JP5018856B2 - Electrochemical device and manufacturing method thereof - Google Patents
Electrochemical device and manufacturing method thereof Download PDFInfo
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- JP5018856B2 JP5018856B2 JP2009239740A JP2009239740A JP5018856B2 JP 5018856 B2 JP5018856 B2 JP 5018856B2 JP 2009239740 A JP2009239740 A JP 2009239740A JP 2009239740 A JP2009239740 A JP 2009239740A JP 5018856 B2 JP5018856 B2 JP 5018856B2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Description
本発明は、電気化学デバイス及びその製造方法に関するものである。 The present invention relates to an electrochemical device and a manufacturing method thereof.
従来の電気化学デバイスは、アルミニウムからなる外装体中にリチウムイオン電池（ＬＩＢ）や、電気二重層キャパシタ（ＥＤＬＣ）などの電池素体を封入している。すなわち、アルミニウムラミネートからなる外装体内に電池素体を配置し、外装体内には必要に応じて電解液を導入し、外装体の周辺部を封止していた。 In a conventional electrochemical device, a battery element such as a lithium ion battery (LIB) or an electric double layer capacitor (EDLC) is enclosed in an outer package made of aluminum. That is, a battery element body is disposed in an exterior body made of an aluminum laminate, and an electrolyte is introduced into the exterior body as necessary to seal the periphery of the exterior body.
電池素体からは、アノード及びカソードのリードが延びており、それぞれは、外装体の封止部の隙間を抜けて、外部に延びている。また、アルミニウムラミネートの内側には樹脂層が設けられており、封止部を熱圧着することで、封止が行われる。この封止部とリードとの間の構造について、幾つかの研究が行われている。下記特許文献１は、封止部におけるリードに複数の孔を設けることにより、かかる箇所における接着面積を高める工夫がされている。また、下記特許文献２は、封止部におけるリードの幅を狭めることにより、かかる箇所における接着面積を高める工夫がされている。 Anode and cathode leads extend from the battery body, and each extends outside through a gap in the sealing portion of the exterior body. Moreover, the resin layer is provided inside the aluminum laminate, and sealing is performed by thermocompression bonding the sealing portion. Several studies have been conducted on the structure between the sealing portion and the lead. The following Patent Document 1 is devised to provide a plurality of holes in the lead in the sealing portion, thereby increasing the adhesion area at the location. Further, Patent Document 2 below devises a technique for increasing the bonding area at such a location by narrowing the width of the lead in the sealing portion.
しかしながら、時間の経過伴って、内部の液体やガスが漏れたり、リードが短絡するなどの不良品が発生するため、高品質の電気化学デバイスが得られないという問題を発見した。 However, with the passage of time, defective products such as leakage of internal liquids and gases and short-circuiting of leads have occurred, and thus a problem has been found that a high-quality electrochemical device cannot be obtained.
本発明は、このような課題に鑑みてなされたものであり、高品質な電気化学デバイス及びその製造方法を提供することを目的とする。 This invention is made | formed in view of such a subject, and it aims at providing a high quality electrochemical device and its manufacturing method.
上述の課題を解決するため、第１の発明の電気化学デバイスは、外装体内に封入された電池素体と、少なくとも前記外装体の封止部の内側に設けられた樹脂層と、前記電池素体から前記外装体の前記封止部の前記樹脂層間を介して、前記外装体の外部に延びた複数のリードと、を備え、それぞれの前記リードは、前記封止部の位置において、その長手方向に沿って離間した三角形状の複数の切り欠き部を備え、それぞれの切り欠き部の最深部に位置する頂点の角度は６０°〜１５０°であり、複数の前記切り欠き部は、それぞれの前記リードの幅方向両側にそれぞれ設けられ、１つの切り欠き部の前記リードの幅方向の延長線上には、別の切り欠き部が位置していないことを特徴とする。この場合、長手方向に離間した切り欠き部の数が複数であって、各切り欠き部内に樹脂層の樹脂が食い込んでいるので、リードが強固に樹脂層内に埋め込まれることになり、リード長手方向の移動が十分に抑制される。なお、リードの移動は内部の液漏れを生じさせる虞があるため好ましくない。すなわち、微量のリード引き出し量であっても、そこには微小な空隙が生じてしまい、この空隙を通じて、電解液漏れや，大気中の水分の素子内取り込みが起こり、素子の寿命を縮めてしまう。したがって、リード移動が抑制されれば、かかる不具合を抑制し、高品質の電気化学デバイスを提供することができる。 In order to solve the above-described problems, an electrochemical device according to a first aspect of the present invention includes a battery element sealed in an exterior body, a resin layer provided at least inside a sealing portion of the exterior body, and the battery element. A plurality of leads extending from the body to the outside of the exterior body through the resin layer of the sealing portion of the exterior body, and each of the leads has a longitudinal shape at the position of the seal portion. A plurality of triangular notches spaced apart in the direction, and the angle of the vertex located at the deepest part of each notch is 60 ° to 150 °, and the plurality of notches are respectively It is provided respectively on both sides in the width direction of the lead, and another notch portion is not located on an extension line of the notch portion in the width direction of the lead . In this case, since the number of notches spaced apart in the longitudinal direction is plural, and the resin of the resin layer bites into each notch, the lead is firmly embedded in the resin layer, and the length of the lead Directional movement is sufficiently suppressed. Note that the movement of the lead is not preferable because there is a risk of causing internal liquid leakage. In other words, even with a small amount of lead extraction, a minute gap is formed in the lead, and through this gap, electrolyte leakage and intake of moisture in the air into the element occur, reducing the life of the element. . Therefore, if lead movement is suppressed, such a problem can be suppressed and a high-quality electrochemical device can be provided.
また、上記のように、複数の前記切り欠き部は、それぞれの前記リードの幅方向両側にそれぞれ設けられ、１つの切り欠き部の前記リードの幅方向の延長線上には、別の切り欠き部が位置していない。すなわち、切り欠き部は、リード長手方向に沿って、互い違いに配置されている。この場合、切り欠き部の設けられたリード幅を太くすることができるので、リード断線を抑制することが可能である。 Further, as described above, the plurality of cutout portions are provided on both sides in the width direction of the respective leads, and another cutout portion is provided on an extension line of the one cutout portion in the width direction of the lead. not but such is located. That is, the notches are arranged alternately along the lead longitudinal direction. In this case, since the lead width provided with the notch can be increased, lead disconnection can be suppressed.
