Abstract: A lead storage battery including a cell, a cell chamber, and a gas exhaust unit. The gas exhaust unit includes a small chamber provided in a battery lid and including a first exhaust path having an opening at the cell chamber side, a covering body mounted on a bottom wall of the small chamber to cover the opening of the first exhaust path, a drop-off prevention member provided in an upper part of the small chamber and including a second exhaust path, a gap formed in at least a part between the bottom wall of a periphery of the opening and the covering body, and space for allowing movement of the covering body between the covering body and the drop-off prevention member in the small chamber. The gas is exhausted to an outside via the first exhaust path, the gap and the second exhaust path.

Abstract: A battery includes a cell casing that has recessed portion on a major surface of the casing, the recessed portion being substantially planar and bordering a remainder of the major surface at a ridge portion on each of one or two sides of the recessed portion, whereby the recessed portion, the ridge portions, and the remainder of the major surface cooperate under an increase of gauge pressure to cause a plane defined by a boundary between the ridge portions and the remainder of the major surface to move.

Abstract: A sealed rectangular battery excellent in volumetric efficiency and pressure resistance is provided. The sealed rectangular battery includes an electrode group having a positive electrode and a negative electrode and a cell casing for accommodating therein the electrode group and an electrolyte solution, which casing includes a rectangular frame member, a first lid member and a second lid member. Each of the first and second lid members includes a body portion for covering one of the openings of the frame member, and a side portion formed so as to protrude from the body portion substantially along at least one set of sides opposite to each other.

Abstract: A battery pack comprises a battery stack. The battery stack includes a plurality of battery modules that are arranged in parallel in side-by-side relationship; a plurality of couplers each being mounted on a given portion of the corresponding battery module thereby to constitute a coupler-mounted battery module. The couplers are detachably connected to one another to constitute an aligned unit of the couplers. Each of the couplers comprises a plurality of projected pawls provided by one side of the coupler and a plurality of catching recesses provided by the other side of the coupler. The catching recesses catch the projected pawls of an adjacent coupler for forming part of the aligned unit of the couplers.

Abstract: A cylindrical electrode group prepared by winding a positive electrode and a negative electrode with a separator interposed therebetween is placed in a rectangular battery case together with an electrolyte. A pressure release mechanism is provided on a bottom surface of the battery case parallel to a winding axis of the electrode group. The pressure release mechanism is spaced apart from a projection line of the winding axis of the electrode group projected at a right angle on the bottom surface of the battery case.

Abstract: A fuel cell system is described that enables discharge of moisture generated by the fuel cell system based on pressure differences between components of the fuel cell system. The fuel cell system includes a fuel cell that discharges oxidant offgas via a cathode discharge pipe and discharges fuel offgas and moisture to an anode drain opening that in turn discharges the fuel offgas and the moisture to a gas-liquid separator via an anode drainpipe. A throttle valve establishes a pressure difference downstream within the anode drainpipe to enable movement of the fuel offgas and the moisture from the anode drain opening to a lower pressure area of the gas-liquid separator. In addition, the pressure difference enables the fuel offgas to flow from the gas-liquid separator to the cathode discharge pipe through the throttle valve.

Abstract: An inexpensive battery pack including a battery module wherein a safety valve is provided for each cell in which battery pack gas leakage can be prevented. A battery pack 100 has a plurality of battery modules 110 each including a plurality of cells 120 respectively provided with a safety valve 123. The plurality of cells 120 included in each battery module 110 are arranged such that safety-valve mounting walls 121a are oriented in the same direction. Each battery module 110 comprises a gas duct member 130 covering all the safety valves 123 of the cells 120 included therein and forming a gas discharge path 131 between the gas duct member 130 and the safety-valve mounting walls 121a, and a sealing member 160 for hermetically sealing the gaps between each cell case 121 and the gas duct member 130.

Abstract: A method and apparatus is provided in which a pre-formed sleeve or pre-formed secondary can comprised of one or more layers of a high yield strength material is positioned around the pre-formed battery case, the pre-formed sleeve/secondary can inhibiting the flow of hot, pressurized gas from within the battery through perforations formed in the battery casing during a thermal runaway event.

