrode mixture layer non-forming part R4 of the negative electrode current collector 41) is: As shown in FIG. 8, it has a substantially rectangular shape when viewed from the X direction side. Further, the pressing member 120 has a length larger than the length of the power generation element 2 in the Z direction. Further, as shown in FIG. 9, the pressing member 120 has a length larger than the length in the longitudinal direction (X direction) of the power generating element 2 in the direction (X direction) in which the winding axis 700 extends. Thereby, it is possible to press the whole power generation element 2 from the outer peripheral portion 2b toward the inner peripheral portion 2a by the pair of pressing members 120.

また、押圧部材１２０は、正極集電体３１および負極集電体４１よりも柔らかい材料により形成されている。言い換えると、押圧部材１２０は、アルミニウムや銅などの金属よりも柔らかい材料により形成されている。詳細には、押圧部材１２０は、発電要素２（正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４）を押圧して正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする際に、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を損傷させない材料により形成されている。   The pressing member 120 is made of a material softer than the positive electrode current collector 31 and the negative electrode current collector 41. In other words, the pressing member 120 is made of a material softer than a metal such as aluminum or copper. Specifically, the pressing member 120 presses the power generating element 2 (the positive electrode mixture layer non-forming part R2 and the negative electrode mixture layer non-forming part R4) to press the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming). When forming the portion R4), it is formed of a material that does not damage the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4).

たとえば、押圧部材１２０は、上記したような柔らかさのオイルが封入されたオイルバック、水が封入されたウォーターバックや気体（空気）が封入されたエアバックにより構成することができる。また、押圧部材１２０は、上記したような柔らかさのゴム（たとえば、シリコンゴム）やゲル状の物質などにより構成してもよい。また、押圧部材１２０は、合成樹脂（たとえば、ポリウレタン）を発泡成形して作られるスポンジにより構成してもよい。   For example, the pressing member 120 can be configured by an oil bag in which soft oil as described above is sealed, a water bag in which water is sealed, or an air bag in which gas (air) is sealed. In addition, the pressing member 120 may be made of soft rubber (for example, silicon rubber) or a gel-like substance as described above. Further, the pressing member 120 may be constituted by a sponge made by foaming a synthetic resin (for example, polyurethane).

また、押圧部材１２０は、発電要素２（正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４）を押圧した際に、束ねられた正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）の外周部２ｂと外面側治具２１の内周面２１１との隙間５０（図３参照）に入り込むように変形可能なように構成されていることが好ましい。   Further, when the pressing member 120 presses the power generation element 2 (the positive electrode mixture layer non-forming portion R2 and the negative electrode mixture layer non forming portion R4), the positive electrode mixture layer non-forming portion R2 (negative electrode mixture) bundled is pressed. It is preferable to be configured to be deformable so as to enter the gap 50 (see FIG. 3) between the outer peripheral portion 2b of the layer non-forming portion R4) and the inner peripheral surface 211 of the outer surface side jig 21.

以下、第２実施形態による電池１００の製造方法を具体的に説明する。   Hereinafter, a method for manufacturing the battery 100 according to the second embodiment will be described in detail.

まず、正極３と負極４との間にセパレータ５を介在させて、正極３と負極４とセパレータ５とを巻回軸線７００を中心に巻回することにより発電要素２を形成する。この状態では、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）は、束ねられていない。   First, the power generation element 2 is formed by interposing the separator 5 between the positive electrode 3 and the negative electrode 4 and winding the positive electrode 3, the negative electrode 4, and the separator 5 around the winding axis 700. In this state, the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) is not bundled.

次に、図６及び図７に示すように、上記第１実施形態と同様に、Ｘ１方向側及びＸ２方向側から、それぞれ、巻回された発電要素２の正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４に対応する位置に内周側治具２０を挿入する。次に、内周側治具２０とは異なる２つの外周側治具２１を巻回された発電要素２の正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４に対応する位置に配置する（取り付ける）。   Next, as shown in FIGS. 6 and 7, as in the first embodiment, from the X1 direction side and the X2 direction side, respectively, the positive electrode mixture layer non-forming portion R2 of the wound power generation element 2 and The inner periphery side jig | tool 20 is inserted in the position corresponding to the negative mix layer non-formation part R4. Next, at positions corresponding to the positive electrode mixture layer non-forming part R2 and the negative electrode mixture layer non-forming part R4 of the power generation element 2 wound with two outer peripheral jigs 21 different from the inner peripheral jig 20 Place (attach).

