JP4250528B2 - Electrochemical cell with terminal - Google Patents
Electrochemical cell with terminal Download PDFInfo
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- JP4250528B2 JP4250528B2 JP2003533364A JP2003533364A JP4250528B2 JP 4250528 B2 JP4250528 B2 JP 4250528B2 JP 2003533364 A JP2003533364 A JP 2003533364A JP 2003533364 A JP2003533364 A JP 2003533364A JP 4250528 B2 JP4250528 B2 JP 4250528B2
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- 239000000758 substrate Substances 0.000 claims description 53
- 210000004027 cell Anatomy 0.000 description 71
- 238000005476 soldering Methods 0.000 description 12
- 229910000679 solder Inorganic materials 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000010248 power generation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 229920003026 Acene Polymers 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 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
- 239000001989 lithium alloy Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- ICBUGLMSHZDVLP-UHFFFAOYSA-N [Si]=O.[Mn] Chemical compound [Si]=O.[Mn] ICBUGLMSHZDVLP-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- QEXMICRJPVUPSN-UHFFFAOYSA-N lithium manganese(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Li+] QEXMICRJPVUPSN-UHFFFAOYSA-N 0.000 description 1
- PSVBHJWAIYBPRO-UHFFFAOYSA-N lithium;niobium(5+);oxygen(2-) Chemical compound [Li+].[O-2].[O-2].[O-2].[Nb+5] PSVBHJWAIYBPRO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 nickel metal hydride Chemical class 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000003586 protic polar solvent Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、ボタン型あるいはコイン型電気化学セルに係り、回路基板上に表面実装する為の端子を有する端子付電気化学セルに関する。
【0002】
【従来の技術】
近年、携帯電話等のモバイル機器の小型化、薄型化、高機能化は目覚しく、それに伴い機器に搭載される部品についても高密度化、高機能化が急速に進展している。
【0003】
また、これら部品をプリント基板上に搭載する方法も表面実装化が一層進んでおり、特にハンダ付けプロセスについては、多くの電子部品を高密度に且つ一括してハンダ付可能な方法として、ハンダをあらかじめ基板上に印刷した後、ハンダの融点以上の温度に設定されたリフロー熱源によりハンダ付けを行なう方法(以下リフローハンダ付という)が多く採用されている。
【0004】
一方、これらモバイル機器には様々な電池が用いられている。例えば、主電源としてアルカリ電池やリチウム電池などの1次電池、あるいはリチウムイオン電池やニッケル水素電池などの各種2次電池が用いられており、これら電池は必要に応じて機器使用者が電池交換および/又は再充電している。主電源用途以外にも、メモリーバックアップやリアルタイムクロックのバックアップ用途などにも各種1次あるいは2次電池が用いられており、これら用途電池は予め機器に組み込まれている場合が殆どである。
【0005】
従来これらの電池を機器に実装する場合には、電池自身が高温に対する耐性が乏しいため、前述したようなリフローハンダ付けは不可能であり、電池以外の部品をリフローハンダ付した後手作業にてハンダ付け、あるいはホルダをリフローハンダ付後、手作業にて電池を該ホルダに装着しており、作業の効率面において問題を有していた。
【0006】
かかる状況下、リフローハンダ付けを可能にする電池の研究が鋭意なされており、例えば特開平8−17470号公報、及び特開平8−306384号公報で開示されているように、リフローハンダ付けが可能である電池が開発されている。
【0007】
【発明が解決しようとする課題】