また、第１の発明の電気化学デバイスの製造方法は、少なくとも前記リードの前記封止部に位置する複数の領域を切り取ることで、前記切り欠き部を形成する工程と、前記切り欠き部を有する前記リードを、前記封止部の前記樹脂層間に配置し、これらを前記外装体とともに熱圧着する工程と、を備えることを特徴とする。これにより、リード長手方向の移動や断線が抑制されたリードを製造することができ、したがって、高品質な電気化学デバイスを提供することができる。 The method for manufacturing an electrochemical device of the first invention includes a step of forming the cutout portion by cutting out at least a plurality of regions located in the sealing portion of the lead, and the cutout portion. And arranging the leads between the resin layers of the sealing portion and thermocompressing them together with the exterior body. Thereby, the lead | read | reed with which the movement and disconnection of the lead longitudinal direction were suppressed can be manufactured, Therefore Therefore, a high quality electrochemical device can be provided.
第２の発明の電気化学デバイスは、外装体内に封入された電池素体と、少なくとも前記外装体の封止部の内側に設けられた樹脂層と、前記電池素体から前記外装体の前記封止部の前記樹脂層間を介して、前記外装体の外部に延びた複数のリードと、を備え、それぞれの前記リードは、前記封止部の位置において、その厚み方向にプレス加工されることで部分的に薄化した複数の薄化部を備えることを特徴とする。この場合、複数の薄化部を備えているので、未加工の領域と加工済みの領域（薄化部）との間に段差が形成され、この段差に、樹脂層が食い込み、リード長手方向の移動が十分に抑制される。 The electrochemical device according to a second aspect of the invention includes a battery body enclosed in an exterior body, a resin layer provided at least inside a sealing portion of the exterior body, and the sealing of the exterior body from the battery body. A plurality of leads extending to the outside of the exterior body through the resin layer of the stopper, and each of the leads is pressed in the thickness direction at the position of the sealing portion. A plurality of thinned portions that are partially thinned are provided. In this case, since a plurality of thinned portions are provided, a step is formed between the unprocessed region and the processed region (thinned portion). The resin layer bites into the step, and the longitudinal direction of the lead Movement is sufficiently suppressed.
また、第２の発明の電気化学デバイスの製造方法は、少なくとも前記リードの前記封止部に位置する複数の領域をプレス加工することで、前記薄化部を形成する工程と、前記薄化部を有する前記リードを、前記封止部の前記樹脂層間に配置し、これらを前記外装体とともに熱圧着する工程と、を備えることを特徴とする。なお、薄化部は打ち抜きして形成した切り欠き部よりも強度が高く、断線しにくい。これにより、リード長手方向の移動や断線が抑制されたリードを製造することができ、したがって、高品質な電気化学デバイスを提供することができる。 In addition, the method for manufacturing an electrochemical device according to the second invention includes a step of forming the thinned portion by pressing a plurality of regions located at least in the sealing portion of the lead, and the thinned portion. A step of disposing the leads having the above-described relationship between the resin layers of the sealing portion and thermocompression bonding them together with the exterior body. Note that the thinned portion has a higher strength than the cutout portion formed by punching, and is difficult to break. Thereby, the lead | read | reed with which the movement and disconnection of the lead longitudinal direction were suppressed can be manufactured, Therefore Therefore, a high quality electrochemical device can be provided.
更に、第３の発明の電気化学デバイスは、外装体内に封入された電池素体と、少なくとも前記外装体の封止部の内側に設けられた樹脂層と、前記電池素体から前記外装体の前記封止部の前記樹脂層間を介して、前記外装体の外部に延びた複数のリードと、を備え、それぞれの前記リードは、前記封止部の位置において、その幅方向に沿って前記リードを横断するようにプレス加工されることで帯状に薄化した薄化部と、前記薄化部に設けられた切り欠き部とを備えることを特徴とする。薄化部の形状はリード厚み方向の内側に向けて凹んで、切り欠き部の設けられた箇所の形状は、リード幅方向の内側に凹んでおり、したがって、リードの長手方向周りの全周にわたって、リードは内側に凹んだ形状を有しており、これらの凹み内に樹脂が食い込むことで、リード長手方向の移動が著しく抑制される。 Furthermore, an electrochemical device according to a third aspect of the present invention includes a battery body enclosed in an exterior body, a resin layer provided at least inside a sealing portion of the exterior body, and the battery body from the battery body. A plurality of leads extending to the outside of the exterior body through the resin layer of the sealing portion, and each of the leads along the width direction at the position of the sealing portion. It is characterized by comprising a thinned portion that has been thinned into a belt-like shape by being pressed so as to cross, and a notch provided in the thinned portion. The shape of the thinned portion is recessed toward the inner side in the lead thickness direction, and the shape of the portion provided with the notch is recessed toward the inner side in the lead width direction, and therefore, over the entire circumference around the longitudinal direction of the lead. The lead has a shape recessed inward, and the resin bites into these recesses, so that the movement in the longitudinal direction of the lead is remarkably suppressed.
また、第３の発明の電気化学デバイスの製造方法は、少なくとも前記リードの前記封止部に位置する複数の領域をプレス加工することで、前記薄化部を形成する工程と、前記薄化部から一部の領域を切り取ることによって、前記切り欠き部を形成する工程と、前記薄化部及び前記切り欠き部を有する前記リードを、前記封止部の前記樹脂層間に配置し、これらを前記外装体とともに熱圧着する工程と、を備えることを特徴とする。これにより、リード長手方向の移動や断線が抑制されたリードを製造することができ、したがって、高品質な電気化学デバイスを提供することができる。 In addition, the method for manufacturing an electrochemical device according to a third aspect of the invention includes the step of forming the thinned portion by pressing a plurality of regions positioned at least in the sealing portion of the lead, and the thinned portion. A step of forming the cutout portion by cutting out a part of the region, and arranging the leads having the thinned portion and the cutout portion between the resin layers of the sealing portion, And a step of thermocompression bonding with the exterior body. Thereby, the lead | read | reed with which the movement and disconnection of the lead longitudinal direction were suppressed can be manufactured, Therefore Therefore, a high quality electrochemical device can be provided.
本発明によれば、高品質な電気化学デバイスを提供することができる。 According to the present invention, a high-quality electrochemical device can be provided.