次に、図８及び図９に示すように、内周側治具２０が内周部２ａに配置されるとともに外周側治具２１が曲面部２ｃに配置される発電要素２を、柔らかい押圧部材１２０によって中心（巻回軸線７００）に向けてＹ方向に押圧する。これにより、図８及び図９に示すように、発電要素２が外周部２ｂから内周部２ａに向かって（Ｙ方向側に）押圧される。そして、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）が、図２及び図３に示すように、密着した状態で束ねられるようにフォーミングされる。   Next, as shown in FIGS. 8 and 9, the power generation element 2 in which the inner peripheral side jig 20 is disposed on the inner peripheral part 2a and the outer peripheral side jig 21 is disposed on the curved surface part 2c is replaced with a soft pressing member. 120 is pressed in the Y direction toward the center (winding axis 700). Thereby, as shown in FIG.8 and FIG.9, the electric power generation element 2 is pressed toward the inner peripheral part 2a from the outer peripheral part 2b (to the Y direction side). Then, the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) is formed so as to be bundled in close contact as shown in FIGS.

次に、押圧部材１２０による押圧を解除して、フォーミングされた発電要素２から内周側治具２０及び外周側治具２１を取り外す。   Next, the pressing by the pressing member 120 is released, and the inner peripheral side jig 20 and the outer peripheral side jig 21 are removed from the formed power generation element 2.

次に、上記第１実施形態と同様に、図１に示すように、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングした発電要素２を、ケース６の内部に収納等することによって、電池１００が形成される。   Next, as in the first embodiment, as shown in FIG. 1, the power generation element 2 formed with the positive electrode mixture layer non-forming portion R <b> 2 (negative electrode mixture layer non-forming portion R <b> 4) is formed inside the case 6. By storing or the like, the battery 100 is formed.

なお、第２実施形態のその他の構成は、上記第１実施形態と同様である。   In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

第２実施形態では、以下のような効果を得ることができる。   In the second embodiment, the following effects can be obtained.

第２実施形態では、上記のように、内周側治具２０を発電要素２の正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）における内周部２ａに配置した状態で、金属製の正極集電体３１（負極集電体４１）よりも柔らかい押圧部材１２０によって、発電要素２の外周部２ｂから内周部２ａに向かって正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を押圧する工程を設ける。これにより、金属製のクシ歯及び加圧部材などにより正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）を挟み込んで正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする場合と異なり、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）が損傷するのを抑制することができる。また、押圧部材１２０によりＹ方向に挟み込むだけで正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングすることができるので、製造工程を簡素化するとともに、製造時間を短縮することができる。   In the second embodiment, as described above, the inner peripheral side jig 20 is disposed on the inner peripheral portion 2a in the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) of the power generation element 2. The positive electrode mixture layer non-forming portion R2 (negative electrode composite) is formed from the outer peripheral portion 2b of the power generating element 2 toward the inner peripheral portion 2a by the pressing member 120 that is softer than the metal positive electrode current collector 31 (negative electrode current collector 41). A step of pressing the agent layer non-forming portion R4) is provided. As a result, the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming part R4) is sandwiched between metal comb teeth and a pressure member, and the positive electrode mixture layer non-forming part R2 (negative electrode mixture layer non-forming) Unlike the case of forming the portion R4), the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) can be prevented from being damaged. In addition, since the positive electrode mixture layer non-formed part R2 (negative electrode mixture layer non-formed part R4) can be formed simply by being sandwiched in the Y direction by the pressing member 120, the manufacturing process is simplified and the manufacturing time is shortened. can do.

なお、第２実施形態のその他の効果は、上記第１実施形態と同様である。   The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれる。   The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

たとえば、上記第１及び第２実施形態では、正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４の両方をフォーミングする例を示したが、本発明はこれに限られない。本発明では、正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４のうちいずれか一方のみをフォーミングしてもよい。   For example, in the first and second embodiments, the example in which both the positive electrode mixture layer non-forming portion R2 and the negative electrode mixture layer non forming portion R4 are formed is shown, but the present invention is not limited to this. In the present invention, only one of the positive electrode mixture layer non-forming portion R2 and the negative electrode mixture layer non-forming portion R4 may be formed.

