JP2016091635A - Method for manufacturing power storage device - Google Patents

Method for manufacturing power storage device Download PDF

Info

Publication number
JP2016091635A
JP2016091635A JP2014221402A JP2014221402A JP2016091635A JP 2016091635 A JP2016091635 A JP 2016091635A JP 2014221402 A JP2014221402 A JP 2014221402A JP 2014221402 A JP2014221402 A JP 2014221402A JP 2016091635 A JP2016091635 A JP 2016091635A
Authority
JP
Japan
Prior art keywords
laminate
resin mold
storage device
manufacturing
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2014221402A
Other languages
Japanese (ja)
Inventor
秋草　順
Jun Akikusa
順 秋草
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP2014221402A priority Critical patent/JP2016091635A/en
Publication of JP2016091635A publication Critical patent/JP2016091635A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Secondary Cells (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a power storage device, which enables the further downsizing of a conventional power storage device.SOLUTION: A method for manufacturing a power storage device comprises the steps of: forming a resin mold part 12 holding therein a laminate 23 including a separator and positive and negative electrodes arrange with the separator put therebetween, and having an opening 33 communicating to the outside; charging an electrolytic solution into the resin mold part 12 from the opening 33; and closing the opening 33.SELECTED DRAWING: Figure 6

Description

本発明は、蓄電デバイスの製造方法に関し、特に小型のリチウムイオン二次電池（ＬｉＢ）、及び電気二重層キャパシタ（ＥＤＬＣ）に関する。   The present invention relates to a method for manufacturing an electricity storage device, and particularly to a small lithium ion secondary battery (LiB) and an electric double layer capacitor (EDLC).

小型のリチウムイオン二次電池、電気二重層キャパシタとして、例えば、コインセルや、ラミネートセルが知られている。コインセルは、セパレータを介して配置された正極と負極が、電解液と共にケース内に収納され、さらに負極の上にスペーサ及びスプリングが配置され、スプリングの上から蓋を被せて、当該蓋をケースにかしめることにより密閉されている（例えば、特許文献１）。   As small lithium ion secondary batteries and electric double layer capacitors, for example, coin cells and laminate cells are known. In a coin cell, a positive electrode and a negative electrode arranged via a separator are housed in a case together with an electrolytic solution, and a spacer and a spring are arranged on the negative electrode, and a lid is placed on the spring, and the lid is attached to the case. It is sealed by caulking (for example, Patent Document 1).

ラミネートセルは、金属製シート材料からなる四角形状の外容器内に、板状の正極及び負極を挿入し、液状の電解質を充填して形成されることが開示されている（例えば、特許文献２）。このラミネートセルの場合、外容器の４個の端面を熱シールすることにより密閉される。   It is disclosed that a laminate cell is formed by inserting a plate-like positive electrode and a negative electrode into a rectangular outer container made of a metal sheet material and filling a liquid electrolyte (for example, Patent Document 2). ). In the case of this laminate cell, the four end faces of the outer container are sealed by heat sealing.

特開２０１４−９６２１３号公報（段落００１２）JP 2014-96213 A (paragraph 0012) 特開２００５−１３５５９９号公報（段落０００３、段落０００４）JP 2005-135599 A (paragraph 0003, paragraph 0004)

しかしながら上記特許文献に係るリチウムイオン二次電池、電気二重層キャパシタは、一定の大きさより小さくすることが困難であるという問題があった。   However, the lithium ion secondary battery and the electric double layer capacitor according to the above patent document have a problem that it is difficult to make them smaller than a certain size.

すなわち特許文献１に係るコインセルの場合、蓋をケースにかしめるため、コインセルの厚さは、蓋及びケースの厚さを含めて１ｍｍ以上にする必要がある。   That is, in the case of the coin cell according to Patent Document 1, in order to crimp the lid to the case, the thickness of the coin cell needs to be 1 mm or more including the thickness of the lid and the case.

また特許文献２に係るラミネートセルの場合、外容器の４個の端面に対し熱シールを施すためのシールしろが必要である。シールしろは、１個の端面当たり、少なくとも３ｍｍ程度必要である。そうするとラミネートセルは、両側２か所の端面に対し、１辺の長さが最少で６ｍｍ必要になる。したがってラミネートセルは、外容器内に挿入する正極及び負極の数を減らすことにより、全体の厚さを薄くすることが可能であるが、面積を小さくすることが困難であるという問題があった。   Further, in the case of the laminate cell according to Patent Document 2, seal margins for heat sealing the four end surfaces of the outer container are necessary. The margin for sealing needs to be at least about 3 mm per end face. As a result, the laminate cell requires a minimum length of 6 mm on one side with respect to the end faces at two locations on both sides. Therefore, the laminate cell can reduce the total thickness by reducing the number of positive electrodes and negative electrodes inserted into the outer container, but there is a problem that it is difficult to reduce the area.

