JP5114955B2 - Coin-shaped electrochemical cell - Google Patents
Coin-shaped electrochemical cell Download PDFInfo
- Publication number
- JP5114955B2 JP5114955B2 JP2007014768A JP2007014768A JP5114955B2 JP 5114955 B2 JP5114955 B2 JP 5114955B2 JP 2007014768 A JP2007014768 A JP 2007014768A JP 2007014768 A JP2007014768 A JP 2007014768A JP 5114955 B2 JP5114955 B2 JP 5114955B2
- Authority
- JP
- Japan
- Prior art keywords
- gasket
- coin
- electrochemical cell
- positive electrode
- filler
- 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.)
- Expired - Fee Related
Links
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 42
- 239000000945 filler Substances 0.000 claims description 21
- 239000011787 zinc oxide Substances 0.000 claims description 21
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 20
- 229920002530 polyetherether ketone Polymers 0.000 claims description 20
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 19
- 229920006015 heat resistant resin Polymers 0.000 claims description 19
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 19
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 13
- 239000000378 calcium silicate Substances 0.000 claims description 13
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 5
- 238000010248 power generation Methods 0.000 claims description 3
- 235000014692 zinc oxide Nutrition 0.000 description 20
- 229920005989 resin Polymers 0.000 description 18
- 239000011347 resin Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 16
- 239000011342 resin composition Substances 0.000 description 11
- 239000000835 fiber Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 239000012784 inorganic fiber Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005486 organic electrolyte Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
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
- Y02E60/13—Energy storage using capacitors
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Description
本発明は正極と負極と電解質からなる発電要素を内部に含み、封口板が樹脂製のガスケットを介して正極ケース内に挿入され、正極ケースをかしめることで封口する構造のコイン形電池及びコイン形電気二重層キャパシタ等の電気化学セルに関するものである。 The present invention includes a coin-type battery and a coin having a structure in which a power generation element including a positive electrode, a negative electrode, and an electrolyte is included, a sealing plate is inserted into the positive electrode case via a resin gasket, and the positive electrode case is sealed by caulking The present invention relates to an electrochemical cell such as an electric double layer capacitor.
近年、携帯電話やＰＤＡ等の小型情報携帯端末機器が急速に普及しており、これらの携帯機器の主電源としては、リチウムイオン二次電池等が多く用いられている。これらの携帯機器において、主電源からの電力供給が停止した場合でも機器内のメモリーや時計機能をバックアップする必要があり、そのためにメモリーバックアップ用電源としてコイン形のリチウム電池あるいは電気二重層コンデンサなどの電気化学セルが用いられるようになってきた。 In recent years, small information portable terminal devices such as mobile phones and PDAs are rapidly spreading, and lithium ion secondary batteries and the like are often used as the main power source of these portable devices. In these portable devices, even if the power supply from the main power supply stops, it is necessary to back up the memory and clock function in the device. For this reason, a coin-type lithium battery or an electric double layer capacitor is used as a memory backup power source. Electrochemical cells have been used.
特に近年、これらのメモリーバックアップ用電源に用いられるコイン形電気化学セルは基板に表面実装される際、リフロー時の耐熱性が要求されている。なお、リフロー時の耐熱性とは、クリーム半田が塗布された基板上に電子部品を乗せ、加熱された炉内を通過させて基板上の半田を溶融させ、電子部品を基板に表面実装させる際における耐熱性のことを言う。 Particularly in recent years, coin-type electrochemical cells used for these memory backup power sources are required to have heat resistance during reflow when they are surface-mounted on a substrate. Note that the heat resistance during reflow refers to when an electronic component is placed on a substrate coated with cream solder, passed through a heated furnace, and the solder on the substrate is melted so that the electronic component is surface-mounted on the substrate. Says the heat resistance.
リフロー時の耐熱性を満足するため、電池やキャパシタの電気化学セルの部材にも耐熱性のものが用いられ、特にガスケットに関しては、従来のポリプロピレン（ＰＰ）から耐熱性が高い硬質のエンジニアリングプラスチックが用いられるようになった。 In order to satisfy the heat resistance at the time of reflow, heat resistant materials are used for the members of electrochemical cells of batteries and capacitors. Especially for gaskets, hard engineering plastics with higher heat resistance are used than conventional polypropylene (PP). It came to be used.
