Abstract: An interruption structure includes an operating member disposed outside a casing, a first end of the operating member being disposed above a power generating unit and displaceable toward the outside as an internal pressure rises, a fixing member positioned opposing the operating member across the power generating unit, a holding member disposed over a sealed part of the casing and fixed to the fixing member, and an element having an electrically conductive path, held by the holding member, the element being electrically connected to at least one of the lead terminals at one end of the element and to an external electrode at the other end of the element.

Abstract: The invention provides a high-performance pressure sensitive current breaker for a cell that securely cuts off the current path inside the cell even when the pressure increase inside the cell is low, and suppresses the pressure increase inside. The pressure sensitive current breaker for a cell of this invention is configured such that an insulator to swell out toward a diaphragm portion is formed by the insert molding with part of a lead part exposed from an opening of a retaining member, a notching part is formed on part of the lead part to make the lead part easily ruptured, a current path between a generating element inside the cell and an external electrode is made through the lead part, and when a pressure inside the cell case rises over a specific value to displace the diaphragm upward, the diaphragm presses the insulator upward to rupture the lead part at the notching part, thereby cutting off the current path.

Abstract: In a pressure-sensitive breaker for a battery, a recess is formed at a position on the inner surface of a battery pack opposing a side face of a battery case of a battery. A first terminal is provided to be connected to an external electrode of the battery pack, and a second terminal is provided to be connected to the battery case serving as one electrode of the battery. An electric path is formed of a conductive portion on the surface of an element, and both ends of the conductive portion are connected to the first and second terminals. Due to bending of the side face of the battery case toward the recess caused when the internal pressure in the battery rises above a predetermined value, the element is deformed toward the recess and broken, and the electric path is cut off.

Abstract: In a current cutoff mechanism for a cell, when the internal pressure of a cell case exceeds a predetermined value, a diaphragm section is displaced upward, and a terminal is broken from portions of a V-shaped groove section in contact with two slits, thereby cutting off the current path formed between a cell lid and a power generating element inside the cell.

Abstract: A cell electrical path breaking mechanism in which an electrical path is formed between a cell case and an external cathode through a diaphragm and a connection member. When the internal pressure in the cell case increases to a value equal to or greater than a predetermined value, causing the diaphragm to be displaced upward, the connection member is severed, so that the electrical path is broken. Even when flammable gas or the like is generated in the cell due to an abnormality in the cell, the cell electrical path breaking mechanism makes the cell safe to use by preventing an arc produced when the connection member is severed as a result of the displacement of the diaphragm from igniting the flammable gas.

Abstract: A protection device for preventing swelling or breakage of a battery cell in response to over-charging and/or an over-current condition. The protection device is connected between an internal electrode and an external electrode within the battery cell and includes an electrically insulating casing and an electrically insulating and flexing lid member for sealing an inner portion of the casing. A breakable electrically conductive member is positioned within the sealed inner portion that electrically connects wiring members. The lid member includes a projection which abuts against a central portion of the electrical conductive member. In an over-charge or over-current condition, increased pressure within the battery cell causes the projection of the lid member to press against the electrically conductive member, thereby causing the electrically conductive member to break such that the electrical connection between wiring members is broken.

Abstract: In a current cutoff mechanism of a cell according to the present invention, a convex portion of the diaphragm is press-fitted into a fitted part, a conductive path is formed between a cell lid and a generating element inside the cell via the diaphragm and an internal electrode and when internal pressure in a cell case exceeds a predetermined value and the diaphragm is displaced, the convex portion of the diaphragm is pulled out from the fitted part and the conductive path is cut off.

Abstract: An interruption structure includes an operating member disposed outside a casing, a first end of the operating member being disposed above a power generating unit and displaceable toward the outside as an internal pressure rises, a fixing member positioned opposing the operating member across the power generating unit, a holding member disposed over a sealed part of the casing and fixed to the fixing member, and an element having an electrically conductive path, held by the holding member, the element being electrically connected to at least one of the lead terminals at one end of the element and to an external electrode at the other end of the element.