一般的な電子部品の多くが方形状であるのに対し、これら電池形状は略コイン型或いはボタン型であるため、基板上に表面実装する際のデッドスペースが多いことに加え、基板に表面実装するための端子が占有するスペースが大きいという問題点を有している。特に電子機器の小サイズ化が著しい最近では上記問題の解決が強く望まれている。
【0008】
【課題を解決するための手段】
本発明者らは上述の実状を鑑み鋭意研究を続けた結果、本発明を完成したものである。本発明の目的は、耐熱性に優れ且つリフローハンダ付が可能であり、基板上に表面実装する際、占有スペースが最小限である端子付電気化学セルを提供するにある。
【0009】
上記目的は、正極と負極となる2つのセルケースを有する所定高さのボタン型或いはコイン型の電気化学セルと、該電気化学セルを基板上に表面実装するために2つのセルケースにそれぞれ溶接された2つの端子とを備えた端子付電気化学セルにおいて、前記2つのセルケースの一方は電気化学セルを基板上に表面実装するときに基板に近接しないセルケースで、前記2つのセルケースの他方は電気化学セルを基板上に表面実装するときに基板に近接するケースであり、前記2つの端子の一方は、基板に近接しないセルケースのフラット面に溶接されたA面と、該A面と連続し且つセル高さ方向に面するB面と、該B面と連続し且つA面と同一平行方向に面する基板接地用のC面とを有し、A−B−C面全てを含む断面が略コの字形状であり、前記2つの端子の他方は、基板に近接するセルケースに溶接された面と、該面と連続する基板接地用の面とを有しており、また、基板に近接しないセルケースに溶接された一方の端子は少なくともB面に開口部を有し、該開口部のセル高さ方向の長さLbが電気化学セルの高さHcに対しLb>Hcを満たし、該開口部と電気化学セルの中心からの距離Rbが電気化学セルの半径Rに対しRb≦Rを満たしており、さらに、基板に近接しないセルケースに溶接された一方の端子のC面は、基板に近接するセルケースと基板との間の空隙部に入るように構成されている、ことを特徴とする端子付電気化学セルにより達成される。
【0011】
【発明の実施の形態】
本発明において、基板に近接しないセルケースに溶接される端子1は、該セルケースフラット面に接し且つ平行であるA面、およびA面と連続し且つ同一平面上にないセル厚み
方向に面するB面、およびB面とは連続し且つ同一平面上になく、前述A面と同一平行方向に面するC面の3面を有し、且つA−B−C全てを含む断面が略コの字形状である。
【0012】
ここで、同一平行方向とは、B面を含む面で区切られる2つの空間に対して、
A面とC面が同じ空間方向に存在することをいい、A面とC面は特に完全に平行である必要はない。
【0013】
該端子の形状は、A−B−C全てを含む断面が略コの字型形状であるが、断面上のA面とC面の長さの同異は特に問わない。また、B面の垂直高さは該セルの肩高さより大きいことが好ましく、更にはセル高さよりも大きいことが好ましいが、高すぎる場合、端子付セルの全高が大きくなってしまう。B面の垂直高さは、寸法上のバランス、ハンダ付け強度等を考慮した場合、基板に近接するセルケースに溶接される端子2の段差+セル厚み±200μm程度であるのが好ましい。
【0014】
本発明において、基板に近接するセルケースに溶接される端子2は、セルケースに溶接される面と基板に接地される面の間に少なくともひとつの段差を有することが好ましい。端子の段差とは端子2の接地面とセルケースに溶接される面との垂直距離のことをいう。
【0015】
段差の寸法は特に限定されないが、200〜500μmとするのが以下に述べる理由より好都合である。段差が200μmより小さい場合には基板に近接しないセルケースと該セルケースに溶接される端子のC面の距離が短い為に、リフローハンダ付け作業後、基板に近接しないセルケースと該セルケースに溶接される端子のC面が直接接触することによる短絡、或いは一旦溶融したハンダを介して短絡してしまう可能性が高くなる。
【0016】
また、500μm以上の場合には端子付セルの高さ寸法が大きくなってしまうため好ましくない。該端子が段差を有さない場合は、もう一方の基板に近接しないセルケースに溶接される端子のC面が、基板と基板に近接するセルケースの間の空隙部に入ることが出来ないため、結果的に端子付セルが基板上で占める面積が大きくなってしまう。
【0017】
本発明において、端子1と端子2の位置関係は特に問わない。端子間での短絡を防止するためには、端子1と端子2が180度の角度を成す様に配置するのが好ましいが、基板のスペース形状によっては、例えば端子1と端子2が90度の角度を成す様に配置をしても構わない。
【0018】
本発明において用いられる端子材料は、一般に用いられる金属材料であれば特に限定はされないが、各種のステンレス材、ニッケル材、ニッケル−鉄合金、銅などが好ましく用いられる。端子の厚みは特に限定されないが、通常50〜300μmの厚みである場合が溶接条件を設定しやすく好ましい。また、少なくとも端子が基板に接地する面には基板と端子付電池の充分な接着強度を持たせるためにハンダ等のメッキがなされている。
【0019】
本発明において、基板に近接しないセルケースに溶接される端子1のB面に開口部を持つので、端子付セルが基板に表面実装される場合の占有する面積をより小さくすることが可能となる。該開口部の垂直高さLbは、少なくとも正極セルケース及び負極セルケースの直径が大きい方のセルケース高さHに対してLb>Hであれば良いが、好ましくはセル高さHcに対し、Lb>Hcであるのが好ましい。この場合、B面の開口部とセル中心からの距離Rbはセル単体の半径R以下に出来るため、端子付セルが基板上で占める面積を小さくすることが出来る。
【0020】
本発明における発電素子は、電気化学エネルギーを蓄え外部にエネルギーを取り出すことが可能であれば特に限定されず1次、2次の種は問わないが、リフローハンダ付け処理
