JPWO2018042763A1 - 電源装置 - Google Patents
電源装置 Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 43
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 239000011810 insulating material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 43
- 230000005494 condensation Effects 0.000 abstract description 34
- 238000009833 condensation Methods 0.000 abstract description 34
- 238000009413 insulation Methods 0.000 abstract description 33
- 210000004027 cell Anatomy 0.000 description 139
- 238000001816 cooling Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
Description
電池セル1は、幅広面である主面1Xの外形を四角形とするリチウムイオン二次電池で、主面1Xの幅よりも厚さを薄くしている。ただし、本発明の電源装置は、電池セル1をリチウムイオン二次電池には特定しない。電池セル1には現在使用され、これから開発される全ての二次電池、たとえばリチウムイオン二次電池以外の非水系電解液二次電池やニッケル水電池セルなども使用できるからである。
封口板は、外装缶11と同じように、アルミニウムやアルミニウム合金などの金属板で製作される。封口板は、外装缶11の開口部に挿入されて、封口板の外周と外装缶11の内周との境界にレーザービームを照射して、封口板を外装缶11にレーザー溶接して気密に固定している。
セパレータ2は、絶縁材を使用して全体を一体構造に成形して製作される。絶縁材は熱可塑性のプラスチックである。プラスチック製のセパレータ2は、優れた絶縁特性を実現しながら安価に多量生産できる。ただし、本発明はセパレータの絶縁材をプラスチックには特定しない。たとえば、成形できる他の全ての絶縁材、たとえばセラミックや紙なども使用できる。セパレータ2は、互いに積層される電池セル1の間に挟まれて、隣の電池セル1を絶縁して一定の間隔離して定位置に配置する。
エンドプレート4は、電池積層体9の両端に配設されて、電池セル1を積層方向に加圧して固定できる強度のプレート状で、バインドバー5に連結されて、電池セル1を加圧状態に固定する。図2に示す電源装置100は、金属製のエンドプレート4と電池積層体9との間にセパレータ2Xを配置している。エンドプレート4と電池積層体9との間に挟まれるセパレータ2Xは、本体プレート部20Xの片面、すなわち電池積層体9との対向面にのみ絶縁リブ部21と位置決めリブを設けている。
バインドバー5は、図1に示すように、両端をエンドプレート4に連結して、エンドプレート4を介して電池積層体9を締結する。バインドバー5は金属板をプレス加工して製作される。このバインドバー5には、鉄などの金属板、好ましくは、鋼板が使用できる。
図1と図8のバインドバー5は、電池積層体9の側面に配置される側面プレート部5Xと、この側面プレート部5Xの両端部にあってエンドプレート4の外側端面に配置されてエンドプレート4に止具19を介して固定される固定部5Cとを備えている。側面プレート部5Xは、下縁を内側に折曲して電池積層体9の底面の両側、すなわち電池セル底面1Tの両端部を支持する水平プレート部5Aを設けている。金属製の水平プレート部5Aは、電池セル底面1Tとの間に配置される絶縁リブ部21を介して電池セル1から絶縁される。
Claims (9)
- 主面の幅よりも厚さの薄い外形を角形とする複数の電池セルと、
前記電池セルの間に配設してなる絶縁材の成形体であるセパレータと、
前記セパレータで絶縁された前記電池セルを、前記主面同士が対向する姿勢で複数個積層してなる電池積層体の両端に配置してなる一対のエンドプレートと、
一対の前記エンドプレートを締結するバインドバーとを備え、
前記セパレータは、両側に積層される前記電池セルの底面に配置される絶縁リブ部を両面に突出して設けており、
前記電池セルの両面に積層してなる前記セパレータの前記絶縁リブ部が、前記電池セルの底面で積層されており、
積層される一方の前記絶縁リブ部が挿入溝を有し、他方の絶縁リブ部が前記挿入溝に挿入される挿入リブを有し、前記挿入リブが前記挿入溝に挿入されて、前記絶縁リブ部が積層されて前記電池セルの底面に沿面距離をU曲状とする前記絶縁リブ部を配置してなることを特徴とする電源装置。 - 請求項1に記載される電源装置であって、
前記バインドバーが金属板で、金属製の前記バインドバーが、前記絶縁リブ部の下面に配置してなる水平プレート部を有し、
前記水平プレート部と前記絶縁リブ部との間に絶縁シートが配置され、前記絶縁シートが金属製の前記水平プレート部と前記絶縁リブ部との間を絶縁してなることを特徴とする電源装置。 - 請求項2に記載される電源装置であって、
前記バインドバーが、前記水平プレート部に連結されて前記電池セルの側面に配置される側面プレートを有し、
前記側面プレートの少なくとも底部の表面と前記水平プレート部の表面とに連続する絶縁シートを配置してなることを特徴とする電源装置。 - 請求項1ないし3のいずれかに記載される電源装置であって、
前記セパレータが、前記電池セルの側面に接触して前記電池セルを定位置に配置する位置決めリブを表面に突出して設けており、
前記位置決めリブが、上面を電池セルの外周から中心部に向かって下り勾配に傾斜する形状としてなることを特徴とする電源装置。 - 請求項1ないし4のいずれかに記載される電源装置であって、
前記バインドバーが金属板で、前記絶縁リブ部の下面に配置してなる水平プレート部を有し、
前記絶縁リブ部が、前記バインドバーの前記水平プレート部と前記電池セルの底面との間に配置されて、前記セパレータの下部の両端部に配置され、
さらに、前記セパレータは、底縁の両端部に設けてなる両側の絶縁リブ部の間に、前記電池セルの底面に接触して前記電池セルを定位置に配置する位置決めリブを表面に突出して設けており、
前記絶縁リブ部と前記位置決めリブとの間に排水隙間を設けてなることを特徴とする電源装置。 - 請求項5に記載される電源装置であって、
前記セパレータが、底部の両端部に配設してなる前記絶縁リブ部の間に、複数の前記位置決めリブを設けており、前記位置決めリブの間に排水隙間を設けてなることを特徴とする電源装置。 - 請求項1ないし6のいずれかに記載される電源装置であって、
前記セパレータが、前記電池セルの外周面に接して前記電池セルを定位置に配置する位置決めリブを有し、
前記位置決めリブの電池セル外周面との接触面に、前記電池セルの外周面に押圧されて変形する変形リブを設けてなることを特徴とする電源装置。 - 請求項1ないし7のいずれかに記載される電源装置であって、
前記セパレータが前記電池セルとの間に風路を設けてなることを特徴とする電源装置。 - 請求項1ないし8のいずれかに記載される電源装置であって、
前記電池セルが金属製の外装缶を有し、前記外装缶の表面金属を露出してなる前記電池セルの間に前記セパレータを配置してなることを特徴とする電源装置。
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