また、上記第１及び第２実施形態では、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする際に外周側治具と内周側治具とを配置する例を示したが、本発明はこれに限られない。内周側治具を発電要素の合剤層非形成部における内周部に配置して、発電要素の外周部から内周部に向かって合剤層非形成部を押圧することにより、合剤層非形成部が損傷するのを抑制して合剤層非形成部をフォーミングすることができる。すなわち、外周側治具を用いずに、内周側治具を用いて発電要素の外周部から内周部に向かって合剤層非形成部を押圧することにより、本願発明の効果を得ることができる。   Moreover, in the said 1st and 2nd embodiment, when forming positive mix layer non-formation part R2 (negative mix layer non-formation part R4), the example which arrange | positions an outer peripheral side jig | tool and an inner peripheral side jig | tool is formed. However, the present invention is not limited to this. The inner peripheral side jig is disposed on the inner peripheral portion of the power generating element in the mixture layer non-forming portion, and the mixture layer non-forming portion is pressed from the outer peripheral portion of the power generating element toward the inner peripheral portion. It is possible to form the mixture layer non-formed part while suppressing damage to the layer non-formed part. That is, the effect of the present invention is obtained by pressing the mixture layer non-forming portion from the outer peripheral portion of the power generation element toward the inner peripheral portion using the inner peripheral side jig without using the outer peripheral side jig. Can do.

また、上記第１及び第２実施形態では、樹脂製の内周側治具及び外周側治具を設けたが、本発明はこれに限られない。本発明では、樹脂以外の材料により形成された内周側治具及び外周側治具を設けてもよい。この場合、発電要素（正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４）を押圧して正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）をフォーミングする際に、内周側治具及び外周側治具が略変形しないような物性を有する材料を用いればよく、例えば、金属やセラミックスにより形成された内周側治具及び外周側治具を採用することができる。   Moreover, in the said 1st and 2nd embodiment, although the resin inner peripheral side jig | tool and the outer peripheral side jig | tool were provided, this invention is not limited to this. In this invention, you may provide the inner peripheral side jig | tool and outer peripheral side jig | tool formed with materials other than resin. In this case, when the power generation element (positive electrode mixture layer non-forming portion R2 and negative electrode mixture layer non-forming portion R4) is pressed to form the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4). In addition, a material having physical properties such that the inner peripheral side jig and the outer peripheral side jig do not substantially deform may be used. For example, an inner peripheral side jig and an outer peripheral side jig formed of metal or ceramics may be employed. Can do.

また、上記第１及び第２実施形態では、巻回軸線が延びる方向において、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）に対応する幅の内周側治具を配置する例を示したが、本発明はこれに限られない。本発明では、正極合剤層非形成部Ｒ２（負極合剤層非形成部Ｒ４）に対応する部分に加えて、正極合剤層形成部Ｒ１（負極合剤層形成部Ｒ３）に対応する部分にまで延びた内周側治具を配置してもよい。   In the first and second embodiments, the inner peripheral side jig having a width corresponding to the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4) is arranged in the direction in which the winding axis extends. However, the present invention is not limited to this. In the present invention, in addition to the portion corresponding to the positive electrode mixture layer non-forming portion R2 (negative electrode mixture layer non-forming portion R4), the portion corresponding to the positive electrode mixture layer forming portion R1 (negative electrode mixture layer forming portion R3) You may arrange | position the inner peripheral side jig | tool extended to.

また、上記第１及び第２実施形態では、内周側治具が、発電要素に嵌め込まれた状態でＸ方向側から見て、発電要素の内周部２ａに略対応する略長円形状に形成されている例を示したが、本発明はこれに限られない。本発明では、内周側治具を略長円形状に以外の形状に形成してもよい。   Moreover, in the said 1st and 2nd embodiment, an inner peripheral side jig | tool is substantially oval shape substantially corresponding to the inner peripheral part 2a of a power generation element seeing from the X direction side in the state fitted in the power generation element. Although an example of forming is shown, the present invention is not limited to this. In the present invention, the inner peripheral side jig may be formed in a shape other than a substantially oval shape.