さらにコインセル及びラミネートセルを回路基板に実装するには、コインセル及びラミネートセルと回路基板とをつなぐ端子が必要であり、端子を溶接により接合する分だけコインセル及びラミネートセルの厚さが厚くなってしまう。   Further, in order to mount the coin cell and the laminate cell on the circuit board, a terminal for connecting the coin cell and the laminate cell to the circuit board is required, and the thickness of the coin cell and the laminate cell is increased by joining the terminal by welding. .

そこで本発明は、従来よりも小型化することができる蓄電デバイスの製造方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a method for manufacturing an electricity storage device that can be made smaller than before.

本発明の第１の観点は、セパレータと、前記セパレータを介して配置された正極及び負極とを備える積層体を内包し、外部に繋がる開口を有する樹脂モールド部を形成する工程と、前記開口から前記樹脂モールド部内に電解液を注入する工程と、前記開口を閉塞する工程とを備えることを特徴とする。   A first aspect of the present invention includes a step of forming a resin mold part including an opening connected to the outside, including a laminate including a separator and a positive electrode and a negative electrode arranged via the separator, and from the opening The method includes a step of injecting an electrolytic solution into the resin mold portion and a step of closing the opening.

本発明の第２の観点は、第１の観点に基づく発明であって、前記積層体の厚さ方向の端部をバインダーで固定する工程を備えることを特徴とする。   A second aspect of the present invention is an invention based on the first aspect, characterized by comprising a step of fixing an end of the laminate in the thickness direction with a binder.

本発明の第３の観点は、第１又は第２の観点に基づく発明であって、前記電解液が、有機溶媒と、ＬｉＰＦ６及びＬｉＢＦ４の少なくとも一方を含むことを特徴とする。 A third aspect of the present invention is the invention based on the first or second aspect, characterized in that the electrolytic solution contains an organic solvent and at least one of LiPF 6 and LiBF 4 .

本発明の第４の観点は、第１又は第２の観点に基づく発明であって、前記電解液が、有機溶媒と、Ｅｔ４ＮＢＦ４とを含むことを特徴とする。 A fourth aspect of the present invention is the invention based on the first or second aspect, characterized in that the electrolytic solution contains an organic solvent and Et 4 NBF 4 .

本発明の第５の観点は、第１又は第２の観点に基づく発明であって、前記電解液が、イオン液体と、ＬｉＴＦＳＩ（リチウムビス（トリフルオロメタンスルホニル）イミド）及びＬＩＦＳＩ（リチウムビス（トリフルオロスルホニル）イミド）の少なくとも一方を含むことを特徴とする。   A fifth aspect of the present invention is the invention based on the first or second aspect, in which the electrolytic solution comprises an ionic liquid, LiTFSI (lithium bis (trifluoromethanesulfonyl) imide) and LIFSI (lithium bis (trimethyl)). And at least one of fluorosulfonyl) imide).

本発明の第１〜第５の観点の蓄電デバイスの製造方法では、積層体を樹脂モールド部で内包したことにより、従来のコインセルのように、かしめる必要がなく、またラミネートセルのようにシールしろを必要としないので、従来よりも小型のリチウムイオン二次電池（ＬｉＢ）、リチウムイオンキャパシタ（ＬｉＣ）、電気二重層キャパシタ（ＥＤＬＣ）を製造することができる。   In the manufacturing method of the electrical storage device of the 1st-5th viewpoint of this invention, it is not necessary to caulk like the conventional coin cell by including the laminated body in the resin mold part, and it seals like a laminate cell. Since no margin is required, it is possible to manufacture a lithium ion secondary battery (LiB), a lithium ion capacitor (LiC), and an electric double layer capacitor (EDLC) that are smaller than conventional ones.

本実施形態に係るリチウムイオン二次電池の構成を示す斜視図である。It is a perspective view which shows the structure of the lithium ion secondary battery which concerns on this embodiment. 本実施形態に係る積層体の構成を示す斜視図である。It is a perspective view which shows the structure of the laminated body which concerns on this embodiment. 本実施形態に係る正極の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the positive electrode which concerns on this embodiment. 本実施形態に係る負極の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the negative electrode which concerns on this embodiment. 本実施形態に係るリチウムイオン二次電池の製造方法を段階的に示す斜視図であり、図５Ａは正極、セパレータ、及び負極を積層した段階、図５Ｂは積層体を所定の大きさに切断する段階を示す図である。FIG. 5A is a perspective view showing stepwise a manufacturing method of a lithium ion secondary battery according to the present embodiment, FIG. 5A is a stage in which a positive electrode, a separator, and a negative electrode are laminated, and FIG. 5B is a cut of the laminate to a predetermined size. It is a figure which shows a step. 本実施形態に係るリチウムイオン二次電池の製造方法を段階的に示す斜視図であり、図６Ａは積層体に端子を設けた段階、図６Ｂはピンを配置した段階、図６Ｃは樹脂モールド部を形成した段階、図６Ｄはピンを抜いて樹脂モールド部に開口を形成した段階、図６Ｅは開口を閉塞した段階を示す図である。FIG. 6A is a perspective view showing stepwise a manufacturing method of a lithium ion secondary battery according to the present embodiment, FIG. 6A is a stage in which terminals are provided on the laminate, FIG. 6B is a stage in which pins are arranged, and FIG. 6D is a diagram showing a stage where the pin is removed to form an opening in the resin mold portion, and FIG. 6E is a diagram showing a stage where the opening is closed. 本実施形態に係るリチウムイオン二次電池を基板に実装する様子を示す斜視図である。It is a perspective view which shows a mode that the lithium ion secondary battery which concerns on this embodiment is mounted in a board | substrate.