Abstract: A battery module includes at least one electrochemical cell. The electrochemical cell includes a first terminal conductively coupled to a first electrode and a body portion configured to function as a second terminal and conductively coupled to a second electrode via a pressure relief portion. The battery module further includes an end cap comprising a conductive portion and an insulating portion, the conductive portion being conductively coupled to the body portion. The pressure relief portion is configured to separate from the body portion to a deployed position when a pressure within the body portion reaches a first predetermined level, thereby substantially breaking the conductive coupling between the body portion and the second electrode. The insulating portion substantially prevents formation of a conductive coupling between the body portion and the second electrode when the pressure relief portion is in the deployed position.

Abstract: A rechargeable battery, particularly a lead storage battery, having filling openings that are disposed in the battery cover and lead to the battery cells, closing plugs being provided in said filling openings in a sealing manner, wherein, between the inner wall of the filling opening and the outer wall of the stopper, at least one sealing lip is present, which can be deformed by overpressure in the battery cell, in order to relieve the overpressure.

Abstract: A cap assembly with desirable safety performance for use in lithium ion batteries, includes an insulating gasket defining a through hole therein, a rupture plate positioned in the through hole, a vent plate defining an air hole electrically connected with the rupture plate, a current interrupt device disposed on the rupture plate, and an end cap defining an air exhaust hole assembled on the current interrupt device. The current interrupt device has an upper conductive plate electrically connected with the end cap, a lower conductive plate electrically connected with the rupture plate, and a fuse electrically connecting the upper conductive plate and the lower conductive plate. When the current intensity in the lithium ion battery exceeds a predetermined value, the fuse melts to cut off the current path.

Abstract: A method of recycling a lithium-containing energy storage device including an electrolyte is provided. The method includes placing the storage device in an extraction vessel, sealing the extraction vessel, adding a fluid containing CO2 as a primary component to the extraction vessel under such conditions that the CO2 is in a supercritical phase, dissolving the electrolyte in the fluid, transferring the fluid to a recovery vessel and recovering the electrolyte from the fluid in the recovery vessel. Methods of refurbishing lithium-containing energy storage and conversion devices are also disclosed.

Abstract: A top sealing plate used for a battery includes a filter, a cap, and a valve body. The filter has a valve hole and upper opening; the cap has a convex portion and a flange portion disposed around the convex portion; the opening end of the upper opening of the filter has a bend portion; and the outer periphery end of the flange portion of the cap and the bend portion are caulked and joined to each other. The caulked portion includes both states of contact, that is, a strong contact portion and a weak contact portion, between the surface of the outer periphery end of the flange portion and the bend portion. By this configuration, the electric contact resistance between the cap and the filter will be greatly reduced. In addition, the contact resistance is stabilized at a low level. Further, the internal resistance of the battery is lowered, thereby improving the battery performance.

Abstract: A secondary battery includes an electrode assembly, a can receiving the electrode assembly, and a cap assembly coupled to the open upper part of the can. In addition, a vent including an opening, which is thinner than the can is formed on a wide side of the can, and a shock absorbing portion, which is thinner than the can and thicker than the opening, is formed near the vent. Accordingly, the vent can be protected from damage from external shocks, which are absorbed by the shock absorbing portion.

Abstract: Enhanced safety is provided in the event of an information handling system catastrophic battery failure by extending a flame container outward from the battery to vent flammable gases through holes having a quenching distance that retards transfer of flames from the battery. For example, telescoping cylinder sections disposed proximate the casing of a battery cell are forced outward as a telescoping assembly when pressure within the casing exceeds a predetermined safety threshold. The flame container vents flammable gases away from other cells of the battery and may direct the vented gases to the exterior of an information handling system housing or to the interior of the housing.

Abstract: An electrochemical cell with a collector assembly for sealing the open end of a cell container. The collector assembly includes a retainer and a contact spring with a peripheral flange, each having a central opening therein. A pressure release vent member disposed between the retainer and the peripheral flange of the contact spring seals the openings in the retainer and contact spring under normal conditions and ruptures to release pressure from within the cell when the internal pressure exceeds a predetermined limit.

Abstract: A case structure generally includes a trough shaped base section, a positive end piece, a negative end piece, and a cover section. The trough shaped base section includes a bottom and two side wall members. The positive and negative end piece are disposed at opposite ends of the base section and include an electrically conductive material at least partially embedded within a thermoplastic material. The cover section is disposed on the base section for sealing the prismatic case. The base section and the cover section can be made from, for example, a polymeric material.

