Abstract: A battery includes a battery element, a housing body, and a valve device. The housing body is constituted by at least one laminate including at least a base material layer, a barrier layer, and a heat-sealable resin layer layered in that order and houses the battery element. The valve device is in communication with the inside of the housing body. A joined edge portion in which the mutually facing heat-sealable resin layers are fused together is formed in a peripheral edge portion of the housing body. The valve device includes a first portion and a second portion. A valve mechanism configured to reduce the internal pressure of the housing body if the internal pressure is increased due to gas generated in the housing body is formed in the first portion. An air passage configured to guide gas generated in the housing body toward the valve mechanism is formed in the second portion. The first portion is located on an outer side of an edge of the joined edge portion.

Abstract: A secondary battery including: a case including an opening; a top cover assembly including a top cover plate covering the opening and an electrode terminal, the top cover plate including an electrode lead-out hole corresponding to the electrode terminal; an electrode assembly received in the case and including a main body and a tab, the tab being bent relative to a thickness direction of the top cover plate to form a bent portion; and a current collecting wiring board disposed between the top cover plate and the main body and including a first connection portion, a second connection portion, and a transition portion, the first connection portion and the second connection portion extending along a width direction of the top cover plate and being provided opposite to each other, the first connection portion being connected with the electrode terminal, and the second connection portion being connected with the bent portion.

Abstract: A battery module has a battery stack that includes a plurality of prismatic batteries and an inter-battery separator disposed between every two of the prismatic batteries adjacent to each other in an X direction along which the plurality of prismatic batteries is stacked. The inter-battery separator includes: a middle member having a plate shape; a first side plate-shaped member disposed on a first side of the middle member in the X direction and made of a material that is superior in thermal insulation to the middle member; and a second side plate-shaped member disposed on a second side of the middle member in the X direction and made of a material that is superior in thermal insulation to the middle member.

Abstract: A cell module includes a plurality of battery cells each having a safety valve at a first end in a height direction, a first current collector plate including a main body having a through hole that at least partly overlaps the safety valve when viewed along the height direction and a lead extending into the through hole from the main body and being electrically connected to a first terminal of each of the battery cells, an exhaust duct disposed over a surface of the first current collector plate remote from the battery cells, and an insulating film being made of an insulating material and covering an area of the first current collector plate facing the exhaust duct. The safety valve opens when an internal pressure of any of the battery cells reaches or exceeds a predetermined level.

Abstract: The present disclosure relates to a secondary battery and a battery pack, and the secondary battery includes: an outer casing, comprising a case and a cap assembly connected to each other, the case is provided with an opening, the cap assembly includes a cap plate and an electrode terminal connected to the cap plate, wherein the cap plate is adapted to cover the opening; an electrode assembly accommodated in the case and including a main body and a tab extending out from the main body, wherein the tab is electrically connected to the electrode terminal; a vent connected to the outer casing; and an insulating member at least partially disposed between the electrode assembly and the vent, wherein a projection of the vent on the main body is at least partially covered by the insulating member.

Abstract: A battery module that includes a stack of battery cells, where each battery cell has a terminal, and the terminal has a first alloy of a metal. The battery module has a bus bar that includes a body having a second alloy of the metal, nickel plating on at least a portion of the body, and an indentation disposed on the body, where a thickness of the nickel plating is between 0.2% and 20% of an overall thickness of the body, and a weld physically and electrically coupling the respective terminal to the bus bar. The indentation has a depth between 10% and 90% of the overall thickness, an area of the indentation is between 5% and 20% of an overall area of the body, and the nickel plating enables the weld to be stronger than a weld between the first and second alloys.

Abstract: A seal plate (2) seals an opening part of a capacitor case (an exterior case 52) and includes a main body part (4) including a through-hole (8) for discharging a gas (G) in the capacitor case, a pressure valve (12) arranged to cover the through-hole and including a valve body part (26) allowing passage of the gas, a storage part (16) formed in the through-hole to receive the valve body part expanded due to a pressure in the capacitor case, and a stopper (stopper wall 10) that includes an opening part (20) for discharging the gas passing through the valve body part and that comes into contact with a portion of the valve body part in the storage part to deform the valve body part. This achieves an increase in gas permeability of the pressure valve and a high operating pressure maintained in the pressure valve.