以下、図面を参照して本発明の実施形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

（全体構成）
図１に示す蓄電デバイスとしてのリチウムイオン二次電池１０は、樹脂モールド部１２と、当該樹脂モールド部１２から露出した一対の端子１４，１６とを備える。樹脂モールド部１２は、射出成型により樹脂モールドされる。樹脂モールドを構成するモールド材としては、フェノール樹脂、ガラスフェノール樹脂、ジアリルフタレート樹脂などを用いることができる。 (overall structure)
A lithium ion secondary battery 10 as an electricity storage device shown in FIG. 1 includes a resin mold part 12 and a pair of terminals 14 and 16 exposed from the resin mold part 12. The resin mold part 12 is resin-molded by injection molding. As the molding material constituting the resin mold, phenol resin, glass phenol resin, diallyl phthalate resin, or the like can be used.

本実施形態の場合、リチウムイオン二次電池１０は、樹脂モールド部１２が立方体形状に形成されており、当該樹脂モールド部１２の一表面から端子１４，１６が露出している。端子１４，１６は、特に限定されないが、金属、例えば正極にはアルミニウム、負極には銅の板状部材で形成することができる。   In the case of the present embodiment, the lithium ion secondary battery 10 has the resin mold portion 12 formed in a cubic shape, and the terminals 14 and 16 are exposed from one surface of the resin mold portion 12. The terminals 14 and 16 are not particularly limited, but can be formed of a metal, for example, a plate member made of aluminum for the positive electrode and copper for the negative electrode.

樹脂モールド部１２内には、図２に示すように、セパレータ１８と、一対の電極２０，２２とを有する３層構造の積層体２３が収納されている。一対の電極２０，２２は、セパレータ１８の一側に配置された正極２０と、セパレータ１８の他側に配置された負極２２とからなる。セパレータ１８は、合成樹脂製不織布、ポリエチレン多孔質フィルム、ポリプロピレン多孔質フィルム等で形成される。   As shown in FIG. 2, a three-layer laminate 23 having a separator 18 and a pair of electrodes 20 and 22 is accommodated in the resin mold portion 12. The pair of electrodes 20 and 22 includes a positive electrode 20 disposed on one side of the separator 18 and a negative electrode 22 disposed on the other side of the separator 18. The separator 18 is formed of a synthetic resin nonwoven fabric, a polyethylene porous film, a polypropylene porous film, or the like.

正極２０は、図３に示すように、集電体２４と、当該集電体２４上に形成された合材電極２６とを有する。集電体２４は、アルミニウム箔を用いることができる。   As shown in FIG. 3, the positive electrode 20 includes a current collector 24 and a composite electrode 26 formed on the current collector 24. The current collector 24 can be made of an aluminum foil.

合材電極２６は、正極活物質と、正極用導電助剤と、バインダーとを含む。正極活物質としては、ＬｉＣｏＯ２、ＬｉＮｉＯ２、ＬｉＭｎ２Ｏ４、ＬｉＭｎＯ２、ＬｉＦｅＰＯ４などを用いることができる。導電助剤としては、アセチレンブラック、ケッチェンブラックなどのカーボンブラック、ＶＧＣＦ、黒鉛などを用いることができる。バインダーとしては、ポリテトラフルオロエチレン（ＰＴＦＥ）、ポリフッ化ビニリデン（ＰＶｄＦ）、エチレン−プロピレン−ジエン共重合体（ＥＰＤＭ）、スチレン−ブタジエンゴム（ＳＢＲ）などを用いることができる。 The composite electrode 26 includes a positive electrode active material, a positive electrode conductive additive, and a binder. As the positive electrode active material, LiCoO 2 , LiNiO 2 , LiMn 2 O 4 , LiMnO 2 , LiFePO 4, or the like can be used. As the conductive aid, carbon black such as acetylene black and ketjen black, VGCF, graphite, and the like can be used. As the binder, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), ethylene-propylene-diene copolymer (EPDM), styrene-butadiene rubber (SBR), or the like can be used.

