JP6432246B2 - Screw member and electrode assembly manufacturing apparatus - Google Patents
Screw member and electrode assembly manufacturing apparatus Download PDFInfo
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- JP6432246B2 JP6432246B2 JP2014196955A JP2014196955A JP6432246B2 JP 6432246 B2 JP6432246 B2 JP 6432246B2 JP 2014196955 A JP2014196955 A JP 2014196955A JP 2014196955 A JP2014196955 A JP 2014196955A JP 6432246 B2 JP6432246 B2 JP 6432246B2
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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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- 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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Description
本発明は、締結具によって螺進又は螺退させる樹脂製のねじ部材、及び該ねじ部材を使用した電極組立体の製造装置に関する。 The present invention relates to a resin screw member that is screwed or unscrewed by a fastener, and an electrode assembly manufacturing apparatus using the screw member.
ＥＶ（Electric Vehicle）やＰＨＶ（Plug in Hybrid Vehicle）などの車両には、原動機となる電動機への供給電力を蓄える蓄電装置としてリチウムイオン電池などの二次電池が搭載されている。二次電池は、例えば両面に活物質層が形成された矩形状の正極電極と負極電極がセパレータを間に挟んだ状態で積層された電極組立体を備える。 A vehicle such as an EV (Electric Vehicle) or a PHV (Plug in Hybrid Vehicle) is equipped with a secondary battery such as a lithium ion battery as a power storage device that stores power supplied to an electric motor serving as a prime mover. The secondary battery includes, for example, an electrode assembly in which a rectangular positive electrode having an active material layer formed on both sides and a negative electrode are stacked with a separator interposed therebetween.
二次電池のうち、角型の二次電池の製造時には、正極電極、セパレータ、及び負極電極を積層して電極組立体を形成した後、電極組立体は、その積層方向に荷重を加えた状態で拘束され、その拘束状態での積層方向への寸法（以下、厚みとする）が測定される。そして、電極組立体の厚みが所定の値の範囲内にあるか否かが判断される。電極組立体の厚みが所定の値の範囲内にある場合には、ケースの内寸との差について、電極組立体の端面に厚み調整部材を重ね、電極組立体の厚みを調整している。 Among secondary batteries, when manufacturing a square secondary battery, a positive electrode, a separator, and a negative electrode are stacked to form an electrode assembly, and then the electrode assembly is in a state in which a load is applied in the stacking direction. The dimension in the stacking direction in the restrained state (hereinafter referred to as thickness) is measured. Then, it is determined whether or not the thickness of the electrode assembly is within a predetermined value range. When the thickness of the electrode assembly is within a predetermined value range, the thickness of the electrode assembly is adjusted by overlapping a thickness adjusting member on the end face of the electrode assembly with respect to the difference from the inner dimension of the case.
厚み調整された電極組立体の厚みを保持するため、厚み調整器が使用される場合がある。厚み調整器としては、例えば、電極組立体を積層方向の両方から挟む一対の金属製の板材と、電極組立体を挟んだ一対の板材の間隔が開かないようにするため、一対の板材のうちの一方に設けられた雌ねじ孔に螺合されるボルトと、を備えたものがある。 In order to maintain the thickness of the electrode assembly whose thickness has been adjusted, a thickness adjuster may be used. As the thickness adjuster, for example, in order to prevent the gap between the pair of metal plate members sandwiching the electrode assembly from both the stacking direction and the pair of plate members sandwiching the electrode assembly from being opened, And a bolt that is screwed into a female screw hole provided on one of the two.
このような厚み調整器において、金属製の雌ねじ孔へのボルトの螺進又は螺退の際、金属異物が生じないようにするため、樹脂製のボルトが使用されるのが好ましく、樹脂製のボルトとしては、例えば特許文献１に開示のものがある。特許文献１の樹脂ボルトは、樹脂に金属製骨材を埋め込んで補強したものである。 In such a thickness adjuster, it is preferable to use a resin bolt in order to prevent metal foreign matter from being generated when the bolt is screwed into or retracted from the metal female screw hole. An example of the bolt is disclosed in Patent Document 1. The resin bolt of Patent Document 1 is reinforced by embedding a metal aggregate in a resin.
ところで、二次電池の製造において、厚み調整器を用いた電極組立体の厚み調整作業においては、板材の雌ねじ孔に対するボルトの螺進又は螺退は、一般的に、ナットランナーといった締結具を使用して行うことで作業効率を向上させることができる。しかし、特許文献１の樹脂ボルトでは、雌ねじ孔へ螺進させる際には、締結具に対し樹脂ボルトを手作業で取り付ける必要がある。また、締結具によって樹脂ボルトを雌ねじ孔から螺退させた後は、その樹脂ボルトを手作業で収納場所に戻す必要があり、作業効率が悪い。 By the way, in the manufacture of the secondary battery, in the thickness adjustment work of the electrode assembly using the thickness adjuster, the bolts are generally screwed or unscrewed with respect to the female screw holes of the plate material by using a fastener such as a nut runner. By doing so, work efficiency can be improved. However, in the resin bolt disclosed in Patent Document 1, when screwing into the female screw hole, it is necessary to manually attach the resin bolt to the fastener. In addition, after the resin bolt is screwed out of the female screw hole by the fastener, it is necessary to manually return the resin bolt to the storage place, resulting in poor work efficiency.
本発明は、このような従来の技術に存在する問題点に着目してなされたものであり、その目的は、締結具を用いた作業の作業効率を向上させることができるねじ部材及び電極組立体の製造装置を提供することにある。 The present invention has been made paying attention to such problems existing in the prior art, and an object of the present invention is to provide a screw member and an electrode assembly capable of improving work efficiency of work using a fastener. It is to provide a manufacturing apparatus.
上記問題点を解決するためのねじ部材は、締結具によって螺進又は螺退させる樹脂製のねじ部材であって、前記締結具の回転が伝達されて回転する伝達部を有し、前記伝達部の表面に沿って配置された磁性体を備えることを要旨とする。 A screw member for solving the above-mentioned problem is a resin screw member that is screwed or screwed by a fastener, and has a transmission portion that is rotated by the rotation of the fastener, and the transmission portion The gist of the present invention is to provide a magnetic body disposed along the surface.
これによれば、ねじ部材を対象物に螺進させて螺合する際、磁性体の持つ磁性によって、締結具に磁石を用いた場合には、その磁石にねじ部材を磁着させることができる。このため、例えば、ねじ部材の収納場所に締結具を近付けることで、ねじ部材を自動的に締結具の磁石に磁着させ、締結具と共にねじ部材を対象物まで搬送することができる。また、締結具によってねじ部材を対象物から螺退させた後は、ねじ部材を締結具の磁石に磁着させたまま、締結具と共にねじ部材を収納場所まで搬送することができる。したがって、締結具によって、ねじ部材を螺進させる作業、又は螺退させる作業の作業効率を向上させることができる。 According to this, when the screw member is screwed into the object and screwed, when the magnet is used for the fastener due to the magnetism of the magnetic body, the screw member can be magnetically attached to the magnet. . For this reason, for example, by bringing the fastener close to the storage location of the screw member, the screw member can be automatically magnetically attached to the magnet of the fastener, and the screw member can be transported to the object together with the fastener. Further, after the screw member is screwed off from the object by the fastener, the screw member can be transported to the storage location together with the fastener while the screw member is magnetically attached to the magnet of the fastener. Therefore, the work efficiency of the work of screwing or screwing the screw member can be improved by the fastener.
