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    • 55. 发明授权
    • Hermetically sealed cell and sealing body
    • 密封电池和密封体
    • US06303246B1
    • 2001-10-16
    • US09423433
    • 2000-01-14
    • Akiyoshi TakadaKinji SaijoKazuo YoshidaNobuyuki YoshimotoYoshihiko Isobe
    • Akiyoshi TakadaKinji SaijoKazuo YoshidaNobuyuki YoshimotoYoshihiko Isobe
    • H01M212
    • H01M2/345H01M2/1241H01M2200/20
    • The object of the present invention is to provide a closed battery capable of rapidly releasing the internal pressure thereof and at the same time disconnecting the current to effectively prevent itself from temperature rising and explosion so that it may assure the safety and reliability thereof, when the internal pressure is elevated due to short circuit, overcharge, reverse charge, or the like in such a completely closed battery. The formation of a valve element 5 whose center is eccentric to the center of a metal substrate 1 produces a slit 3 having a large width portion around the circumference of a valve element 5. When the internal pressure of a battery is elevated, the valve element 5 is smoothly raised up together with a metal foil 2 from the bending fulcrum portion 4 to thereby cut a lead wire 6 or permit a braze portion 8 to detach from the lead wire 6, thus reliably disconnecting the current. Then, the metal foil is allowed to burst stably and accurately at a prescribed pressure to thereby form a valve opening portion 7 so that the internal gas of the battery can be discharged. Thus, the battery can previously be prevented from exploding.
    • 本发明的目的是提供一种能够快速释放其内部压力并且同时断开电流以有效地防止其升温和爆炸的封闭电池,从而可以确保其安全性和可靠性, 在这种完全封闭的电池中,内部压力由于短路,过充电,反向充电等而升高。 中心偏心于金属基板1的中心的阀元件5的形成产生了围绕阀元件5的圆周具有大的宽度部分的狭缝3.当电池的内部压力升高时,阀元件 5从弯曲支点部4与金属箔2一起平滑地升起,从而切断引线6,或者使钎焊部8与引线6脱离,从而可靠地断开电流。 然后,允许金属箔以规定的压力稳定且准确地爆裂,从而形成阀开口部7,使得电池的内部气体能够排出。 因此,可以预先防止电池爆炸。