その中でも耐熱樹脂としてポリフェニレンサルファイド（ＰＰＳ）を用いた有機電解液二次電池が提案されており、高温環境下に晒されても形状を安定化させるためにガラス繊維等のフィラーを添加してもよいことが開示されている（例えば、特許文献１参照）。
また、ガスケットに耐熱樹脂と平均繊維長が１０〜２０μｍの無機繊維とを一緒に含有する樹脂組成物によって構成することも開示され（例えば、特許文献２参照）、さらに耐熱樹脂と平均繊維長が３〜１０μｍの無機繊維とを一緒に含有する樹脂組成物によって構成されると繊維や樹脂密度にばらつきのないガスケットが成型でき、ガスケットの成型性や電池の耐漏液性が向上することも開示されている（例えば、特許文献３参照）。
It is also disclosed that the gasket is constituted by a resin composition containing a heat resistant resin and an inorganic fiber having an average fiber length of 10 to 20 μm (see, for example, Patent Document 2). It is also disclosed that a gasket having no variation in fiber and resin density can be formed by a resin composition containing 3 to 10 μm inorganic fibers together, and that the gasket moldability and battery leakage resistance are improved. (For example, refer to Patent Document 3).
しかしながら、上記技術を適用した樹脂組成物を用いてもガスケット形状に射出成型する際、樹脂組成物の溶融粘度によっては無機繊維の分散が悪くなり、樹脂密度にばらつきのあるガスケットができてしまうことがあった。 However, even when a resin composition to which the above technology is applied is used, when the resin composition is injection-molded into a gasket shape, dispersion of inorganic fibers may be deteriorated depending on the melt viscosity of the resin composition, resulting in a gasket having a variation in resin density. was there.
そして前記ガスケットを用いて作製した電気化学セルが、リフロー半田付けのための高温雰囲気に晒されると、ガスケットの樹脂密度が低い部分において、耐熱性が低下し、熱収縮による樹脂の変形が大きくなり、正極ケースとガスケットに隙間が生じ、そこから漏液が生じてしまうという課題を有していた。 When the electrochemical cell produced using the gasket is exposed to a high temperature atmosphere for reflow soldering, the heat resistance is lowered at a portion where the resin density of the gasket is low, and the deformation of the resin due to thermal shrinkage increases. In addition, there was a problem that a gap was generated between the positive electrode case and the gasket, and liquid leakage occurred therefrom.
前記課題を解決するために、本発明は、正極と負極と電解質とを有する発電素子を、封口板と正極ケースとガスケットとにより封口してなるコイン形電気化学セルにおいて、前記ガスケットが耐熱樹脂からなり、且つテトラポット形状の針状単結晶体となった酸化亜鉛を充填フィラーとして含有することを特徴とする。 In order to solve the above problems, the present invention provides a coin-type electrochemical cell in which a power generation element having a positive electrode, a negative electrode, and an electrolyte is sealed with a sealing plate, a positive electrode case, and a gasket. And zinc oxide formed into a tetrapot-shaped needle-like single crystal is contained as a filler.
本発明のコイン形電気化学セルでは、ガスケットを形成する際に、酸化亜鉛のテトラポット状の立体形状が互いに立体障害としてぶつかり合い、互いの配向を変化させ、ガスケット内でテトラポット形状の酸化亜鉛が均一に分散することにより、繊維や樹脂密度にばらつきのないガスケットができ、コイン形電気化学セルに組み立てられた場合にリフロー時の高温に晒された時の熱変形を緩和することにより、耐熱性を向上させるものである。 In the coin-shaped electrochemical cell of the present invention, when a gasket is formed, the tetrapod-shaped three-dimensional shape of zinc oxide collides with each other as a steric hindrance, the mutual orientation changes, and the tetrapot-shaped zinc oxide in the gasket By uniformly dispersing the resin, a gasket with no variation in fiber and resin density can be obtained, and when assembled in a coin-type electrochemical cell, it is heat resistant by mitigating thermal deformation when exposed to high temperatures during reflow. It improves the performance.
