Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
An enclosed non-aqueous secondary cell in which a group of electrodes comprising positive and negative electrodes allowing absorption and release of a light metal and separators are accommodated in a closed-end cell-armoring can together with a non-aqueous electrolyte and an opening of the armoring can is closed by an insulating gasket positioned around the inner periphery of the opening of the can and a closing lid fitted in and supported by the gasket and simultaneously serving as a positive or negative terminal, wherein: the closing lid comprises an explosion-proof valve capable of deforming towards the direction opposite to the group of electrodes in response to an increase in the internal pressure of the cell, a terminal cap provided with vent holes and arranged at the side of the explosion-proof valve opposed to the group of electrodes and a non-reverse type switch which is positioned between the explosion-proof valve and the terminal cap and serves to shut-off the electrical connection between the terminal cap and the positive or negative electrode when the temperature of the cell is raised or the internal pressure of the cell is increased.
Claim 2
Dependent Claim
186 words
An enclosed non-aqueous secondary cell in which a group of electrodes comprising positive and negative electrodes allowing absorption and release of a light metal and separators are accommodated in a closed-end cell-armoring can together with a non-aqueous electrolyte and an opening of the armoring can is closed by an insulating gasket positioned around the inner periphery of the opening of the can and a closing lid fitted in and supported by the gasket and simultaneously serving as a positive or negative terminal, wherein: the closing lid comprises an explosion-proof valve capable of deforming towards the direction opposite to the group of electrodes in response to an increase in the internal pressure of the cell, a terminal cap provided with vent holes and arranged at the side of the explosion-proof valve opposed to the group of electrodes and a non-reverse type switch which is positioned between the explosion-proof valve and the terminal cap and serves to shut-off the electrical connection between the terminal cap and the positive or negative electrode when the temperature of the cell is raised or the internal pressure of the cell is increased.
Claim 3
Dependent Claim
21 words
The enclosed non-aqueous secondary cell of claim 1 wherein the switch comprises a conductor consisting essentially of a shape memory alloy.
Claim 4
Dependent Claim
35 words
The enclosed non-aqueous secondary cell of claims 1 or 2 wherein the non-reverse type switch is one having a contact type electrical connection system in which the connected portion is separated in its operating condition.
Claim 5
Dependent Claim
41 words
The enclosed non-aqueous secondary cell of any one of claims 1 to 3 wherein the non-reverse type switch is one having a welded type electrical connection system in which the welded portion is broken or peeled off in its operating condition.
Claim 6
Dependent Claim
38 words
The enclosed non-aqueous secondary cell of any one of claims 1 to 3 wherein the non-reverse type switch is one having a caulking type electrical connection system in which the caulked portion is broken in its operating condition.
Claim 7
Dependent Claim
41 words
The enclosed non-aqueous secondary cell of any one of claims 1 to 3 wherein the non-reverse type switch is one comprising a plate-like, rod-like or linear electrically connected portion in which the electrically connected portion is cut by a cutting means.
Claim 8
Dependent Claim
34 words
The enclosed non-aqueous secondary cell of any one of claims 1 to 3 wherein the non-reverse type switch is a pressure-contact type one which makes use of a plate spring or a spiral spring.
Claim 9
Dependent Claim
39 words
The enclosed non-aqueous secondary cell of any one of claims 1 to 4 wherein the non-reverse type switch is a welded type one in which a part of a plate spring is connected to the explosion-proof valve through welding.
Claim 10
Dependent Claim
37 words
The non-aqueous secondary cell of any one of the preceding claims wherein the positive electrode active material is used in combination with sodium and/or potassium and/or rubidium and/or magnesium and/or calcium and/or barium salts of carbonic acid.
Claim 11
Dependent Claim
101 words
The non-aqueous secondary cell of claim 9 wherein the positive electrode active material is used in combination with sodium and/or potassium and/or rubidium salts of carbonic acid in an amount of not less than 0.1% by weight and not more than 5% by weight on the basis of the weight of the active material and/or the positive electrode active material is used in combination with magnesium and/or calcium and/or barium salts of carbonic acid in an amount of not less than 0.5% by weight and not more than 25% by weight on the basis of the weight of the active material.