また、上記第２実施形態では、巻回軸線が延びる方向において、発電要素の長手方向の長さよりも大きい長さを有する２つの押圧部材により、正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４を同時にフォーミングする例を示したが、本発明はこれに限られない。本発明では、正極合剤層非形成部Ｒ２に対応する位置に２つの押圧部材を設けるとともに、負極合剤層非形成部Ｒ４に対応する位置に２つの押圧部材を設けて、正極合剤層非形成部Ｒ２及び負極合剤層非形成部Ｒ４を別個にフォーミングしてもよい。   In the second embodiment, the positive electrode mixture layer non-forming portion R2 and the negative electrode mixture layer are formed by two pressing members having a length larger than the length in the longitudinal direction of the power generation element in the direction in which the winding axis extends. Although an example in which the non-forming portion R4 is simultaneously formed has been shown, the present invention is not limited to this. In the present invention, two pressing members are provided at a position corresponding to the positive electrode mixture layer non-forming portion R2, and two pressing members are provided at a position corresponding to the negative electrode mixture layer non-forming portion R4. The non-formed part R2 and the negative electrode mixture layer non-formed part R4 may be separately formed.

また、本発明に係る蓄電素子の製造方法により製造された蓄電素子の構成は特に限定されるものではなく、正極、負極及びセパレータを備える円筒型蓄電素子、角型蓄電素子（矩形状の蓄電素子）、扁平型蓄電素子等が一例として挙げられる。本発明は、上記の蓄電素子を複数備える蓄電装置としても実現することができる。蓄電装置の一形態を図１０に示す。図１０において、蓄電装置１４は、複数の蓄電ユニット１３を備えている。それぞれの蓄電ユニット１３は、複数の電池１（１００）を備えている。前記蓄電装置１４は、電気自動車（ＥＶ）、ハイブリッド自動車（ＨＥＶ）、プラグインハイブリッド自動車（ＰＨＥＶ）等の自動車用電源として用いる場合には、複数の電池を有するバッテリーモジュール（組電池）として搭載することができる。   In addition, the configuration of the energy storage device manufactured by the method for manufacturing the energy storage device according to the present invention is not particularly limited, and a cylindrical energy storage device including a positive electrode, a negative electrode, and a separator, a rectangular energy storage device (rectangular energy storage device) ), Flat electricity storage elements and the like. The present invention can also be realized as a power storage device including a plurality of the above power storage elements. One embodiment of a power storage device is shown in FIG. In FIG. 10, the power storage device 14 includes a plurality of power storage units 13. Each power storage unit 13 includes a plurality of batteries 1 (100). The power storage device 14 is mounted as a battery module (assembled battery) having a plurality of batteries when used as a power source for a vehicle such as an electric vehicle (EV), a hybrid vehicle (HEV), and a plug-in hybrid vehicle (PHEV). be able to.

１、１００ 電池（蓄電素子）
２ 発電要素
２ａ 内周部
２ｂ 外周部
３ 正極
４ 負極
５ セパレータ
２０ 内周側治具（合剤層非形成部成形治具）
２１ 外面側治具
３１ 正極集電体（電極集電体）
３２ 正極合剤層（合剤層）
４１ 負極集電体（電極集電体）
４２ 負極合剤層（合剤層）
１２０ 押圧部材（柔らかい部材）
７００ 巻回軸線
Ｒ１ 正極合剤層形成部（合剤層形成部）
Ｒ２ 正極合剤層非形成部（合剤層非形成部）
Ｒ３ 負極合剤層形成部（合剤層形成部）
Ｒ４ 負極合剤層非形成部（合剤層非形成部） 1,100 battery (storage element)
2 Power generation element 2a Inner peripheral part 2b Outer peripheral part 3 Positive electrode 4 Negative electrode 5 Separator 20 Inner peripheral side jig (mixture layer non-formation part forming jig)
21 External surface side jig 31 Positive electrode current collector (electrode current collector)
32 Positive mix layer (mixture layer)
41 Negative electrode current collector (electrode current collector)
42 Negative electrode mixture layer (mixture layer)
120 Pressing member (soft member)
700 Winding axis R1 Positive electrode mixture layer forming part (mixture layer forming part)
R2 Positive electrode mixture layer non-formation part (mixture layer non-formation part)
R3 Negative electrode mixture layer forming part (mixture layer forming part)
R4 Negative electrode mixture layer non-formation part (mixture layer non-formation part)

Claims (5)