Abstract: An energy storage device comprising a container, a mandrel, at least one sheet of separator material, and two or more electrodes. The container comprises an inner surface. The mandrel comprises a mandrel surface, and is positioned within the container so that the mandrel surface is spaced apart from the inner surface to define a cavity within the container. The container has a packing axis that passes through the cavity, the mandrel surface, and the inner surface. The mandrel is compressible in the direction of the packing axis, the at least one sheet of separator material is arranged in the cavity to provide a plurality of separator layers along the packing axis, and an electrode is provided between the separator layers.

Abstract: A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly including a first electrode, a separator, and a second electrode; a case that accommodates the electrode assembly, and of which one side through which the electrode assembly is inserted is opened; a cap assembly provided in the opening of the case by being fixed thereto; a vent hole that is formed in a bottom plate of the case, and of which side walls are multi-stepped; and a vent member provided in the vent, wherein a depth of the vent is greater than a thickness of the bottom plate.

Abstract: A power supply with an inner housing including a first plate and a second plate arranged spaced apart from each other. The inner housing further includes a channel comprising at least one channel side wall encompassing a channel passage extends in a longitudinal direction between a first plate opening arranged at the first plate and a second plate opening arranged at the second plate. At least one electronic component of the power supply is thermally coupled to the channel side wall.

Abstract: A battery spacer comprises: a cylindrical case body into which a battery is inserted; a bottom wall portion with which an anode-side end of the battery is to come into contact, the bottom wall portion having an anode exposure hole from which a negative terminal of the battery is partially exposed; an annular top wall member that is located opposite to the bottom wall portion 8 and has a central opening into which the battery is inserted; a plurality of anode-side catching pieces that have anode-side engagement hooks extending from the circumference of the anode exposure hole toward the interior of the case body and engaging with an anode-side outer peripheral surface of the battery, and hold the anode side of the battery; and a plurality of cathode-side catching pieces that have cathode-side engagement hooks extending from the circumference of a central opening toward the interior of the case body and engaging with a cathode-side outer peripheral surface of the battery, and hold the cathode side of the batter

Abstract: The invention relates to a feed-through comprising a terminal for a metal-ion electrochemical accumulator, produced through an orifice emerging either side of a wall comprising two opposite faces, comprising: a closure means in abutment against the chamfer of at least one through passage forming a seat inside the feed-through; a compression means housed in the through duct, the compression means being adapted to keep the closure means pressed against its seat along a continuous peripheral surface, up to a predetermined pressure of the gases prevailing inside the accumulator, beyond which pressure said gases may escape towards the outside of the accumulator through the passage and the through duct.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: A cell module includes a plurality of battery cells each having a safety valve at a first end in a height direction, a first current collector plate including a main body having a through hole that at least partly overlaps the safety valve when viewed along the height direction and a lead extending into the through hole from the main body and being electrically connected to a first terminal of each of the battery cells, an exhaust duct disposed over a surface of the first current collector plate remote from the battery cells, and an insulating film being made of an insulating material and covering an area of the first current collector plate facing the exhaust duct. The safety valve opens when an internal pressure of any of the battery cells reaches or exceeds a predetermined level.

Abstract: A battery pack includes a housing accommodating a battery cell and having a throughhole; and a pressure equalization device coupled to the throughhole and equalizing internal and external pressures of the housing, wherein the pressure equalization device includes a first pressure equalization member configured to equalize the internal and external pressures of the housing when a variation in the internal pressure of the housing is smaller than a reference pressure variation; and a second pressure equalization member configured to equalize the internal and external pressures of the housing when the variation in the internal pressure of the housing is greater than the reference pressure variation.

Abstract: A battery block is provided with: a plurality of cylindrical batteries of each of which the two ends are formed as positive and negative electrodes; and a lead plate which is connected to the electrodes of the cylindrical batteries. The cylindrical batteries are provided with battery cans having bottom plates provided with bottom surface electrodes and exhaust valves. The exhaust valves which are provided in the bottom plates open as a result of thin-walled lines breaking at a threshold pressure. The exhaust valves are provided inside the loop-shaped thin-walled lines provided in the bottom plates, said thin-walled lines having unconnected portions. The unconnected portions form hinge parts. Furthermore, the bottom surface electrodes provided in the bottom plates connect the lead plate to the hinge parts. The lead plate has cut-out portions provided in positions facing areas including the thin-walled lines.