本発明は、正極と負極と電解質とを有する発電素子を、封口板と正極ケースとガスケットとにより封口してなるコイン形電気化学セルにおいて、前記ガスケットが耐熱樹脂からなり、且つテトラポット形状の針状単結晶体となった酸化亜鉛を充填フィラーとして含有することを特徴とするコイン形電気化学セルである。 The present invention relates to a coin-shaped electrochemical cell in which a power generating element having a positive electrode, a negative electrode, and an electrolyte is sealed with a sealing plate, a positive electrode case, and a gasket. It is a coin-type electrochemical cell characterized by containing zinc oxide in the form of a single crystal as a filler.
前記電気化学セルは、ガスケットを形成する際に、酸化亜鉛のテトラポット状の立体形状が互いに立体障害としてぶつかり合い、互いの配向を変化させ、ガスケット内でテトラポット形状の酸化亜鉛が均一に分散することにより、繊維や樹脂密度にばらつきのないガスケットができ、コイン形電気化学セルに組み立てられた場合にリフロー時の高温に晒された時の熱変形を緩和することにより、耐熱性を向上させることができる。 In the electrochemical cell, when the gasket is formed, the three-dimensional shape of the zinc pot tetrapot collides with each other as a steric hindrance and changes the orientation of each other, and the tetrapot-shaped zinc oxide is uniformly dispersed in the gasket. By doing this, a gasket with no variation in fiber and resin density can be created, and when assembled in a coin-type electrochemical cell, heat resistance is improved by mitigating thermal deformation when exposed to high temperatures during reflow be able to.
また同様に前記ガスケットの充填フィラーとして珪酸カルシウムとテトラポット形状の針状単結晶体となった酸化亜鉛を含有させた場合、酸化亜鉛のテトラポット形状が酸化亜鉛同士だけでなく、珪酸カルシウム繊維の立体障害ともなり、珪酸カルシウム繊維の配向を変化させ、ガスケット内で珪酸カルシウム繊維を乱流させ分散させることで、同様に繊維や樹脂密度にばらつきのないガスケットができ、コイン形電気化学セルに組み立てられた場合にリフロー時の高温に晒された時の熱変形を緩和することにより、耐熱性を向上させることができる。 Similarly, when calcium silicate and zinc oxide formed into a tetrapot-shaped needle-like single crystal are included as the filler for the gasket, the tetrapot shape of zinc oxide is not only between zinc oxides but also of calcium silicate fibers. This is also a steric hindrance, and by changing the orientation of the calcium silicate fibers and turbulently dispersing the calcium silicate fibers in the gasket, a gasket with no variation in fiber and resin density can be produced and assembled into a coin-type electrochemical cell. In such a case, the heat resistance can be improved by alleviating thermal deformation when exposed to high temperatures during reflow.
またその際、前記ガスケットの耐熱樹脂がＰＰＳあるいはポリエーテルエーテルケトン（ＰＥＥＫ）を用いると、融点が高く耐熱性を向上させる点で特に好ましい。 At that time, it is particularly preferable that PPS or polyetheretherketone (PEEK) is used as the heat-resistant resin of the gasket because the melting point is high and the heat resistance is improved.
またその際、前記ガスケットに含有させる充填フィラーの量が４〜４０ｗｔ％である場合に、ガスケットの成型性と耐熱性を維持させる点で特に好ましい。 Moreover, in that case, when the quantity of the filling filler contained in the said gasket is 4-40 wt%, it is especially preferable at the point which maintains the moldability and heat resistance of a gasket.
以下に、本発明の実施の形態を説明するが本発明は、下記の実施例に限定されるものではない。 Embodiments of the present invention will be described below, but the present invention is not limited to the following examples.
（実施例１）
実施例１のガスケットとして、耐熱樹脂にポリフェニレンサルファイド（ＰＰＳ）を用い、これに充填フィラーとしてテトラポット形状の酸化亜鉛を２０ｗｔ％含有させてなる樹脂組成物を用い作製させたガスケットをガスケットＡとした。
Example 1
As a gasket of Example 1, a gasket prepared by using polyphenylene sulfide (PPS) as a heat-resistant resin and using a resin composition containing 20 wt% of tetrapot-shaped zinc oxide as a filling filler was designated as gasket A. .