また、ねじ部材について、前記ねじ部材は、前記伝達部としての頭部と、該頭部に一体であり、雄ねじ部を有する軸部とを有するボルトであり、該ボルトの軸方向に沿った前記頭部の先端に、前記締結具の先端部が挿入される六角穴を備え、該六角穴の内側面に沿って前記磁性体が配置されている。 Further, regarding the screw member, the screw member is a bolt having a head portion as the transmission portion and a shaft portion that is integral with the head portion and has a male screw portion, and the axial direction of the bolt is A hexagonal hole into which the distal end portion of the fastener is inserted is provided at the distal end of the head, and the magnetic body is disposed along the inner surface of the hexagonal hole.
これによれば、六角穴の内側面を磁性体によって補強することもできる。このため、締結具の先端部を六角穴に挿入し、締結具によってボルトを螺進又は螺退させる際、六角穴の内側面によってトルクを好適に受け止め、ボルトを効率良く螺進又は螺退させることができる。 According to this, the inner surface of the hexagonal hole can be reinforced by the magnetic body. For this reason, when inserting the front-end | tip part of a fastener into a hexagonal hole and screwing or screwing a bolt with a fastener, torque is received suitably by the inner surface of a hexagonal hole, and a bolt is screwed or screwed efficiently. be able to.
また、ねじ部材について、前記磁性体は磁石であってもよい。
これによれば、万一、締結具の先端部がねじ部材との接触等により欠落して金属異物が生じても、その金属異物をねじ部材の磁石に磁着させることができる。
In the screw member, the magnetic body may be a magnet.
According to this, even if the tip of the fastener is lost due to contact with the screw member or the like and a metal foreign matter is generated, the metal foreign matter can be magnetically attached to the magnet of the screw member.
上記問題点を解決するための電極組立体の製造装置は、異なる極性の電極が、両者の間にセパレータを間に介在させた状態で積層された電極組立体の製造装置であって、前記電極組立体を積層方向両端の偏平面から挟む一対の金属板製の挟持部材と、一対の挟持部材間の間隔を固定するねじ部材と、を有し、前記一対の挟持部材は、前記電極組立体を積層方向両側から挟んだ状態において前記偏平面に交差する前記電極組立体の側面から突出した突出部を有するとともに、該突出部に雌ねじ孔を備え、前記ねじ部材は、締結具によって螺進又は螺退させる樹脂製のボルトであり、前記締結具の回転が伝達される頭部と、該頭部に一体であり、前記雌ねじ孔に螺合する雄ねじ部を有する軸部と、前記頭部の表面に沿って配置された磁性体と、を備えることを要旨とする。 An apparatus for manufacturing an electrode assembly for solving the above problem is an apparatus for manufacturing an electrode assembly in which electrodes of different polarities are stacked with a separator interposed therebetween. A pair of metal plate sandwiching members that sandwich the assembly from the flat surfaces at both ends in the stacking direction; and a screw member that fixes a distance between the pair of sandwiching members, and the pair of sandwiching members includes the electrode assembly In a state sandwiched from both sides in the stacking direction, and having a protruding portion protruding from the side surface of the electrode assembly that intersects the flat surface, the protruding portion is provided with a female screw hole, and the screw member is screwed or fastened by a fastener. A resin bolt to be screwed, a head portion to which rotation of the fastener is transmitted, a shaft portion that is integral with the head portion and has a male screw portion that is screwed into the female screw hole; A magnetic body arranged along the surface; The gist be obtained.
これによれば、電極組立体の積層方向への寸法を調整する際、一対の挟持部材によって、電極組立体が積層方向両側から挟まれる。そして、挟持部材の突出部に設けた雌ねじ孔にボルトの雄ねじ部を螺合し、一対の挟持部材の間隔を固定する。ボルトを雌ねじ孔に螺進して螺合する際、締結具に磁石を用いた場合には、頭部の磁性体によって、ボルトを締結具に磁着させることができる。よって、ボルトの収納場所に締結具を近付けることで、ボルトを自動的に締結具の磁石に磁着させ、締結具と共にボルトを製造装置まで搬送することができる。また、締結具によってボルトを雌ねじ孔から螺退させた後は、ボルトを締結具の磁石に磁着させたまま、締結具と共にボルトを収納場所まで搬送することができる。したがって、締結具によってボルトを螺進させる作業、又は螺退させる作業の作業効率が向上し、電極組立体の積層方向への寸法を調整する作業の作業効率を向上させることができる。さらに、万一、締結具の先端部がボルトとの接触等により欠落して金属異物が生じても、その金属異物を締結具の磁石に磁着させることができ、電極組立体に金属異物が侵入することを抑制することができる。 According to this, when adjusting the dimension to the lamination direction of an electrode assembly, an electrode assembly is pinched | interposed from a lamination direction both sides by a pair of clamping member. And the external thread part of a volt | bolt is screwed in the internal thread hole provided in the protrusion part of the clamping member, and the space | interval of a pair of clamping member is fixed. When a bolt is screwed into the female screw hole and screwed, when the magnet is used as the fastener, the bolt can be magnetically attached to the fastener by the magnetic body of the head. Therefore, by bringing the fastener close to the bolt storage location, the bolt can be automatically magnetically attached to the magnet of the fastener, and the bolt can be transported to the manufacturing apparatus together with the fastener. Further, after the bolt is screwed out of the female screw hole by the fastener, the bolt can be transported to the storage location together with the fastener while the bolt is magnetically attached to the magnet of the fastener. Therefore, the work efficiency of the work of screwing the bolt with the fastener or the work of screwing the bolt is improved, and the work efficiency of the work of adjusting the dimension of the electrode assembly in the stacking direction can be improved. In addition, even if the tip of the fastener is lost due to contact with the bolt or the like and a metal foreign matter is generated, the metal foreign matter can be magnetically attached to the magnet of the fastener, and the metal foreign matter can be attached to the electrode assembly. Intrusion can be suppressed.
本発明によれば、締結具を用いた作業の作業効率を向上させることができる。 According to the present invention, work efficiency of work using a fastener can be improved.
以下、ねじ部材及び電極組立体の製造装置を具体化した一実施形態を図１〜図８にしたがって説明する。
図１及び図２に示すように、二次電池１０はリチウムイオン二次電池であり、その外郭を構成する金属製のケース１１を備えている。ケース１１は、一面に開口部１２ａを備える有底直方体状のケース本体１２と、ケース本体１２の開口部１２ａを塞ぐ蓋１３とを備えている。ケース本体１２は、長方形状の底板１２ｂと、底板１２ｂの対向する一対の短側縁から立設された短側壁１２ｃと、底板１２ｂの対向する一対の長側縁から立設された長側壁１２ｄとを備える。ケース１１には、電極組立体１４及び電解質としての電解液（図示略）が収容されている。電極組立体１４は、ケース本体１２の内部空間が直方体形状であることに対応させて、全体として直方体形状である。
Hereinafter, an embodiment embodying a manufacturing apparatus for a screw member and an electrode assembly will be described with reference to FIGS.
As shown in FIG. 1 and FIG. 2, the secondary battery 10 is a lithium ion secondary battery, and includes a metal case 11 that forms the outline of the secondary battery 10. The case 11 includes a bottomed rectangular parallelepiped case main body 12 having an opening 12 a on one surface, and a lid 13 that closes the opening 12 a of the case main body 12. The case body 12 includes a rectangular bottom plate 12b, a short side wall 12c erected from a pair of opposed short side edges of the bottom plate 12b, and a long side wall 12d erected from a pair of long side edges of the bottom plate 12b. With. The case 11 contains an electrode assembly 14 and an electrolytic solution (not shown) as an electrolyte. The electrode assembly 14 has a rectangular parallelepiped shape as a whole, corresponding to the internal space of the case body 12 having a rectangular parallelepiped shape.