以下、実施の形態に係る電気化学デバイスについて説明する。なお、説明において、同一要素には、同一符号を用い、重複する説明は省略する。 Hereinafter, the electrochemical device according to the embodiment will be described. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted.
図１は電気化学デバイスの斜視図であり、図２は図１に示した電気化学デバイスのＩＩ−ＩＩ矢印断面図、図３は、第１実施形態に係る電気化学デバイスの封止部近傍の拡大斜視図である。なお、これらの図では、図示の如く、ＸＹＺ三次元直交座標系が設定されている。 FIG. 1 is a perspective view of an electrochemical device, FIG. 2 is a cross-sectional view of the electrochemical device shown in FIG. 1, taken along the line II-II, and FIG. 3 is a view of the vicinity of the sealing portion of the electrochemical device according to the first embodiment. It is an expansion perspective view. In these figures, an XYZ three-dimensional orthogonal coordinate system is set as shown.
この電気化学デバイスは、電気二重層キャパシタ（ＥＤＬＣ）であり、金属フィルムＭ１，Ｍ２を含む外装体Ｐと、外装体Ｐ内に封入された電池素体２０（図２参照）と、少なくとも外装体Ｐの封止部（トップシール部）Ｐ１の内側に設けられた樹脂層Ｒ１，Ｒ２と、電池素体２０から外装体Ｐの封止部Ｐ１の樹脂層Ｒ１，Ｒ２間を介して、外装体Ｐの外部に延びたリードＡ１，Ｋ１とを備えている。リードＡ１，Ｋ１は、Ｘ軸方向に沿って延びており、幅方向はＹ軸、厚み方向はＺ軸に一致する。樹脂層Ｒ１，Ｒ２は、ポリプロピレンなどの高分子フィルムからなる。 This electrochemical device is an electric double layer capacitor (EDLC), and includes an outer package P including metal films M1 and M2, a battery body 20 (see FIG. 2) sealed in the outer package P, and at least an outer package. The exterior body is provided between the resin layers R1 and R2 provided inside the P sealing portion (top seal portion) P1 and the resin layers R1 and R2 of the sealing portion P1 of the exterior body P from the battery body 20. Leads A1 and K1 extending outside P are provided. The leads A1 and K1 extend along the X-axis direction, the width direction coincides with the Y-axis, and the thickness direction coincides with the Z-axis. The resin layers R1 and R2 are made of a polymer film such as polypropylene.
樹脂層Ｒ１，Ｒ２は、金属フィルムＭ１，Ｍ２の内側の全面に貼り付けられているが、これらは、長方形の外装体Ｐの四辺周囲の封止部Ｐ１，Ｐ２，Ｐ３，Ｐ４に位置する箇所の金属フィルムＭ１，Ｍ２に設けられていてもよい。これらの封止部Ｐ１，Ｐ２，Ｐ３，Ｐ４は、熱圧着によって封止されている。外装体Ｐの四辺の封止部Ｐ１，Ｐ２，Ｐ３，Ｐ４に囲まれた中央領域Ｐ０内部には、電池素体２０が配置される。アノードとしてのリードＡ１と、カソードとしてのリードＫ１との間には、電圧を印加して電池素体２０を充電することもでき、また、電池素体２０に充電された電力を、これらから取り出すこともできる。 The resin layers R1 and R2 are affixed to the entire inner surface of the metal films M1 and M2, and these are locations located at the sealing portions P1, P2, P3, and P4 around the four sides of the rectangular exterior body P. The metal films M1 and M2 may be provided. These sealing parts P1, P2, P3, and P4 are sealed by thermocompression bonding. The battery body 20 is disposed inside the central region P0 surrounded by the sealing portions P1, P2, P3, and P4 on the four sides of the exterior body P. The battery body 20 can be charged by applying a voltage between the lead A1 as the anode and the lead K1 as the cathode, and the power charged in the battery body 20 is taken out from these. You can also.
図２を参照し、封止部Ｐ１におけるリードＡ１（Ｋ１）の厚みをＺ０（なお、封止部をプレス処理した場合には厚みはＺ１となる）、樹脂層Ｒ１，Ｒ２全体の厚みをＺ２、外装体全体の厚みをＺ３とする。 Referring to FIG. 2, the thickness of the lead A1 (K1) in the sealing portion P1 is Z0 (the thickness is Z1 when the sealing portion is pressed), and the total thickness of the resin layers R1 and R2 is Z2. The thickness of the entire exterior body is Z3.
また、図３に示す電池素体２０の構造としては、無数のものが考えられる。本例では、アノード（正極）側の電極として、アルミニウムや銅などの金属箔からなる集電体１と、活性炭質構造体などからなる分極性電極２を結合したものを用いる。また、カソード（負極）側の電極として、アルミニウムなどの金属箔からなる集電体５と、活性炭質構造体などからなる分極性電極４とを結合したものを用いる。また、これらの正極と負極との間にはセパレータ３が介在している。もちろん、複数の電池素体を積層させてもよいが、ここでは、簡略化のため、１つの電池素体のみが収納された例を示している。 Further, the battery body 20 shown in FIG. 3 may have an infinite number of structures. In this example, an anode (positive electrode) side electrode in which a current collector 1 made of a metal foil such as aluminum or copper and a polarizable electrode 2 made of an activated carbon structure are combined is used. In addition, as the cathode (negative electrode) side electrode, a combination of a current collector 5 made of a metal foil such as aluminum and a polarizable electrode 4 made of an activated carbon structure is used. A separator 3 is interposed between the positive electrode and the negative electrode. Of course, a plurality of battery element bodies may be stacked, but here, for simplification, an example in which only one battery element body is accommodated is shown.
分極性電極２，４は、多孔質材料からなり、活性炭にバインダー樹脂を混ぜて製造する。バインダー樹脂としては、ポリテトラフルオロエチレンなどのフッ素を含む高分子化合物、又は、スチレンブタジエンゴムのようなゴム系の高分子化合物が挙げられる。必要に応じてカーボンブラック、カーボンナノチューブ、又は黒鉛の微粒子、微細繊維を導電助剤として配合することもできる。 The polarizable electrodes 2 and 4 are made of a porous material, and are produced by mixing activated carbon with a binder resin. Examples of the binder resin include fluorine-containing polymer compounds such as polytetrafluoroethylene, and rubber-based polymer compounds such as styrene butadiene rubber. If necessary, carbon black, carbon nanotubes, fine particles of graphite, or fine fibers can be blended as a conductive aid.