（実施例２）
耐熱樹脂にポリエーテルエーテルケトン樹脂（ＰＥＥＫ）を用いる以外は、実施例１と同様に作成したガスケットをガスケットＢとした。
(Example 2)
Gasket B was a gasket prepared in the same manner as in Example 1 except that polyether ether ketone resin (PEEK) was used as the heat resistant resin.
（実施例３）
実施例３のガスケットとして、耐熱樹脂にＰＰＳを用い、これに充填フィラーとして珪酸カルシウムを１０ｗｔ％、テトラポット形状の酸化亜鉛を１０ｗｔ％含有させてなる樹脂組成物を用い作製したガスケットをガスケットＣとした。
(Example 3)
As a gasket of Example 3, a gasket produced by using a resin composition containing PPS as a heat-resistant resin and containing 10 wt% of calcium silicate as a filler and 10 wt% of tetrapot-shaped zinc oxide as a filler is referred to as gasket C. did.
（実施例４）
耐熱樹脂にＰＥＥＫを用いる以外は、実施例４と同様にして作製したガスケットをガスケットＤとした。
Example 4
A gasket produced in the same manner as in Example 4 except that PEEK was used as the heat resistant resin was designated as gasket D.
（実施例５）
実施例５のガスケットとして、耐熱樹脂にポリフェニレンサルファイド（ＰＰＳ）を用い、これに充填フィラーとしてテトラポット形状の酸化亜鉛を４ｗｔ％含有させてなる樹脂組成物を用い作製させたガスケットをガスケットＥとした。
(Example 5)
As gasket of Example 5, gasket E was prepared by using polyphenylene sulfide (PPS) as a heat-resistant resin and using a resin composition containing 4 wt% of tetrapot-shaped zinc oxide as a filling filler. .
（実施例６）
耐熱樹脂にポリエーテルエーテルケトン樹脂（ＰＥＥＫ）を用いる以外は、実施例５と同様に作成したガスケットをガスケットＦとした。
(Example 6)
A gasket prepared in the same manner as in Example 5 was used as gasket F except that polyether ether ketone resin (PEEK) was used as the heat resistant resin.
（実施例７）
充填フィラーとして珪酸カルシウムを２ｗｔ％、テトラポット形状の酸化亜鉛を２ｗｔ％含有させたこと以外は、実施例３と同様に作成したガスケットをガスケットＧとした。
(Example 7)
A gasket G was prepared in the same manner as in Example 3 except that 2 wt% of calcium silicate and 2 wt% of tetrapotted zinc oxide were contained as the filler.
（実施例８）
耐熱樹脂にポリエーテルエーテルケトン樹脂（ＰＥＥＫ）を用いる以外は、実施例７と同様に作成したガスケットをガスケットＨとした。
(Example 8)
A gasket prepared in the same manner as in Example 7 was used as gasket H, except that polyether ether ketone resin (PEEK) was used as the heat resistant resin.
（比較例１）
比較例１として耐熱樹脂にポリフェニレンサルファイド（ＰＰＳ）を用い、これに充填フィラーとして珪酸カルシウムを２０ｗｔ％含有させてなる樹脂組成物を用い作製させたガスケットをガスケットＩとした。
(Comparative Example 1)
As Comparative Example 1, gasket I was prepared by using polyphenylene sulfide (PPS) as a heat-resistant resin and using a resin composition containing 20 wt% calcium silicate as a filler.
（比較例２）
耐熱樹脂にポリエーテルエーテルケトン樹脂（ＰＥＥＫ）を用いる以外は、比較例１と同様に作成したガスケットをガスケットＪとした。
(Comparative Example 2)
A gasket prepared in the same manner as in Comparative Example 1 except that a polyether ether ketone resin (PEEK) was used as the heat resistant resin was designated as gasket J.
（比較例３）
比較例３として耐熱樹脂にポリフェニレンサルファイド（ＰＰＳ）を用い、これに充填フィラーとしてテトラポット形状の酸化亜鉛を２ｗｔ％含有させてなる樹脂組成物を用い作製させたガスケットをガスケットＫとした。
(Comparative Example 3)
As Comparative Example 3, a gasket prepared by using polyphenylene sulfide (PPS) as a heat-resistant resin and using a resin composition containing 2 wt% of tetrapot-shaped zinc oxide as a filling filler was designated as gasket K.
