Abstract: A nonaqueous electrolyte secondary battery includes a prismatic housing having an opening and a sealing member sealing the opening. The prismatic housing contains a flat-wound electrode assembly and a nonaqueous electrolyte. The flat-wound electrode assembly includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode substrate and a positive electrode active material mixture layer formed on the positive electrode substrate. The positive electrode active material mixture layer contains lithium carbonate and lithium phosphate. The nonaqueous electrolyte contains lithium fluorosulfonate.

Abstract: Provided is a battery system having improved safety and reliability. The battery system includes a battery module including a unit cell and a cell controller performing control of the unit cell and a battery controller performing control of the battery module; the cell controller includes an abnormality diagnosis unit which diagnoses the presence or absence of abnormality of the unit cell, a state detection unit which calculates any one or more of voltage, current, temperature, SOC, SOH, and allowable charge/discharge current of the unit cell, a power line communication unit which performs wire communication, and a wireless communication unit which performs wireless communication, the information diagnosed by the abnormality diagnosis unit is output through the power line communication unit to the battery controller; and the information calculated by the state detection unit is output through the wireless communication unit to the battery controller.

Abstract: A packaging material 1 for a power storage device is configured to include a polyamide resin layer 2 as an outer layer, a polyolefin resin layer 3 as an inner layer, and an aluminum foil layer 4 arranged between both the layers. A thickness of the packaging material 1 for a power storage device is 90 ?m or less, a tensile breaking strength of the packaging material for a power storage device is 110 N/15 mm width or more, and a tensile breaking elongation of the packaging material for a power storage device is 90% or more. This enables to provide a packaging material for a power storage device thin in thickness and light in weight which is capable of securing excellent formability even when deep shape forming is performed and also is high in mechanical strength and excellent in impact resistance.

Abstract: A nonaqueous electrolyte secondary battery includes an electrode body and an electrolytic solution in an outer can and a cathode external terminal on the open-end side of the outer can. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a seal lead, a diaphragm, and a dielectric film. The seal lead has a cylindrical opening on the electrode body side. The diaphragm tightly closes the cylindrical opening and, in response to the increased internal pressure in the battery, deforms to interrupt the electrical coupling between the electrode body and the seal lead. The dielectric film is on the electrode body side of the diaphragm.

Abstract: A rectangular secondary battery (1) includes a current interrupting portion (60) disposed in a current path between a collector plate (21) connected to a rolled electrode group (40) and an external terminal (61) disposed outside a battery container (2) and configured to interrupt the current path when an internal pressure of the battery container (2) is increased. The current interrupting portion (60) has a diaphragm (68) electrically connected to the external terminal (61) and deformed when the internal pressure of the battery container (2) is increased, a connection plate (24) connected to the diaphragm and disconnected from the diaphragm by the deformation of the diaphragm, and a connecting portion (23) connecting the connection plate and collector plate. A rigidity of the connecting portion (23) is lower than that of the collector plate (21).

Abstract: The present disclosure relates to a battery cell. The battery cell includes: an electrode assembly; a pouch which wraps around the electrode assembly; an electrode tab extended from the electrode assembly; a lead tab attached to the electrode tab; and a current interrupt device which is configured to block reconnection of the lead tab and the electrode tab when the pouch is shrunk to return to an original position after being expanded, while blocking current flow by separating the lead tab and the electrode tab through the expansion of the pouch, when abnormal situation of battery cell occurs.

Abstract: In a deformation detection method for a sealed-type rechargeable battery 1 in which an electrode group 22, which is formed by stacking a positive electrode 23 and a negative electrode 24 with a separator 25 interposed therebetween, is accommodated in a sealed outer casing 21, a polymer matrix layer 3 is attached to an outer surface of a wall portion 28a of the outer casing 21 that faces the electrode group 22 in a thickness direction of the positive electrode 23 and the negative electrode 24 or in a direction perpendicular to the thickness direction. The polymer matrix layer 3 contains a filler that is dispersed therein and that changes an external field in response to deformation of the polymer matrix layer 3. Change in the external field accompanying the deformation of the polymer matrix layer 3 is detected by a detection unit 4.

Abstract: A battery mounting structure is provided to prevent water intrusion into a clearance between a battery pack and a floor panel of a vehicle. The battery mounting structure comprises: frame members extending longitudinally on both sides of the vehicle; a floor panel disposed between the frame members; and a battery pack situated underneath the floor panel. A sealing member is interposed between a periphery of the battery pack and a portion extending from a member opposed to the battery pack, and a drain hole is formed in the sealing member to connect an inner side and an outer side of the sealing member.