Abstract: A battery module includes a first enclosure, a second enclosure, and a plurality of batteries having vent holes accommodated between the first and second enclosures, and has a configuration in which a first partition member for accommodating the batteries individually at a position facing the battery vent holes in at least one of the first enclosure and the second enclosure is provided.

Abstract: A secondary battery including a case having a lengthwise direction and including a space therein, an electrode assembly disposed in the space in the case, the electrode assembly including a rolled laminate of a positive electrode plate, a negative electrode plate and a separator interposed therebetween and having non-coating portions at ends thereof, a pair of current collectors, each current collector being electrically connected to one of the non-coating portions of the electrode assembly, each current collector including a current collector plate having an end portion, each end portion extending along the lengthwise direction of the case such that the end portions of the current collector plates of the pair of current collectors are spaced apart from each other in a central region in the lengthwise direction of the case, and a cap plate coupled to a top of the case to seal the case, the cap plate having a vent disposed therein at a position corresponding to the end portions of the current collector plates.

Abstract: Disclosed is a sealed structure for an electrochemical device having a hollow space therein, further comprising a material generating gases via thermal decomposition in the hollow space. Also, disclosed is an electrochemical device comprising a cathode, an anode, a separator, an electrolyte, a casing for the device, and the structure for the electrochemical device.

Abstract: An object of the present invention is to provide a sealed cell having a sealing body with a space-saving safety valve that has excellent safety. The sealed cell is sealed by caulking the sealing body around an opening of a bottomed cylindrical outer can. The sealing body includes a terminal cap and a safety valve. The terminal cap includes an external terminal projecting toward an outside of the sealed cell, a flange portion in a periphery of the external terminal, and one or more gas releasing holes for releasing a gas from inside to outside of the cell. The gas releasing holes is provided in the external terminal. And the safety valve includes a conductive contact portion projecting toward an inside of the sealed cell, a peripheral portion in a periphery of the conductive contact portion, and one or more break grooves formed radially in the peripheral portion, Moreover, at least one of the gas releasing holes overlap with at least one of break grooves in planar view of the sealed cell.

Abstract: The invention relates to a device for degassing the battery (1) of an automobile, that comprises a degassing pipe (4) having a first end which is provided in the upper portion of the battery outside the latter and is connected to the inside of the battery, while the second end is provided in the vicinity of the lower portion of the battery outside the latter and is connected to an opening giving into a discharge space. According to the invention, said second end is connected to said discharge space through a check valve that only allows the flow from said first end to the discharge space.

Abstract: Disclosed herein is a plate-shaped secondary battery constructed in a structure in which an electrode assembly of a cathode/separator/anode structure is mounted in a battery case, and the battery case is sealed by thermal welding, wherein the secondary battery has at least one valve (one-way exhaust valve), having a small thickness, mounted at a sealed portion, formed at the outer circumference of an electrode assembly receiving part of the battery case, for allowing internal high-pressure gas to be exhausted out of a battery cell and preventing external gas from being introduced into the battery cell. The secondary battery according to the present invention has the effect of effectively exhausting internal high-pressure gas generated during the abnormal operation of the battery, such as overcharge, out of the battery case, while maintaining the sealability of the battery case, thereby simultaneously improving the efficiency and safety of the battery.

Abstract: Provided is a battery capable of providing both fixing durability of a protective film during normal use and peeling easiness of the protective film during operation of a safety valve. A lithium ion secondary battery (100) includes a protective film (140) fixed to a battery case (110) while covering a safety valve part (125) including a breakable portion (126). This protective film (140) has a first fixed portion (145) located around a valve-corresponding unfixed portion (144) and fixed to the battery case (110) and a second fixed portion (147) located more outside than the first fixed portion and fixed to the battery case (110) through an intermediate unfixed portion (146). They are configured such that the first fixed portion (145) first peels off when the safety valve part (125) operates, prompting peeling of the second fixed portion (147), thus releasing gas to the outside.

Abstract: An end assembly seals a cylindrical electrochemical cell. The assembly includes a positive temperature coefficient (PTC) device and a gasket having a protrusion that cooperates with the end assembly isolates the PTC device from primary axial compression forces present in the closure assembly. In further embodiments of the present invention, the end assembly may be produced by insert molding a seal element about the terminal cover and the gasket itself has an E or F shaped cross section.