集電体１，５としては、銅箔やアルミニウム箔の表面をエッチングによって表面を荒く加工したものを使用することができる。なお、電極製造方法として、活性炭に導電補助剤とバインダーを加えてシート状にして集電極に接着する方法のほか、活性炭をスラリー状にして集電極に塗工する方法なども無数に存在する。 As the current collectors 1 and 5, it is possible to use a copper foil or aluminum foil whose surface is roughened by etching. As an electrode manufacturing method, there are innumerable methods such as adding a conductive auxiliary agent and a binder to activated carbon to form a sheet and adhering to the collecting electrode, and a method of applying activated carbon to the collecting electrode in a slurry state.
セパレータ３は、例えば重量比１０％以上のポリオレフィン系樹脂を含有した不織布または多孔質フィルムからなる。ポリオレフィン系樹脂の軟化点温度以上の温度環境下で、一対の分極性電極に圧力を加えることにより、分極性電極とセパレータとは接着することもできる。セパレータとして、セルロース不織布やアラミド繊維の不織布を用いることもできる。 The separator 3 is made of, for example, a nonwoven fabric or a porous film containing a polyolefin resin having a weight ratio of 10% or more. The polarizable electrode and the separator can be bonded together by applying pressure to the pair of polarizable electrodes in a temperature environment equal to or higher than the softening point temperature of the polyolefin resin. A cellulose nonwoven fabric or an aramid fiber nonwoven fabric can also be used as the separator.
外装体Ｐ内に充填される電解液ＬＱとしては、水溶液系と有機系のものが知られている。有機系の電解液の溶媒としては、プロピレンカーボネート、アセトニトリルなどあり、溶質としては、アンモニウム塩、アミン塩、或いはアミジン塩などが知られている。 As the electrolytic solution LQ filled in the outer package P, an aqueous solution type and an organic type are known. Examples of the solvent for the organic electrolyte include propylene carbonate and acetonitrile, and examples of the solute include ammonium salt, amine salt, and amidine salt.
また、図３に示すように、正極及び負極の集電体１，５は、リードＡ１，Ｋ１にそれぞれ結合されている。この結合位置は、図のように外装体内部であってもよいが、封止部Ｐ１の位置とすることもできる。なお、これらは一体の金属箔からなることとしてもよい。リードＡ１，Ｋ１には、樹脂が内部に嵌まり込むような形状に加工された加工部７が設けられ、加工部７の長手方向前後には未加工部が存在している。この加工部７は、平坦で平面形状が三角形の押圧面とこれに対向して嵌り合う三角形開口を有する打ち抜き機内に、リードＡ１，Ｋ１を挿入し、これらの一部を三角形の押圧面で打ち抜くことで形成される。封止部Ｐ１などはプレス機で熱圧着加工する。 As shown in FIG. 3, the positive and negative electrode current collectors 1 and 5 are coupled to leads A1 and K1, respectively. This coupling position may be inside the exterior body as shown in the figure, but can also be the position of the sealing portion P1. These may be made of an integral metal foil. The leads A1 and K1 are provided with a processed portion 7 processed into a shape in which the resin fits inside, and unprocessed portions exist before and after the processed portion 7 in the longitudinal direction. This processed portion 7 is formed by inserting leads A1 and K1 into a punching machine having a flat pressing surface having a triangular shape and a triangular opening that is fitted opposite to the pressing surface, and punching a part of them with the triangular pressing surface. Is formed. Sealing part P1 etc. are thermocompression-bonded with a press.
図４は、第１実施形態に係るリードの加工部の拡大斜視図である。 FIG. 4 is an enlarged perspective view of the processed portion of the lead according to the first embodiment.
第１実施形態の電気化学デバイスでは、それぞれのリードＡ１(Ｋ１)は、封止部Ｐ１の位置において（図３参照）、リードＡ１（Ｋ１）の長手方向（Ｘ軸）に沿って離間した複数の切り欠き部ＤＰ１，ＤＰ２（ＤＰ３，ＤＰ４）を備えている。これらの切り欠き部ＤＰ１〜ＤＰ４の形状は、それぞれ三角形状であり、リードの側面から三角形の頂点（最深部）までの長さ（切り欠き部の深さ）はＹ２、リード側面における切り欠き部の最大離隔距離（三角形の底辺長さ）はＸ２である。この場合、長手方向に離間した切り欠き部ＤＰ１，ＤＰ２（ＤＰ３，ＤＰ４）の数が複数であって、各切り欠き部内に樹脂層の樹脂が食い込んでいるので、リードが強固に樹脂層内に埋め込まれることになり、リード長手方向の移動が十分に抑制される。 In the electrochemical device of the first embodiment, each lead A1 (K1) has a plurality of leads A1 (K1) spaced apart along the longitudinal direction (X axis) at the position of the sealing portion P1 (see FIG. 3). Notch portions DP1 and DP2 (DP3 and DP4). Each of the cutout portions DP1 to DP4 has a triangular shape, the length from the side surface of the lead to the apex (the deepest portion) of the triangle (the depth of the cutout portion) is Y2, and the cutout portion on the side surface of the lead The maximum separation distance (the base length of the triangle) is X2. In this case, the number of the notches DP1, DP2 (DP3, DP4) spaced apart in the longitudinal direction is plural, and the resin of the resin layer bites into each notch, so that the lead is firmly in the resin layer. As a result, the movement in the lead longitudinal direction is sufficiently suppressed.
切り欠き部ＤＰ１とＤＰ２とは、Ｘ軸方向に沿って離間しており、それぞれの重心（あるいは頂点）を通るＹ軸に平行な線分をＸＰ１，ＸＰ２とすると、残りの切り欠き部ＤＰ３，ＤＰ４の重心（あるいは頂点）は、それぞれ線分ＸＰ１、ＸＰ２上に位置している。すなわち、一対の切り欠き部ＤＰ１，ＤＰ３がリード幅方向（Ｙ軸）に沿って対向しており、一対の切り欠き部ＤＰ２，ＤＰ４がリード幅方向（Ｙ軸）に沿って対向している。 The notches DP1 and DP2 are separated along the X-axis direction, and if the line segments parallel to the Y-axis passing through the respective centroids (or vertices) are XP1 and XP2, the remaining notches DP3 and DP2 are separated. The centers of gravity (or vertices) of DP4 are located on line segments XP1 and XP2, respectively. That is, the pair of notches DP1 and DP3 face each other along the lead width direction (Y axis), and the pair of notches DP2 and DP4 face each other along the lead width direction (Y axis).