を考慮すると電解液が非プロトン性溶媒からなる有機電解質電池であることが好ましい。
【0021】
例えば、正極に二酸化マンガン、負極に金属リチウムを用いたリチウム一次電池や、正極にマンガン酸化物、負極にリチウムアルミ合金や珪素酸化物を用いたマンガン−リチウム合金系やマンガン−珪素酸化物系などの3V級電池、正・負極に活性炭の如き多孔質炭素材やポリアセン系有機半導体を用いた有機系キャパシタ、その他ニオブ酸化物−リチウム合金系、マンガン酸化物−チタン酸リチウム系などが挙げられる。
【0022】
本発明における発電素子の形状は特に限定されず、例えば、タブレット状に成形した正極及び負極電極を電解液を含浸したセパレータを介して対向させたものがあげられる。この場合、セパレータに接していないもう一方の電極面を缶に接着する場合が多い。
【0023】
また該発電素子は、箔やメッシュなどの集電体に成形した帯状正極及び負極電極をセパレータを介して巻回したものでもよく、帯状電極の最外周部を正極セルケースおよび/または負極セルケース内面に直接接触させて密閉するのが作業上簡便である。
【0024】
本発明に用いられる正極セルケース及び負極セルケースは、一般に電池に用いられる金属材料であれば特に限定されないが、好ましくは耐食性、耐孔食性等に優れている各種ステンレス材である。
【0025】
また、これら正極セルケース及び負極セルケースは短絡することなく発電素子を外雰囲気と遮断し、機密性、液密性を保持する為にガスケットを介してかしめ等プレスを行なうのが通常である。
【0026】
ガスケット材に用いる材料としては、例えばポリエーテルエーテルケトン、ポリフェニレンサルファイド、フッ素樹脂等が挙げられ、成形性を良くするために必要に応じてガラス繊維を添加して成形したものを用いても良い。
【0027】
以下、図面により本発明の実施の一例を説明する。但し、本発明はこれら実施例に限定されるものではない。
(参考例1)
図1は正極及び負極の主成分がポリアセン系有機半導体である有機系キャパシタを発電素子に用いた直径4.8mm、高さ1.4mmコイン型セルに端子を溶接した参考例である。
【0028】
端子付セルの総高さは1.7mmであった。発電素子は例えば特願平7−137184の実施例に開示されている方法にて作製した。端子は厚みが100μmのSUS304材をプレス成形により作製したものを用いた。セルへの端子の溶接YAGレーザー溶接機により行なった。この場合、基板上においてセル本体のみが占める面積を100とした場合、端子付セルが占める面積比は110であった。
(実施例1)
図2は参考例1と同様に発電素子としてポリアセン系有機半導体からなる有機性キャパシタを発電素子に用いた実施形態である。この場合、基板上においてセル本体のみが占める面積を100とした場合、端子付セルが占める面積比は103%であった。
(実施例2)
図3は参考例1と同様に発電素子としてポリアセン系有機半導体からなる有機系キャパシタを発電素子に用いた別の実施形態である。端子1と端子2は90度の角度を成して配置されている。この場合、基板上においてセル本体のみが占める面積を100とした場合、端子付セルが占める面積比は106%であった。
(比較例1)
図4は従来形状の端子を溶接した端子付セルの一例である。この場合、基板上においてセル本体のみが占める面積を100とした場合、端子付セルが占める面積比は137%であった。
【図面の簡単な説明】
【図1】 本発明に係る端子付電気化学セルの図面である。上から順番に、上面図、側面図、底面図を示す。斜線部分は基板に接地するためのハンダメッキが着く面を示す。
【図2】 本発明に係る別の実施形態の図面である。上から順番に、上面図、側面図、底面図を示す。斜線部分は基板に接地するためのハンダメッキが着く面を示す。
【図3】 本発明に係る更に別の実施形態の図面である。上から順番に、上面図、側面図、底面図を示す。斜線部分は基板に接地するためのハンダメッキが着く面を示す。
【図4】 従来の端子付セルを示す図である。上から順番に、上面図、側面図、底面図を示す。斜線部分は基板に接地するためのハンダメッキが着く面を示す。
【符号の説明】
1 正極セルケース
2 負極セルケース
3 端子1
4 端子2
5 ガスケット
6 端子1−A面
7 端子1−B面
8 端子1−C面
9 ハンダメッキ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a button-type or coin-type electrochemical cell, and more particularly to a terminal-attached electrochemical cell having terminals for surface mounting on a circuit board.
[0002]
[Prior art]
In recent years, mobile devices such as mobile phones have been remarkably reduced in size, thickness, and functionality, and accordingly, components mounted on the devices have been rapidly increasing in density and functionality.
[0003]