図３に示すように、電極組立体１４は、矩形シート状の電極としての正極電極２１、及び矩形シート状の電極としての負極電極２４と、樹脂製にて、電気伝導に係るイオン（リチウムイオン）が通過可能な多孔質膜で形成されたセパレータ２７とを備えている。正極電極２１は、矩形状の正極用金属箔（本実施形態ではアルミニウム箔）２２と、その正極用金属箔２２の両面（表面）に設けられた矩形状の正極活物質層２３と、を有する。正極電極２１は、その一辺２２ｃに沿って活物質を有しない正極未塗工部２２ｄを有する。正極電極２１の一辺２２ｃの一部には、正極集電タブ３１が、正極用金属箔２２の一部を突出する状態に形成して設けられている。 As shown in FIG. 3, the electrode assembly 14 includes a positive electrode 21 as a rectangular sheet-like electrode, a negative electrode 24 as a rectangular sheet-like electrode, and a resin-made ion (lithium ion). And a separator 27 formed of a porous membrane that can pass through. The positive electrode 21 has a rectangular positive electrode metal foil (aluminum foil in the present embodiment) 22 and a rectangular positive electrode active material layer 23 provided on both surfaces (surfaces) of the positive electrode metal foil 22. . The positive electrode 21 has a positive electrode uncoated portion 22d having no active material along one side 22c. A positive electrode current collecting tab 31 is formed on a part of one side 22c of the positive electrode 21 so as to protrude a part of the metal foil 22 for positive electrode.
負極電極２４は、矩形状の負極用金属箔（本実施形態では銅箔）２５と、その負極用金属箔２５の両面（表面）に設けられた矩形状の負極活物質層２６と、を有する。負極電極２４は、その一辺２５ｃに沿って活物質を有しない負極未塗工部２５ｄを有する。負極電極２４の一辺２５ｃの一部には、負極集電タブ３２が、負極用金属箔２５の一部を突出する状態に形成して設けられている。 The negative electrode 24 has a rectangular negative electrode metal foil (copper foil in this embodiment) 25 and a rectangular negative electrode active material layer 26 provided on both surfaces (surfaces) of the negative electrode metal foil 25. . The negative electrode 24 has a negative electrode uncoated portion 25d having no active material along one side 25c. A negative electrode current collecting tab 32 is provided on a part of one side 25 c of the negative electrode 24 so as to protrude a part of the metal foil 25 for negative electrode.
図１に示すように、正極電極２１と、負極電極２４と、セパレータ２７は、正極集電タブ３１が積層方向に沿って列状に配置され、且つ正極集電タブ３１と重ならない位置にて負極集電タブ３２が積層方向に沿って列状に配置されるように積層される。そして、電極組立体１４は、正極集電タブ３１及び負極集電タブ３２が突出したタブ側端面３６を備え、このタブ側端面３６では、各正極集電タブ３１及び各負極集電タブ３２は、電極組立体１４における積層方向の一端から他端までの範囲内で集められた（束ねられた）状態で折り曲げられている。各正極集電タブ３１が重なっている箇所を溶接することによって各正極集電タブ３１が電気的に接続されるとともに、正極集電タブ３１に正極導電部材４１ａが接続されている。正極導電部材４１ａには、電極組立体１４から電気を取り出すための正極端子４１ｂが接続されている。 As shown in FIG. 1, the positive electrode 21, the negative electrode 24, and the separator 27 are arranged at positions where the positive electrode current collecting tabs 31 are arranged in a line along the stacking direction and do not overlap with the positive electrode current collecting tabs 31. The negative electrode current collecting tabs 32 are stacked so as to be arranged in a line along the stacking direction. The electrode assembly 14 includes a tab-side end surface 36 from which the positive electrode current collecting tab 31 and the negative electrode current collecting tab 32 protrude, and each of the positive electrode current collecting tab 31 and each negative electrode current collecting tab 32 is The electrode assembly 14 is bent in a state of being collected (bundled) within a range from one end to the other end in the stacking direction. The positive current collecting tabs 31 are electrically connected by welding the portions where the positive current collecting tabs 31 are overlapped, and the positive electrode conductive member 41 a is connected to the positive current collecting tab 31. A positive electrode terminal 41 b for taking out electricity from the electrode assembly 14 is connected to the positive electrode conductive member 41 a.
同様に、各負極集電タブ３２が重なっている箇所を溶接することによって各負極集電タブ３２が電気的に接続されるとともに、負極集電タブ３２に負極導電部材４２ａが接続されている。負極導電部材４２ａには、電極組立体１４から電気を取り出すための負極端子４２ｂが接続されている。正極端子４１ｂ及び負極端子４２ｂは蓋１３を貫通してケース１１外に突出するとともに、正極端子４１ｂ及び負極端子４２ｂは絶縁リング１３ｂによって蓋１３から絶縁されている。 Similarly, the negative electrode current collecting tabs 32 are electrically connected by welding the portions where the negative electrode current collecting tabs 32 overlap, and the negative electrode current collecting tabs 32 are connected to the negative electrode conductive members 42a. A negative electrode terminal 42b for taking out electricity from the electrode assembly 14 is connected to the negative electrode conductive member 42a. The positive terminal 41b and the negative terminal 42b penetrate the lid 13 and protrude out of the case 11, and the positive terminal 41b and the negative terminal 42b are insulated from the lid 13 by the insulating ring 13b.
電極組立体１４の積層方向への寸法を、電極組立体１４の厚みとすると、電極組立体１４は、その厚みがケース１１の内寸より僅かに小さくなるように厚み調整される。また、電極組立体１４は、積層方向両端に偏平面４４を備える。さらに、電極組立体１４は、偏平面４４に交差する四つの面のうち、タブ側端面３６に繋がる二つの面に側面３７を備え、残りの一つの面に底面３８を備える。電極組立体１４は、底面３８がケース本体１２の底板１２ｂに支持され、偏平面４４がケース本体１２の長側壁１２ｄに対向するとともに、側面３７が短側壁１２ｃに対向する。二次電池１０において、電極組立体１４の一方の偏平面４４と、該偏平面４４に対向するケース本体１２の一方の長側壁１２ｄとの間には、厚み調整部材４５が介装されている。厚み調整部材４５は、所定の厚みの樹脂製のフィルムであり、電極組立体１４の厚みに対応し、１枚〜複数枚が重ねられ、本実施形態では１枚の厚み調整部材４５が使用されている。なお、積層された正極電極２１、負極電極２４、セパレータ２７、及び厚み調整部材４５は、図１に示す固定用テープ４６を電極組立体１４の複数箇所に貼り付けることで一体に固定されている。 When the dimension of the electrode assembly 14 in the stacking direction is the thickness of the electrode assembly 14, the thickness of the electrode assembly 14 is adjusted so that the thickness is slightly smaller than the inner dimension of the case 11. Further, the electrode assembly 14 includes the flat surfaces 44 at both ends in the stacking direction. Furthermore, the electrode assembly 14 includes a side surface 37 on two surfaces connected to the tab-side end surface 36 among the four surfaces intersecting the flat surface 44, and a bottom surface 38 on the remaining one surface. The electrode assembly 14 has a bottom surface 38 supported by the bottom plate 12b of the case body 12, a flat plane 44 facing the long side wall 12d of the case body 12, and a side surface 37 facing the short side wall 12c. In the secondary battery 10, a thickness adjusting member 45 is interposed between one flat surface 44 of the electrode assembly 14 and one long side wall 12 d of the case body 12 facing the flat surface 44. . The thickness adjusting member 45 is a resin film having a predetermined thickness and corresponds to the thickness of the electrode assembly 14. One or more sheets are stacked, and in this embodiment, one thickness adjusting member 45 is used. ing. The stacked positive electrode 21, negative electrode 24, separator 27, and thickness adjusting member 45 are fixed together by attaching the fixing tape 46 shown in FIG. 1 to a plurality of locations of the electrode assembly 14. .
