JP6204575B2 - 安全性が強化されたリチウム二次電池 - Google Patents
安全性が強化されたリチウム二次電池 Download PDFInfo
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- JP6204575B2 JP6204575B2 JP2016513889A JP2016513889A JP6204575B2 JP 6204575 B2 JP6204575 B2 JP 6204575B2 JP 2016513889 A JP2016513889 A JP 2016513889A JP 2016513889 A JP2016513889 A JP 2016513889A JP 6204575 B2 JP6204575 B2 JP 6204575B2
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- secondary battery
- alloy
- positive electrode
- negative electrode
- battery according
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- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000001008 quinone-imine dye Substances 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 229920005608 sulfonated EPDM Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Description
LixMyMn2−yO4−zAz (1)
上記式中、
Mは、Al、Mg、Ni、Co、Fe、Cr、V、Ti、Cu、B、Ca、Zn、Zr、Nb、Mo、Sr、Sb、W、Ti及びBiからなる群から選択される1つ以上の元素であり、
Aは、−1又は−2価の1つ以上のアニオンであり、
0.9≦x≦1.2、0<y<2、0≦z<0.2である。
(1−x)LiM’O2−yAy−xLi2MnO3−y’Ay’ (2)
上記式中、
M’は、MnaMbであり、
Mは、Ni、Ti、Co、Al、Cu、Fe、Mg、B、Cr、Zr、Zn及び2周期の遷移金属からなる群から選択される1つ以上であり、
Aは、PO4、BO3、CO3、F及びNO3のアニオンからなる群から選択される1つ以上であり、
0<x<1、0<y≦0.02、0<y’≦0.02、0.5≦a≦1.0、0≦b≦0.5、a+b=1である。
BiとPbがモル比で40:60の組成をなす合金からなる正極タブ及び負極タブを含む電極組立体をパウチ型二次電池に内蔵して二次電池を製造した。
正極タブ及び負極タブが、BiとPbがモル比で60:40の組成をなす合金からなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブが、BiとSnがモル比で50:50の組成をなす合金からなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブが、BiとSnがモル比で30:70の組成をなす合金からなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブ及び負極タブが、BiとPbがモル比で70:30の組成をなす合金からなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブ及び負極タブが、BiとPbがモル比で30:70の組成をなす合金からなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブが、BiとSnがモル比で20:80の組成をなす合金からなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブが、BiとSnがモル比で80:20の組成をなす合金からなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブ及び負極タブがBiのみからなること以外は、実施例1と同様の方法で二次電池を製造した。
正極タブがアルミニウムからなり、負極タブが銅からなること以外は、実施例1と同様の方法で二次電池を製造した。
実施例1〜4及び比較例1〜6で製造された二次電池の過充電による安全性テストのために、SOC 0%及び1Cの条件で、それぞれ6.3V CC/CVで充電を行って6.3Vの過充電状態を2時間持続し、その結果を下記の表1に示す。
実施例1〜4及び比較例1〜6で製造された二次電池の短絡(Short Circuit)による安全性テストのために、SOC100%、常温で1ohm以下の条件で、二次電池を0.1V以下で短絡させ、その結果を下記の表2に示す。
