JP2018028977A - バイポーラ電池 - Google Patents
バイポーラ電池 Download PDFInfo
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- JP2018028977A JP2018028977A JP2016159430A JP2016159430A JP2018028977A JP 2018028977 A JP2018028977 A JP 2018028977A JP 2016159430 A JP2016159430 A JP 2016159430A JP 2016159430 A JP2016159430 A JP 2016159430A JP 2018028977 A JP2018028977 A JP 2018028977A
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- 239000008151 electrolyte solution Substances 0.000 claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims description 32
- 239000003792 electrolyte Substances 0.000 claims description 15
- 230000000452 restraining effect Effects 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 7
- 238000003475 lamination Methods 0.000 abstract description 6
- 239000000243 solution Substances 0.000 abstract description 2
- 239000011347 resin Substances 0.000 description 20
- 229920005989 resin Polymers 0.000 description 20
- 230000002209 hydrophobic effect Effects 0.000 description 15
- 238000007789 sealing Methods 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 239000011149 active material Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 239000007774 positive electrode material Substances 0.000 description 7
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
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- 239000011230 binding agent Substances 0.000 description 4
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- 239000007789 gas Substances 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- OSOVKCSKTAIGGF-UHFFFAOYSA-N [Ni].OOO Chemical compound [Ni].OOO OSOVKCSKTAIGGF-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910000483 nickel oxide hydroxide Inorganic materials 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 229920000412 polyarylene Polymers 0.000 description 2
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- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
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- 238000007086 side reaction Methods 0.000 description 2
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- 238000004381 surface treatment Methods 0.000 description 2
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- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical class C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 description 1
- 229910001122 Mischmetal Inorganic materials 0.000 description 1
- 229910018007 MmNi Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- AIBQNUOBCRIENU-UHFFFAOYSA-N nickel;dihydrate Chemical compound O.O.[Ni] AIBQNUOBCRIENU-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
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- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
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Abstract
Description
正極または負極の製造過程において、正極または負極に針状のバリが形成される場合がある。上記のバイポーラ電池によれば、セパレータがこの針状のバリに接触することを抑制することができる。
(実施の形態1)
図1は、本実施の形態1に係るバイポーラ電池1が搭載された車両2を模式的に示す模式図である。この図1に示すように、車両2は、バッテリユニット3を含む。
(実施の形態2)
本実施の形態2においては、積層体と押圧板の間に断熱部材を設けることによって、最上段および最下段の単位電池の温度変動を低減し、バイポーラ電池の電気特性を安定化させる構成について説明する。
(実施の形態3)
本実施の形態3では、積層体11の放熱性の向上を図るために、集電板40にシール部材42から大きく張り出す放熱部を形成することで、積層体11の放熱性の向上が図られた構成について説明する。
(実施の形態4)
実施の形態4では、シール部材42の内側で、積層方向D1に隣り合う集電板40が短絡することを抑制する構成について説明する。
(実施の形態5)
本実施の形態5においては、集電板40の変形などのように、正極43や負極45が集電板40から剥離することを助長する現象が生じたとしても、正極43および極45と集電板40との密着性を確保された構成について説明する。
(実施の形態6)
ニッケル水素電池などの水系電池においては、たとえば、充電時において、電解液に含まれる水の電気分解が電極の副反応として起き、電解液が枯渇する場合がある。本実施の形態においては、電解液の枯渇の抑制が図られたバイポーラ電池について説明する。
Claims (11)
- 積層方向に配列された第1端部および第2端部と、前記第1端部および前記第2端部の間に前記積層方向に積層された複数の単位セルとを含む積層体と、
前記積層体の前記第1端部および前記第2端部を押圧して前記積層体を拘束する拘束具と、
を備え、
前記複数の単位セルの各々は、
前記積層方向に配列する第1主表面および第2主表面を含む集電板と、
電解液が含浸されたセパレータを含むと共に前記第1主表面に配置された単位電池と、
前記第1主表面に設けられると共に前記単位電池の周囲を取り囲むように形成されたシール部材とを含み、
前記シール部材は、前記拘束具からの押圧力によって前記積層方向に隣り合う前記集電板に密着した、バイポーラ電池。 - 前記拘束具は、前記積層体の前記第1端部を押圧する第1押圧板と、前記第2端部を押圧する第2押圧板と、前記第1押圧板および前記第2押圧板を接続する複数の接続部材とを含み、
前記複数の接続部材は、互いに間隔をあけて配置されており、
前記積層体は、外部に露出している、請求項1に記載のバイポーラ電池。 - 前記集電板および前記シール部材を前記積層方向から離れた位置から視ると、前記シール部材は前記集電板内に位置しており、
前記集電板は、前記シール部材よりも外方に張り出す放熱部を含む、請求項2に記載のバイポーラ電池。 - 前記集電板は、前記集電板のうち前記シール部材よりも外方に位置する部分を被覆する絶縁部材を含む、請求項3に記載のバイポーラ電池。
- 前記拘束具は、前記積層体の前記第1端部を押圧する第1押圧板と、前記第2端部を押圧する第2押圧板とを含み、
前記第1押圧板および前記第1端部の間と、前記第2押圧板および前記第2端部の間との少なくとも一方に配置された断熱部材をさらに備えた、請求項1から請求項4のいずれか1項に記載のバイポーラ電池。 - 前記断熱部材は、絶縁材料によって形成された、請求項5に記載のバイポーラ電池。
- 前記単位電池を前記積層方向から離れた位置から視ると、前記セパレータは、前記集電板の前記第1主表面うち、前記単位電池の設置部分から前記シール部材の設置位置までの間に位置する部分を覆うように形成された、請求項1から請求項6のいずれか1項に記載のバイポーラ電池。
- 前記シール部材は、前記セパレータの外周縁部が載せられる段差部を含む、請求項1から請求項7のいずれか1項に記載のバイポーラ電池。
- 前記積層体は、前記積層方向に配列された第1集電板および第2集電板を含み、
前記単位電池は、前記第1集電板および前記第2集電板に挟まれており、
前記単位電池は、前記第1集電板の第1主表面に形成された正極と、前記第2集電板の第2主表面に形成された負極とを含み、
前記第1集電板のうち前記正極が形成される部分と、前記第2集電板のうち前記負極が形成される部分との少なくとも一方に形成された凹凸状の粗面部をさらに備える、請求項1から請求項8のいずれか1項に記載のバイポーラ電池。 - 前記積層体は、前記積層方向に配列された第1集電板および第2集電板を含み、
前記単位電池は、前記第1集電板および前記第2集電板に挟まれており、
前記単位電池は、前記第1集電板の第1主表面に形成された正極と、前記第2集電板の第2主表面に形成された負極とを含み、
前記第1集電板の第1主表面と前記正極との間と、前記第2集電板の第2主表面と前記負極との間との少なくとも一方に形成された導電膜をさらに備える、請求項1から請求項8のいずれか1項に記載のバイポーラ電池。 - 前記集電板のうち前記単位電池の設置位置と前記シール部材との間に位置する部分に、凹部が形成されており、
前記凹部には、電解液が貯留されており、
前記セパレータは、前記凹部内の電解液と接触する、請求項1から請求項10のいずれか1項に記載のバイポーラ電池。
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