なお、図３に示した封止部Ｐ１のＸ軸方向の寸法Ｘ２１は、図４に示す加工部７のＸ軸方向の寸法（切り欠き部のＸ軸方向の最大離隔距離）よりも、若干長く設定されている。図３の封止部Ｐ１には全領域に図２の樹脂層Ｒ１，Ｒ２が設けられているので、加工部７の切り欠き部ＤＰ１〜ＤＰ４内に、樹脂層Ｒ１，Ｒ２が食い込むこととなり、リードＡ１（Ｋ１）のＸ軸方向の移動が規制される。リードＡ１（Ｋ１）の幅Ｙ１は、例えば３．５ｍｍに設定される。 The dimension X21 in the X-axis direction of the sealing part P1 shown in FIG. 3 is slightly larger than the dimension in the X-axis direction of the processed part 7 shown in FIG. 4 (the maximum separation distance in the X-axis direction of the notch part). It is set long. Since the resin layer R1 and R2 of FIG. 2 are provided in the entire region in the sealing portion P1 of FIG. 3, the resin layers R1 and R2 bite into the notches DP1 to DP4 of the processed portion 7, The movement of the lead A1 (K1) in the X-axis direction is restricted. The width Y1 of the lead A1 (K1) is set to 3.5 mm, for example.
図５は、第２実施形態に係る電気化学デバイスの封止部近傍の拡大斜視図であり、図６は、第２実施形態に係るリードの加工部の拡大斜視図である。
この加工部７では、図４に示したものと比較して、切り欠き部ＤＰ１とＤＰ４が省略されており、他の構成は、第１実施形態のものと同一である。この構成の場合、複数の切り欠き部ＤＰ３、ＤＰ２は、それぞれのリードＡ１（Ｋ１）の幅方向両側にそれぞれ設けられ、１つの切り欠き部ＤＰ３（ＤＰ２）のリードの幅方向の延長線ＸＰ１（ＸＰ２）上には、別の切り欠き部が位置していない。すなわち、切り欠き部ＤＰ３，ＤＰ２は、リード長手方向（Ｘ軸）に沿って、互い違いに配置されている。この場合、第１実施形態のものよりも、切り欠き部の設けられたリード幅を太くすることができるので、リード断線を抑制し、かつ、抵抗増加を抑制することが可能である。
FIG. 5 is an enlarged perspective view of the vicinity of the sealing portion of the electrochemical device according to the second embodiment, and FIG. 6 is an enlarged perspective view of the processed portion of the lead according to the second embodiment.
In the processing portion 7, the notches DP1 and DP4 are omitted as compared with the one shown in FIG. 4, and other configurations are the same as those in the first embodiment. In this configuration, the plurality of notches DP3 and DP2 are provided on both sides in the width direction of the respective leads A1 (K1), and an extension line XP1 (in the width direction of the lead of one notch DP3 (DP2)) ( No other notch is located on XP2). That is, the notches DP3 and DP2 are alternately arranged along the lead longitudinal direction (X axis). In this case, since the lead width provided with the notch can be made thicker than that of the first embodiment, it is possible to suppress lead disconnection and to suppress increase in resistance.
第１又は第２実施形態の電気化学デバイスの製造方法は、少なくともリードＡ１（Ｋ１）の封止部Ｐ１（図１参照）に位置する複数の領域を切り取ることで、切り欠き部ＤＰ１〜ＤＰ４（ＤＰ３，ＤＰ２）を形成する工程と、これらの切り欠き部を有するリードＡ１（Ｋ１）を、封止部Ｐ１の樹脂層Ｒ１，Ｒ２（図２参照）間に配置し、これらを外装体とともに熱圧着する工程とを備えている。これにより、Ｘ軸方向の移動や断線が抑制されたリードを製造することができ、したがって、高品質な電気化学デバイスを提供することができる。 In the method for manufacturing an electrochemical device according to the first or second embodiment, at least a plurality of regions located in the sealing portion P1 (see FIG. 1) of the lead A1 (K1) are cut out, so that the notches DP1 to DP4 ( DP3, DP2) and the lead A1 (K1) having these notches are disposed between the resin layers R1, R2 (see FIG. 2) of the sealing portion P1, and these are heated together with the exterior body. And a step of crimping. Thereby, the lead | read | reed with which the movement and disconnection of the X-axis direction were suppressed can be manufactured, Therefore Therefore, a high quality electrochemical device can be provided.
具体的には、例えば、幅３．５ｍｍ、厚さ１００μｍ，長さ３０ｍｍのＡｌ箔のリードを用意し、熱圧着予定の領域（５ｍｍ幅）よりも狭い領域内に、打ち抜き等により加工部７を形成し、その後、リード上下面に０．４Ｐａの圧力をかけて、バリを除去する。このリードを電池素体の集電体に結合させ、しかる後、封止部に２．９４×１０５Ｐａの圧力をかけて、１８０℃、７秒間の熱圧着を行う。各封止部Ｐ１〜Ｐ４を熱圧着することで、電気化学デバイスが完成する。なお、全部の封止部の熱圧着の完了前に、外装体内に電解液を導入しておく。 Specifically, for example, an Al foil lead having a width of 3.5 mm, a thickness of 100 μm, and a length of 30 mm is prepared, and a processed portion 7 is formed by punching or the like in an area narrower than an area scheduled for thermocompression bonding (5 mm width). Then, a pressure of 0.4 Pa is applied to the upper and lower surfaces of the lead to remove burrs. This lead is bonded to the current collector of the battery body, and then a pressure of 2.94 × 10 5 Pa is applied to the sealing portion to perform thermocompression bonding at 180 ° C. for 7 seconds. An electrochemical device is completed by thermocompression-bonding each sealing part P1-P4. In addition, before completion of thermocompression bonding of all the sealing portions, an electrolytic solution is introduced into the exterior body.
図７は、第３実施形態に係る電気化学デバイスの封止部近傍の拡大斜視図であり、図８は、第３実施形態に係るリードの加工部の拡大斜視図である。 FIG. 7 is an enlarged perspective view of the vicinity of the sealing portion of the electrochemical device according to the third embodiment, and FIG. 8 is an enlarged perspective view of the processed portion of the lead according to the third embodiment.
