The present disclosure relates to a secondary battery electrode, a manufacturing method for the same, and an electrode assembly, and more particularly, to a secondary battery electrode, a manufacturing method for the same, and an electrode assembly having improved stability. In accordance with an exemplary embodiment, a secondary battery electrode includes a current collector that extends in one direction, a first active material layer provided on one surface of the current collector and including a first inclined portion and a first protruding portion, and a second active material layer provided on the other surface of the current collector and including a second inclined portion and a second protruding portion. In particular, a position of the second protruding portion is controlled on the second active material layer to be disposed at a position that is not directly opposite to the first inclined portion with respect to the current collector.

The present invention is a method for manufacturing a secondary battery. An electrode assembly and an electrolyte are accommodated into a body of a battery case. The body of the battery case has an accommodation part and a gas pocket part, and a passage that extends from the accommodation part to the outside discharges an internal gas from the accommodation part through the gas pocket part. The battery case is seated in a seating step on a support block, which has an inclined part on a side surface thereof, to support the battery case. The body is pressed to discharge a gas accommodated in the accommodation part through the gas pocket part in the battery case. This method allows easy discharging of internal gas while reducing discharge of the electrolyte with the gas.

Provided area an apparatus and a method for improving the foldability of a separator interposed between polar plates in prismatic secondary battery cell manufacturing equipment. Provided are an assembly and a method for improving the foldability of a separator, the assembly including a wheel knife capable of moving in a horizontal direction with respect to the supply direction of the separator on the prismatic secondary battery cell manufacturing equipment, wherein the wheel knife can rotate with respect to the center thereof, and, when the wheel knife moves on the separator, a recessed part is formed on the separator along the movement path thereof.

Disclosed is a method of manufacturing a pouch-shaped battery cell, the method including (a) forming an electrode assembly receiving portion in a laminate sheet to manufacture a preliminary battery case, (b) receiving an electrode assembly in the electrode assembly receiving portion and sealing other outer peripheries of the preliminary battery case excluding a first side outer periphery of the preliminary battery case, through which gas is discharged, (c) disposing a fixing jig at each of opposite end corner portions of a first side outer periphery of the electrode assembly receiving portion, (d) performing an activation process and a degassing process, (e) resealing the first side outer periphery of the electrode assembly receiving portion, and removing an end of the preliminary battery case, wherein step (d) to step (f) are performed in the state in which the corner portion is in tight contact with the inner surface of the fixing jig, which is technology capable of preventing the preliminary battery case from being deformed by force continuously applied to the preliminary battery case in a process of manufacturing the pouch-shaped battery cell.

An electrode assembly includes first and second electrode plate having opposite polarities, and a separator separating the first and second electrode plates. The first electrode plate includes two first stack sections and a bend section connecting the first stack sections and including a guide portion configured to guide the bend section to bend during production. The second electrode plate includes a second stack section disposed between the first stack sections. The separator includes two separation sections each disposed between the second stack section and one first stack section. Thickness Da of each first stack section, thickness Dc of the second stack section, and thickness Ds of each separation section in a stacking direction of the first stack sections, and a dimension w of the guide portion in a bending direction of the bend section satisfy: Dc+2Ds≤w≤2×(Dc+2Ds+Da).

A busbar holder with two busbar trays maintains positive and negative busbars separate and insulated from each other to reduce the chance of accidental short circuits. Cells are located in a frame onto which the busbar holder is mounted. One busbar is located in a bottom tray of the busbar holder. Legs of the busbar project down through holes in the bottom tray, for connection to one set of terminals of the cells. A top tray is placed over the bottom tray. Another busbar, in the top tray, is connected through holes in both trays to the other set of terminals of the cells. The busbar in the bottom tray is covered by the top tray. Holes through the busbar holder allow for hot gases to escape in the event of cell failure.

A positioning apparatus includes: an upper unit that includes a spherical body, a retainer part that retains the spherical body, and an upper plate part provided on the retainer part and adapted to carry a carried object; a lower unit that includes a lower plate part on which the upper unit is mounted and a guide part that marks a region of movement of the upper unit on the lower plate part; and a tilting structure that tilts the region of movement relative to a horizontal plane and guides the upper unit, on which the carried object is not mounted, toward a reference position located on a lower side of a tilt.

The present invention relates to a battery cell sealing device for sealing a pouch of a battery cell, more particularly, to a battery cell sealing device configured to be capable of simultaneously sealing a plurality of battery cells accommodated in one chamber to be able to increase production or processing capacity of the battery cells in one chamber and accordingly, decrease cost of an entire equipment.

The present application relates to a battery module including a first-type battery cell and a second-type battery cell at least connected in series, where the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, the first-type battery cell includes N first battery cell(s), and the second-type battery cell includes M second battery cell(s), where N and M are positive integers; and when a battery state of health (SOH) of a first battery cell is the same as an SOH of a second battery cell, and a state of charge (SOC) of the first battery cell is the same as an SOC of the second battery cell, a ratio of a total charge capacity of a first negative electrode sheet of the first battery cell to a total charge capacity of a second negative electrode sheet of the second battery cell is 0.8 to 1.2.

A method for manufacturing an electrode assembly includes a first combination step of combining a first electrode with an upper portion of a first separator to form a first combination, and a second combination step of combining the first combination so that a second electrode faces the first electrode with the first separator therebetween after the second electrode is stacked on a second separator, wherein the first combination step comprises a first electrode cutting process of moving the first electrode in an X-axis direction that is a progress direction to cut the first electrode to a predetermined size, a first electrode transfer process of transferring the cut first electrode, a first first-electrode position detection process of measuring a Y-axis position of the first electrode, a first separator meandering correction process of moving the first separator, a first stacking process of stacking the first electrode on the first separator.