Abstract: An embodiment is directed to a multi-layer contact plate configured to establish electrical bonds to battery cells in a battery module. The multi-layer contact plate includes two or more primary conductive layers (e.g., Al, Cu, etc.), and a cell terminal connection layer (e.g., steel, Al, Cu, etc.) that is joined with, and sandwiched by, the two or more primary conductive layers. A portion of the cell terminal connection layer is configured to form a set of bonding connectors (e.g., bonding ribbons) to provide a direct electrical bond between the multi-layer contact plate and terminals (e.g., positive terminals, negative terminals, or a combination thereof) of at least one group of battery cells (e.g., a single group of battery cells, two groups of battery cells that are connected in series, etc.).

Abstract: An electric power system such as, for example, a circuit, an electric appliance, an electric generator, and/or an energy storage system, can be coupled with a negative thermal expansion component. The negative thermal expansion component can be formed from a material having negative thermal expansion properties such that the negative thermal expansion component contracts in response to an increase in temperature. The contraction of the negative thermal expansion component can form a nonconductive gap that disrupts current flow through the electric power system. The disruption of the current flow can eliminate hazards associated with the electric power system overcharging, overheating, and/or developing an internal short circuit.

Abstract: A battery (10) comprises a safety vent assembly (100). The safety vent assembly (100) comprises a sealing member (104) and an urging member (106) to urge the sealing member (104) against a venting aperture (105) on a battery reaction chamber to seal the battery reaction chamber when pressure inside the battery reaction chamber is below a venting threshold pressure under normal operation conditions, wherein the sealing member (104) is operable to provide a venting path to vent gas from the battery chamber when pressure inside the battery chamber reaches the venting threshold pressure which is sufficient to overcome the urging force of the sealing member (104), and wherein the urging member (106) is to permanently deform on reaching a venting threshold temperature such that gas venting from the battery chamber will occur at a pressure below the venting threshold pressure.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: Disclosed is a lead-acid battery including: a battery container; an electrolyte and an electrode plate group in the battery container; and a battery container cover that hermetically seals an opening of the battery container, wherein the electrode plate group includes a positive electrode plate including a positive electrode active material, a negative electrode plate including a negative electrode active material, and a separator interposed between the positive electrode plate and the negative electrode plate, the battery container cover is provided with a liquid port, a liquid port plug that closes the liquid port, and a sleeve that hangs down from the liquid port to a prescribed liquid surface height of the electrolyte, a sodium ion concentration contained in the electrolyte is 1 mmol/L to 90 mmol/L, and a specific surface area of the positive electrode active material is 5 m2/g to 9 m2/g.

Abstract: A battery cell includes an electrode, a terminal, and a current-interrupt device configured to electrically isolate the terminal from the electrode. The current-interrupt device includes a plate connected to the electrode and defining a hole, and a diaphragm connected to the terminal and joined to the plate forming a ceiling of the hole. A cover of the current-interrupt device is joined to the plate forming a floor of the hole. A dielectric fluid is disposed in the hole. The diaphragm and cover are configured to move toward the terminal, in response to pressure within the cell exceeding a threshold, to separate the diaphragm from the plate forming a gap therebetween and to release the fluid into the gap preventing current from arching across the gap.

Abstract: A battery pack according to an exemplary aspect of the present disclosure includes, among other things, an enclosure that establishes a vent chamber and tubing in fluid communication with the vent chamber. A check valve is mounted outside of the enclosure and is connected to the tubing. The check valve permits flow of battery vent byproducts in a first direction but blocks the flow of atmospheric air in a second, opposite direction.

Abstract: Provided are an analysis apparatus and an analysis method which are capable of recognizing a local state change of an internal structure of a secondary battery. The analysis apparatus includes: an observation cell that houses a secondary battery; a charging and discharging controller that controls charging and discharging of the secondary battery; an image pickup device that captures color images of the secondary battery at a predetermined time interval; and a charging and discharging data detection unit that acquires charging and discharging data on the secondary battery during charging and discharging. Color image signals output from the image pickup device and charging and discharging data signals output from the charging and discharging data detection unit are supplied to a signal processing device. The signal processing device outputs a unit that temporally links time-series color image signals and time-series charging and discharging data signals, and designated analysis data.