Abstract: A non-aqueous electrolyte secondary battery has a current interrupting mechanism with excellent impact and vibration resistance. The mechanism includes a fragile portion which breaks when the diaphragm deforms and rises upward, thereby interrupting current flow thereto; and an insulating current collecting tab holder into which a part of a current collecting tab is inserted. The tab holder has a tab receiving portion into which the insert member of the tab is inserted. The tab receiving portion is provided on the inner and outer surfaces thereof with a holder hole, which overlaps with a throughhole when the insert member is inserted. The diaphragm is disposed outside the tab receiving portion so as to cover the holder hole and electrically connected at its center bottom to the fragile portion via the holder hole. The gas pressure in the battery acts on the fragile portion and the inner side of the diaphragm.

Abstract: A cylindrical secondary battery where safety can be secured even when an external pressure accompanying rapid deformation of the battery acts on the battery is provided in a battery having a large capacity. A lithium ion secondary battery has a capacity of 14 Ah, where an upper lid is fixed to a battery can which receives an electrode winding grope therein. The upper lid includes a diaphragm 2 formed with a rupturing valve and an upper lid cap whose peripheral edge portion is fixed to a peripheral edge portion of the diaphragm 2. The rupturing valve includes a rupturing groove 8 with a V-shaped section formed on a surface of the diaphragm 2 positioned on the side of the upper lid cap and a rupturing groove 18 with a U-shaped section formed on a surface of the diaphragm 2 positioned on the side of the electrode winding group so as to correspond to the position of the rupturing groove 8.

Abstract: A secondary battery with a maximized cycle-life having a multi-stage safety valve so as to lower the inner pressure of the battery in stages. The multi-stage safety valve is installed on a case and the secondary battery is equipped with an electrode assembly including both positive and negative electrodes and a separator interposed therebetween.

Abstract: A battery charger (10) comprising a housing (15) enclosing battery charging electronics (11), an interface (12) connectable to a mains outlet, and a charging current output interface. An aperture (71) is formed in a wall (75) of the housing, and a pressure relief valve (90) is arranged in said aperture, functioning to open and evacuate gas from the interior of the housing to the exterior of the housing when the pressure in the housing exceeds a pressure limit relative the exterior of the housing. In one embodiment, a bushing (90) for a cable (80) interconnecting the battery charging electronics (11) and the charging current output interface acts as the valve.

Abstract: An air battery system has a sealed air battery cell (10) having: an air electrode having an air electrode layer (4) containing a conductive material and an air electrode power collector (6) for collecting electric power from the air electrode layer; a negative electrode having a negative electrode layer (3) containing an negative electrode active material that adsorbs and releases metal ions and a negative electrode power collector (2) for collecting electric power from the negative electrode layer; a separator (7) provided between the air electrode layer and the negative electrode layer; and a sealed air battery case (1a, 1b). The air battery system also has a depressurization portion (20) that reduces the internal pressure of the sealed air battery cell to below the atmospheric pressure.

Abstract: The invention is a battery containing at least one electrochemical cell having a sealing plate with a pressure relief vent, the sealing plate being part of an electrical circuit between one of the electrodes and the corresponding terminal under normal conditions but capable of changing shape to break the circuit without the cell venting when the temperature of the sealing plate rises to a predetermined level and then returning to its original shape to reestablish the broken circuit when the sealing plate temperature returns to a normal level.

Abstract: A nickel-metal hydride storage battery is provided capable of suppressing changes in discharge reserve and charge reserve of a negative electrode to prevent lowering of battery characteristics for a long term. A nickel-metal hydride storage battery 100 of the present invention comprises a battery main part (an electrode plate group 150, an electrolyte, and others), a case 102 housing this battery main part, and a safety valve device 101. The safety valve device 101 includes a valve member 110 of a closed-end substantially cylindrical shape. This nickel-metal hydride storage battery 100 is arranged such that a hydrogen leak rate V1(?l/h/Ah) of the battery having been charged and discharged and then charged to 60% SOC satisfies a relationship: 2?V1?4, the hydrogen leak rate being per unit of battery capacity under an atmosphere at a battery temperature of 45° C., and a reduced pressure of 10 kPa.

Abstract: A lithium secondary battery having a cap assembly including a cap plate, an insulation plate and a terminal plate. The insulation plate and the terminal plate each have a predetermined vent hole corresponding to a safety vent formed on the cap plate so that if the secondary battery is dropped, an electrolyte passes through the vent-holes and undergoes a pressure reduction, thereby preventing fracture of a safety vent by the electrolyte while allowing gas to be exhausted upon battery overcharge, full discharge or by overheating.