In addition, the method of mounting these components on a printed circuit board has been further progressed in surface mounting. In particular, with respect to the soldering process, as a method that can solder a large number of electronic components at a high density, soldering can be performed. A method of performing soldering (hereinafter referred to as reflow soldering) using a reflow heat source set to a temperature equal to or higher than the melting point of solder after printing on the substrate in advance is often employed.
[0004]
On the other hand, various batteries are used for these mobile devices. For example, primary batteries such as alkaline batteries and lithium batteries, or various secondary batteries such as lithium ion batteries and nickel metal hydride batteries are used as the main power source. / Or recharging. In addition to the main power supply application, various primary or secondary batteries are used for a memory backup, a real-time clock backup application, and the like. In many cases, these batteries are incorporated in a device in advance.
[0005]
Conventionally, when these batteries are mounted on a device, the batteries themselves have poor resistance to high temperatures, so reflow soldering as described above is impossible, and soldering is performed manually after reflow soldering parts other than the battery. After attaching or reflow soldering the holder, the battery is manually attached to the holder, which has a problem in terms of work efficiency.
[0006]
Under such circumstances, research on a battery that enables reflow soldering has been conducted intensively. For example, as disclosed in Japanese Patent Application Laid-Open Nos. 8-17470 and 8-306384, reflow soldering is possible. A battery is being developed.
[0007]
[Problems to be solved by the invention]
While many of the common electronic components are square, these battery shapes are generally coin-shaped or button-shaped, so there is a lot of dead space when surface-mounted on the board, and surface mounting on the board. Therefore, there is a problem that a large space is occupied by a terminal for performing the above operation. In particular, in recent years when electronic devices are remarkably reduced in size, it is strongly desired to solve the above problems.
[0008]
[Means for Solving the Problems]
The inventors of the present invention have completed the present invention as a result of intensive studies in view of the above-described actual situation. An object of the present invention is to provide an electrochemical cell with a terminal that has excellent heat resistance and can be reflow soldered, and has a minimum occupied space when surface-mounted on a substrate.