Abstract: The present invention relates to a storage-battery vent cap which adjusts an internal pressure of a storage battery by exhausting a gas generated inside the storage battery to the outside and blocking inflow of external air. The vent cap includes a cylindrical body installed in a vent hole of the battery and formed with an exhaust hole; a cylindrical insert coupled to the body, a partition being formed inside the insert and a coupling hole and a air vent being formed in the partition; and a valve fixed to the coupling hole and elastically deformed by an internal pressure of the battery to open the air vent. The valve has an umbrella-like shape including a valve body having a larger diameter than that of the coupling hole, a cover formed on an outer circumferential surface of the valve body, and a fixing portion downwardly protruded from the valve body.

Abstract: Operating a battery assembly that includes one or more rechargeable battery cells includes: monitoring one or more operational parameters of the battery cells; and dynamically controlling pressure applied to the one or more battery cells based at least in part on one or more of the monitored operational parameters.

Abstract: A power supply apparatus includes a formed article having two or more separate accommodating cavities and an electrode group that comprises a rolled up laminate and is accommodated in each of the accommodating cavities, the laminate composed of a cathode and an anode, each having a current collector and mixture layers disposed on the current collector, and a separator sandwiched between the cathode and the anode. An electrolytic solution is accommodated in each of the accommodating cavities, the electrolytic solution, and the anode or the cathode contact the formed article.

Abstract: An apparatus for detecting a failure of a battery includes a plurality of cell internal pressure sensors each provided in a corresponding one of a plurality of battery cells to measure internal pressure of the battery cells and generate and transmit pressure signals, a sensing unit for receiving the pressure signals to sense the internal pressure of the battery cells, a control logic unit for receiving the internal pressure data of each of the battery cells and determining a battery cell having cell internal pressure outside of a predetermined normal range of internal pressure of the battery cell as a failed cell, and a battery control unit for controlling charging or discharging of the other battery cells of the battery except for the failed cell while the failed cell is being repaired or replaced.

Abstract: Batteries 100 are accommodated in a case 20, wherein the batteries 100 each include an opening portion 8a for releasing gas produced in an associated one of the batteries to outside the battery, the case 20 is partitioned into an accommodation section 50 configured to accommodate the batteries 100 and an exhaust passage 60 configured to expel the gas released from at least one of the opening portions 8a of the batteries 100 to outside the case 20, the opening portions 8a of the batteries 100 are allowed to communicate with the exhaust passage 60 through sealed connection passages 40, and a one-way open valve 70 which is configured to open only along a direction from the opening portion 8a of the battery 100 to the exhaust passage 60 is provided in an intermediate portion or at an end of each of the connection passages 40.

Abstract: An electrochemical cell is provided including, but not limited to, a can having a side wall that is coupled to a first end and having a cover at a second end of the can to close the second end of the can, a cell element within the can, electrolyte within the can, and a safety device. The can forms a vent at the first end configured to allow gases and/or effluent to exit the can once the pressure inside the can reaches a predetermined amount. The safety device is provided adjacent a first end of the cell element and between the cell element and the first end of the housing. The safety device is configured to exert an additional force on the vent to aid in the deployment of the vent.

Abstract: A battery pack of the type that may be used in an electrically-powered vehicle comprises first and second arrays of cells disposed adjacent one another, and a housing enclosing the two arrays. The housing defines a cooling chamber surrounding heat transfer surfaces of the cells, a first manifold sealed from the cooling chamber and collecting gasses generated by the first array, and a second manifold sealed from the cooling chamber and collecting gasses generated by the second array. A tunnel connects the first and the second manifolds to allow passage of any collected gasses from the first manifold into the second manifold, and a discharge opening in the second manifold allows the collected gasses to escape from the housing. An electrically conductive bridge bar extends through the tunnel and connects the first array with the second array.

Abstract: A rechargeable battery including an electrode assembly including first and second electrode plates, each of which includes an electrode uncoated portion and a separator interposed between the first and second electrode plates, and at least one current collector plate, each current collector plate contacting one of the electrode uncoated portions of the first and second electrode plates, wherein each current collector plate includes a protrusion protruding toward the electrode assembly and having a contact portion contacting one of the electrode uncoated portions, and a slit in the contact portion disposed at a predetermined angle with respect to the direction of the electrode assembly.

