BIPOLAR SECONDARY BATTERY

• Main Authors: MIZUNO YUSUKE, KANO GENTARO, EMORI YUSUKE, ITO CHIHIRO, ARIHARA KAZUKI
• Format: Patent
• Language: English; Japanese
• Published: 16.04.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To stably detect a voltage of a single cell even in a case where exfoliation of a cathode collector or an anode collector with respect to an insulation member occurs.SOLUTION: A bipolar secondary battery 10 comprises a battery element 11 in which single cells 20 are stacked. The single cell includes a cathode 30a, an anode 30b, a separator 40 and an insulation member 50. The bipolar secondary battery comprises a voltage detection terminal 70 which is disposed, in an outer periphery of the battery element, between a front face of a cathode collector 31a at a side not in contact with the insulation member between both front and rear faces thereof and a front face of an anode collector 31b at a side not in contact with the insulation member between both front and rear faces thereof, and detecting a voltage of the single cell. The bipolar secondary battery comprises an adhesive layer 80 for bonding any one collector of the cathode collector 31a and the anode collector 31b with the voltage detection terminal.SELECTED DRAWING: Figure 4B 【課題】絶縁部材に対する正極集電体または負極集電体の剥離が生じた場合であっても、単セルの電圧を安定して検出する。【解決手段】双極型二次電池１０は、単セル２０を積層した電池要素１１を有する。単セルは、正極３０ａと、負極３０ｂと、セパレータ４０と、絶縁部材５０とを備える。双極型二次電池は、電池要素の外周において、正極集電体３１ａの表裏両面のうち絶縁部材に接しない側の表面と、負極集電体３１ｂの表裏両面のうち絶縁部材に接しない側の表面との間に配置され、単セルの電圧を検出するための電圧検出端子７０を有する。双極型二次電池は、正極集電体３１ａおよび負極集電体３１ｂのうちのいずれか一方の集電体と電圧検出端子とを接着する接着層８０を有する。【選択図】図４Ｂ