次に、電極組立体の製造装置５０について説明する。
電極組立体の製造装置５０は、電極組立体１４の厚みを調整するために用いられる。
図７に示すように、電極組立体の製造装置５０は、金属板製の一対の挟持部材５１，５２と、電極組立体１４に積層方向への荷重を付与する荷重付与装置６６とを備える。図４に示すように、一対の挟持部材５１，５２は、最も面積の大きい二つの面のうちの一方の面に、電極組立体１４の偏平面４４に接触する接触面５１ａ，５２ａを有する。
Next, the electrode assembly manufacturing apparatus 50 will be described.
The electrode assembly manufacturing apparatus 50 is used to adjust the thickness of the electrode assembly 14.
As shown in FIG. 7, the electrode assembly manufacturing apparatus 50 includes a pair of clamping members 51 and 52 made of a metal plate, and a load applying device 66 that applies a load in the stacking direction to the electrode assembly 14. As shown in FIG. 4, the pair of clamping members 51 and 52 have contact surfaces 51 a and 52 a that are in contact with the flat surface 44 of the electrode assembly 14 on one of the two surfaces having the largest area.
図８に示すように、挟持部材５１，５２において、接触面５１ａ，５２ａの長手方向に沿った寸法Ｎ１は、電極組立体１４において、偏平面４４に沿って一対の側面３７を結んだ最短距離Ｌ１より長い。このため、一対の挟持部材５１，５２で電極組立体１４を積層方向両側から挟んだとき、挟持部材５１，５２は、電極組立体１４の両方の側面３７から突出する突出部５１ｃ，５２ｃを備える。 As shown in FIG. 8, in the clamping members 51 and 52, the dimension N1 along the longitudinal direction of the contact surfaces 51a and 52a is the shortest distance connecting the pair of side surfaces 37 along the flat plane 44 in the electrode assembly 14. Longer than L1. For this reason, when the electrode assembly 14 is sandwiched from both sides in the stacking direction by the pair of sandwiching members 51, 52, the sandwiching members 51, 52 include projecting portions 51 c, 52 c that project from both side surfaces 37 of the electrode assembly 14. .
図４に示すように、各突出部５１ｃ，５２ｃは、挟持部材５１，５２において、接触面５１ａ，５２ａの長手方向両端側に存在する。一方の挟持部材５１は、各突出部５１ｃに一対の雌ねじ孔５１ｂを備え、他方の挟持部材５２は、各突出部５２ｃに一対の挿通孔５２ｂを備える。 As shown in FIG. 4, the projecting portions 51 c and 52 c exist on both ends of the contact surfaces 51 a and 52 a in the longitudinal direction in the sandwiching members 51 and 52. One clamping member 51 includes a pair of female screw holes 51b in each protrusion 51c, and the other clamping member 52 includes a pair of insertion holes 52b in each protrusion 52c.
また、図８に示すように、挟持部材５１，５２の短手方向への寸法Ｎ２は、電極組立体１４において、偏平面４４に沿ってタブ側端面３６と底面３８を結んだ最短距離Ｌ２と同じ、又は最短距離Ｌ２より長い。 As shown in FIG. 8, the dimension N2 of the clamping members 51 and 52 in the short direction is the shortest distance L2 connecting the tab side end surface 36 and the bottom surface 38 along the decentered plane 44 in the electrode assembly 14. The same or longer than the shortest distance L2.
挟持部材５１，５２には、各辺より中央に向かう切欠き５３が設けられている。この切欠き５３は、挟持部材５１，５２の対向する位置に設けられ、固定用テープ４６の幅よりも僅かに広い幅に設定されている。 The sandwiching members 51 and 52 are provided with a notch 53 from each side toward the center. The notch 53 is provided at a position where the clamping members 51 and 52 are opposed to each other, and is set to have a width slightly wider than the width of the fixing tape 46.
電極組立体の製造装置５０は、ねじ部材としてボルト５７を備え、ボルト５７は、一対の挟持部材５１，５２の間に電極組立体１４が挟まれた状態で、雌ねじ孔５１ｂに螺合される。そして、ボルト５７の雌ねじ孔５１ｂへの螺合により、一対の挟持部材５１，５２で電極組立体１４を挟んだ状態を保持できるとともに、一対の挟持部材５１，５２間の間隔を固定できるようになっている。 The electrode assembly manufacturing apparatus 50 includes a bolt 57 as a screw member, and the bolt 57 is screwed into the female screw hole 51b in a state where the electrode assembly 14 is sandwiched between the pair of clamping members 51 and 52. . The state where the electrode assembly 14 is sandwiched between the pair of sandwiching members 51 and 52 can be maintained by screwing the bolt 57 into the female screw hole 51b, and the interval between the pair of sandwiching members 51 and 52 can be fixed. It has become.
図５に示すように、ボルト５７は、円柱状の頭部５８と、頭部５８に一体の軸部５９と、頭部５８に埋設された磁性体としての磁石６０とを有する。頭部５８及び軸部５９は樹脂製である。ボルト５７の中心軸に沿う方向を軸方向とすると、頭部５８は、軸方向に沿った先端面から凹む六角穴５８ａを有する。六角穴５８ａは、ボルト５７の軸方向に沿った平面視が六角形状である。六角穴５８ａは、六つの内側面のうち、隣り合う内側面同士が交わって形成された角部に係合部５８ｂを有し、六角穴５８ａは六つの係合部５８ｂを等間隔おきに有する。 As shown in FIG. 5, the bolt 57 includes a columnar head portion 58, a shaft portion 59 integrated with the head portion 58, and a magnet 60 as a magnetic body embedded in the head portion 58. The head portion 58 and the shaft portion 59 are made of resin. If the direction along the central axis of the bolt 57 is the axial direction, the head 58 has a hexagonal hole 58a that is recessed from the tip surface along the axial direction. The hexagonal hole 58a has a hexagonal shape in plan view along the axial direction of the bolt 57. The hexagonal hole 58a has engaging portions 58b at corners formed by the adjacent inner side surfaces intersecting among the six inner side surfaces, and the hexagonal hole 58a has six engaging portions 58b at regular intervals. .
図４に示すように、六角穴５８ａには、一般的なナットランナーである締結具７０の回転部７１が挿入可能である。回転部７１は、軸方向全体に亘って断面が六角形の棒状であり、隣り合う側面同士が交わって形成された角部に係合突部７１ａを有し、回転部７１は六つの係合突部７１ａを等間隔おきに有する。また、回転部７１の先端部は、磁石となっている。そして、頭部５８には、締結具７０が備えるモータＭの回転が回転部７１を介して伝達され、ボルト５７が回転する。したがって、本実施形態では、頭部５８が伝達部を構成している。 As shown in FIG. 4, the rotating part 71 of the fastener 70 which is a general nut runner can be inserted in the hexagonal hole 58a. The rotating part 71 has a hexagonal bar shape in cross section over the entire axial direction, and has an engaging protrusion 71a at a corner part formed by crossing adjacent side surfaces, and the rotating part 71 has six engaging parts. The protrusions 71a are provided at equal intervals. Further, the tip of the rotating part 71 is a magnet. And rotation of the motor M with which the fastener 70 is provided is transmitted to the head 58 via the rotation part 71, and the volt | bolt 57 rotates. Therefore, in this embodiment, the head 58 constitutes a transmission unit.