（比較例４）
耐熱樹脂にポリエーテルエーテルケトン樹脂（ＰＥＥＫ）を用いる以外は、比較例３と同様に作成したガスケットをガスケットＬとした。
(Comparative Example 4)
A gasket prepared in the same manner as in Comparative Example 3 except that a polyether ether ketone resin (PEEK) was used as the heat resistant resin was designated as gasket L.
（比較例５）
耐熱樹脂に充填フィラーとして珪酸カルシウムを０．５％、テトラポット形状の酸化亜鉛を０．５ｗｔ％含有させてなる樹脂組成物を用いたこと以外は実施例１と同様にして作製したガスケットをガスケットＭとした。
(Comparative Example 5)
A gasket produced in the same manner as in Example 1 except that a resin composition containing 0.5% calcium silicate and 0.5 wt% tetrapotted zinc oxide as a filler in a heat resistant resin was used. M.
（比較例６）
耐熱樹脂にＰＥＥＫを用いたこと以外は、比較例５と同様にして作製したガスケットをガスケットＮとした。
(Comparative Example 6)
A gasket produced in the same manner as in Comparative Example 5 except that PEEK was used as the heat resistant resin was designated as gasket N.
次にこれらのガスケットＡ〜Ｎを用いて、特にリフロー時の耐熱性が必要とされるメモリーバックアップ用途のコイン形リチウム二次電池の組立を実施した。 Next, using these gaskets A to N, an assembly of a coin-type lithium secondary battery for memory backup applications that required heat resistance during reflow was implemented.
今回、組立を実施した電池の断面図を図１に示す。正極活物質にはマンガン酸化物を用い、これに導電剤、及び結着剤を加え、正極合剤を調合し、この正極合剤をペレットに加圧成型したものを正極４に用いた。また、負極５の負極活物質にはリチウムアルミ合金、イオン導電性の有機電解質を含む電解液、そしてガスケット３と同じ材質であるポリフェニレンサルファイド（ＰＰＳ）製のセパレータ６を用いており、電池の大きさとしては、外径４．４ｍｍ、厚さ１．４ｍｍのものを作製した。 A cross-sectional view of the assembled battery is shown in FIG. Manganese oxide was used as the positive electrode active material, a conductive agent and a binder were added thereto, a positive electrode mixture was prepared, and this positive electrode mixture was pressure-molded into pellets and used for the positive electrode 4. Moreover, the negative electrode active material of the negative electrode 5 uses a lithium aluminum alloy, an electrolytic solution containing an ionic conductive organic electrolyte, and a separator 6 made of polyphenylene sulfide (PPS) which is the same material as the gasket 3. As an example, an outer diameter of 4.4 mm and a thickness of 1.4 mm were produced.
これらの電池をリフロー炉に通し、電池の漏液発生を確認した結果を表１に示す。 Table 1 shows the results of confirming the occurrence of battery leakage by passing these batteries through a reflow furnace.
尚、リフロー通過時の電池表面温度として予備加熱２００℃以上６０秒、２３０℃以上４５秒、ピーク温度２６０℃（３秒以内）の温度条件で耐漏液試験を行った。 The leakage resistance test was conducted under the conditions of preheating 200 ° C. or more for 60 seconds, 230 ° C. or more for 45 seconds, and peak temperature 260 ° C. (within 3 seconds) as the battery surface temperature during reflow.
表１の結果より、ポリフェニレンスルフィド（ＰＰＳ）を用いた実施例１、３、５、７の電池と比較例１の電池を比較した場合、充填フィラーとして酸化亜鉛のみを加えたもの、あるいは珪酸カルシウムと酸化亜鉛を両方加えたものは、珪酸カルシウムのみを加えたものより耐漏液性が向上することがわかる。 From the results in Table 1, when the batteries of Examples 1, 3, 5, and 7 using polyphenylene sulfide (PPS) were compared with the battery of Comparative Example 1, only zinc oxide was added as a filler, or calcium silicate It can be seen that the addition of both zinc oxide and zinc oxide improves the leakage resistance compared to the addition of calcium silicate alone.
また、比較例３、５より充填フィラーの量が少なすぎると同様に耐漏液性が低下することがわかった。 Further, it was found that the leakage resistance is similarly reduced when the amount of the filler is too small compared to Comparative Examples 3 and 5.