負極２２は、図４に示すように、集電体２８と、当該集電体２８上に形成された合材電極３０とを有する。集電体２８は、銅箔、ステンレス箔、ニッケル箔などを用いることができる。   As illustrated in FIG. 4, the negative electrode 22 includes a current collector 28 and a composite electrode 30 formed on the current collector 28. As the current collector 28, a copper foil, a stainless steel foil, a nickel foil, or the like can be used.

合材電極３０は、負極活物質と、バインダーとを含む。負極活物質としては、シリコン（Ｓｉ）、酸化シリコン（ＳｉＯ）、スズ（Ｓｎ）、スズ−コバルト化合物（Ｓｎ−Ｃｏ）、酸化第二スズ（ＳｎＯ２）、天然黒鉛、人造黒鉛及びチタン酸リチウム（Ｌｉ４Ｔｉ５Ｏ１２）などを用いることができる。バインダーとしては、ポリフッ化ビニリデン（ＰＶＤＦ）、スチレン−ブタジエンゴム（ＳＢＲ）及びカルボキシメチルセルロース（ＣＭＣ）などを用いることができる。 The composite electrode 30 includes a negative electrode active material and a binder. Examples of the negative electrode active material include silicon (Si), silicon oxide (SiO), tin (Sn), tin-cobalt compound (Sn—Co), stannic oxide (SnO 2 ), natural graphite, artificial graphite, and lithium titanate. (Li 4 Ti 5 O 12 ) or the like can be used. As the binder, polyvinylidene fluoride (PVDF), styrene-butadiene rubber (SBR), carboxymethyl cellulose (CMC), or the like can be used.

積層体２３には、図示しないが電解液が充填されている。すなわち、電解液は、セパレータ１８、正極２０及び負極２２の合材電極２６，３０にそれぞれ形成されている孔や隙間に充填されている。電解液は、電解質、有機溶媒を含む。電解質としては、ＬｉＰＦ６又はＬｉＢＦ４を用いることができる。有機溶媒としては、エチレンカーボネート（ＥＣ）：ジエチルカーボネート（ＤＥＣ）とを体積比１：１の割合で混合したものや、エチレンカーボネート（ＥＣ）とエチルメチルカーボネート（ＥＭＣ）とジメチルカーボネート（ＤＭＣ）とを体積比１：１：１の割合で混合したものを用いることができる。 The laminate 23 is filled with an electrolytic solution (not shown). That is, the electrolytic solution is filled in holes and gaps formed in the composite electrodes 26 and 30 of the separator 18, the positive electrode 20, and the negative electrode 22, respectively. The electrolytic solution contains an electrolyte and an organic solvent. As the electrolyte, LiPF 6 or LiBF 4 can be used. As the organic solvent, ethylene carbonate (EC): diethyl carbonate (DEC) mixed at a volume ratio of 1: 1, ethylene carbonate (EC), ethyl methyl carbonate (EMC), dimethyl carbonate (DMC) and Can be used in a volume ratio of 1: 1: 1.

（製造方法）
次に上記のように構成されたリチウムイオン二次電池１０の製造方法を、図５を参照して説明する。まず、セパレータ１８を挟んで、一側に正極２０、他側に負極２２を配置し、重ね合せる。この際、正極２０及び負極２２は、それぞれ合材電極２６，３０をセパレータ１８に接触させた状態で配置される（図５Ａ）。 (Production method)
Next, a manufacturing method of the lithium ion secondary battery 10 configured as described above will be described with reference to FIG. First, the positive electrode 20 is disposed on one side and the negative electrode 22 is disposed on the other side with the separator 18 interposed therebetween, and are overlapped. At this time, the positive electrode 20 and the negative electrode 22 are disposed in a state where the composite electrodes 26 and 30 are in contact with the separator 18 (FIG. 5A).

次いで、所定の大きさに切断し、所望の大きさの積層体２３を得る（図５Ｂ）。ここで、積層体２３の厚さ方向の１辺に、絶縁性のバインダーを塗布してもよい。これによりセパレータ１８、正極２０、及び負極２２がずれるのを防止することができる。絶縁性のバインダーは、ＰＶＤＦ等の電極用のバインダーを用いることができる。   Next, the laminate 23 is cut into a predetermined size to obtain a laminate 23 having a desired size (FIG. 5B). Here, an insulating binder may be applied to one side of the laminate 23 in the thickness direction. Thereby, it is possible to prevent the separator 18, the positive electrode 20, and the negative electrode 22 from being displaced. As the insulating binder, an electrode binder such as PVDF can be used.

得られた積層体２３に、一対の端子１４，１６を電気的に接続する（図６Ａ）。一対の端子１４，１６のうち一方１４は正極２０の集電体２４、他方１６は負極２２の集電体２８に、例えば超音波溶接により接合される。   A pair of terminals 14 and 16 are electrically connected to the obtained laminate 23 (FIG. 6A). One of the pair of terminals 14 and 16 is joined to the current collector 24 of the positive electrode 20 and the other 16 is joined to the current collector 28 of the negative electrode 22 by, for example, ultrasonic welding.