図５及び図６に示すように、頭部５８に埋設された磁石６０は、六角穴５８ａの内側面を全周に亘って取り囲む六角環状である。磁石６０は、六角穴５８ａの六つの側面それぞれに対し一定距離を隔てて平行な状態に配置されている。なお、一定距離とは、六角穴５８ａに回転部７１が挿入されたとき、磁石６０の磁力によって、回転部７１にボルト５７が磁着できる距離に設定されている。よって、六角穴５８ａの内側面と磁石６０とは可能な限り近い方が好ましい。ただし、磁石６０が六角穴５８ａの内側面に露出していると、磁石６０と回転部７１とが直接接触し、金属異物発生の原因となるため、磁石６０は、六角穴５８ａの内側面から後退した位置にあり、頭部５８を形成した樹脂によって覆われている。したがって、磁石６０は、頭部５８の表面のうち、六角穴５８ａの内側面となる位置に面して配置されている。 As shown in FIGS. 5 and 6, the magnet 60 embedded in the head 58 is a hexagonal ring that surrounds the inner surface of the hexagonal hole 58 a over the entire circumference. The magnet 60 is arranged in parallel to each of the six side surfaces of the hexagonal hole 58a at a predetermined distance. The fixed distance is set to a distance at which the bolt 57 can be magnetically attached to the rotating portion 71 by the magnetic force of the magnet 60 when the rotating portion 71 is inserted into the hexagonal hole 58a. Therefore, the inner surface of the hexagonal hole 58a and the magnet 60 are preferably as close as possible. However, if the magnet 60 is exposed on the inner surface of the hexagonal hole 58a, the magnet 60 and the rotating part 71 are in direct contact with each other, causing the generation of metallic foreign matter. It is in the retracted position and is covered with the resin forming the head 58. Therefore, the magnet 60 is disposed so as to face the position that is the inner surface of the hexagonal hole 58 a in the surface of the head 58.
磁石６０は、インサート成形によって頭部５８に一体化されている。インサート成形完了時点では、磁石６０において、頭部５８の先端面に臨む端面６０ａは、頭部５８から露出した状態にある。よって、頭部５８は、磁石６０の端面６０ａを覆う樹脂製の皮膜６２を備える。この皮膜６２は、頭部５８及び軸部５９と同じ樹脂材料であってもよいし、頭部５８及び軸部５９とは別の樹脂材料であってもよい。そして、皮膜６２は、頭部５８の先端面全体を一定の厚みで覆っており、磁石６０は、その端面６０ａが頭部５８の表面である皮膜６２に沿って配置されている。 The magnet 60 is integrated with the head 58 by insert molding. At the time of completion of insert molding, the end surface 60 a facing the tip surface of the head 58 in the magnet 60 is in a state exposed from the head 58. Therefore, the head 58 includes a resin film 62 that covers the end surface 60 a of the magnet 60. The film 62 may be the same resin material as the head portion 58 and the shaft portion 59, or may be a resin material different from the head portion 58 and the shaft portion 59. And the film | membrane 62 has covered the whole front end surface of the head 58 with fixed thickness, and the magnet 60 is arrange | positioned along the film | membrane 62 whose end surface 60a is the surface of the head 58. FIG.
軸部５９は、周面に雄ねじ部５９ａを有し、この雄ねじ部５９ａは、一方の挟持部材５１の雌ねじ孔５１ｂに螺合可能である。
図７に示すように、電極組立体の製造装置５０が備える荷重付与装置６６は、一対の挟持部材５１，５２の間に電極組立体１４を挟んだ状態で、電極組立体１４に載せられた他方の挟持部材５２から電極組立体１４に荷重を付与する。荷重付与装置６６は、押圧部材６６ａを備え、押圧部材６６ａは他方の挟持部材５２に対し進退可能である。荷重付与装置６６によって電極組立体１４に付与される荷重は、押圧部材６６ａによって管理される。また、荷重付与装置６６によって電極組立体１４に荷重が付与されると、ボルト５７の雄ねじ部５９ａと、挟持部材５１の雌ねじ孔５１ｂとの螺合により、荷重付与によって定まった一対の挟持部材５１，５２間の間隔を固定し、維持することができるようになっている。
The shaft portion 59 has a male screw portion 59 a on the peripheral surface, and this male screw portion 59 a can be screwed into the female screw hole 51 b of one clamping member 51.
As shown in FIG. 7, the load applying device 66 included in the electrode assembly manufacturing apparatus 50 is placed on the electrode assembly 14 with the electrode assembly 14 sandwiched between the pair of clamping members 51 and 52. A load is applied to the electrode assembly 14 from the other clamping member 52. The load applying device 66 includes a pressing member 66 a, and the pressing member 66 a can advance and retreat with respect to the other holding member 52. The load applied to the electrode assembly 14 by the load applying device 66 is managed by the pressing member 66a. Further, when a load is applied to the electrode assembly 14 by the load applying device 66, the pair of clamping members 51 determined by applying the load by screwing between the male screw portion 59 a of the bolt 57 and the female screw hole 51 b of the clamping member 51. , 52 can be fixed and maintained.
次に、電極組立体１４の製造方法を作用とともに記載する。
まず、電極組立体１４の積層工程を行う。一方の挟持部材５１をセットし、その挟持部材５１上に、図示しない積層装置によって、正極電極２１、セパレータ２７、及び負極電極２４を積層していく。その結果、一方の挟持部材５１上に電極組立体１４が形成される。このとき、電極組立体１４の平面視において、挟持部材５１の突出部５１ｃは、電極組立体１４の両方の側面３７から突出している。
Next, the manufacturing method of the electrode assembly 14 will be described together with the operation.
First, the lamination process of the electrode assembly 14 is performed. One clamping member 51 is set, and the positive electrode 21, the separator 27, and the negative electrode 24 are laminated on the clamping member 51 by a laminating device (not shown). As a result, the electrode assembly 14 is formed on one clamping member 51. At this time, in the plan view of the electrode assembly 14, the protruding portions 51 c of the clamping member 51 protrude from both side surfaces 37 of the electrode assembly 14.
次に、図７に示すように、挟持部材５１上に電極組立体１４が形成された状態で、電極組立体１４の偏平面４４に他方の挟持部材５２を載せる。このとき、挟持部材５２の突出部５２ｃは、電極組立体１４の両方の側面３７から突出するように載せる。 Next, as shown in FIG. 7, the other holding member 52 is placed on the flat surface 44 of the electrode assembly 14 in a state where the electrode assembly 14 is formed on the holding member 51. At this time, the protruding portions 52 c of the clamping member 52 are placed so as to protrude from both side surfaces 37 of the electrode assembly 14.
