A method for manufacturing an electric vehicle battery case includes: preparing a frame configured to define a through space inside and a flat plate made of resin; superposing and disposing the flat plate on the frame; and applying pressure to the flat plate from an opposite side from the frame to press the flat plate against the frame to cause the flat plate to swell in the through space, thereby deforming the flat plate into a tray having a bathtub shape including a bottom wall and a peripheral wall provided at a peripheral edge of the bottom wall and configured to define an opening portion, and joining by press-fitting the tray to the frame.

An ultrasonic inspection system determines whether or not a thermally conductive resin forming a thermally conductive resin layer is filled through a waveform change of an ultrasonic wave measured by transmitting the ultrasonic wave toward a portion of an edge of a bottom surface of a module frame from the outside.

A component comprising a sheet-like reinforcing component having a first stiffness and a sheet-like attachment made of an attachment material having a second stiffness, wherein the first stiffness is higher than the second stiffness, wherein the planar reinforcing component has an upper and lower side and the attachment is connected at least to the upper or lower side of the planar reinforcing component in a first partial area of the planar reinforcing component.

Disclosed herein is an apparatus for folding a side extending outward from a cup part in a battery case of a pouch-type secondary battery. The apparatus can include a body having a plate shape, adjacent to the side, and disposed to be elongated in a longitudinal direction of the secondary battery, wherein the body includes, a heating part disposed at one side thereof to heat an inner portion disposed at a relatively inner side of the side, and a pressing part disposed at the other side thereof to press an outer portion disposed at a relatively outer side of the side. When the heating part heats the inner portion, the body rotates to allow the pressing part to press the outer portion.

A battery tray is provided and includes a first component and a second component. The first component includes a first set of walls, where the first set of walls includes a first stitched fabric, and where the first stitched fabric includes first metal coated fibers. The second component includes a second set of walls, where: the second set of walls includes a second stitched fabric; the second stitched fabric includes second metal coated fibers; and the second component is attached to the first component to form the battery tray, which is configured to hold a battery pack of a vehicle. The first metal coated fibers and the second metal coated fibers provide an electromagnetic shield surrounding the battery pack.

A disclosed sizing roller apparatus for a folding process of a battery cell includes: a table fixing and supporting a battery cell; a base plate disposed on a side of the table; a plurality of sizing rollers disposed on the base plate and each having a rotation axis, which is inclined inward toward a folding portion of the battery cell, to press the folding portion of the battery cell in contact with the folding portion; and a plurality of air spray nozzles disposed on the base plate and spraying air to the plurality of sizing rollers.

A pouch-type battery case includes a cup portion, which accommodates therein an electrode assembly formed by stacking an electrode and a separator, and a plurality of die edges connecting an outer wall of the cup portion to a side extending from the outer wall. The die edges include a first region, which is rounded at a first radius (r1) of curvature and at which an electrode tab extending from the electrode is positioned, and a second region which is other than the first region and rounded at one or more second radii (r2, r3, r4) of curvature less than or equal to the first radius (r1) of curvature. The second region is divided into an inner region and an outer region with respect to the first region, and the radius (r2) of curvature in the inner region differs from the radii (r3, r4) of curvature in the outer region.

The present invention relates to a pouch-shaped secondary battery sealing apparatus and a pouch-shaped secondary battery manufacturing method capable of radiating an infrared laser to a sealed portion in an overlapping state, whereby it is possible to increase sealing force, to prevent occurrence of wrinkles, and to reduce sealing time when forming a sealed portion of a pouch-shaped secondary battery case.

An apparatus for molding a pouch, the pouch having a first seating part and a second seating part, that are connected to each other, the pouch being configured such that when an electrode assembly is mounted and sealed therein, the first seating part and the second seating part are folded to cover top and bottom surfaces of the electrode assembly, and the first seating part and the second seating part are in contact with each other. The apparatus includes, a lower mold in which a first groove recessed by a predetermined depth from a top surface thereof is formed, and a second groove is additionally recessed from a bottom surface of the first grove; and an upper mold on which a flat portion is formed on one surface thereof, which is inserted into the first groove, and a protrusion inserted into the second groove protrudes from the flat portion.

Discussed is a battery pack case configured to receive a plurality of battery cells, the battery pack case including a first case and a second case coupled to each other through and engagement between first case and the second case. A projecting portion is on a coupling portion of the first case at a middle part of the first case in a thickness direction to project therefrom, a grooved portion is in a coupling portion of the second case at a middle part of the second case in a thickness direction thereof such that the projecting portion is inserted into the grooved portion, and a uniform gap between the outside of the projecting portion of the first case and the outside of the grooved portion of the second case in the state in which the first case and the second case are coupled and thermally fused to each other.