The present invention relates to a pouch-shaped battery case manufacturing method including (a) locating a laminate sheet for pouch-shaped battery cases on a lower press die, (b) pressing the laminate sheet using an upper press die to form an electrode assembly receiving portion, (c) forming a venting guide portion in the bottom of the electrode assembly receiving portion, and (d) separating a pouch-shaped battery case having the electrode assembly receiving portion and the venting guide portion formed therein from the lower press die.

A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

A clamping device for an electrochemical cell stack is provided. The clamping device can include a first plate and a second plate. The second plate can be positionable relative to the first plate such that a space between the first plate and the second plate can be sized to receive an electrochemical cell stack. The device also can include a coupling member coupling the first plate to the second plate. At least one of the first and second plates can be movable away from the other plate. The coupling member can have a first end portion and a second end portion. The device further can include an elastic member disposed between the first end portion and the second end portion.

A battery module for a motor vehicle has a battery module housing (30) with an insertion opening (32) and at least one battery cell package (40) is arranged in the battery module housing (30). The battery cell package (40) has at least two battery cells (42) arranged parallel to one another and at least one compression pad (44) arranged parallel to the battery cells (42). The battery cells (42) and the at least one compression pad (44) are stacked one on top of the other in any desired order in a thickness direction (D). The battery cell package (40) is inserted in an insertion direction (E) through the insertion opening (32) into the battery module housing (30). The battery cell package (40) also has two insertion auxiliary layers (46) that respectively form outer sides (41) of the battery cell package (40) that are opposite in the thickness direction (D).

A battery pack includes at least one cell assembly including a plurality of secondary batteries stacked in a direction, a module housing having an internal space in which the at least one cell assembly is received, and a spacer member interposed between the plurality of secondary batteries, and configured to press the plurality of secondary batteries in two directions to space the plurality of secondary batteries apart when a temperature of at least one of the plurality of secondary batteries is equal to or higher than a predetermined temperature.

A battery module capable of maintaining constant surface pressure of battery cells even if a swelling occurs in the battery cells accommodated in the battery module; a battery module system; and a battery pack including the battery module are provided.

Discussed is a pressing apparatus for pressing a plurality of battery cells, the pressing apparatus including a pressing jig including a support plate, and a plurality of pressing rods respectively disposed on a first side of the support plate and located to respectively face the plurality of battery cells, the plurality of pressing rods being configured to respectively press the plurality of battery cells and to adjust to sonic of the plurality of battery cells that are not level during pressing; and a transfer unit disposed on a second side of the support plate and having a transfer jig configured to transfer the support plate towards the plurality of battery cells.

A lithium (Li) secondary battery having a Li buffer layer compressed between a Li metal anode and an electrolyte of the battery cell and a porous structure positioned between the Li metal anode and a current collector of the battery cell. The Li buffer layer is effective in preventing uncontrollable dendrite growth. The porous structure layer is effective in guiding the location of the Li deposition, thereby reducing the volume changes of the Li anode during the charge and discharge cycles of the lithium secondary battery.

The battery pack has a laminated body in which unit cells are laminated one on another, a cell case having a first opening and containing the laminated body, and a first lid member to tightly close the first opening. The first opening is positioned to face, in connection with a unit cell laminated direction, a first face of the laminated body. The first lid member is configured to, if an internal pressure of the cell case is lower than atmospheric pressure, deform while keeping the tightly closing state, come into contact with the first face of the laminated body, and apply a pressure based on a differential pressure between atmospheric pressure and the internal pressure of the cell case to the contacting face.

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.