[0009]
The above purpose is to form a button-type or coin-type electrochemical cell having two cell cases as a positive electrode and a negative electrode, and to weld the two cell cases to surface-mount the electrochemical cell on a substrate. One of the two cell cases is a cell case that is not close to the substrate when the electrochemical cell is surface-mounted on the substrate. The other is a case close to the substrate when the electrochemical cell is surface-mounted on the substrate, and one of the two terminals is an A surface welded to a flat surface of the cell case not adjacent to the substrate, and the A surface. and the B surface facing the continuous and cell height direction, and continuous with the surface B possess a C surface of the substrate ground facing in the same direction parallel to the a plane, the a-B-C plane all The cross section that is included is a substantially U-shape. , The other of the two terminals has a surface which is welded to the cell case adjacent to the substrate has a surface of substrate ground continuous with said surface, also be welded to the cell case, not close to the substrate and one terminal has an opening at least on surface B, the cells in the height direction length Lb of the opening portion meets Lb> Hc to the height Hc of the electrochemical cell, opening the electrochemical The distance Rb from the center of the cell satisfies Rb ≦ R with respect to the radius R of the electrochemical cell, and the C surface of one terminal welded to the cell case not close to the substrate is a cell case close to the substrate. This is achieved by a terminal-attached electrochemical cell characterized in that it is configured to enter a gap between the substrate and the substrate .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the
[0012]
Here, the same parallel direction refers to two spaces separated by a plane including the B plane.
It means that the A plane and the C plane exist in the same spatial direction, and the A plane and the C plane do not need to be completely parallel.
[0013]
The shape of the terminal is substantially U-shaped in cross section including all A-B-C, but the difference in length between the A plane and the C plane on the cross section is not particularly limited. Further, the vertical height of the B surface is preferably larger than the shoulder height of the cell, and more preferably larger than the cell height. However, if it is too high, the total height of the cell with terminals becomes large. In consideration of dimensional balance, soldering strength, etc., the vertical height of the B surface is preferably about the level difference of the
[0014]
In the present invention, the
[0015]
The dimension of the step is not particularly limited, but it is convenient to set it to 200 to 500 μm for the reason described below. When the step is smaller than 200 μm, the distance between the cell case not close to the substrate and the C surface of the terminal welded to the cell case is short. Therefore, after the reflow soldering operation, the cell case not close to the substrate and the cell case There is a high possibility of a short circuit due to direct contact of the C surface of the terminal to be welded or a short circuit through the solder once melted.
[0016]
On the other hand, when the thickness is 500 μm or more, the height dimension of the cell with terminal is increased, which is not preferable. If the terminal does not have a step, the C surface of the terminal welded to the cell case that is not adjacent to the other substrate cannot enter the gap between the substrate and the cell case adjacent to the substrate. As a result, the area occupied by the cell with terminals on the substrate increases.
[0017]
In the present invention, the positional relationship between the
[0018]
The terminal material used in the present invention is not particularly limited as long as it is a commonly used metal material, but various stainless materials, nickel materials, nickel-iron alloys, copper, and the like are preferably used. Although the thickness of a terminal is not specifically limited, The case where it is the thickness of 50-300 micrometers normally is easy to set welding conditions, and is preferable. Further, at least the surface where the terminal is grounded to the substrate is plated with solder or the like in order to give sufficient adhesion strength between the substrate and the battery with the terminal.
[0019]
In the present invention, since the opening is formed on the B surface of the
[0020]
The power generation element in the present invention is not particularly limited as long as it can store electrochemical energy and extract the energy to the outside, and it does not matter whether it is a primary or secondary species. An organic electrolyte battery made of a protic solvent is preferred.
[0021]
For example, a lithium primary battery using manganese dioxide for the positive electrode and metal lithium for the negative electrode, a manganese oxide for the positive electrode, a manganese-lithium alloy system or a manganese-silicon oxide system using a lithium aluminum alloy or silicon oxide for the negative electrode, etc. 3V class batteries, organic capacitors using porous carbon materials such as activated carbon for the positive and negative electrodes and polyacene organic semiconductors, other niobium oxide-lithium alloy systems, manganese oxide-lithium titanate systems, and the like.