110 電極組立体
112 電極リード
114 電極リード
115 絶縁フィルム
116 負極電極タブ
117 正極電極タブ
120 パウチ型ケース
Claims (18)
- 正極活物質が塗布されていない正極タブがそれぞれ形成されている1つ以上の正極、負極活物質が塗布されていない負極タブがそれぞれ形成されている1つ以上の負極、及び前記正極と負極との間にそれぞれ介在している1つ以上の分離膜を含む電極組立体が、電解液と共に電池ケースの内部に密封されており、
前記正極タブ及び負極タブが、電池ケースの外部に突出した正極リード及び負極リードにそれぞれ接続されており、
前記正極タブ、負極タブ、正極リード、及び負極リードからなる群から選択される1つ以上の電極端子が、溶融点が摂氏80度以上〜400度以下であるBi合金又はPb合金からなる二次電池であって、
前記Bi合金又はPb合金からなる電極端子が、アルミニウム(Al)、銅(Cu)またはニッケル(Ni)でメッキされたことを特徴とする、二次電池。 - 前記Bi合金が、鉛(Pb)、錫(Sn)、及びカドミウム(Cd)からなる群から選択される1つ以上の金属を含有する合金であり、前記Pb合金が、ビスマス(Bi)、錫(Sn)、及びカドミウム(Cd)からなる群から選択される1つ以上の金属を含有する合金であることを特徴とする、請求項1に記載の二次電池。
- 前記Bi合金又はPb合金からなる電極端子が、正極タブ及び/又は正極リードであることを特徴とする、請求項1に記載の二次電池。
- 前記Bi合金又はPb合金が、BiとPbの合金又はBiとSnの合金であることを特徴とする、請求項3に記載の二次電池。
- 前記正極タブ及び/又は正極リードがアルミニウム(Al)でメッキされたことを特徴とする、請求項3に記載の二次電池。
- 前記Bi合金又はPb合金からなる電極端子が、負極タブ及び/又は負極リードであることを特徴とする、請求項1に記載の二次電池。
- 前記Bi合金又はPb合金が、BiとPbの合金であることを特徴とする、請求項6に記載の二次電池。
- 前記負極タブ及び/又は負極リードが、銅(Cu)又はニッケル(Ni)でメッキされたことを特徴とする、請求項6に記載の二次電池。
- 前記BiとPbの組成が、モル比で40:60〜60:40であることを特徴とする、請求項4又は7に記載の二次電池。
- 前記BiとSnの組成が、モル比で50:50〜30:70であることを特徴とする、請求項4に記載の二次電池。
- 前記正極活物質が、下記化学式1又は2で表されるリチウム遷移金属酸化物を含むことを特徴とする、請求項1に記載の二次電池:
LixMyMn2−yO4−zAz (1)
上記式中、
Mが、Al、Mg、Ni、Co、Fe、Cr、V、Ti、Cu、B、Ca、Zn、Zr、Nb、Mo、Sr、Sb、W、Ti及びBiからなる群から選択される1つ以上の元素であり、
Aが、−1又は−2価の1つ以上のアニオンであり、
0.9≦x≦1.2、0<y<2、0≦z<0.2であり、
(1−x)LiM’O2−yAy−xLi2MnO3−y’Ay’ (2)
上記式中、
M’が、MnaMbであり、
Mが、Ni、Ti、Co、Al、Cu、Fe、Mg、B、Cr、Zr及びZnからなる群から選択される1つ以上であり、
Aが、PO4、BO3、CO3、F及びNO3のアニオンからなる群から選択される1つ以上であり、
0<x<1、0<y≦0.02、0<y’≦0.02、0.5≦a≦1.0、0≦b≦0.5、a+b=1である。 - 前記負極活物質が、炭素系物質、及び/又はSiを含むことを特徴とする、請求項1に記載の二次電池。
- 前記電池ケースが、樹脂層及び金属層を含むラミネートシートからなることを特徴とする、請求項1に記載の二次電池。
- 前記二次電池が、リチウムイオン電池、リチウムイオンポリマー電池、またはリチウムポリマー電池であることを特徴とする、請求項1に記載の二次電池。
- 請求項1〜14のいずれかに記載の二次電池を単位電池として含むことを特徴とする、電池モジュール。
- 請求項15に記載の電池モジュールを含むことを特徴とする、電池パック。
- 請求項16に記載の電池パックを電源として含むことを特徴とする、デバイス。
- 前記デバイスが、電気自動車、ハイブリッド電気自動車、プラグインハイブリッド電気自動車、または電力貯蔵用システムであることを特徴とする、請求項17に記載のデバイス。
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US9812692B2 (en) | 2017-11-07 |
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KR101608631B1 (ko) | 2016-04-05 |
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