次に、製造装置５０とは別の位置にあるボルト５７の収納場所へ締結具７０を移動させ、その締結具７０の回転部７１をボルト５７の頭部５８に挿入し、回転部７１の磁石と、頭部５８の磁石６０とを磁着させ、ボルト５７を回転部７１に磁着させる。そして、締結具７０を、収納場所から製造装置５０に向けて移動させ、締結具７０と共にボルト５７を製造装置５０に搬送する。そして、他方の挟持部材５２の挿通孔５２ｂにボルト５７の軸部５９を挿通した後、そのボルト５７を締結具７０によって回転させ、軸部５９を一方の挟持部材５１の雌ねじ孔５１ｂに螺合する。すると、一対の挟持部材５１，５２により電極組立体１４を積層方向両側から挟むことができる。なお、ボルト５７は、雌ねじ孔５１ｂに強く螺合させず、増締め可能な状態に螺合する。 Next, the fastener 70 is moved to a storage place for the bolt 57 at a position different from that of the manufacturing apparatus 50, the rotating portion 71 of the fastener 70 is inserted into the head 58 of the bolt 57, and the magnet of the rotating portion 71. And the magnet 60 of the head 58 are magnetically attached, and the bolt 57 is magnetically attached to the rotating portion 71. Then, the fastener 70 is moved from the storage location toward the manufacturing apparatus 50, and the bolts 57 are conveyed to the manufacturing apparatus 50 together with the fastener 70. Then, after inserting the shaft portion 59 of the bolt 57 into the insertion hole 52 b of the other holding member 52, the bolt 57 is rotated by the fastener 70, and the shaft portion 59 is screwed into the female screw hole 51 b of the one holding member 51. To do. Then, the electrode assembly 14 can be clamped from both sides in the stacking direction by the pair of clamping members 51 and 52. Note that the bolt 57 is not screwed into the female screw hole 51b, but is screwed into a state where it can be tightened.
次に、挟み込んだ電極組立体１４に積層方向へ荷重を付与する工程を行う。
図８に示すように、荷重付与装置６６が他方の挟持部材５２に向けて前進し、荷重付与装置６６は、他方の挟持部材５２を介して電極組立体１４に積層方向へ所定の荷重を加える。すると、他方の挟持部材５２が、ボルト５７の軸方向に沿って一方の挟持部材５１に向けて移動し、電極組立体１４に押し付けられる。すると、電極組立体１４の厚みが減っていく。次に、積層方向に拘束された電極組立体１４の厚みを測定する。そして、測定された電極組立体１４の厚みに基づき、用いる厚み調整部材４５の枚数を決定する。その後、電極組立体１４に荷重を加えるのを一旦、解除し、他方の挟持部材５２を取り外した後、決定された枚数の厚み調整部材４５を電極組立体１４の偏平面４４に重ねる。
Next, a step of applying a load to the sandwiched electrode assembly 14 in the stacking direction is performed.
As shown in FIG. 8, the load applying device 66 advances toward the other holding member 52, and the load applying device 66 applies a predetermined load to the electrode assembly 14 in the stacking direction via the other holding member 52. . Then, the other clamping member 52 moves toward the one clamping member 51 along the axial direction of the bolt 57 and is pressed against the electrode assembly 14. As a result, the thickness of the electrode assembly 14 decreases. Next, the thickness of the electrode assembly 14 constrained in the stacking direction is measured. Then, the number of thickness adjusting members 45 to be used is determined based on the measured thickness of the electrode assembly 14. Thereafter, the application of a load to the electrode assembly 14 is once released and the other clamping member 52 is removed, and then the determined number of thickness adjusting members 45 are stacked on the flat surface 44 of the electrode assembly 14.
その後、再度、他方の挟持部材５２を電極組立体１４の偏平面４４に載せ、ボルト５７を挿通孔５２ｂに挿通するとともに、雌ねじ孔５１ｂに螺合し、さらに、電極組立体１４に荷重を加える。荷重付与装置６６によって荷重を付与したままボルト５７を増締めする。すると、電極組立体１４は、一対の挟持部材５１，５２によって挟持されるとともに、一対の挟持部材５１，５２間の間隔、すなわち、電極組立体１４の厚みがボルト５７と雌ねじ孔５１ｂにより固定され、維持される。その結果、電極組立体１４は、圧縮された状態での厚みが維持され、正極電極２１、負極電極２４、セパレータ２７、及び厚み調整部材４５は、圧縮された状態で維持される。この状態で、挟持部材５１，５２に形成された切欠き５３を利用して、固定用テープ４６を電極組立体１４の積層方向の両側にわたり、複数箇所で貼り付ける。 Thereafter, the other clamping member 52 is again placed on the flat surface 44 of the electrode assembly 14, and the bolt 57 is inserted into the insertion hole 52 b and screwed into the female screw hole 51 b, and a load is applied to the electrode assembly 14. . The bolt 57 is tightened while the load is applied by the load applying device 66. Then, the electrode assembly 14 is sandwiched between the pair of sandwiching members 51 and 52, and the distance between the pair of sandwiching members 51 and 52, that is, the thickness of the electrode assembly 14 is fixed by the bolt 57 and the female screw hole 51b. Maintained. As a result, the thickness of the electrode assembly 14 is maintained in a compressed state, and the positive electrode 21, the negative electrode 24, the separator 27, and the thickness adjusting member 45 are maintained in a compressed state. In this state, the fixing tape 46 is pasted at a plurality of locations over both sides of the electrode assembly 14 in the stacking direction using the notches 53 formed in the holding members 51 and 52.
その後、一対の挟持部材５１，５２間の間隔を維持した状態で、荷重の付与を解除する工程を行う。荷重の付与を解除した後、電極組立体１４は、一定時間、挟持部材５１，５２に挟持された状態で安置される。その後、最後に、ボルト５７と雌ねじ孔５１ｂによる挟持を解除する工程を行う。すなわち、締結具７０の回転部７１を、ボルト５７の頭部５８に挿入し、回転部７１の磁石と、頭部５８の磁石６０とを磁着させ、ボルト５７を回転部７１に磁着させる。そして、そのボルト５７を締結具７０によって回転させ、軸部５９を雌ねじ孔５１ｂから螺退させる。次に、締結具７０を上昇させ、締結具７０と共にボルト５７を挟持部材５２の挿通孔５２ｂから抜き取る。すると、一対の挟持部材５１，５２からボルト５７を取り出すことができる。その後、締結具７０と共にボルト５７を収納場所まで搬送する。 Then, the process which cancels | releases provision of a load is performed in the state which maintained the space | interval between a pair of clamping members 51 and 52. FIG. After canceling the application of the load, the electrode assembly 14 is placed in a state of being sandwiched between the sandwiching members 51 and 52 for a certain period of time. Thereafter, finally, a step of releasing the clamping by the bolt 57 and the female screw hole 51b is performed. That is, the rotating part 71 of the fastener 70 is inserted into the head 58 of the bolt 57, the magnet of the rotating part 71 and the magnet 60 of the head 58 are magnetized, and the bolt 57 is magnetized to the rotating part 71. . And the volt | bolt 57 is rotated with the fastener 70, and the axial part 59 is screwed out from the internal thread hole 51b. Next, the fastener 70 is raised, and the bolt 57 together with the fastener 70 is extracted from the insertion hole 52 b of the clamping member 52. Then, the bolt 57 can be taken out from the pair of clamping members 51 and 52. Thereafter, the bolt 57 is transported to the storage location together with the fastener 70.
上記実施形態によれば、以下のような効果を得ることができる。
（１）ボルト５７の頭部５８に磁石６０を埋設した。このため、締結具７０の回転部７１が六角穴５８ａに挿入されると、回転部７１の磁石と、頭部５８の磁石６０とによって、頭部５８を回転部７１に磁着させることができる。よって、締結具７０をボルト５７に近付けるだけで、ボルト５７を締結具７０の回転部７１に磁着させることができる。さらに、締結具７０を製造装置５０に向けて移動させると同時に、ボルト５７を製造装置５０に向けて搬送できる。また、ボルト５７を雌ねじ孔５１ｂから螺退した後、締結具７０を上昇させると同時に、ボルト５７も上昇させ、製造装置５０から取り出すことができる。加えて、締結具７０とともに、ボルト５７を収納場所まで搬送することができる。したがって、ボルト５７の搬送や、取り付け、取り出し等を手作業で行う必要がなく、電極組立体１４の厚み調整作業の作業効率を向上させることができる。
According to the above embodiment, the following effects can be obtained.
