AIRTIGHT SECONDARY BATTERY

• Main Authors: NAITO TADASHI, TADA AKINORI, YAGI YOSHIN
• Format: Patent
• Language: English; Japanese
• Published: 14.03.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide an airtight secondary battery capable of completely operating a safety mechanism when an overcharge occurs.SOLUTION: The airtight secondary battery includes: an electrode body including a positive electrode plate; a battery case; a safety mechanism which operates when an inner pressure of the battery case exceeds a prescribed working pressure and executes a prescribed safety guarantee operation; a positive electrode potential member which is arranged outside the electrode body and an own potential of which becomes a positive electrode potential of the positive electrode plate; and a mixture of a gas generating agent which is arranged in contact with the positive electrode potential member and which blends a conductive agent and a binder.SELECTED DRAWING: Figure 1 【課題】過充電となった場合に、安全機構を確実に作動させることのできる密閉型二次電池を提供する。【解決手段】密閉型二次電池は、正極板を含む電極体と、電池ケースと、この電池ケースの内圧が所定の作動圧を越えた場合に作動して、所定の安全確保動作を行う安全機構とを備え、電極体外に配置され、自身の電位が正極板の正極電位となる正極電位部材と、正極電位部材に接して配置されるガス発生剤の合剤には導電剤とバインダが混合されている。【選択図】図１