Abstract: The present invention relates to a battery cell including an electrode assembly including a plurality of electrode plates and at least one separator interposed between the plurality of electrode plates, a case configured to receive the electrode assembly, electrode tabs formed at the electrode plates so as to protrude and extend therefrom, and an electrode lead joined to the electrode tabs while being electrically connected to the outside, wherein each of the electrode tabs includes a first tab portion connected to a corresponding one of the electrode plates and a second tab portion extending from the first tab portion, the electrode lead being joined to the second tab portion, and the first tab portion is provided with a stress relief portion configured to reduce stress in the electrode tab.

Abstract: A battery pack includes a battery cell and a bus bar electrically connected to the battery cell, wherein the bus bar includes a rupture portion configured to melt due to electric resistance heat generated by overcurrent and thus to rupture, the rupture portion having a plurality of through-holes therein.

Abstract: Discussed is a battery module including a plurality of pouch-type secondary batteries arranged in parallel to each other, each pouch type secondary battery comprising an electrode assembly, a receiving portion configured to receive the electrode assembly and a pouch exterior, a cooling plate arranged under the plurality of pouch-type secondary batteries to accommodate the plurality of pouch-type secondary batteries, and a thermally conductive adhesive between the plurality of pouch-type secondary batteries and the cooling plate. The cooling plate includes a first recess to receive a portion of the pouch exterior and a second recess to receive a portion of the thermally conductive adhesive.

Abstract: A battery module housing includes a top plate and a bottom plate forming an upper wall and a lower wall, respectively, and a first side plate and a second side plate forming side walls, respectively, the battery module housing having a rectangular tube shape provided to accommodate battery cells in an inner space thereof, wherein the battery module housing has four bonding portions each including an adhesive along a longitudinal direction, the bonding portions located at two sites between opposing side edges of the top plate and top surfaces of the first side plate and second side plate, respectively, and at two sites between opposing side edges of the bottom plate and bottom surfaces of the first side plate and second side plate, respectively.

Abstract: A battery module includes a heat-shrinkable tube serving as a module housing. The battery module includes a cell assembly having a plurality of pouch-type secondary batteries; a bus bar assembly having a bus bar frame and a bus bar mounted to an outer surface of the bus bar frame; and a heat-shrinkable tube formed to be shrunk by heat and configured so that the cell assembly is located therein, the heat-shrinkable tube being provided to surround a side surface of the cell assembly and a portion of the bus bar assembly.

Abstract: Disclosed herein are a pouch type secondary battery and a method for manufacturing the same. A pouch type secondary battery may include an electrode assembly having a first width and a pouch type exterior in which a recess part configured to accommodate the electrode assembly is formed. The recess part may include a main recess part and a sub recess part. The main recess part may have a space defining a second width that is equal to or greater than the first width. The sub recess part may communicate with the main recess part and define a space having a third width less than the first width.

Abstract: A battery module includes: a battery cell assembly having a plurality of battery cells; a top plate configured to cover an upper side of the battery cell assembly; a bottom plate configured to cover a lower side of the battery cell assembly; a sensing assembly disposed to cover a front side and a rear side of the battery cell assembly; a pair of side plates disposed at side surfaces, respectively, of the battery cell assembly; and a pair of compression pads disposed between the pair of side plates and the battery cell assembly, respectively.

Abstract: A battery module includes at least one battery cell assembly having at least one battery cell; a module case configured to accommodate the at least one battery cell assembly; and an exhaust housing coupled to the module case to cover the at least one battery cell assembly, the exhaust housing having at least one gas discharge hole for discharging a gas inside the module case and at least one flame leak prevention partition for variably adjusting a length thereof.

Abstract: A pouch-type secondary battery includes an electrode assembly having a structure in which electrodes and separators are alternately disposed; and a pouch-type exterior configured to accommodate the electrode assembly, wherein the exterior includes an accommodation part defining a space accommodating the electrode assembly; and a sealing part disposed along a circumference of the accommodation part in which some areas of the exterior are attached to each other so that the accommodation part is sealed from an outside, wherein a plurality of corners are disposed on the sealing part, at least one corner of the plurality of corners includes a recess part recessed toward the electrode assembly; and a diagonal part disposed adjacent to the recess part and extending toward the recess part in a diagonal direction crossing a longitudinal direction of the exterior.

Abstract: A battery rack effectively prevents the spread of a fire or heat to adjacent battery packs when the fire or thermal runaway occurs in any of a plurality of battery packs. To achieve the above-described object, the battery rack includes a plurality of battery packs; and a rack case having a receiving space with an open structure in which the plurality of battery packs is vertically mounted at intervals and placed in vertical communication with one another, wherein a stopper is provided in the receiving space and disposed between the plurality of battery packs, spaced apart from the plurality of battery packs, and is configured to suppress volume expansion of the battery pack when the volume of the battery pack expands.

Abstract: A cell assembly includes a first sleeve. The first sleeve includes a first side, a second side facing the first side, and a third side connecting the first side and the second side. The sleeve also includes a first open end between the first side and the second side, a second open end between the first side and the second side, and opposite the first open end, and a third open end between the first open end and the second open end and opposite the third side. The cell assembly includes a first pouch-type cell between the first side and the second side of the first sleeve. A first surface of the first pouch-type cell is adjacent to the third open end. A second surface of the first pouch-type cell is opposite the first surface, and spaced apart from the third side of the first sleeve by a predetermined distance.