次にポリエーテルエーテルケトン樹脂（ＰＥＥＫ）を用いた場合の実施例２、４、６、８の電池と比較例２、４、６の電池の耐漏液性の差に違いがなかったために、加えてピーク温度２７０℃（３秒以内）の温度条件で耐漏液試験を行った。その結果を表２に示す。 Next, there was no difference in the leakage resistance between the batteries of Examples 2, 4, 6, and 8 and the batteries of Comparative Examples 2, 4, and 6 when the polyether ether ketone resin (PEEK) was used. The leakage resistance test was conducted at a peak temperature of 270 ° C. (within 3 seconds). The results are shown in Table 2.
表２の結果より、ポリエーテルエーテルケトン樹脂（ＰＥＥＫ）を用いた場合の実施例２、４、６、８の電池と比較例２の電池を比較した場合でも、ピーク温度２７０℃のリフロー下における耐漏液試験では、差が現れ、ここでも充填フィラーとして酸化亜鉛のみを加えたもの、あるいは珪酸カルシウムと酸化亜鉛を両方加えたものは珪酸カルシウムのみを加えたものより耐漏液性が向上することがわかる。 From the results in Table 2, even when the batteries of Examples 2, 4, 6 and 8 and the battery of Comparative Example 2 were compared using the polyetheretherketone resin (PEEK), the reflow under the peak temperature of 270 ° C. In the leak-proof test, a difference appears, and here again, the one with only zinc oxide added as a filler, or the one with both calcium silicate and zinc oxide added, has improved leak resistance compared to the one with only calcium silicate added. Recognize.
また、比較例４、６より充填フィラーの量が少なすぎるとポリフェニルスルフィド（ＰＰＳ）を用いた場合と同様に耐漏液性が低下することもわかった。 Further, it was also found that when the amount of the filler filler is too small compared to Comparative Examples 4 and 6, the leakage resistance is lowered as in the case of using polyphenyl sulfide (PPS).
これより樹脂への充填フィラーの添加量の合計は、４ｗｔ％以上必要であり、また４０ｗｔ％以上であるとガスケット成型時の射出成形が困難になってしまうため、充填フィラーの添加量の合計は、４〜４０ｗｔ％以下とした。 Therefore, the total amount of filler added to the resin needs to be 4 wt% or more, and if it is 40 wt% or more, injection molding at the time of gasket molding becomes difficult. 4 to 40 wt% or less.
本発明にかかるコイン形電気化学セルは、ガスケットを形成する際に、酸化亜鉛のテトラポット状の立体形状が互いに立体障害としてぶつかり合い、互いの配向を変化させ、ガスケット内でテトラポット形状の酸化亜鉛が均一に分散させることにより、繊維や樹脂密度にばらつきのないガスケットができ、コイン形電気化学セルに組み立てられた場合にリフロー時の高温に晒された時の熱変形を緩和することにより耐熱性を大きく向上させるといった優れた効果を発揮し、高品質の電池を提供することが可能となる為、工業的利用価値は、極めて高い。 In the coin-shaped electrochemical cell according to the present invention, when a gasket is formed, the tetrapod-shaped three-dimensional shape of zinc oxide collides with each other as a steric hindrance and changes the orientation of each other, and the tetrapot-shaped oxidation in the gasket. By uniformly dispersing zinc, a gasket with no variation in fiber and resin density can be obtained. When assembled in a coin-type electrochemical cell, heat resistance is reduced by reducing thermal deformation when exposed to high temperatures during reflow. The industrial utility value is extremely high because it is possible to provide an excellent effect of greatly improving the performance and provide a high-quality battery.
