KR970031012A - Lithium Battery with Safety Plate - Google Patents

Abstract

The purpose of the present invention is to provide a lithium battery having a safety plate capable of reducing the power output of sparks ejected outside the vent hole of the cap when the electrolyte expands due to heat and impact and expands when the internal gas is expanded. have.

The present invention is a conventional lithium battery, when the electrolyte in the case is expanded, the safety plate having two or more fully open openings are formed in order to concentrate the expansion pressure to a point away from the center at a certain distance radially outward It is characterized in that it is installed on the lower surface of the rupture disk of the cover. In addition, the opening of the safety plate may be formed by a cutting flange that is not cut out in the radial direction so that the explosion pressure is directed to the outside of the radial direction, the cutting flange is formed on both sides so that the explosion pressure spreads widely when passing through the opening It is also possible.

Accordingly, since the bursting disk is easily ruptured by concentrating internal pressure, the explosion disk is prevented and the flame rises, thereby increasing the safety of the lithium battery.

Description

Lithium Battery with Safety Plate

Since this is an open matter, no full text was included.

1 is an exploded perspective view of a conventional lithium battery,

2 is a cross-sectional view of a conventional lithium battery,

3 is a cross-sectional view of an upper end of a conventional lithium battery.

Claims (4)

Rupture disk 33 ruptured by a pressure equal to or greater than a predetermined threshold value, a ring plate 32, which plays a buffer role, is covered on an upper surface of the rupture disk 33, and has a central opening, and the rupture disk 33 And the ring plate 32 to the inside and the cover 30 having a central through hole 31, disposed on the upper surface of the cover 30, the PTC element 20 having a structure of the central through hole 21, It is disposed on the upper surface of the PTC element 20, and serves as a contact point of the anode, the cap 10 having a central vent hole 11, the opening portion 62 is formed at the upper end and protruding portion 63 into the upper side wall portion 63. Is formed and the positive electrode plate and the negative electrode plate are spirally wound through the case 60 and the separator plate in which the electrolyte 70 is filled, and the pole plate group 50 accommodated below the protruding portion 63 in the case 60. Fix the rupture disk 33, the ring plate 32, the cover 30, the PTC element 20 and the cap 10 to hold In the lithium battery having a gasket 40 installed on the inner protrusion of the switch 60 to seal the inside of the case 60, when the electrolyte 70 in the case 60 is expanded in the radial direction from the center In order to concentrate the expansion pressure to a point away from the outside of the safety plate having a safety plate, characterized in that installed on the bottom surface of the rupture disk 33 of the cover 30 is formed with two or more openings Lithium battery. According to claim 1, Lithium battery having a safety plate 100, characterized in that the opening 101 of the safety plate 100 has a completely open structure. 2. The safety plate according to claim 1, wherein the opening 103 of the safety plate 100 is formed by a cutting flange 120 which is not cut out in the radial direction so that the explosion pressure is induced outward in the radial direction. Lithium battery with (100). The safety plate of claim 3, wherein the opening 104 of the safety plate 100 is formed with incision flanges 140 and 160 on both sides such that the explosion pressure spreads widely when passing through the opening 104. Lithium battery with 100). ※ Note: The disclosure is based on the initial application.