第３実施形態の電気化学デバイスでは、それぞれのリードは、封止部Ｐ１（図１参照）の位置において、その厚み方向にプレス加工されることで部分的に薄化した複数の薄化部ＤＰ１，ＤＰ３を備えている。この場合、複数の薄化部ＤＰ１，ＤＰ３を備えているので、未加工の領域と加工済みの領域（薄化部ＤＰ１，ＤＰ３）との間に段差が形成され、この段差に、樹脂層Ｒ１，Ｒ２(図２参照)が食い込み、リード長手方向（Ｘ軸方向）の移動が十分に抑制される。これらの薄化部ＤＰ１，ＤＰ３は、Ｙ軸に平行な線分ＸＰ１上に沿って整列しており、形状は三角形であり、それぞれの頂点が対向している。 In the electrochemical device of the third embodiment, each lead has a plurality of thinned portions DP1 partially thinned by pressing in the thickness direction at the position of the sealing portion P1 (see FIG. 1). , DP3. In this case, since the plurality of thinned portions DP1 and DP3 are provided, a step is formed between the unprocessed region and the processed region (thinned portions DP1 and DP3), and the resin layer R1 is formed at the step. , R2 (see FIG. 2) bite in and the movement in the lead longitudinal direction (X-axis direction) is sufficiently suppressed. These thinned portions DP1 and DP3 are aligned along a line XP1 parallel to the Y axis, the shape is a triangle, and the apexes thereof are opposed to each other.
薄化部ＤＰ１，ＤＰ３の厚みをＺ１とすると、Ｚ１はＺ０よりも小さい。他の構造は、上記第１実施形態と同様である。なお、リードＡ１（Ｋ１）の厚みＺ１、樹脂層Ｒ１，Ｒ２の全厚みＺ２は、３０％≦Ｚ１／Ｚ２≦６０％の関係を満たすことが好ましい。また、厚みＺ１は、３０μｍ≦Ｚ１≦２００μｍを満たすことが好ましい。これらの場合、下限を下回る場合には断線する傾向があり、上限を上回る場合にはリード表面を自然に覆うことが難しくなる傾向にある。すなわち、リード表面を無理なく覆うことができる上、熱圧着時（１８０℃）にちぎれない強度を保つことができる（リードが破断しない）という効果がある。なお、Ｚ０の値は、例えば１００μｍとし、Ｚ１の値は例えば８０μｍとする。 When the thickness of the thinned portions DP1 and DP3 is Z1, Z1 is smaller than Z0. Other structures are the same as those in the first embodiment. The thickness Z1 of the lead A1 (K1) and the total thickness Z2 of the resin layers R1 and R2 preferably satisfy the relationship of 30% ≦ Z1 / Z2 ≦ 60%. The thickness Z1 preferably satisfies 30 μm ≦ Z1 ≦ 200 μm. In these cases, if the lower limit is not reached, there is a tendency to break, and if the upper limit is exceeded, it tends to be difficult to naturally cover the lead surface. That is, there is an effect that the lead surface can be covered without difficulty and the strength that cannot be broken at the time of thermocompression bonding (180 ° C.) can be maintained (the lead does not break). The value of Z0 is, for example, 100 μm, and the value of Z1 is, for example, 80 μm.
第３実施形態の電気化学デバイスの製造方法は、少なくともリードＡ１(Ｋ１)の封止部Ｐ１に位置する複数の領域をプレス加工することで、薄化部ＤＰ１，ＤＰ３を形成する工程と、薄化部ＤＰ１，ＤＰ３を有するリードＡ１（Ｋ１）を、封止部Ｐ１の樹脂層Ｒ１，Ｒ２間に配置し、これらを外装体とともに熱圧着する工程とを備えている。なお、薄化部ＤＰ１，ＤＰ３は打ち抜きして形成した切り欠き部よりも強度が高く、断線しにくい。これにより、リード長手方向（Ｘ軸）の移動や断線が抑制されたリードを製造することができ、したがって、高品質な電気化学デバイスを提供することができる。 The electrochemical device manufacturing method of the third embodiment includes a step of forming thinned portions DP1 and DP3 by pressing at least a plurality of regions located in the sealing portion P1 of the lead A1 (K1), A lead A1 (K1) having the forming portions DP1 and DP3 is disposed between the resin layers R1 and R2 of the sealing portion P1, and these are thermocompression bonded together with the exterior body. Note that the thinned portions DP1 and DP3 have higher strength than the notched portions formed by punching, and are not easily disconnected. Thereby, the lead | read | reed with which the movement and disconnection of the lead longitudinal direction (X-axis) were suppressed can be manufactured, Therefore A high quality electrochemical device can be provided.
具体的には、例えば、幅３．５ｍｍ、厚さ１００μｍ、長さ３０ｍｍのＡｌ箔のリードを用意し、熱圧着予定の領域よりも狭い領域内に、プレス加工（例えば、圧力は３．９２×１０５Ｐａ）により加工部７を形成し、その後、リード上下面に５．０×１０５Ｐａの圧力をかけて、バリを除去する。このリードを電池素体の集電体に結合させ、しかる後、封止部に２．９４×１０５Ｐａの圧力をかけて、１８０℃、７秒間の熱圧着を行う。各封止部Ｐ１〜Ｐ４を熱圧着することで、電気化学デバイスが完成する。なお、全部の封止部の熱圧着の完了前に、外装体内に電解液を導入しておく。 Specifically, for example, an Al foil lead having a width of 3.5 mm, a thickness of 100 μm, and a length of 30 mm is prepared, and press working (for example, the pressure is 3.92) in a region narrower than a region to be thermocompression bonded. The processed portion 7 is formed by × 10 5 Pa), and then a pressure of 5.0 × 10 5 Pa is applied to the upper and lower surfaces of the lead to remove burrs. This lead is bonded to the current collector of the battery body, and then a pressure of 2.94 × 10 5 Pa is applied to the sealing portion to perform thermocompression bonding at 180 ° C. for 7 seconds. An electrochemical device is completed by thermocompression-bonding each sealing part P1-P4. In addition, before completion of thermocompression bonding of all the sealing portions, an electrolytic solution is introduced into the exterior body.