[0022]
The shape of the power generation element in the present invention is not particularly limited, and examples thereof include those in which a positive electrode and a negative electrode formed into a tablet shape are opposed to each other through a separator impregnated with an electrolytic solution. In this case, the other electrode surface not in contact with the separator is often adhered to the can.
[0023]
In addition, the power generating element may be one in which a strip-like positive electrode and a negative electrode formed on a current collector such as a foil or a mesh are wound through a separator, and the outermost periphery of the strip-like electrode is a positive electrode cell case and / or a negative electrode cell case. It is convenient in terms of operation to directly contact the inner surface for sealing.
[0024]
The positive electrode cell case and the negative electrode cell case used in the present invention are not particularly limited as long as they are metal materials generally used for batteries, but are preferably various stainless materials excellent in corrosion resistance, pitting corrosion resistance and the like.
[0025]
In addition, the positive electrode cell case and the negative electrode cell case are usually subjected to pressing such as caulking through a gasket in order to shield the power generating element from the outside atmosphere without short-circuiting and maintain confidentiality and liquid tightness.
[0026]
Examples of the material used for the gasket material include polyetheretherketone, polyphenylene sulfide, and a fluororesin. A material formed by adding glass fiber as necessary may be used to improve moldability.
[0027]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the present invention is not limited to these examples.
( Reference Example 1)
FIG. 1 is a reference example in which a terminal is welded to a coin-type cell having a diameter of 4.8 mm and a height of 1.4 mm using an organic capacitor in which the main component of the positive electrode and the negative electrode is a polyacene organic semiconductor as a power generation element.
[0028]
The total height of the cell with terminals was 1.7 mm. The power generation element was produced by the method disclosed in the example of Japanese Patent Application No. 7-137184, for example. As the terminal, a SUS304 material having a thickness of 100 μm produced by press molding was used. Welding of terminals to cells was performed by a YAG laser welder. In this case, when the area occupied only by the cell main body on the substrate was 100, the area ratio occupied by the terminal-attached cell was 110.
(Example 1 )
Figure 2 is a implementation mode using the organic capacitor composed of a polyacene-based organic semiconductor as a power device in the same manner as in Reference Example 1 to the power generation element. In this case, when the area occupied only by the cell main body on the substrate was 100, the area ratio occupied by the cell with terminals was 103%.
(Example 2 )
FIG. 3 shows another embodiment in which an organic capacitor made of a polyacene organic semiconductor is used as a power generation element as in Reference Example 1.
(Comparative Example 1)
FIG. 4 shows an example of a cell with a terminal in which a conventional terminal is welded. In this case, when the area occupied only by the cell main body on the substrate was set to 100, the area ratio occupied by the cell with terminals was 137%.
[Brief description of the drawings]
1 is a drawing of an electrochemical cell with terminals according to the present invention. A top view, a side view, and a bottom view are shown in order from the top. A hatched portion indicates a surface to which solder plating for grounding the substrate is attached.
FIG. 2 is a drawing of another embodiment according to the present invention. A top view, a side view, and a bottom view are shown in order from the top. A hatched portion indicates a surface to which solder plating for grounding the substrate is attached.
FIG. 3 is a drawing of still another embodiment according to the present invention. A top view, a side view, and a bottom view are shown in order from the top. A hatched portion indicates a surface to which solder plating for grounding the substrate is attached.
FIG. 4 is a diagram showing a conventional cell with a terminal. A top view, a side view, and a bottom view are shown in order from the top. A hatched portion indicates a surface to which solder plating for grounding the substrate is attached.
