Cell safety valve and cell having same

Details Cell safety valve and cell having same Cell safety valve and cell having same

2006-11-28

2006-11-28

Rivell, John (Department: 3753)

Fluid handling

Destructible or deformable element controlled

Destructible element

C137S068270, C429S056000

Reexamination Certificate

active

07140380

ABSTRACT:
A cell according to the present invention comprises a positive electrode, a negative electrode, an electrolyte solution, and an outer casing, wherein the outer casing comprises a valve plate30having a thickness, an annular-shaped break groove4formed on the valve plate, and one or more of break aiding grooves1in the inner area of the break groove, and wherein the break aiding groove comprises such configurations that remaining thickness of the valve plate at the break aiding groove is thicker than remaining thickness of the valve plate at the break groove, and at least one end of the break aiding groove is connected with the break groove. In a cell provided with a valve plate which is a safety valve9comprising the break groove and the break aiding groove, the safety valve operates smoothly and releases a gas inside the cell quickly, and resistance to dropping impact is improved.

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