図９は、第４実施形態に係る電気化学デバイスの封止部近傍の拡大斜視図であり、図１０は、第４実施形態に係るリードの加工部の拡大斜視図である。 FIG. 9 is an enlarged perspective view of the vicinity of the sealing portion of the electrochemical device according to the fourth embodiment, and FIG. 10 is an enlarged perspective view of the processed portion of the lead according to the fourth embodiment.
第４実施形態の電気化学デバイスでは、それぞれのリードＡ１（Ｋ１）は、封止部Ｐ１（図１参照）の位置において、その幅方向に沿ってリードＡ１（Ｋ１）を横断するようにプレス加工される(Ｘ軸方向寸法Ｘ１)ことで帯状に薄化した薄化部（寸法Ｘ１×Ｙ１の領域であり、上面７Ａと下面７Ｂとの間の領域）ＤＰと、薄化部ＤＰに設けられた切り欠き部ＤＰ１，ＤＰ３とを備えている。薄化部ＤＰの形状はリード厚み方向（Ｚ軸方向）の内側に向けて凹んでおり、切り欠き部ＤＰ１，ＤＰ３の設けられた箇所の形状は、リード幅方向（Ｙ軸方向）の内側に凹んでおり、したがって、リードＡ１（Ｋ１）の長手方向周りの全周にわたって、リードＡ１(Ｋ１)は内側に凹んだ形状を有しており、これらの凹み内に樹脂層Ｒ１，Ｒ２（図２参照）の樹脂が食い込むことで、リード長手方向の移動が著しく抑制される。切り欠き部ＤＰ１，ＤＰ３自体の構造は、第１実施形態と同一である。また、寸法Ｚ１とＺ０は、上述の関係を満たすことが好ましい。他の構成は、第１実施形態と同一である。 In the electrochemical device of the fourth embodiment, each lead A1 (K1) is pressed so as to cross the lead A1 (K1) along the width direction at the position of the sealing portion P1 (see FIG. 1). (X-axis direction dimension X1) provided in the thinned portion DP (the region of the dimension X1 × Y1, which is a region between the upper surface 7A and the lower surface 7B) DP thinned into a strip shape. And notches DP1 and DP3. The shape of the thinned portion DP is recessed toward the inside of the lead thickness direction (Z-axis direction), and the shape of the portion where the notches DP1 and DP3 are provided is inside the lead width direction (Y-axis direction). Therefore, the lead A1 (K1) has a shape recessed inward over the entire circumference of the lead A1 (K1) in the longitudinal direction, and the resin layers R1, R2 (FIG. 2) are formed in these recesses. The resin in the longitudinal direction of the lead is remarkably suppressed. The structure of the notches DP1 and DP3 itself is the same as that of the first embodiment. Moreover, it is preferable that the dimensions Z1 and Z0 satisfy the above-described relationship. Other configurations are the same as those of the first embodiment.
また、第４実施形態の電気化学デバイスの製造方法は、少なくともリードＡ１（Ｋ１）の封止部Ｐ１（図１参照）に位置する複数の領域をプレス加工することで、帯状の薄化部ＤＰを形成する工程と、薄化部ＤＰから一部の領域を切り取ることによって、切り欠き部ＤＰ１，ＤＰ３を形成する工程と、薄化部ＤＰ及び切り欠き部ＤＰ１，ＤＰ３を有するリードＡ１（Ｋ１）を、封止部Ｐ１の樹脂層Ｒ１，Ｒ２(図２参照)間に配置し、これらを外装体とともに熱圧着する工程とを備えている。これにより、リード長手方向の移動や断線が抑制されたリードを製造することができ、したがって、高品質な電気化学デバイスを提供することができる。 Moreover, the manufacturing method of the electrochemical device of 4th Embodiment presses the several area | region located in the sealing part P1 (refer FIG. 1) of lead A1 (K1) at least, and becomes strip | belt-shaped thinning part DP. Forming a notch DP1, DP3 by cutting a part of the region from the thinned portion DP, and a lead A1 (K1) having the thinned portion DP and the notched portions DP1, DP3. Is disposed between the resin layers R1 and R2 (see FIG. 2) of the sealing portion P1, and these are thermocompression bonded together with the exterior body. Thereby, the lead | read | reed with which the movement and disconnection of the lead longitudinal direction were suppressed can be manufactured, Therefore Therefore, a high quality electrochemical device can be provided.
具体的には、例えば、幅３．５ｍｍ、厚さ１００μｍ、長さ３０ｍｍのＡｌ箔のリードを用意し、熱圧着予定の領域よりも狭い領域内に、まず、上記のプレス加工（例えば、圧力は３．９２×１０５Ｐａ）を行い、続いて、切り欠き部用の打ち抜き加工を行うことで、加工部７を形成し、その後、リード上下面に５．０×１０５Ｐａの圧力をかけて、バリを除去する。このリードを電池素体の集電体に結合させ、しかる後、封止部に２．９４×１０５Ｐａの圧力をかけて、１８０℃、７秒間の熱圧着を行う。各封止部Ｐ１〜Ｐ４を熱圧着することで、電気化学デバイスが完成する。なお、全部の封止部の熱圧着の完了前に、外装体内に電解液を導入しておく。 Specifically, for example, a lead made of an Al foil having a width of 3.5 mm, a thickness of 100 μm, and a length of 30 mm is prepared. 3.92 × 10 5 Pa) followed by punching for the notch to form the processed portion 7 and then apply a pressure of 5.0 × 10 5 Pa on the upper and lower surfaces of the lead. To remove burrs. This lead is bonded to the current collector of the battery body, and then a pressure of 2.94 × 10 5 Pa is applied to the sealing portion to perform thermocompression bonding at 180 ° C. for 7 seconds. An electrochemical device is completed by thermocompression-bonding each sealing part P1-P4. In addition, before completion of thermocompression bonding of all the sealing portions, an electrolytic solution is introduced into the exterior body.