(1) A magnet 60 is embedded in the head 58 of the bolt 57. For this reason, when the rotating part 71 of the fastener 70 is inserted into the hexagonal hole 58a, the head 58 can be magnetically attached to the rotating part 71 by the magnet of the rotating part 71 and the magnet 60 of the head 58. . Therefore, the bolt 57 can be magnetically attached to the rotating portion 71 of the fastener 70 only by bringing the fastener 70 close to the bolt 57. Furthermore, the bolts 57 can be conveyed toward the manufacturing apparatus 50 at the same time as the fastener 70 is moved toward the manufacturing apparatus 50. In addition, after the bolt 57 is screwed out of the female screw hole 51 b, the fastener 70 is raised, and at the same time, the bolt 57 can be raised and taken out from the manufacturing apparatus 50. In addition, the bolt 57 can be transported to the storage location together with the fastener 70. Therefore, it is not necessary to manually carry, attach, and remove the bolt 57, and the work efficiency of the thickness adjustment work of the electrode assembly 14 can be improved.
（２）磁石６０の内周面を六角穴５８ａの内側面の表面に沿うように配置し、可能な限り、磁石６０を六角穴５８ａの内側面に近付けた。このため、六角穴５８ａに挿入された回転部７１に対し、磁石６０の磁力によって頭部５８を強く磁着させることができ、回転部７１からボルト５７が落下しにくくなる。 (2) The inner peripheral surface of the magnet 60 is disposed along the inner surface of the hexagonal hole 58a, and the magnet 60 is moved as close to the inner surface of the hexagonal hole 58a as possible. For this reason, the head portion 58 can be strongly magnetized by the magnetic force of the magnet 60 with respect to the rotating portion 71 inserted into the hexagonal hole 58a, and the bolt 57 does not easily fall from the rotating portion 71.
（３）磁石６０において、インサート成形の完了時点で露出した端面６０ａは、皮膜６２によって覆われている。このため、回転部７１を六角穴５８ａに挿入するとき、金属製の回転部７１が磁石６０に直接接触することが無く、磁石６０と回転部７１が接触することによる金属異物の発生が抑制できる。したがって、製造装置５０による電極組立体１４の厚み調整の際に、金属異物が電極組立体１４に侵入することを抑制することができる。 (3) In the magnet 60, the end face 60a exposed at the time of completion of insert molding is covered with the coating 62. For this reason, when inserting the rotation part 71 in the hexagonal hole 58a, the metal rotation part 71 does not directly contact the magnet 60, and the generation of metal foreign matter due to the contact between the magnet 60 and the rotation part 71 can be suppressed. . Therefore, when the thickness of the electrode assembly 14 is adjusted by the manufacturing apparatus 50, it is possible to prevent the metal foreign matter from entering the electrode assembly 14.
（４）ボルト５７は、頭部５８に磁石６０を備える。このため、回転部７１を六角穴５８ａに挿入するとき、金属製の回転部７１が欠損し、万一、金属異物が発生しても、その金属異物を磁石６０に磁着させることができる。したがって、製造装置５０による電極組立体１４の厚み調整の際に、金属異物が電極組立体１４に侵入することを抑制することができる。 (4) The bolt 57 includes a magnet 60 on the head 58. For this reason, when the rotating part 71 is inserted into the hexagonal hole 58a, even if the metallic rotating part 71 is lost and a metal foreign object is generated, the metal foreign object can be magnetically attached to the magnet 60. Therefore, when the thickness of the electrode assembly 14 is adjusted by the manufacturing apparatus 50, it is possible to prevent the metal foreign matter from entering the electrode assembly 14.
（５）磁石６０は六角環状であり、六角穴５８ａの内側面に沿う状態に配置されている。このため、磁石６０によって、六角穴５８ａの内側面を補強することができる。よって、回転部７１の回転によって六角穴５８ａが変形しにくく、回転部７１の回転を六角穴５８ａの内側面で受け止め、ボルト５７を効率良く回転させることができる。 (5) The magnet 60 has a hexagonal ring shape and is arranged in a state along the inner surface of the hexagonal hole 58a. For this reason, the inner surface of the hexagonal hole 58a can be reinforced by the magnet 60. Therefore, the hexagonal hole 58a is not easily deformed by the rotation of the rotating part 71, and the rotation of the rotating part 71 is received by the inner surface of the hexagonal hole 58a, and the bolt 57 can be efficiently rotated.
なお、上記実施形態は以下のように変更してもよい。
○ 図９（ａ）に示すように、ボルト５７の頭部５８は平面視六角形状でもよい。この場合、六角穴５８ａが無く、頭部５８の先端面全体に磁石６７が接着されている。頭部５８の先端面に磁石６７を接着した後、図９（ｂ）に示すように、磁石６７の表面は樹脂製の被膜６８によって覆われる。よって、磁石６７は、伝達部である頭部５８の表面に沿って配置される。
In addition, you may change the said embodiment as follows.
As shown in FIG. 9A, the head 58 of the bolt 57 may have a hexagonal shape in plan view. In this case, there is no hexagonal hole 58a, and the magnet 67 is bonded to the entire front end surface of the head 58. After the magnet 67 is bonded to the tip surface of the head 58, the surface of the magnet 67 is covered with a resin film 68 as shown in FIG. Therefore, the magnet 67 is arrange | positioned along the surface of the head 58 which is a transmission part.
また、図１０に示すように、磁石６７は、頭部５８の先端面に凹設された凹部５８ｃに嵌合されていてもよく、この場合も、磁石６７は樹脂製の被膜６８によって覆われる。
このように構成した場合、頭部５８の先端面全体に磁石６０が設けられ、回転部７１に対向する磁石６０の面積をより広くすることができる。よって、回転部７１に対する磁着力を大きくして、回転部７１に磁着させやすくなる。
Further, as shown in FIG. 10, the magnet 67 may be fitted in a recess 58 c provided in the tip surface of the head 58, and in this case, the magnet 67 is covered with a resin coating 68. .
When configured in this manner, the magnet 60 is provided on the entire front end surface of the head portion 58, and the area of the magnet 60 facing the rotating portion 71 can be further increased. Therefore, the magnetizing force on the rotating part 71 is increased and the rotating part 71 is easily magnetized.
○ 図１１に示すように、実施形態のボルト５７において、磁石６０を六角板状とするとともに、六角穴５８ａの内底面に面するように磁石６０を埋設してもよい。この場合、六角穴５８ａに磁石６０を埋設した後、磁石６０の六角穴５８ａへの露出面を覆うように、樹脂製の皮膜６２を六角穴５８ａ内に設ける。 As shown in FIG. 11, in the bolt 57 of the embodiment, the magnet 60 may have a hexagonal plate shape, and the magnet 60 may be embedded so as to face the inner bottom surface of the hexagonal hole 58a. In this case, after embedding the magnet 60 in the hexagonal hole 58a, a resin film 62 is provided in the hexagonal hole 58a so as to cover the exposed surface of the magnet 60 to the hexagonal hole 58a.