Abstract: The battery system is provided with battery blocks 2 that connect a plurality of battery cells 1 having gas exhaust valves 11; and with hollow exhaust ducts 20 that connect to the gas exhaust valve 11 gas exhaust opening 12 of each battery cell 1 that makes up the battery blocks 2, and that exhaust gas discharged from the gas exhaust openings 12 to the outside. The exhaust ducts 20 are made of plastic with embedded metal lines 21 that extend in the lengthwise direction.

Abstract: In an alkaline dry battery using a polyamide resin sealing gasket that is placed between a battery case and an anode terminal plate without using a stiffening member and seals the battery case in an airtight manner, the sealing gasket includes a first and a second thin wall parts and is formed of polyamide resin, polyhexamethylene dodecanamide.

Abstract: The invention is based on a device having at least one electrochemical cell (20, 30). It is proposed that a volume (12) for receiving the at least one cell (20, 30), which volume is capable of being subjected to pressure by a pressure medium, is provided for subjecting the at least one cell (20, 30) to external pressure.

Abstract: A battery enveloping assembly and a battery incorporating such an enveloping assembly are disclosed. The enveloping assembly comprises an explosion-proof assembly and a casing with a cavity. A protruding annular sealing connection portion is provided in the middle of the external surface of the casing. An inner wall of the casing is provided with an annular sealing groove. The explosion-proof assembly is secured in the casing in an insulating and sealing manner through the annular sealing groove. A first through hole through which an electrode is connected to the explosion-proof assembly is provided in a center of a bottom of the casing. A second through hole through which an electrode extends out from the explosion-proof assembly is provided in a top of the casing.

Abstract: A fluid consuming battery (10) is provided with a fluid regulating system (50) for regulating fluid entry into the battery. The battery (10) includes a fluid consuming cell (20) having a cell housing with fluid entry ports for the passage of a fluid into the cell housing. A first fluid consuming electrode and a second electrode are disposed within the cell housing. The fluid regulating system (50) includes a valve having a moving plate (66) disposed adjacent to a fixed plate (62). The moving plate and fixed plate both have fluid entry ports (68, 64) that align in an open valve position and are misaligned in a closed valve position. The fluid regulating system (50) also includes an actuator that may include one or more shape memory alloy (SMA) components (82a, 82b) for moving the moving plate (66) relative to the fixed plate (62) to open and close the valve.

Abstract: A method and apparatus is provided in which a layer of an intumescent material surrounds the casing of a battery, the layer helping to prevent the formation of perforations in the battery casing during a thermal runaway event and, if a perforation is formed, inhibiting the flow of hot, pressurized gas from within the battery. A sleeve, surrounding the cell, may be used to contain the intumescent material during the thermal event.

Abstract: A fluid consuming battery (10) is provided with a fluid regulating system (50) for regulating fluid entry into the battery. The battery (10) includes a fluid consuming cell (20) having a cell housing with fluid entry ports for the passage of a fluid into the cell housing. A first fluid consuming electrode and a second electrode are disposed within the cell housing. The fluid regulating system (50) includes a valve having a moving plate (66) disposed adjacent to a fixed plate (62). The moving plate and fixed plate both have fluid entry ports (68, 64) that align in an open valve position and are misaligned in a closed valve position. The fluid regulating system (50) also includes an actuator that may include one or more shape memory alloy (SMA) components (82a, 82b) for moving the moving plate (66) relative to the fixed plate (62) to open and close the valve.

Abstract: A fluid consuming battery (10) is provided with a fluid regulating system (50) for regulating fluid entry into the battery. The battery (10) includes a fluid consuming cell (20) having a cell housing with fluid entry ports for the passage of a fluid into the cell housing. A first fluid consuming electrode and a second electrode are disposed within the cell housing. The fluid regulating system (50) includes a valve having a moving plate (66) disposed adjacent to a fixed plate (62). The moving plate and fixed plate both have fluid entry ports (68, 64) that align in an open valve position and are misaligned in a closed valve position. The fluid regulating system (50) also includes an actuator that may include one or more shape memory alloy (SMA) components (82a, 82b) for moving the moving plate (66) relative to the fixed plate (62) to open and close the valve.

Abstract: An integrated cap assembly of a secondary battery. A cap lamination forms a top portion of the secondary battery and serves as a connection terminal while the secondary battery is charged or discharged. A gasket is molded integrally with the cap lamination in such a manner that a peripheral portion of the cap lamination is inserted in the gasket, the gasket insulating the cap lamination from a can of the secondary battery and sealing a gap between the cap lamination and the can.