[Explanation of symbols]
1 Positive
4
5
Claims (1)
前記2つのセルケースの一方は電気化学セルを基板上に表面実装するときに基板に近接しないセルケースで、前記2つのセルケースの他方は電気化学セルを基板上に表面実装するときに基板に近接するケースであり、
前記2つの端子の一方は、基板に近接しないセルケースのフラット面に溶接されたA面と、該A面と連続し且つセル高さ方向に面するB面と、該B面と連続し且つA面と同一平行方向に面する基板接地用のC面とを有し、A−B−C面全てを含む断面が略コの字形状であり、
前記2つの端子の他方は、基板に近接するセルケースに溶接された面と、該面と連続する基板接地用の面とを有しており、
また、基板に近接しないセルケースに溶接された一方の端子は少なくともB面に開口部を有し、該開口部のセル高さ方向の長さLbが電気化学セルの高さHcに対しLb>Hcを満たし、該開口部と電気化学セルの中心からの距離Rbが電気化学セルの半径Rに対しRb≦Rを満たしており、
さらに、基板に近接しないセルケースに溶接された一方の端子のC面は、基板に近接するセルケースと基板との間の空隙部に入るように構成されている、
ことを特徴とする端子付電気化学セル。A button-type or coin-type electrochemical cell having two cell cases to be a positive electrode and a negative electrode, and two welded to the two cell cases, respectively, for surface mounting the electrochemical cell on a substrate In an electrochemical cell with a terminal provided with a terminal,
One of the two cell cases is a cell case that is not close to the substrate when the electrochemical cell is surface-mounted on the substrate, and the other of the two cell cases is a substrate when the electrochemical cell is surface-mounted on the substrate. A close case,
One of the two terminals includes an A surface welded to a flat surface of a cell case that is not adjacent to the substrate, a B surface that is continuous with the A surface and faces the cell height direction, and is continuous with the B surface; It possesses a C surface of the substrate ground facing the a surface in the same direction parallel cross section including the a-B-C plane everything is substantially U-shape,
The other of the two terminals has a surface welded to a cell case adjacent to the substrate, and a surface for grounding the substrate continuous with the surface,
One terminal welded to the cell case not close to the substrate has an opening at least on the B surface, and the length Lb in the cell height direction of the opening is Lb> with respect to the height Hc of the electrochemical cell. It meets hc, meets the Rb ≦ R distance Rb from the center of the opening and the electrochemical cell to the radius R of the electrochemical cell,
Furthermore, the C surface of one terminal welded to the cell case not close to the substrate is configured to enter a gap between the cell case adjacent to the substrate and the substrate.
An electrochemical cell with a terminal characterized by the above.
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JP2001299707 | 2001-09-28 | ||
JP2001299707 | 2001-09-28 | ||
PCT/JP2002/009811 WO2003030281A1 (en) | 2001-09-28 | 2002-09-24 | Electrochemical cell with terminals |
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JP2008205479A Division JP5268488B2 (en) | 2001-09-28 | 2008-08-08 | Electrochemical cell with terminal |
JP2008205484A Division JP5268489B2 (en) | 2001-09-28 | 2008-08-08 | Electrochemical cell with terminal |
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JPWO2003030281A1 JPWO2003030281A1 (en) | 2005-01-20 |
JP4250528B2 true JP4250528B2 (en) | 2009-04-08 |
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JP2003533364A Expired - Fee Related JP4250528B2 (en) | 2001-09-28 | 2002-09-24 | Electrochemical cell with terminal |
JP2008205484A Expired - Fee Related JP5268489B2 (en) | 2001-09-28 | 2008-08-08 | Electrochemical cell with terminal |
JP2008205479A Expired - Fee Related JP5268488B2 (en) | 2001-09-28 | 2008-08-08 | Electrochemical cell with terminal |
JP2011072308A Withdrawn JP2011151037A (en) | 2001-09-28 | 2011-03-29 | Electrochemical cell with terminal |
JP2011072303A Withdrawn JP2011129540A (en) | 2001-09-28 | 2011-03-29 | Electrochemical cell with terminal |
JP2012079631A Withdrawn JP2012138373A (en) | 2001-09-28 | 2012-03-30 | Electrochemical cell with terminal |
JP2012079632A Expired - Fee Related JP5442793B2 (en) | 2001-09-28 | 2012-03-30 | Electrochemical cell with terminal |