Abstract: A battery includes a battery case, an electrode assembly, positive and negative electrode collectors, a sealing body, an external terminal, a conducting member, a deforming plate, and a first insulating member. The positive or negative electrode collector has a base portion facing the first insulating member, and a lead portion connected to the electrode assembly. A fixing portion fixing the base portion and the first insulating member to each other is provided in the first insulating member. The fixing portion is located nearer to the connection portion between the deforming plate and the positive or negative electrode collector than the sealing body side support position of the first insulating member. The outer peripheral edge of the electrode assembly side surface of the first insulating member is provided with a rib protruding to the electrode assembly side and extending along the outer peripheral edge of the base portion.

Abstract: A sealed battery with a battery element housed in a sealed casing. The sealed battery includes a valve brought into a closed state when a pressure of a gas in the casing is less than a first pressure P1, into an open state when the pressure is more than or equal to the first pressure P1 and less than a second pressure P2, and into the closed state when the pressure is more than or equal to the second pressure P2, and a safety mechanism configured to, when the internal pressure reaches a third pressure P3 exceeding the second pressure P2, operate in accordance with the third pressure P3.

Abstract: An electricity storage device includes an electrode assembly, a case, a first terminal, and a second terminal. The electrode assembly includes one or more first electrodes and one or more second electrodes, which are stacked alternately with one or more separators in between. The case accommodates the electrode assembly. The first terminal and the second terminal are located on a wall portion of the case. First tabs and second tabs are provided on ends of the first and second electrodes, respectively. A circuit breaker is arranged between the second terminal and the electrode assembly. A part of the first terminal and the first tabs are arranged along the width direction of the electrode assembly, and the circuit breaker and the second tabs are arranged along the width direction of the electrode assembly.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode plate including a positive electrode core and a positive electrode mixture layer formed thereon; a negative electrode plate including a negative electrode core and a negative electrode mixture layer formed thereon; a wound electrode assembly in which the positive electrode plate and the negative electrode plate are wound with a separator therebetween so as to be insulated from each other; a nonaqueous electrolyte solution; a pressure-responsive current interruption mechanism electrically connected to at least one of the positive electrode plate and the negative electrode plate; and an outer casing. Excess electrolyte solution is present outside the electrode assembly in the outer casing. The liquid level of the excess electrolyte solution is at such a height that the excess electrolyte solution does not come into contact with a component of the current interruption mechanism when the outer casing is placed horizontally.

Abstract: A rechargeable battery is provided with a pressure release valve and a current interruption mechanism. The current interruption mechanism includes a deformation plate. When the internal pressure of the case reaches an interruption activation pressure, the deformation plate receives the internal pressure and is deformed to break a conducting portion. In the current interruption mechanism, a pressure that is set for maintaining the sealing at the contact portion between the deformation plate and a negative electrode conductor is defined as a sealing portion withstanding pressure, and the pressure that is set for maintaining the shape of the case is defined as a case withstanding pressure. The pressure for activating the pressure release valve is defined as a valve activation pressure. In this case, the sealing portion withstanding pressure and the valve activation pressure are set higher than the interruption activation pressure and lower than the case withstanding pressure.

Abstract: A method is provided for examining the leaktightness of a closed housing of an electrical component. This method includes flooding the housing with a gas mixture that contains a high proportion of an inert gas and a low residual proportion of a gas that can be detected by a measuring probe. During the flooding process, gas that is located inside the housing is forced out of the housing. The method proceeds by determining any leak in the housing by detecting gas escaping from the housing, installing the electrical component when the housing is proven to be leaktight, with the inert gas remaining in the housing.

Abstract: A rechargeable battery includes an electrode assembly including a positive electrode and a negative electrode, a case for accommodating the electrode assembly, a cap plate combined to the case, a vent plate disposed under the cap plate and formed with a notch, a middle plate disposed under the vent plate, and a heat-resistant insulating layer disposed between the vent plate and the middle plate.

Abstract: A rechargeable battery includes an electrode assembly comprising electrodes having coated and uncoated regions, being located on opposite sides of a separator and spirally wound together with the separator; a case accommodating the electrode assembly; an insulating plate on the electrode assembly and having a protruding portion and internal terminal holes; and a cap plate sealing the case and having terminal holes, wherein each of the electrode terminals passes through a respective one of the internal terminal holes to protrude from that terminal hole.