次いで、一対の端子１４，１６が接合された積層体２３を、金型（図示しない）に設置する。このとき、一端を積層体２３に接触させた状態でピン３２を保持する（図６Ｂ）。ピン３２は、積層体２３の側面にＰＶＤＦ等のバインダーで点付けすることが可能である。金型を１６０〜２００℃に加熱し、続いて、同温度に加熱された溶融したモールド材を５０〜７０ｋｇｆ／ｃｍ２の圧力で、プレスにより金型に流し込み、充填する。数秒間、この状態を維持した後、金型を冷却し、モールド材が冷却によって固化することにより、樹脂モールド部１２が形成される（図６Ｃ）。その後、樹脂モールド部１２に付着したモールドのバリ（図示せず）をカッターで取り除く。 Next, the laminate 23 in which the pair of terminals 14 and 16 are joined is placed in a mold (not shown). At this time, the pin 32 is held in a state where one end is in contact with the laminate 23 (FIG. 6B). The pin 32 can be spotted on the side surface of the laminate 23 with a binder such as PVDF. The mold is heated to 160 to 200 ° C., and then the molten mold material heated to the same temperature is poured into the mold by a press at a pressure of 50 to 70 kgf / cm 2 and filled. After maintaining this state for several seconds, the mold is cooled, and the molding material is solidified by cooling, whereby the resin mold portion 12 is formed (FIG. 6C). Thereafter, mold burrs (not shown) attached to the resin mold portion 12 are removed with a cutter.

樹脂モールド部１２からピン３２を抜き取ると、外部から樹脂モールド部１２内へつながる開口３３が形成される（図６Ｄ）。次いで、積層体２３を内部に備える樹脂モールド部１２を、チャンバー（図示しない）内に設置し、当該チャンバー内を真空引きする。そして開口３３を通じて樹脂モールド部１２内に電解質を含む電解液を注入する。   When the pin 32 is extracted from the resin mold part 12, an opening 33 connected from the outside into the resin mold part 12 is formed (FIG. 6D). Subsequently, the resin mold part 12 provided with the laminated body 23 is installed in a chamber (not shown), and the inside of the chamber is evacuated. Then, an electrolytic solution containing an electrolyte is injected into the resin mold portion 12 through the opening 33.

樹脂モールド部１２内に注入された電解液は、セパレータ１８、正極２０及び負極２２の合材電極２６，３０に形成された孔や隙間に入り込み、充填される。   The electrolyte injected into the resin mold part 12 enters and fills the holes and gaps formed in the composite electrodes 26 and 30 of the separator 18, the positive electrode 20 and the negative electrode 22.

次いで、蓋３４を開口３３に差し込み、樹脂モールド部１２に固着することにより樹脂モールド部１２を密閉する（図６Ｅ）。蓋３４は、樹脂、例えば、フェノール樹脂、ガラスフェノール樹脂、ジアリルフタレート樹脂で形成することができる。当該蓋３４を加熱して一旦溶融させ、再び冷却固化させることにより、樹脂モールド部１２に固着する。   Next, the resin mold portion 12 is sealed by inserting the lid 34 into the opening 33 and fixing the lid 34 to the resin mold portion 12 (FIG. 6E). The lid 34 can be formed of a resin, for example, a phenol resin, a glass phenol resin, or a diallyl phthalate resin. The lid 34 is heated and melted once, and then cooled and solidified again to be fixed to the resin mold portion 12.

以上のようにして、樹脂モールド部１２によって積層体２３が密閉されたリチウムイオン二次電池１０を製造することができる。   As described above, the lithium ion secondary battery 10 in which the laminate 23 is sealed by the resin mold part 12 can be manufactured.

（作用及び効果）
本実施形態に係るリチウムイオン二次電池１０の製造方法では、積層体２３を覆うように樹脂モールド部１２を形成し、当該樹脂モールド部１２に形成された開口３３を通じて樹脂モールド部１２内に電解液を注入した後、開口３３を閉塞することにより樹脂モールド部１２を密閉する。これによりリチウムイオン二次電池１０は、従来のコインセルのようにかしめる必要がないので厚さを１ｍｍ以下にすることができると共に、ラミネートセルのように熱シールをする必要がないのでシールしろを省略することにより面積を小さくすることができる。したがって本実施形態に係る製造方法は、従来よりも小型のリチウムイオン二次電池１０を製造することができる。 (Function and effect)
In the manufacturing method of the lithium ion secondary battery 10 according to the present embodiment, the resin mold portion 12 is formed so as to cover the laminate 23, and electrolysis is performed in the resin mold portion 12 through the opening 33 formed in the resin mold portion 12. After injecting the liquid, the resin mold part 12 is sealed by closing the opening 33. As a result, the lithium ion secondary battery 10 does not need to be crimped as in a conventional coin cell, so the thickness can be reduced to 1 mm or less, and it is not necessary to perform heat sealing as in a laminate cell, so that the sealing margin can be reduced. By omitting, the area can be reduced. Therefore, the manufacturing method according to the present embodiment can manufacture a lithium ion secondary battery 10 that is smaller than the conventional one.