なお、第１〜第４実施形態のリードを実施例１〜実施例４として特性を測定した。なお、初期リードの材料はアルミニウム、寸法は幅３．５ｍｍ、厚さ１００μｍ、長さ３０ｍｍであり、圧力と樹脂材料は上述の例の通りである。電池素体は、アルミニウムラミネート箔、活性炭電極／アルミニウム集電箔、セルロースセパレータ、有機系電解液から構成し、電解液は、ＴＥＭＡ・ＢＦ４（テトラフルオロホウ酸トリエチルメチルアンモニウム／ＡＮ（アセトニトリル）溶液であり、７０℃、２．５Ｖ、１０００時間印加という条件の信頼性試験前後の素子重量（液量）の変化率を測定した。比較例１は、第１実施形態において、加工部を設けないものとし、比較例２は、第３実施形態において、薄化部を貫通したものとした。 The characteristics of the leads of the first to fourth embodiments were measured as Examples 1 to 4. The material of the initial lead is aluminum, the dimensions are 3.5 mm in width, 100 μm in thickness, and 30 mm in length, and the pressure and the resin material are as described above. Battery element is aluminum laminate foil, activated carbon electrode / aluminum current collector foil, cellulose separator, composed of an organic electrolyte, electrolyte, TEMA · BF 4 (tetrafluoroborate triethylmethylammonium / AN (acetonitrile) solution The change rate of the element weight (liquid amount) before and after the reliability test under the conditions of application at 70 ° C., 2.5 V, and 1000 hours was measured Comparative Example 1 was not provided with a processing part in the first embodiment. In Comparative Example 2, the thinned portion was penetrated in the third embodiment.
リードの抵抗は、室温（２５℃）において、四端子法を用いて測定した。リードの破断強度は、室温（２５℃）において、リード単体の破断強度を試験装置（島津製作所製の引張試験・圧縮試験機：ＥＺＴｅｓｔ）を用いて測定した。なお、引張（引き抜け）強度は、室温（２５℃）において、熱圧着幅を５．０ｍｍとし、上記試験装置（ＥＺＴｅｓｔ）によって測定した。製品の最終歩留は、電解液を注液した後、充放電可能であって、液漏れ及びショートがないものを、良品として判断した。 The resistance of the lead was measured using a four-terminal method at room temperature (25 ° C.). The break strength of the lead was measured at room temperature (25 ° C.) using a test apparatus (a tensile test / compression tester: EZTest manufactured by Shimadzu Corporation). The tensile (pulling-out) strength was measured with the above test apparatus (EZTest) at room temperature (25 ° C.) with a thermocompression bonding width of 5.0 mm. The final yield of the product was determined as a non-defective product that could be charged / discharged after the electrolyte solution was injected and had no liquid leakage or short circuit.
測定したリードの特性は、以下の通りである。
また、比較例１の評価点数を１０点とした場合に、比較例２及び実施例１〜４の評価点数を比例計算で求め、これらを性能指数として得点化した結果は、以下の通りである
上述のように、実施例のリードは、その断面積の低下から、わずかに抵抗増加するものの、引き抜け強度の増加により、信頼性が格段に上昇するという観点から、実施例１〜４に係る電気化学デバイスが、比較例１，２のものよりも格段に優れている旨が判明した。なお、上述の薄化部又は切り欠き部ＤＰ１〜ＤＰ４の平面形状は、三角形などの多角形が好ましいが、別の形状とすることも可能である。三角形の場合には、最深部に位置する頂点の角度は、ＸＹ平面内において、６０°〜１５０°が、引きちぎれ強度の確保（鋭角の場合切れやすい）という観点から好ましい。 As described above, the lead of the example has a slight increase in resistance due to a decrease in its cross-sectional area, but from the viewpoint that the reliability is remarkably increased due to an increase in pull-out strength, according to Examples 1 to 4. It was found that the electrochemical device was much better than those of Comparative Examples 1 and 2. In addition, although the planar shape of the above-mentioned thin part or notch part DP1-DP4 is a polygon, such as a triangle, it can also be set as another shape. In the case of a triangle, the angle of the vertex located at the deepest part is preferably 60 ° to 150 ° in the XY plane from the viewpoint of ensuring tearing strength (easy to cut in the case of an acute angle).
１０…電気化学デバイス、Ｐ…外装体、Ｍ１，Ｍ２…金属フィルム、Ｒ１，Ｒ２…樹脂層、Ａ１，Ｋ１…リード、２０…電池素体、ＬＱ…電解液、Ｐ１，Ｐ２，Ｐ３，Ｐ４…封止部。
DESCRIPTION OF SYMBOLS 10 ... Electrochemical device, P ... Exterior body, M1, M2 ... Metal film, R1, R2 ... Resin layer, A1, K1 ... Lead, 20 ... Battery body, LQ ... Electrolyte, P1, P2, P3, P4 ... Sealing part.
Claims (2)
少なくとも前記外装体の封止部の内側に設けられた樹脂層と、
前記電池素体から前記外装体の前記封止部の前記樹脂層間を介して、前記外装体の外部に延びた複数のリードと、
を備え、
それぞれの前記リードは、前記封止部の位置において、その長手方向に沿って離間した三角形状の複数の切り欠き部を備え、それぞれの切り欠き部の最深部に位置する頂点の角度は６０°〜１５０°であり、
複数の前記切り欠き部は、それぞれの前記リードの幅方向両側にそれぞれ設けられ、１つの切り欠き部の前記リードの幅方向の延長線上には、別の切り欠き部が位置していないことを特徴とする電気化学デバイス。 A battery body enclosed in an exterior body;
At least a resin layer provided inside the sealing portion of the exterior body;
A plurality of leads extending from the battery body to the outside of the exterior body via the resin layer of the sealing portion of the exterior body;
With
Each of the leads includes a plurality of triangular cutout portions spaced along the longitudinal direction at the position of the sealing portion, and an angle of a vertex located at the deepest portion of each cutout portion is 60 °. ~ 150 °,
The plurality of notches are provided on both sides of each lead in the width direction, and another notch is not positioned on an extension line of the notch in the lead width direction. Characteristic electrochemical device.
少なくとも前記リードの前記封止部に位置する複数の領域を切り取ることで、前記切り欠き部を形成する工程と、
前記切り欠き部を有する前記リードを、前記封止部の前記樹脂層間に配置し、これらを前記外装体とともに熱圧着する工程と、
を備えることを特徴とする電気化学デバイスの製造方法。
A method for producing an electrochemical device according to claim 1 ,
Cutting the plurality of regions located at least in the sealing portion of the lead to form the notch, and
Placing the leads having the cutout portions between the resin layers of the sealing portion, and thermocompression bonding them together with the exterior body;
The manufacturing method of the electrochemical device characterized by the above-mentioned.
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