Abstract: A battery module including at least one battery cell, a shunt resistor above a safety vent of the battery cell, and a plurality of fusible conductors connecting the shunt resistor to a charging/discharging current path. The shunt resistor measures a charging/discharging current of the battery cell. The fusible conductors include a material which melts when heated by a gas discharged through the safety vent.

Abstract: A secondary electrochemical battery sealing body, including a negative electrode cap, a circuit board module, and an insulating gasket. A battery case has a recessed wire turn structure at an end thereof adjacent to the negative electrode cap. The circuit board module is located between the wire turn and the negative electrode cap, and multiple electronic components are arranged thereon. The negative electrode cap and the circuit board module constitute a first enclosed electromagnetic shielding space. The battery case and the circuit board module constitute a second enclosed electromagnetic shielding space. The electronic component is provided within the first enclosed electromagnetic shielding space and the second enclosed electromagnetic shielding space. The insulating gasket has a “” shape in section, and is disposed within gaps of the battery case, the circuit board module and the negative electrode cap.

Abstract: A cylindrical lithium ion battery in which an electrode group formed by winding a positive electrode and a negative electrode is housed in a battery case is disclosed. A sealing plate seals an opening of the battery case. An insulating plate having a plurality of openings is provided on a side of the electrode group closer to the sealing plate. The plurality of openings include a first hole with a largest opening area, and a plurality of second holes with opening areas smaller than the opening area of the first hole. An opening ratio of the first hole is 12% or more and 40% or less; a sum of opening ratios of the second holes is 0.3% or more and 10% or less; and a total opening ratio of all the openings is 20% or more and 50% or less.

Abstract: A secondary battery 1 includes a conductive member 130 that is provided in the secondary battery 1, and a current interrupt device 105 that is provided in the secondary battery 1 and has a reversal plate 120 that is welded to the conductive member 130. The conductive member 130 and the reversal plate 120 have thicknesses of T1 and T2, respectively, in the part in which the conductive member 130 and the reversal plate 120 are opposed to and in contact with each other, and the thicknesses T1 and T2 satisfy the relationship T1/T2<1.5.

Abstract: In a configuration where an annular thin portion 50 is formed integrally with a lid main body 4 by coining, a bulging portion 6 is formed integrally with the lid main body 4 so as to bulge out from the lid main body 4, and the annular thin portion 50 is provided in a flat portion 61 of the bulging portion 6.

Abstract: A lithium-ion battery module has a housing and a plurality of lithium-ion battery cells disposed in the housing. Each of the plurality of lithium-ion battery cells includes a first terminal with a first polarity, a second terminal with a second polarity opposite to the first polarity, an overcharge protection assembly, and a casing electrically coupled to the first terminal such that the casing has the first polarity, where the casing has an electrically conductive material. The lithium-ion battery module also includes a vent of the overcharge protection assembly electrically coupled to the casing and a conductive component of the overcharge protection assembly electrically coupled to the second terminal, and the vent is configured to contact the conductive component to cause a short circuit and to vent a gas from the casing into the housing when a pressure in the casing reaches a threshold value.

Abstract: An energy storage device, including a housing part, in which at least one electrical storage cell as well as a connecting element are arranged. The electrical energy storage cell is electrically connected to an electrical connection arranged or formed on at least one freestanding outer wall section of the housing part. The at least one electrical connecting element is surrounded at least in sections by at least one electromagnetic damping element for attenuation of electromagnetic emissions.

Abstract: A rechargeable battery includes: an electrode assembly comprising: a first electrode and a second electrode; a case comprising an opening at a side of the case, the case accommodating the electrode assembly; a cap assembly comprising a cap plate covering the opening of the case, a first terminal protruding out of the cap plate and electrically coupled to a first electrode, and a second terminal protruding out of the cap plate and electrically coupled to a second electrode; a first current collector coupled to a lower part of the cap assembly and having a first side electrically connected to the first terminal and a second side coupled to the first electrode; and a deformation preventer coupled to the lower part of the cap assembly and formed to accommodate a part of the first current collector.