Abstract: An electrode includes an active material coating portion coated with an electrode active material on at least one surface of an electrode collector; and an active material non-coating portion which is at one side of the active material coating portion, is not coated with the electrode active material, and includes at least one slit extending from one end to the another end thereof, wherein in each slit of the at least one slit, a hole is passes through a point at which the respective slit and the active material coating portion meet each other.

Abstract: An interconnect board (ICB) assembly suitable for a battery module of horizontal stack structure including unidirectional battery cells stacked with cell leads facing each other includes an ICB frame in which cell leads of unidirectional battery cells are configured to be received such that the unidirectional battery cells having the cell leads at one end are configured to be placed facing each other with the cell leads facing each other, and busbars formed in the ICB frame and configured to be electrically connected to the cell leads, wherein the ICB frame is configured to be connected to another ICB frame with a hinge structure in a lengthwise direction of the ICB frame. A battery module including the ICB assembly and a method for fabricating the battery module are also provided.

Abstract: An apparatus for predicting a degree of deformation of a battery module, caused by swelling of a secondary battery. The battery module includes at least one secondary battery in a module case. The apparatus includes a cell evaluation module configured to derive a relationship between a thickness change amount and a reaction force for a single secondary battery; a case evaluation module configured to derive a relationship between a load applied to the module case and a width change amount of the module case; and a prediction module configured to predict a deformation amount of the battery module by using the relationship between the thickness change amount and the reaction force of the secondary battery, derived by the cell evaluation module, and the relationship between the load and the width change amount of the module case, derived by the case evaluation module.

Abstract: Discussed is a battery module including a plurality of pouch-type secondary batteries, each including an electrode assembly, an electrolyte, and a pouch exterior and arranged in a left-and-right direction while standing in an up-and-down direction and a cooling plate including a thermally conductive material, arranged under the plurality of pouch-type secondary batteries while lying in a horizontal direction, and having an upper surface to which lower portions of the secondary batteries are attached and fixed, wherein the lower portions of the secondary batteries are attached and fixed to the upper surface of the cooling plate via an adhesive, and the cooling plate includes an accommodation groove recessed downwards in portions of the cooling plate, to which the lower portions of the secondary batteries are attached, and configured to accommodate at least a portion of the adhesive.

Abstract: Provided is a laser welding apparatus configured to weld an electrode lead of at least one secondary battery of a battery module and a main bus bar configured to electrically connect a plurality of secondary batteries to each other. The laser welding apparatus includes: a laser beam emitting unit including a laser emitting element to irradiate a laser beam to the electrode lead and the main bus bar; a pressing jig including a pressing bar configured to move in a left-and-right direction such that the electrode lead is adhered to the main bus bar; and a blocking block movable to block the laser beam generated in the laser beam emitting unit from reaching the at least one secondary battery or movable to allow the generated laser beam to pass therethrough, according to a position of the pressing bar moved in the left-and-right direction.

Abstract: Discussed is a battery pack provided in a vehicle, the battery pack including a pack tray mounted on the vehicle; and at least one battery module provided on the pack tray, wherein the at least one battery module includes: at least one battery cell assembly mounted on the pack tray, and including at least one battery cell; and a plurality of side plates provided on opposite side surfaces of the at least one battery cell assembly to support the at least one battery cell assembly, the plurality of side plates being fixed to the pack tray, and wherein each of the plurality of side plates includes: a support portion supporting the at least one battery cell assembly; and a fixed portion extending from the support portion, and fixed to the pack tray.

Abstract: A battery pack includes a pack case having a predetermined accommodation space, a plurality of battery modules accommodated in the pack case and having a plurality of battery cells stacked on each other, at least one partition isolation member disposed to compart the plurality of battery modules in a direction parallel to a stacking direction of the plurality of battery cells, a plurality of bus bar members configured to electrically connect the plurality of battery modules, a plurality of relay units connected to the plurality of bus bar members, and an outer resistor unit connected to the plurality of relay units and provided at one inner side of the pack case.

Abstract: A battery module includes: a battery cell assembly having a plurality of battery cells; a top plate configured to cover an upper side of the battery cell assembly; a bottom plate configured to cover a lower side of the battery cell assembly; a sensing assembly disposed to cover a front side and a rear side of the battery cell assembly; a pair of side plates disposed at side surfaces, respectively, of the battery cell assembly; and a pair of compression pads disposed between the pair of side plates and the battery cell assembly, respectively.

Abstract: A forced discharge test apparatus includes a heating circuit; a discharge circuit; a temperature sensor; and a controller. When the controller receives a test command indicating a test resistance and a test temperature, the controller outputs a first control signal to the heating circuit to increase the temperature of a battery cell. The controller outputs a second control signal to the discharge circuit to discharge the battery cell when the temperature of the battery cell reaches the set test temperature. The controller determines that the test temperature is valid with respect to the test resistance when the temperature of the battery cell is equal to or lower than the upper temperature limit at a time point at which a predetermined heating time has passed from a time point when the first control signal is outputted.