○ 図１２に示すように、ねじ部材をナット８０に具体化してもよい。ナット８０は樹脂製であり、ナット８０は、その雌ねじ部８０ａを囲む磁石８１を有する。磁石８１は、六角環状であり、ナット８０の外側面（表面）に沿う状態で埋設されている。ナット８０において、ナットそのものが、締結具の回転が伝達されて回転する伝達部となる。この場合、締結具は、ナット８０の外側面を取り囲む六角穴を有するものであり、その六角穴に磁石が面している。よって、締結具の六角穴にナット８０を磁着させることで、締結具とともにナット８０の搬送、螺進、螺退が可能になる。 As shown in FIG. 12, the screw member may be embodied as a nut 80. The nut 80 is made of resin, and the nut 80 has a magnet 81 that surrounds the female screw portion 80a. The magnet 81 has a hexagonal ring shape and is embedded in a state along the outer surface (surface) of the nut 80. In the nut 80, the nut itself becomes a transmission portion that rotates by transmitting the rotation of the fastener. In this case, the fastener has a hexagonal hole surrounding the outer surface of the nut 80, and the magnet faces the hexagonal hole. Thus, by magnetizing the nut 80 in the hexagonal hole of the fastener, the nut 80 can be conveyed, screwed, and screwed together with the fastener.
○ ボルト５７は、電極組立体１４の厚み調整のための製造装置５０に採用されるものではなくてもよい。すなわち、締結具７０によって螺合されるボルトであれば、どのような目的で採用されてもよい。 The bolt 57 may not be employed in the manufacturing apparatus 50 for adjusting the thickness of the electrode assembly 14. In other words, any bolt may be employed as long as the bolt is screwed by the fastener 70.
○ 実施形態において、磁石６０は、六角環状でなくてもよく、六角穴５８ａを全周に亘って囲むことができれば、円環状や多角環状であってもよい。
○ 実施形態において、磁石６０は、環状でなくてもよく、六角穴５８ａの六つの側面に対応して設けられた複数枚の磁石であってもよい。
In the embodiment, the magnet 60 may not be a hexagonal ring, and may be an annular or polygonal ring as long as the hexagonal hole 58a can be surrounded over the entire circumference.
In the embodiment, the magnet 60 may not be annular, and may be a plurality of magnets provided corresponding to the six side surfaces of the hexagonal hole 58a.
○ 実施形態において、回転部７１の磁石に磁着できるのであれば、頭部５８に埋設されるのは磁石６０ではなく磁性体（強磁性体）であってもよい。
○ 実施形態において、固定用テープ４６の貼り付けは、電極組立体１４に荷重を付与した状態で行ったが、荷重の付与を解除した後、電極組立体１４が挟持部材５１，５２に挟持された状態で行ってもよい。
In the embodiment, as long as it can be magnetically attached to the magnet of the rotating portion 71, the magnetic head (ferromagnetic material) may be embedded in the head 58 instead of the magnet 60.
In the embodiment, the affixing of the fixing tape 46 is performed in a state where a load is applied to the electrode assembly 14. However, after the load is released, the electrode assembly 14 is sandwiched between the sandwiching members 51 and 52. You may carry out in the state.
○ 頭部５８において、回転部７１が挿入される穴は六角穴５８ａ以外の八角穴でもよく、多角形状の穴であれば、適宜変更してもよい。
次に、上記実施形態及び別例から把握できる技術的思想について以下に追記する。
In the head 58, the hole into which the rotating part 71 is inserted may be an octagonal hole other than the hexagonal hole 58a, and may be changed as appropriate as long as it is a polygonal hole.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
（イ）前記電極組立体は蓄電装置が備える電極組立体であり、前記蓄電装置は二次電池である。 (A) The electrode assembly is an electrode assembly included in a power storage device, and the power storage device is a secondary battery.
１４…電極組立体、２１…電極としての正極電極、２４…電極としての負極電極、２７…セパレータ、３７…側面、４４…偏平面、５０…製造装置、５１，５２…挟持部材、５１ｂ…雌ねじ孔、５１ｃ，５２ｃ…突出部、５７…ねじ部材としてのボルト、５８…伝達部としての頭部、５８ａ…六角穴、５９…軸部、５９ａ…雄ねじ部、６０，６７，８１…磁性体としての磁石、７０…締結具、８０…ねじ部材及び伝達部としてのナット。 DESCRIPTION OF SYMBOLS 14 ... Electrode assembly, 21 ... Positive electrode as an electrode, 24 ... Negative electrode as an electrode, 27 ... Separator, 37 ... Side surface, 44 ... Flat surface, 50 ... Manufacturing apparatus, 51, 52 ... Holding member, 51b ... Female screw Hole, 51c, 52c ... projecting part, 57 ... bolt as screw member, 58 ... head as transmission part, 58a ... hexagonal hole, 59 ... shaft part, 59a ... male screw part, 60, 67, 81 ... as magnetic body , 70... Fastener, 80... Screw member and nut as a transmission part.
Claims (3)
前記締結具の回転が伝達されて回転する伝達部を有し、
前記伝達部の表面に沿って配置された磁性体を備え、
前記ねじ部材は、前記伝達部としての頭部と、該頭部に一体であり、雄ねじ部を有する軸部とを有するボルトであり、該ボルトの軸方向に沿った前記頭部の先端に、前記締結具の先端部が挿入される六角穴を備え、該六角穴の内側面を全周に亘って取り囲む六角環状の前記磁性体が配置されていることを特徴とするねじ部材。 A resin screw member that is screwed or screwed by a fastener;
A transmission unit that rotates by transmitting rotation of the fastener;
Comprising a magnetic body disposed along the surface of the transmission section ;
The screw member is a bolt having a head as the transmission portion and a shaft portion that is integral with the head and has a male screw portion, and at the tip of the head along the axial direction of the bolt, A screw member comprising a hexagonal hole into which a tip end portion of the fastener is inserted, and the hexagonal annular magnetic body surrounding the inner surface of the hexagonal hole over the entire circumference .
前記電極組立体を積層方向両端の偏平面から挟む一対の金属板製の挟持部材と、
一対の挟持部材間の間隔を固定するねじ部材と、を有し、
前記一対の挟持部材は、前記電極組立体を積層方向両側から挟んだ状態において前記偏平面に交差する前記電極組立体の側面から突出した突出部を有するとともに、該突出部に雌ねじ孔を備え、
前記ねじ部材は、締結具によって螺進又は螺退させる樹脂製のボルトであり、
前記締結具の回転が伝達される頭部と、該頭部に一体であり、前記雌ねじ孔に螺合する雄ねじ部を有する軸部と、前記頭部の表面に沿って配置された磁性体と、を備える電極組立体の製造装置。
An electrode assembly manufacturing apparatus in which electrodes of different polarities are stacked with a separator interposed therebetween,
A pair of metal plate sandwiching members sandwiching the electrode assembly from the flat surfaces at both ends in the stacking direction;
A screw member that fixes a distance between the pair of clamping members;
The pair of clamping members have a protruding portion protruding from a side surface of the electrode assembly that intersects the flat surface in a state where the electrode assembly is sandwiched from both sides in the stacking direction, and includes a female screw hole in the protruding portion,
The screw member is a resin bolt that is screwed or screwed by a fastener,
A head to which the rotation of the fastener is transmitted, a shaft that is integral with the head and has a male screw that is screwed into the female screw hole, and a magnetic body that is disposed along the surface of the head. An apparatus for manufacturing an electrode assembly.
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| JPH02253925A (en) * | 1989-03-29 | 1990-10-12 | Kanagawa Pref Gov | Manufacture of frp bolt and manufacture of prepreg sheet to be used for that |
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