Abstract: The present disclosure includes a battery module having a plurality of battery cells disposed in a housing. Each of the plurality of battery cells has a positive terminal, a negative terminal, an overcharge protection assembly, and a casing having an electrically conductive material. The overcharge protection assembly includes a vent, a first spring component, a second spring component, and an insulative component. The first spring component is coupled to the positive terminal, the second spring component is coupled to the negative terminal, the insulative component is between the first spring component and a conductive piece and between the second spring component and the conductive piece, and the vent is configured to drive the insulative component from between the first and second spring components and the conductive piece, such that the first and second spring components contact the conductive piece, when a pressure in the casing exceeds a threshold.

Abstract: A rechargeable battery includes: an electrode assembly including a first electrode and a second electrode; a case for accommodating the electrode assembly; a first current collector coupled to the first electrode and including a fuse; and a second current collector coupled to the second electrode. First and second blocking members are positioned on the first current collector at a distance from each other with the fuse 10 interposed inbetween and each blocking member includes a nonconductor.

Abstract: A sealing member 40 to seal an opening of a battery can, the sealing member being used to configure a tube-shaped battery provided with a bottomed tube-shaped battery can and a power generating element that has been arranged inside the battery can, the sealing member 40 includes an electrode terminal that is to be electrically connected to the power generating element, a sealing plate 41, insulating gaskets 42a, 42b, and a washer 44. An inserting part 43b extending from the electrode terminal 43 is inserted through these elements so that the elements are integrally tightened. The insulating gasket 42a is provided with a protruding part 42a1 having an appropriate horizontal section shape, and the sealing plate 41 adjacent to the insulating gasket is provided with a recess part 41a that has been formed in a shape corresponding to the protruding part 42a1.

Abstract: A high energy density rechargeable (HEDR) battery employs a combined current limiter/current interrupter to prevent thermal runaway in the event of internal discharge or other disruption of the separator. The combined current limiter/current interrupter is interior to the battery.

Abstract: A rechargeable battery includes an electrode assembly including first and second electrodes; a case accommodating the electrode assembly; a cap plate coupled to the case and having a short-circuit opening formed therein; a first electrode terminal electrically connected to the first electrode; a second electrode terminal electrically connected to the second electrode; a short-circuit member fixed to the cap plate in the short-circuit opening and configured to electrically connect the first electrode and the second electrode to each other; and a top insulation member covering the short-circuit member and having a plurality of air holes formed therein.

Abstract: A rechargeable battery includes a conductive case including a bottom part and a wall part extending from a periphery of the bottom part, an electrode assembly including a positive electrode and a negative electrode, and accommodated in the case, a cap plate opposite to the bottom part and electrically connected to the case, a positive terminal fixed to the cap plate and electrically connected to the cap plate, a negative terminal fixed to the cap plate and electrically insulated from the cap plate, a positive electrode tab extending from the positive electrode and electrically connected to the bottom part, and a negative electrode tab extending from the negative electrode, facing the positive electrode tab, and electrically connected to the negative terminal, wherein a length of the cap plate in a first direction is less than a height of the wall part in a second direction.

Abstract: A rechargeable battery system, a battery pack, and methods of manufacturing the same are disclosed herein. The rechargeable battery system and/or battery pack can be for an electric vehicle. The rechargeable battery system and/or battery pack can include a plurality of battery cells arranged into one or more rows, a busbar, and a housing. The housing can include a plurality of receptacles that can engage with the plurality of battery cells to secure a relative position of the plurality of battery cells with respect to each other. The housing can define a cooling duct in thermal connection with the plurality of receptacles.

Abstract: Disclosed herein is a battery cell including an electrode assembly of a cathode/separator/anode structure, the electrode assembly being impregnated with an electrolyte, the electrode assembly being chargeable and dischargeable, a battery case in which the electrode assembly is mounted, the battery case being made of aluminum or an aluminum alloy, and an alumina coating layer applied to at least a portion of an outer surface of the battery case by anodizing.

Abstract: Electrochemical cells and methods of making electrochemical cells are described herein. In some embodiments, an apparatus includes a multi-layer sheet for encasing an electrode material for an electrochemical cell. The multi-layer sheet including an outer layer, an intermediate layer that includes a conductive substrate, and an inner layer disposed on a portion of the conductive substrate. The intermediate layer is disposed between the outer layer and the inner layer. The inner layer defines an opening through which a conductive region of the intermediate layer is exposed such that the electrode material can be electrically connected to the conductive region. Thus, the intermediate layer can serve as a current collector for the electrochemical cell.