Abstract: A container of an electrochemical double-layer capacitor includes a housing, a cap portion adapted to be coupled the housing, an orifice passing through one of the housing or the cap portion, and a vent assembly in fluid communication with the container and secured within the orifice. The housing and the cap portion define an interior envelope of the container, and at least a portion of the vent assembly is located inside the interior envelope of the container.

Abstract: A vehicle with electric propulsion, which presents a longitudinal direction, which is parallel to the direction of the rectilinear motion, and a transverse direction, which is perpendicular to the longitudinal direction; a storage system is provided with a pack of chemical batteries, which are connected to each other in series and in parallel and comprise respective electrochemical cells; each chemical battery has a cylindrical shape having a central symmetry axis; and the storage system is fitted inside the vehicle in such a way that the central symmetry axis of each chemical battery is not parallel either to the longitudinal direction of the vehicle or to the transverse direction of the vehicle.

Abstract: A rechargeable battery module including at least two unit cells, each unit cell having a positive electrode terminal and a negative electrode terminal, each unit cell having a side surface disposed crosswise to one direction, the at least two unit cells overlapping at their side surfaces, a positive electrode terminal and a negative electrode terminal respectively, of different unit cells being coupled to each other and facing each other, and a conductive spacer interposed between the positive electrode terminal and the negative electrode terminal of the respective unit cells, and electrically connecting the positive electrode terminal and the negative electrode terminal to each other.

Abstract: A pouch-cell battery arrangement has a shrink sleeve covering (50), that surrounds the pouch (22) at least in places in an interlocking manner.

Abstract: A power supply device comprises a battery assembly formed by stacking secondary battery cells having safety valves for exhausting gas, end plates being arranged at both end faces of the battery assembly in the stacking direction, a gas duct guiding gas emitted from the safety valves in a prescribed gas exhaust passage, and fixing portions fixing both ends of the gas duct to the end plates in a position where the gas duct faces the safety valves. In a state in which the gas duct is fixed to the end plates in at least one of the fixing portion a fixing opening of a slit is formed extending in the direction parallel to the direction in which the secondary battery cells are stacked, and a fixing member is inserted into the slit fixing opening.

Abstract: A rechargeable battery according to the present invention includes an electrode assembly that includes a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode, a case that contains the electrode assembly and a cap assembly that is connected to the case. The positive electrode includes a current collector and a positive active material layer that includes an NCM-based positive active material disposed at the collector. The cap assembly includes a vent plate having a notch, and a current interrupt portion that interrupts electrical connection in a case of an increase in pressure inside the case. When a current interrupt pressure of the current interrupt portion is “A,” a vent fracture pressure at which the vent plate fractures at the notch is “B,” and the capacity of the rechargeable battery is “X,” they satisfy a formula of A/B=1.22?0.39X+D (?0.08?D?0.08).

Abstract: The present invention relates to a case system for lead batteries. The case system comprises of a one piece, essentially box shaped cell-housing part with at least 4 sidewalls enclosing an interior volume. At least one division plane divides said interior volume, such as to form a plurality of compartments. Each of the compartments is adapted for storing an electrical cell. The case system further comprises an access wall part with electrical conductor openings or terminal feed throughs and at least one fluid channel opening. Furthermore the case system comprises a closure wail part for sealing off said casing system. Each of the at least one division planes is essentially perpendicular to the same two opposite side walls of the essentially box shaped cell housing. The present invention further relates to a lead battery and a battery rack incorporating the above described advantageous case system.

Abstract: An energy storage apparatus includes one or more energy storage devices and an outer housing that houses the one or more energy storage devices. The outer housing includes a communication part defining a passageway allowing communication between an interior and an exterior of the outer housing, and the communication part includes a functional membrane that allows passage of gas and prohibits passage of liquid.

Abstract: A secondary battery includes a battery unit that has an accommodation space for an electrode assembly, a vent housing that defines a housing space connected with the accommodation space through a first vent hole, the vent housing including a second vent hole through which the housing space is connected with an outside of the secondary battery, a revolving member that is rotatably mounted between a closing position for closing the first and second vent holes and an opening position for opening the first and second vent holes, and first and second sealing caps that are formed at opposite sides of the revolving member with respect to a rotation axis of the revolving member. The first and second sealing caps respectively close the first and second vent holes, when the revolving member is mounted at the closing position.