１ 正極ケース
２ 封口板
３ ガスケット
４ 正極
５ 負極
６ セパレータ
７ 集電体
DESCRIPTION OF SYMBOLS 1 Positive electrode case 2 Sealing plate 3 Gasket 4 Positive electrode 5 Negative electrode 6 Separator 7 Current collector
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007014768A JP5114955B2 (en) | 2006-01-26 | 2007-01-25 | Coin-shaped electrochemical cell |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006017125 | 2006-01-26 | ||
| JP2006017125 | 2006-01-26 | ||
| JP2007014768A JP5114955B2 (en) | 2006-01-26 | 2007-01-25 | Coin-shaped electrochemical cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007227366A JP2007227366A (en) | 2007-09-06 |
| JP5114955B2 true JP5114955B2 (en) | 2013-01-09 |
Family
ID=38548949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007014768A Expired - Fee Related JP5114955B2 (en) | 2006-01-26 | 2007-01-25 | Coin-shaped electrochemical cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5114955B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100962397B1 (en) | 2007-11-28 | 2010-06-11 | 주식회사 이엠따블유에너지 | Battery cell and method for producing the same |
| KR101134125B1 (en) * | 2010-07-30 | 2012-04-09 | 캡솔루션 주식회사 | Edlc and making method therefor |
| WO2023176311A1 (en) * | 2022-03-17 | 2023-09-21 | 株式会社村田製作所 | Secondary battery |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05205976A (en) * | 1992-01-24 | 1993-08-13 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor |
| JPH05205977A (en) * | 1992-01-24 | 1993-08-13 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor |
| JPH10208705A (en) * | 1997-01-20 | 1998-08-07 | Mitsubishi Eng Plast Kk | Battery jar for sealed secondary battery and resin composition therefor |
| JP2000040525A (en) * | 1998-07-23 | 2000-02-08 | Matsushita Electric Ind Co Ltd | Organic electrolyte secondary battery |
| JP4070395B2 (en) * | 2000-08-31 | 2008-04-02 | 三洋電機株式会社 | Sealed battery |
| JP3873029B2 (en) * | 2003-02-13 | 2007-01-24 | 大塚化学株式会社 | Sealed battery gasket and sealed battery |
| JP4281428B2 (en) * | 2003-06-19 | 2009-06-17 | パナソニック株式会社 | Electrochemical element |
| JP4873838B2 (en) * | 2004-03-12 | 2012-02-08 | セイコーインスツル株式会社 | Gasket, coin or button type electrochemical cell, and method for manufacturing gasket |
-
2007
- 2007-01-25 JP JP2007014768A patent/JP5114955B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007227366A (en) | 2007-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6080284B1 (en) | Nonaqueous electrolyte secondary battery | |
| CN105977403B (en) | Nonaqueous electrolyte secondary battery | |
| JP5022035B2 (en) | Secondary battery with surface mount terminals | |
| JP6372821B2 (en) | Nonaqueous electrolyte secondary battery | |
| JP6425225B2 (en) | Non-aqueous electrolyte secondary battery | |
| JP2014170648A (en) | Sealing structure of sealed battery, and sealed battery | |
| JP2011216855A (en) | Gasket for electrochemical cell, and electrochemical cell | |
| JPWO2013046644A1 (en) | Coin battery | |
| JP5114955B2 (en) | Coin-shaped electrochemical cell | |
| CN105977413B (en) | Nonaqueous electrolyte secondary battery | |
| JP2017224430A (en) | Nonaqueous electrolyte secondary battery | |
| JP2008198552A (en) | Coin type electrochemical cell | |
| JP4976623B2 (en) | Reflow solderable electrochemical cell | |
| JP4824271B2 (en) | Gasket for electrochemical cell and electrochemical cell | |
| JP6587929B2 (en) | Nonaqueous electrolyte secondary battery | |
| JP5864174B2 (en) | Nonaqueous electrolyte secondary battery | |
| JP2009146800A (en) | Flat nonaqueous electrolyte secondary battery | |
| KR20040019964A (en) | non-aqueous electrolyte secondary battery | |
| JP4899360B2 (en) | Flat electrochemical element | |
| JP4281428B2 (en) | Electrochemical element | |
| JP2018170072A (en) | Composite solid electrolyte, method for manufacturing the same, and all-solid battery | |
| JP4873838B2 (en) | Gasket, coin or button type electrochemical cell, and method for manufacturing gasket | |
| JP2008177196A (en) | Surface-mounting square power storage cell | |
| JP2018147907A (en) | Nonaqueous electrolyte secondary battery | |
| JP4281427B2 (en) | Electrochemical element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20100121 |
|
| RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20100215 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20120628 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20120703 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20120827 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20120918 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20121001 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20151026 Year of fee payment: 3 |
|
| LAPS | Cancellation because of no payment of annual fees |