Abstract: A system and method for maintaining the face of an optical window at a desired axial position with respect to the face of a high pressure housing, suitable for use in a high pressure optical flow cell for a real time optical particle monitoring system. The window fits within a mounting hole that extends through the pressure housing. The window has a smaller-diameter cylindrical end portion extending to the high pressure side and an opposite larger-diameter cylindrical end portion, with a shoulder between the cylindrical end portions. A threaded retaining member axially compresses a gasket, o-ring, or other compliant sealing member between the shoulder of the optical window and a corresponding shoulder in the mounting hole, creating a static seal and maintaining the high pressure face of the optical window at a desired position over a wide range of temperatures and pressures.

Abstract: In one aspect, an input device includes a housing, an element on at least a portion of the housing for providing input to a touch-enabled display, a battery compartment in the housing in which a battery may be positioned, and a vent through the housing which permits gas from the battery to pass to exterior to the housing.

Abstract: A sealing body according to the present invention is sealing body for a sealed battery including conductive terminal cap, a conductive explosion-proof valve electrically connected to the terminal cap, a conductive terminal plate having an abutting surface abutting the explosion-proof valve, and an insulating plate disposed between the explosion-proof valve and the terminal plate. A welded part between the explosion-proof valve and the terminal plate is formed in the inner part of the abutting surface, and the plan-view shape of the welded part is a shape defining an enclosed region, a C-shape, or a spiral shape. A notch part surrounding the welded part is formed in the terminal plate. The breaking pressure of the welded part is higher than the breaking pressure of the notch part.

Abstract: A feed-through, for example a battery feed-through for a lithium-ion battery or a lithium ion accumulator, has at least one base body which has at least one opening through which at least one conductor, for example a pin-shaped conductor, embedded in a glass material is guided. The base body contains a low melting material, for example a light metal, such as aluminum, magnesium, AlSiC, an aluminum alloy, a magnesium alloy, titanium, titanium alloy or steel, in particular special steel, stainless steel or tool steel. The glass material consists of the following in mole percent: 35-50% P2O5; 0-14% Al2O3; 2-10% B2O3; 0-30% Na2O; 0-20% M2O, with M being K, Cs or Rb; 0-35% Li2O; 0-20% BaO; and 0-10% Bi2O3, the glass material being free of lead except for contaminants.

Abstract: A vehicle installed battery pack is provided with a pressure release structure. The vehicle installed battery pack includes a battery pack case, a battery pack module. The battery pack case includes a battery pack lower frame and a battery pack upper cover. The battery pack module is disposed in the battery pack lower frame. The battery pack upper cover is securely joined to the battery pack lower frame via a seal member that extends continuously about an entire perimeter of respective outside peripheral edge portion of the battery pack upper cover. The battery pack upper cover includes a deforming stepped portion having a height difference at least in a heightwise direction; and a weakly joined portion having a lower joint strength than other joined portions being set in an area of the seal member extending continuously about the entire perimeter. The area corresponds to the deforming stepped portion.

Abstract: A battery unit includes the following elements: a battery module that includes a plurality of battery cells and a gas discharge opening for discharging gas jetted from each of the battery cells; and a gas discharge duct in communication with the gas discharge opening and discharging the gas to the outside of the battery module. The gas discharge duct includes at least one duct outlet of which cross-sectional area of the channel in the duct outlet or the sum of cross-sectional areas of the channel in the respective duct outlets is larger than a cross-sectional area of the channel on the upstream side in the flow direction of the gas. The gas discharge duct also includes a temperature reducing member that is fixed to the periphery of the duct outlet so as to block part of the channel and reduces the temperature of the gas going through gaps.

Abstract: In the present disclosure, disclosed are a frame for secondary batteries, which prevents gas from flowing into a cooling channel or a duct connected to it, when such gas is generated from secondary batteries; and a battery module comprising the same.

Abstract: A rechargeable battery including an electrode assembly including a positive electrode and a negative electrode, a case configured to encase the electrode assembly, a cap plate coupled to the case, a gasket between the case and cap plate and configured to insulate the case from the cap plate, and a heat-resistant member between an upper portion of the gasket and an outer surface of the cap plate and having a higher melting point than the gasket.