電極集電体上に合剤層が形成されている合剤層形成部および前記合剤層が形成されていない合剤層非形成部を含む電極とセパレータとを巻回した発電要素を備える蓄電素子の製造方法であって、
合剤層非形成部成形治具を前記発電要素の前記合剤層非形成部における内周部に配置した状態で、前記発電要素を減圧環境下に置くことによって、前記発電要素の外周部から内周部に向かって前記合剤層非形成部を押圧する工程を備える、蓄電素子の製造方法。 An electricity storage comprising a power generation element in which an electrode including a mixture layer forming portion in which a mixture layer is formed on an electrode current collector and a mixture layer non-forming portion in which the mixture layer is not formed and a separator are wound A method for manufacturing an element, comprising:
By placing the power generation element in a reduced pressure environment in a state where the mixture layer non-formation part forming jig is disposed on the inner peripheral part of the power generation element in the mixture layer non-formation part, from the outer peripheral part of the power generation element The manufacturing method of an electrical storage element provided with the process of pressing the said mixture layer non-formation part toward an inner peripheral part. 電極集電体上に合剤層が形成されている合剤層形成部および前記合剤層が形成されていない合剤層非形成部を含む電極とセパレータとを巻回した発電要素を備える蓄電素子の製造方法であって、
前記電極集電体は、金属製であり、
合剤層非形成部成形治具を前記発電要素の前記合剤層非形成部における内周部に配置した状態で、前記電極集電体よりも柔らかい部材によって、前記発電要素の外周部から内周部に向かって前記合剤層非形成部を押圧する工程を備える、蓄電素子の製造方法。 An electricity storage comprising a power generation element in which an electrode including a mixture layer forming portion in which a mixture layer is formed on an electrode current collector and a mixture layer non-forming portion in which the mixture layer is not formed and a separator are wound A method for manufacturing an element, comprising:
The electrode current collector is made of metal,
In a state where the mixture layer non-forming part forming jig is arranged on the inner peripheral part of the power generating element in the mixture layer non-forming part, the inner member is formed from the outer peripheral part of the power generating element by a member softer than the electrode current collector. The manufacturing method of an electrical storage element provided with the process of pressing the said mixture layer non-formation part toward a surrounding part. 前記発電要素は、巻回軸線が延びる方向から見て、略長円形状であり、
前記合剤層非形成部成形治具としての内周側治具を前記発電要素の前記合剤層非形成部における内周部に配置し、かつ、前記内周側治具とは異なる外周側治具を前記発電要素の前記合剤層非形成部における曲面形状を有する部分の外周部に配置した状態で、前記発電要素の外周部から内周部に向かって前記合剤層非形成部を押圧する、請求項１または２に記載の蓄電素子の製造方法。 The power generation element is substantially oval when viewed from the direction in which the winding axis extends,
An inner peripheral side jig as the mixture layer non-forming part forming jig is arranged on an inner peripheral part of the power generation element in the mixture layer non-forming part, and the outer peripheral side is different from the inner peripheral side jig With the jig disposed on the outer peripheral portion of the portion having the curved surface shape in the mixture layer non-forming portion of the power generation element, the mixture layer non-forming portion is formed from the outer peripheral portion of the power generation element toward the inner peripheral portion. The manufacturing method of the electrical storage element of Claim 1 or 2 pressed. 前記発電要素の巻回軸線が延びる方向から見て、前記合剤層非形成部成形治具を前記発電要素の前記合剤層非形成部における内周部の略全体と接触するように前記発電要素の前記合剤層非形成部における内周部に嵌め込んだ状態で、前記発電要素の外周部から内周部に向かって前記合剤層非形成部を押圧する、請求項１〜３のいずれか１項に記載の蓄電素子の製造方法。   When viewed from the direction in which the winding axis of the power generating element extends, the power generation element is configured so that the mixture layer non-forming part forming jig is in contact with substantially the entire inner peripheral part of the power generating element non-mixing layer forming part. The mixture layer non-forming portion is pressed from the outer peripheral portion of the power generation element toward the inner peripheral portion in a state of being fitted into the inner peripheral portion of the mixture layer non-forming portion of the element. The manufacturing method of the electrical storage element of any one. 請求項１〜４のいずれか１項に記載の蓄電素子の製造方法を用いて製造される、蓄電素子。   The electrical storage element manufactured using the manufacturing method of the electrical storage element of any one of Claims 1-4.
JP2014178824A 2014-09-03 2014-09-03 Method for manufacturing power storage device and power storage device Pending JP2016054039A (en)

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