リチウムイオン二次電池１０は、端子１４，１６を備えているので、図７に示すように、回路基板３６に実装することができる。本図の場合、回路基板３６は、表面に薄膜で金属電極３７が形成されており、当該金属電極３７上に半田３８が設けられている。半田３８上にリチウムイオン二次電池１０を載せた後、半田３８が溶融する温度に加熱することにより、端子１４，１６と金属電極３７とを接合する。このようにリチウムイオン二次電池１０は、端子１４，１６によって回路基板３６に実装することができる。したがってリチウムイオン二次電池１０は、従来のように端子を溶接によりコインセルやラミネートセルに接合する必要がないので、その分だけ厚さを薄くすることができる。   Since the lithium ion secondary battery 10 includes the terminals 14 and 16, it can be mounted on the circuit board 36 as shown in FIG. In the case of this figure, the circuit board 36 has a thin metal electrode 37 formed on the surface, and a solder 38 is provided on the metal electrode 37. After the lithium ion secondary battery 10 is placed on the solder 38, the terminals 14 and 16 and the metal electrode 37 are joined by heating to a temperature at which the solder 38 melts. Thus, the lithium ion secondary battery 10 can be mounted on the circuit board 36 by the terminals 14 and 16. Therefore, since the lithium ion secondary battery 10 does not need to be joined to a coin cell or a laminate cell by welding as in the conventional case, the thickness can be reduced accordingly.

（変形例）
本発明は上記実施形態に限定されるものではなく、本発明の趣旨の範囲内で適宜変更することが可能である。例えば、電解液は、上記実施形態に限られず、イオン液体と、ＬｉＴＦＳＩ（リチウムビス（トリフルオロメタンスルホニル）イミド）及びＬｉＦＳＩ（リチウムビス（トリフルオロスルホニル）イミド）の少なくとも一方を含むこととしてもよい。 (Modification)
The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the gist of the present invention. For example, the electrolytic solution is not limited to the above embodiment, and may include an ionic liquid and at least one of LiTFSI (lithium bis (trifluoromethanesulfonyl) imide) and LiFSI (lithium bis (trifluorosulfonyl) imide).

上記実施形態では、蓄電デバイスとしてリチウムイオン二次電池に適用した場合について説明したが、本発明はこれに限らず、リチウムイオンキャパシタ（ＬｉＣ）や、電気二重層キャパシタに適用してもよい。この場合、正極及び負極は、上記実施形態と同様、集電体と、当該集電体上に形成された合材電極とを有する。集電体はアルミニウム箔を用いることができる。合材電極は、活性炭と、導電助剤と、バインダーとを含む。導電助剤は、アセチレンブラックやケッチェンブラックを用いることができる。バインダーは、ＰＶＤＦやテフロン（登録商標）を用いることができる。電解液は、有機溶媒と、電解質とを含む。有機溶媒は、プロピレンカーボネートを用いることができる。電解質は、Ｅｔ４ＮＢＦ４を用いることができる。電気二重層キャパシタは、上記実施形態と同様に製造することができるので、上記実施形態と同様の効果を得ることができる。 In the above embodiment, the case where the power storage device is applied to a lithium ion secondary battery has been described. However, the present invention is not limited thereto, and may be applied to a lithium ion capacitor (LiC) or an electric double layer capacitor. In this case, the positive electrode and the negative electrode have a current collector and a composite electrode formed on the current collector, as in the above embodiment. An aluminum foil can be used for the current collector. The composite electrode includes activated carbon, a conductive additive, and a binder. As the conductive assistant, acetylene black or ketjen black can be used. PVDF or Teflon (registered trademark) can be used as the binder. The electrolytic solution includes an organic solvent and an electrolyte. Propylene carbonate can be used as the organic solvent. Et 4 NBF 4 can be used as the electrolyte. Since the electric double layer capacitor can be manufactured in the same manner as in the above embodiment, the same effect as in the above embodiment can be obtained.

またリチウムイオン二次電池は、直列に接続して高電圧化してもよい。また上記第１実施形態に係るリチウムイオン二次電池を並列に接続することにより、高容量化することができる。   The lithium ion secondary battery may be connected in series to increase the voltage. In addition, the capacity can be increased by connecting the lithium ion secondary batteries according to the first embodiment in parallel.