JP2013245034A Pending JP2014075598A (en) | 2001-09-28 | 2013-11-27 | Electrochemical cell with terminal |
JP2013245031A Pending JP2014112543A (en) | 2001-09-28 | 2013-11-27 | Electrochemical cell with terminal |
JP2013245029A Pending JP2014112676A (en) | 2001-09-28 | 2013-11-27 | Electrochemical cell with terminal |
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JP2008205484A Expired - Fee Related JP5268489B2 (en) | 2001-09-28 | 2008-08-08 | Electrochemical cell with terminal |
JP2008205479A Expired - Fee Related JP5268488B2 (en) | 2001-09-28 | 2008-08-08 | Electrochemical cell with terminal |
JP2011072308A Withdrawn JP2011151037A (en) | 2001-09-28 | 2011-03-29 | Electrochemical cell with terminal |
JP2011072303A Withdrawn JP2011129540A (en) | 2001-09-28 | 2011-03-29 | Electrochemical cell with terminal |
JP2012079631A Withdrawn JP2012138373A (en) | 2001-09-28 | 2012-03-30 | Electrochemical cell with terminal |
JP2012079632A Expired - Fee Related JP5442793B2 (en) | 2001-09-28 | 2012-03-30 | Electrochemical cell with terminal |
JP2013245034A Pending JP2014075598A (en) | 2001-09-28 | 2013-11-27 | Electrochemical cell with terminal |
JP2013245031A Pending JP2014112543A (en) | 2001-09-28 | 2013-11-27 | Electrochemical cell with terminal |
JP2013245029A Pending JP2014112676A (en) | 2001-09-28 | 2013-11-27 | Electrochemical cell with terminal |
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Cited By (1)
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US8325464B2 (en) | 2007-12-18 | 2012-12-04 | Panasonic Corporation | Coin type electric double-layered capacitor, and capacitor-packaged element |
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WO2003030281A1 (en) * | 2001-09-28 | 2003-04-10 | Kanebo, Limited | Electrochemical cell with terminals |
JP4570902B2 (en) * | 2004-04-30 | 2010-10-27 | セイコーインスツル株式会社 | Electrochemical cell with lead terminals |
JP4726622B2 (en) * | 2005-12-14 | 2011-07-20 | 三洋電機株式会社 | Leaded battery |
JP2008108549A (en) * | 2006-10-25 | 2008-05-08 | Matsushita Electric Ind Co Ltd | Battery having terminal for surface mount |
JP5235023B2 (en) * | 2010-06-14 | 2013-07-10 | セイコーインスツル株式会社 | Electrochemical cell with lead terminals |
JP2012195202A (en) * | 2011-03-17 | 2012-10-11 | Taiyo Yuden Co Ltd | Electrochemical cell with terminal |
JP2012204235A (en) * | 2011-03-28 | 2012-10-22 | Fdk Tottori Co Ltd | Electrochemical device with terminals |
JP5740775B2 (en) * | 2013-10-17 | 2015-07-01 | セイコーインスツル株式会社 | Electrochemical cell with lead terminals |
JP2018142608A (en) * | 2017-02-27 | 2018-09-13 | 株式会社村田製作所 | Surface mounted electronic component |
CN113013556B (en) * | 2019-12-19 | 2022-07-12 | 荣耀终端有限公司 | Button battery welding structure, electronic equipment and button battery mounting method |
JPWO2022196358A1 (en) * | 2021-03-16 | 2022-09-22 |
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2002
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US8325464B2 (en) | 2007-12-18 | 2012-12-04 | Panasonic Corporation | Coin type electric double-layered capacitor, and capacitor-packaged element |
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CN1275338C (en) | 2006-09-13 |
JP2011151037A (en) | 2011-08-04 |
JP2014112543A (en) | 2014-06-19 |
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JP2008294002A (en) | 2008-12-04 |
JPWO2003030281A1 (en) | 2005-01-20 |
JP5268489B2 (en) | 2013-08-21 |
CN1557030A (en) | 2004-12-22 |
JP2012138373A (en) | 2012-07-19 |
WO2003030281A1 (en) | 2003-04-10 |
JP2014075598A (en) | 2014-04-24 |
JP2011129540A (en) | 2011-06-30 |
JP5268488B2 (en) | 2013-08-21 |
JP2008294001A (en) | 2008-12-04 |
JP2012156141A (en) | 2012-08-16 |
JP5442793B2 (en) | 2014-03-12 |
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