Abstract: A rectangular secondary battery includes a current breaking mechanism with improved rigidity against vibration and impact. The current breaking mechanism is interposed in the middle of a current path electrically connected between an external terminal and a wound electrode group to break the current path by the rise of battery internal pressure. The current breaking mechanism includes a connection electrode arranged inside a battery lid and electrically connected to the external terminal, and a conductive plate bonded to the connection electrode and deformed by the rise of the battery internal pressure. The connection electrode includes a tabular member having a through hole in communication with the outside of the battery opening on a planar portion. The conductive plate includes a dome-shaped diaphragm portion gradually reducing its diameter as shifting in an axial direction and a flange portion extending radially outward from an outer peripheral portion of the diaphragm portion.

Abstract: A rechargeable battery includes an electrode assembly for charging and discharging a current, a case having an opening in a direction intersecting a plane of the electrode assembly, and a cover for sealing the opening in the case which houses the electrode assembly therein, wherein the case further includes a vent integral with the case on one side of an extension direction of the plane of the electrode assembly, and a vent protective portion formed adjacent to the vent.

Abstract: A battery module including a plurality of battery cells arranged in one direction; heat insulating members interposed between the plurality of battery cells so as to control heat generated in the battery cells; and a housing fixing the battery cells and the heat insulating members.

Abstract: A method for producing a battery module having a plurality of individual electrochemical cells, includes the following steps: —arranging cell cans; —embedding the cell cans in a metal foam; and —inserting cell coils into the cell cans. The metal foam is used hereby as common negative pole or positive pole of the single cells.

Abstract: An electric storage device comprises the current interruption device which includes a deformable plate electrically connected to a first conductive member and a second conductive member to constitute part of a conductive path. The deformable plate deforms to interrupt the conductive path, when a pressure inside the casing rises. The first conductive member, the second conductive member, and the current interruption device are disposed between the terminal attachment wall and the electrode assembly. The first conductive member extends along the terminal attachment wall to connect the tab and the current interruption device. The second conductive member is connected to the current interruption device at a location that is farther from the terminal attachment wall than a connection between the first conductive member and the current interruption device, and extends along the terminal attachment wall to connect the current interruption device and the electrode terminal.

Abstract: A power battery system includes a number of parallel groups that being connected in series and a number of improved electrode boards. Each of the parallel groups comprising a number of single batteries connected in parallel. Each of the improved electrode boards being connected between two neighbored parallel groups. Each of the improved electrode boards includes a number of electrode contact plate, a conductive substrate, and a number of security devices. Each electrode contact plate connects two neighbored single batteries of two neighbored parallel groups in series. Each of the security devices corresponds to an electrode connection plate and electrically connects an electrode connection plate to the conductive substrate. Each of the security devices fuses when one of the single batteries of a parallel group occurs short circuit.

Abstract: A safety cap assembly of power battery comprises a cap plate and a first terminal unit, a second terminal unit, a vent, an electrolyte-injection hole and a safety reverse valve provided to the cap plate; the first terminal unit is electrically connected to the cap plate; the second terminal unit is insulated from and assembled to the cap plate; the safety reverse valve is electrically connected to the cap plate; a short circuit protection conducting plate is provided above the cap plate, is electrically connected to the second terminal unit, and is positioned above the safety reverse valve; the first terminal unit comprises a first terminal body, and a metal gasket and a resistance plate around the first terminal body, the resistance plate is provided below the metal gasket and comprises a substrate and a coating on a surface of the substrate.

Abstract: A rechargeable battery includes: an electrode assembly including a first electrode having a first polarity and a second electrode having a second polarity, the second polarity being different from the first polarity; a case housing the electrode assembly; a first terminal electrically connected to the first electrode; a cap plate coupled to an opening of the case; a first lower insulating member between the first electrode and the cap plate; and a first short-circuit member between the first terminal and the first lower insulating member, and configured to be deformed to electrically connect the first electrode to the cap plate, wherein the first terminal includes a first fixing portion electrically connected to the first electrode.

Abstract: Provided is a lithium ion battery including a battery can, a battery core received in the battery can, electrolyte filled in the battery can, and a battery cover assembled to the battery can. The battery can or the battery cover is provided with a pressure relief valve, and the pressure relief valve is coupled with a mesh cover defining a number of through holes therein. According to the present invention, when thermal runaway occurs to the lithium ion battery, the pressure relief valve breaks timely. Only gases and electrolyte vapor can pass through the mesh cover. Solid particles cannot pass through the mesh cover. Therefore, ignition of the flammable gases, the electrolyte vapor and the high temperature solid particles in the surrounding air afar from the pressure relief valve is avoided and the safety performance of the lithium ion battery can be improved remarkably.