また上記実施形態の場合、積層体に、一対の端子を電気的に接続した場合について説明したが、本発明はこれに限らず、積層体の集電体を大きく形成し、集電体の一部を樹脂モールド部の外部に露出させ、一対の端子としてもよい。   In the case of the above embodiment, the case where a pair of terminals are electrically connected to the laminate has been described. However, the present invention is not limited to this, and a large current collector of the laminate is formed. The part may be exposed to the outside of the resin mold part to form a pair of terminals.

１０ リチウムイオン二次電池（蓄電デバイス）
１２ 樹脂モールド部
１４，１６ 端子
１８ セパレータ
２０ 正極
２２ 負極
２３ 積層体
３３ 開口 10 Lithium ion secondary battery (power storage device)
12 Resin mold parts 14 and 16 Terminal 18 Separator 20 Positive electrode 22 Negative electrode 23 Laminate 33 Opening

Claims (5)

セパレータと、前記セパレータを介して配置された正極及び負極とを備える積層体を内包し、外部に繋がる開口を有する樹脂モールド部を形成する工程と、
前記開口から前記樹脂モールド部内に電解液を注入する工程と、
前記開口を閉塞する工程と
を備えることを特徴とする蓄電デバイスの製造方法。 Including a separator and a laminate including a positive electrode and a negative electrode disposed via the separator, and forming a resin mold portion having an opening connected to the outside;
Injecting an electrolytic solution into the resin mold part from the opening;
And a step of closing the opening. 前記積層体の厚さ方向の端部をバインダーで固定する工程を備えることを特徴とする請求項１記載の蓄電デバイスの製造方法。 The method for manufacturing an electricity storage device according to claim 1, further comprising a step of fixing an end portion in the thickness direction of the laminate with a binder. 前記電解液が、
有機溶媒と、
ＬｉＰＦ６及びＬｉＢＦ４の少なくとも一方
を含むことを特徴とする請求項１又は２記載の蓄電デバイスの製造方法。 The electrolyte is
An organic solvent,
The method for manufacturing an electricity storage device according to claim 1, comprising at least one of LiPF 6 and LiBF 4 . 前記電解液が、有機溶媒と、Ｅｔ４ＮＢＦ４とを含むことを特徴とする請求項１又は２記載の蓄電デバイスの製造方法。 The method for manufacturing an electricity storage device according to claim 1, wherein the electrolytic solution contains an organic solvent and Et 4 NBF 4 . 前記電解液が、イオン液体と、ＬｉＴＦＳＩ（リチウムビス（トリフルオロメタンスルホニル）イミド）及びＬｉＦＳＩ（リチウムビス（トリフルオロスルホニル）イミド）の少なくとも一方を含むことを特徴とする請求項１又は２記載の蓄電デバイスの製造方法。 3. The electricity storage according to claim 1, wherein the electrolytic solution contains an ionic liquid and at least one of LiTFSI (lithium bis (trifluoromethanesulfonyl) imide) and LiFSI (lithium bis (trifluorosulfonyl) imide). Device manufacturing method.
JP2014221402A 2014-10-30 2014-10-30 Method for manufacturing power storage device Pending JP2016091635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014221402A JP2016091635A (en) 2014-10-30 2014-10-30 Method for manufacturing power storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014221402A JP2016091635A (en) 2014-10-30 2014-10-30 Method for manufacturing power storage device

Publications (1)

Publication Number Publication Date
JP2016091635A true JP2016091635A (en) 2016-05-23

Family

ID=56019713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014221402A Pending JP2016091635A (en) 2014-10-30 2014-10-30 Method for manufacturing power storage device

Country Status (1)

Country Link
JP (1) JP2016091635A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019156120A1 (en) * 2018-02-08 2019-08-15 株式会社村田製作所 Electrolytic capacitor

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819459B1 (en) * 1969-11-06 1973-06-13
JPS58177934U (en) * 1982-05-21 1983-11-28 日立コンデンサ株式会社 Electrolytic capacitor
JPS6030531U (en) * 1983-08-05 1985-03-01 日本ケミコン株式会社 Chip type electrolytic capacitor
JPS62216146A (en) * 1986-03-17 1987-09-22 Matsushita Electric Ind Co Ltd Enclosed storage battery
JPS63314770A (en) * 1987-06-17 1988-12-22 Matsushita Electric Ind Co Ltd Manufacture of sealed lead accumulator
JPH04288361A (en) * 1990-03-23 1992-10-13 Nec Corp Activated carbon/polyacene material composite, its production, electrical double-layer capacitor and its composite part
JP2005032786A (en) * 2003-07-08 2005-02-03 Sanyo Electric Co Ltd Electric double layer capacitor and method of manufacturing battery
JP2008147391A (en) * 2006-12-08 2008-06-26 Toshiba Corp Power supply integrated semiconductor module, and its manufacturing method
JP2009508298A (en) * 2005-09-08 2009-02-26 エボニック デグサ ゲーエムベーハー Laminate for Li battery consisting of separators and electrodes alternately stacked one above the other
JP2010003471A (en) * 2008-06-19 2010-01-07 Hitachi Maxell Ltd Nonaqueous electrolyte secondary battery
JP2011119122A (en) * 2009-12-03 2011-06-16 Iwasaki Giko Kk Resin protective layer molding method for sealed battery
WO2013001961A1 (en) * 2011-06-28 2013-01-03 株式会社村田製作所 Insulating-adhesive-layer composition, element for electricity-storage device, electricity-storage device, and manufacturing methods therefor
JP2014060033A (en) * 2012-09-18 2014-04-03 Toyota Motor Corp Battery, battery pack, and method of manufacturing battery