Abstract: A battery cell includes a battery housing case formed with a through hole communicating with an interior space, a hollow rivet, and a seal rubber. The hollow rivet has a seal surface annularly extending outside the battery housing case, and a hollow portion formed with an exhaust port continuous to the inner edge of the seal surface and positioned at the through hole to allow gas in the interior space to flow out through the exhaust port. The seal rubber has a contact unit extending annularly facing the seal surface to press the seal surface and is provided so as to close the exhaust port. The contact unit is formed to project toward the seal surface so as to contact the seal surface at a position away from the inner edge of the seal surface. Such an arrangement prevents an electrolyte leakage over a long period of time.

Abstract: A sealed battery (10) provided by the present invention includes: a current cut-off valve (22); and a connecting member (30) having an engagement hole (34) formed in a location adjacent to the current cut-off valve. The current cut-off valve is conductively connected to the connecting member by joining linearly to a peripheral edge of the engagement hole and/or joining at a surface that is in contact with an inner wall of the engagement hole in a state in which part of the current cut-off valve is fitted into the engagement hole. When an internal pressure of a battery case (40) rises above a predetermined level, the current cut-off valve is deformed outward of the case by the internal pressure, the current cut-off valve is separated from the connecting member, and the electric connection between the connecting member and the current cut-off valve is broken.

Abstract: A battery system, in particular a lithium-ion battery system, comprising a discharge line (AL) with an opening for discharging substances which are produced in the battery system, in particular gases, to the surroundings of the battery system.

Abstract: A secondary battery includes an electrode assembly comprising a first electrode plate, a second electrode plate, and a separator located between the first electrode plate and the second electrode plate; a case accommodating the electrode assembly; and a cap assembly coupled to the case, wherein the cap assembly comprises a cap plate sealing the case and having a short-circuit hole, an inversion plate in the short-circuit hole of the cap plate, a connection plate covering the short-circuit hole of the cap plate, and an insulation layer on the inversion plate or the connection plate.

Abstract: The present disclosure provides a system, method, and apparatus for battery thermal management. In one or more embodiments, the disclosed method involves sensing, with at least one temperature sensor, a temperature of at least one battery cell, where at least one battery cell is at least partially submerged within a liquid contained within a battery case. The method further involves comparing the temperature of at least one battery cell with a maximum threshold temperature, and commanding a cooling unit to be activated when at least one processor determines that the temperature of at least one battery cell is above the maximum threshold temperature. Further, the method involves circulating, by at least one pump, the liquid via tubing from the battery case to the cooling unit back to the battery case.

Abstract: A hermetic battery including: a safety valve through which gas generated in the battery due to increase in pressure in the battery is discharged outside the battery, wherein the safety valve includes a first safety valve 9a, 10 which is operated at a first operating pressure, and a second safety valve 15a which is operated at a second operating pressure higher than the first operating pressure, a rate at which the gas is discharged while the second safety valve 15a is operated is higher than a rate at which the gas is discharged while the first safety valve 9a, 10 is operated, and the first safety valve 9a, 10 is closed at least while the second safety valve 15a is operated.

Abstract: A rechargeable battery, which can improve safety, control operating level of a short-circuiting member, prevent external moisture from being induced to a short-circuiting member to cause a short-circuit, and can efficiently utilize an internal space. In an embodiment, the rechargeable battery includes an electrode assembly, a collector plate electrically connected to the electrode assembly, a case housing the electrode assembly and the collector plate, a cap plate sealing the case and having a short-circuiting groove formed at a lower portion thereof, and a short-circuiting member formed between the cap plate and the collector plate, wherein the short-circuiting member is coupled to the short-circuiting groove of the cap plate.

Abstract: An aircraft comprises a rechargeable battery including an array of battery cells, and means for mitigating consequences of failure of the rechargeable battery due to aircraft operating cycles.

Abstract: Disclosed is a secondary battery having a structure in which a jelly-roll having a cathode/separator/anode structure is mounted in a cylindrical battery case, wherein a plate-shaped insulator mounted on the top of the jelly-roll includes a perforated inlet enabling gas discharge and penetration of electrode terminals, and a plurality of fine pores that allow permeation of an electrolyte solution, but do not allow permeation of foreign materials having a size of 100 ?m or higher.