Abstract: The pressure sensitive circuit breaker comprises a diaphragm portion formed by grinding a part of a lid so as to have a wall thickness which is small in comparison with other portions of the lid, the diaphragm portion being displaced by an internal pressure of a battery, a cut-off element having a cut-off circuit and held by the lid, the cut-off element functioning to cut off the cut-off circuit by displacement of the diaphragm portion with an increase in internal pressure of the battery, an external electrode connected to one end of the cut-off circuit, and inner connection means for connecting an opposite end of the cut-off circuit of the cut-off element with a power generating element located in the interior of the battery.

Abstract: The pressure sensitive circuit breaker comprises a metallic battery lid having a hole, an insulator formed with a cylindrical portion having a bore which cylindrical portion is inserted into the hole, a metallic rivet inserted through the cylindrical portion of the insulator, an insulating holder having a through hole for insertion therein of the rivet, and an electrically conductive connecting portion formed around an outer surface of the through hole of the holder and having an exposed surface with a space present on the back side thereof, the rivet having a tongue portion on the side opposite to a caulking portion thereof, with a terminal portion being bonded to the tongue portion by welding.

Abstract: A current path cut-off component of a cell is to be provided which is smaller in the number of parts used than in conventional like components and which is superior in assembling performance. In the current path cut-off component of a cell according to the present invention, a current path is formed between a cell lid and a power generating element (not shown) disposed in the interior of the cell, through a diaphragm portion and a lead, the diaphragm portion displaces itself upon an increase in internal pressure of a cell case above a predetermined value, and this displacement of the diaphragm portion causes the diaphragm portion and the lead to be separated from each other to cut off the current path.

Abstract: In the current path cut-off mechanism in a cell according to the present invention, a current path is formed between a cell lid and a power generating element through a diaphragm portion D and an internal terminal, and a base portion of the internal terminal is embedded in an insulating member by insert molding so that a bonding portion of the internal terminal becomes flush with the diaphragm portion D-side surface of the insulating member. Therefore, it is possible to eliminate variations in the position of the bonding portion of the internal terminal and hence possible to eliminate variations in the bonding strength between the internal terminal and the diaphragm portion.

Abstract: A protection device for preventing swelling or breakage of a battery cell in response to over-charging and/or an over-current condition. The protection device is connected between an internal electrode and an external electrode within the battery cell and includes an electrically conducting casing and an electrically conducting and flexing lid member which are connected through a holding member so as to seal an inner portion of the casing. A breakable electrically conductive member is positioned within the sealed inner portion which electrically connects the casing and the lid member. The lid member includes a projection which abuts against a central portion of the electrical conductive member.

Abstract: A pressure actuated breaker for cutting-off current flow in and from a battery in response to a relatively low internal pressure rise within the battery. The pressure cut-off sensor includes a box having an opening and being formed of an insulating material, a bendable packing for covering the opening and which is deformed into the box by external pressure, an actuator having a higher elasticity than the packing and being pressed by the deformation of the packing, and a breakable element supported in the box, the breakable member including a substrate and a conductive path formed on the substrate. When pressure within the battery exceeds a predetermined amount, the packing is pressed inward into the box, thereby pressing the actuator against the breakable member such that the substrate is cracked, thereby breaking the conductive path.

Abstract: Disclosed is a safety device of a secondary cell, which comprises a lid having an opening section and directly or indirectly fixed for closing a cell case; a pressure receiving means covering the opening section and having flexibility to displace with an internal pressure of the cell; an element having a conductive path connected at one end to an internal electrode of the cell and at the other end to an external electrode, for breaking the conductive path with displacement of the pressure receiving means resulting from a change in the internal pressure of the cell; and locking pawls which fasten the pressure receiving means to the lid by staking to close the cell interior, to thereby keep the cell interior closed when the internal pressure is at a specific value or less and to release a gas from inside through a gap produced between the pressure receiving means and the lid by unfastening staked sections when the internal pressure has exceeded the specific value.

Abstract: A variable resistor provided with a click mechanism comprising a metallic bearing, a slide member, a holder to which the slide member is attached, a leaf spring being placed in a cavity formed in the bearing. A protrusion formed integrally with the leaf spring being resiliently contacted with plurality of grooves for click which are formed in a bottom of the bearing.