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819459B1 (en) * 1969-11-06 1973-06-13
JPS58177934U (en) * 1982-05-21 1983-11-28 日立コンデンサ株式会社 Electrolytic capacitor
JPS6030531U (en) * 1983-08-05 1985-03-01 日本ケミコン株式会社 Chip type electrolytic capacitor
JPS62216146A (en) * 1986-03-17 1987-09-22 Matsushita Electric Ind Co Ltd Enclosed storage battery
JPS63314770A (en) * 1987-06-17 1988-12-22 Matsushita Electric Ind Co Ltd Manufacture of sealed lead accumulator
JPH04288361A (en) * 1990-03-23 1992-10-13 Nec Corp Activated carbon/polyacene material composite, its production, electrical double-layer capacitor and its composite part
JP2005032786A (en) * 2003-07-08 2005-02-03 Sanyo Electric Co Ltd Electric double layer capacitor and method of manufacturing battery
JP2009508298A (en) * 2005-09-08 2009-02-26 エボニック デグサ ゲーエムベーハー Laminate for Li battery consisting of separators and electrodes alternately stacked one above the other
JP2008147391A (en) * 2006-12-08 2008-06-26 Toshiba Corp Power supply integrated semiconductor module, and its manufacturing method
JP2010003471A (en) * 2008-06-19 2010-01-07 Hitachi Maxell Ltd Nonaqueous electrolyte secondary battery
JP2011119122A (en) * 2009-12-03 2011-06-16 Iwasaki Giko Kk Resin protective layer molding method for sealed battery
WO2013001961A1 (en) * 2011-06-28 2013-01-03 株式会社村田製作所 Insulating-adhesive-layer composition, element for electricity-storage device, electricity-storage device, and manufacturing methods therefor
JP2014060033A (en) * 2012-09-18 2014-04-03 Toyota Motor Corp Battery, battery pack, and method of manufacturing battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019156120A1 (en) * 2018-02-08 2019-08-15 株式会社村田製作所 Electrolytic capacitor
JPWO2019156120A1 (en) * 2018-02-08 2020-12-03 株式会社村田製作所 Electrolytic capacitor

Similar Documents

Publication Publication Date Title
KR101776885B1 (en) Prismatic Battery Cell Having Two or More Case Members
US7262956B2 (en) Battery pack and method for manufacturing the same
JP6289899B2 (en) Nonaqueous electrolyte battery, assembled battery and storage battery device
JP5505218B2 (en) Sealed storage battery
US9786948B2 (en) Thin film lithium-ion battery
KR101833540B1 (en) Battery Cell Having Means For Venting The Gas
KR20150125263A (en) Sealing Device For Battery Case And Battery Cell Manufactured Using The Same
TWI643385B (en) Battery cell having recess portion formed at portion of electrode tab
WO2016067851A1 (en) Electricity storage device and method for manufacturing electricity storage device
JP5679271B2 (en) Battery cover with electrode terminal, method for manufacturing battery cover with electrode terminal, and sealed battery
CN113517501A (en) Battery and power consumption device containing same
JP5987717B2 (en) Nonaqueous electrolyte secondary battery and manufacturing method thereof
JP2001273930A (en) Manufacturing method of polymer battery
KR20070101568A (en) Lithium rechargeable battery
KR20120123851A (en) Electrode assembly including anode and cathod electrode more than 2 and electrochemical device using the same
JP2012124007A (en) Secondary battery, and method of manufacturing the same
KR20160088647A (en) Pouch-Type Battery Cell Having Residue Sealing Portion
JP2016091635A (en) Method for manufacturing power storage device
JP5044933B2 (en) battery
JP2012195122A (en) Nonaqueous electrolyte secondary battery
JP2012221911A (en) Battery
KR102256131B1 (en) Method for manufacturing battery cell and battery using the methor
JP2016091711A (en) Secondary battery and method of manufacturing secondary battery
CN107112450B (en) Battery cell having a plastic component and battery
KR101798929B1 (en) Battery Case Having Label for Reinforcement and Secondary Battery Comprising the Same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170929

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20180629

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180717

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20190205