Abstract: A rechargeable battery including an electrode assembly containing a positive electrode, a negative electrode and a separator interposed therebetween, a case having a space for housing the electrode assembly therein, lead elements connected to the electrode assembly and disposed at a sealing region of the case, and a sealant arranged between and adjacent to the case and the lead element the sealant including an area having relatively less resistance to fracture.

Abstract: A battery includes a battery can housing an cell that supplies electrical energy at terminals of the cell by an electro-chemical reaction with oxygen, the can including, a first member having at least one hole that is exposed to air; and a second member. The battery also includes a mechanism coupled to one of the first and second members to move the one of the first and second members such that when current is drawn from the battery, the opening in the member allows air to pass into the battery, and to move the one of the first and second members such that when current is not drawn from the battery, the opening in the member is not in registration to inhibit air to pass into the battery. The battery also includes a circuit to control the mechanism. In one embodiment the circuit monitors levels of O2 in a air plenum that surrounds the cell.

Abstract: It is aimed to provide a battery pack capable of securing safety by preventing A battery contained in the battery pack from entering a burning state even if the battery releases high-temperature gas in an abnormal state. An exhaust duct 1C for permitting the flow of gas released from the battery is provided and the gas is exhausted to the outside after reducing the temperature thereof in the exhaust duct 1C. A flow passage area of the exhaust duct 1C is in the range of not less than 0.5 mm2 and not more than 15 mm2 per 1 Ah of the battery capacity. The exhaust duct 1C is provided with a gas cooling portion 1L and a spark trapping portion 1M.

Abstract: An electrochemical cell with a vent assembly that reliably prevents resealing of a vented seal member is provided. The vent assembly seals the end of a container that includes a first electrode, a second electrode, a separator located between the first and second electrodes and an electrolyte in contact with the electrodes and separator. The seal member includes a diaphragm with a hinge along one edge and a vent along another edge. The hinge and vent are located so that, relative to the longitudinal axis of the vent assembly, the hinge is closer to the vent than to the cell's terminal cover.

Abstract: A battery having an outer casing and an anode/cathode assembly within that casing, wherein the anode/cathode assembly includes plural anodes and cathodes and electrolyte therebetween. The battery has a pressure relief feature associated with the casing and a channel preservation element sufficiently rigid to preserve at least one gas passageway to the pressure relief feature under conditions of anode/cathode assembly warpage. Thus the gas in the passageway will not become impeded by anode/cathode assembly warpage.

Abstract: A safety valve for battery has a valve body (1) and a valve core (2). The valve body (1) is fixed on a cover plate (4) of a battery and covers a discharging hole (9) in the cover plate (4) of the battery. The valve body (1) is formed with an exhaust opening (3) which is communicated with an internal space of the valve body (1). The valve core (2) is elastically held between a top cover (11) of the valve body (1) and the cover plate (4) of the battery. A plurality of columns (6) are arranged at intervals along a circumference of a gap between a side wall of the valve core (2) and an inner wall of the valve body (1). A cavity defined by every two adjacent columns (6), the side wall of the valve core (2) and the inner wall of the valve body (1) forms as a side exhaust slot (7) which is communicated with the exhaust opening (3) in the valve body (1).

Abstract: A gas exhaust structure of a battery includes a rupture valve formed in a battery body, and a pipe unit composed by integrating a coupling pipe and an exhaust pipe with each other. A one-side opening of the coupling pipe is coupled to the rupture valve. The exhaust pipe is coupled to an other-side opening of the coupling pipe, guides gas that spouts out from an inside of the battery body through the rupture valve and the one-side opening of the coupling pipe, and exhausts the gas to an outside. The exhaust pipe is arranged to be offset with respect to the rupture valve without allowing an extended line that passes through a center of the rupture valve and a centerline of the exhaust pipe to be perpendicular to each other.

Abstract: An electrochemical cell with a collector assembly for sealing the open end of a cell container. The collector assembly includes a retainer and a contact spring with a peripheral flange, each having a central opening therein. A pressure release vent member disposed between the retainer and the peripheral flange of the contact spring seals the openings in the retainer and contact spring under normal conditions and ruptures to release pressure from within the cell when the internal pressure exceeds a predetermined limit.