Lg Chem, Ltd

Lg Energy Solution, Ltd.

Tai-Jin Jung

Jeong-O Mun

Dal-Mo Kang

Eun-Gyu Shin

Cha-Hun Ku

Hang-June Choi

Byoung-Cheon Jeong

Jung Kwan Pyo

Kun Ha Park

A pouch exterior material that enables an electrode assembly to be easily mounted on an accommodating portion at a proper position, having an integrated shape and including an inserting portion provided at a center of the pouch exterior material and having a width equal to a thickness of the electrode assembly, accommodating portions provided symmetrically at two sides of the inserting portion and gradually deepening from a portion corresponding to a width center of the electrode assembly towards a portion corresponding to an edge of the electrode assembly, and a triangular stepped portion provided at two ends of the inserting portion and having a depth gradually decreasing towards an end.

Pouch exterior material for secondary battery, pouch type secondary battery using the same, and method of manufacturing the same

Disclosed are a pouch exterior capable of easily mounting an electrode assembly at an accurate position between accommodating parts, having an integrated form to minimize sealing parts contacting the air and to increase a lifetime of a battery, capable of preventing a rupture of the pouch exterior in an assembly process, and capable of increasing an energy density of a cell, a pouch-type secondary battery using the pouch exterior, and a method of manufacturing the pouch-type secondary battery. A pouch exterior for a secondary battery, according to the present disclosure, includes two corresponding accommodating parts configured to mount an electrode assembly therebetween and symmetrically formed at both sides by disposing a protruding part therebetween, and is folded along two folding lines outside a center pan of the protruding part by vertically mounting a side surface of the electrode assembly on the protruding part, such that folded parts surround side edges of the electrode assembly.

Pouch exterior for secondary battery, pouch-type secondary battery using the pouch exterior, and method of manufacturing the pouch-type secondary battery

Provided is a battery module in which a connection structure between electrode leads is changed to prevent a heat generation phenomenon when overcharged and to allow easy connection and disconnection between secondary batteries, and a method for manufacturing the same. The battery module according to the present disclosure includes a secondary battery stack formed by stacking a plurality of secondary batteries having electrode leads, wherein each electrode lead protrudes from the corresponding secondary battery, and each electrode lead has a bent part, and the bent parts of opposite-polarity electrode leads of neighboring secondary batteries are stacked with an elastic body interposed therebetween, and the corresponding stacked part is fastened by an insulating bolt including a washer, with the elastic body being compressed.

Battery module with improved connection structure between electrode leads and method for manufacturing the same

A pouch case sealing apparatus for sealing a pouch case that includes a pouch body for accommodating an electrode assembly of a battery cell and a pouch terrace extending from the pouch body is provided. The pouch case sealing apparatus includes: a pair of sealing jigs, each sealing jig having a pressing surface, the pair of sealing jigs being configured to press and thermally fuse the pouch terrace from upper and lower directions of the pouch terrace so that the pouch case is sealed; and a pair of terrace anti-protruding units formed at respective pressing surfaces of the pair of sealing jigs to prevent an end portion of the pouch terrace from protruding beyond the pouch body in a horizontal direction of the pouch body when the pouch terrace is pressed and thermally fused. A method for sealing a pouch case is also provided.

Apparatus for sealing pouch case

A jig assembly for laser welding includes a jig body having a first penetration portion through which laser light for welding is capable of passing; a contact member connected to the jig body to contact a welding target, the contact member having a second penetration portion through which the laser light passing through the first penetration portion is capable of passing toward the welding target; a tilting unit having a hinge structure to connect the jig body and the contact member to each other; and an elastic member interposed between the jig body and the contact member to apply an elastic force to provide close contact between the contact member and the welding target.

Jig assembly for laser welding

A battery module housing having a rectangular tube structure and method for forming the battery module housing is provided. The battery module housing includes a first side plate and a second side plate, the first and second side plates having target portions at upper and lower ends thereof, respectively, and spacers vertically protruding from the target portions; and a top plate and a bottom plate disposed upper and lower portions of the first and second side plates, respectively, each of the top and bottom plates having flyer portions supported on the spacers of the first and second side plates. The flyer portions of the top and bottom plates are joined to the target portions by means of electromagnetic pulse welding such that outer portions of the flyer portions contact the target portions and inner portions of the flyer portions are separated from the target portions by a gap.

Battery module housing to which electromagnetic pulse bonding technology is applied and method for manufacturing same

Disclosed are a pouch exterior capable of easily mounting an electrode assembly at an accurate position between accommodating parts, having an integrated form to minimize sealing parts contacting the air and to increase a lifetime of a battery, capable of preventing a rupture of the pouch exterior in an assembly process, and capable of increasing an energy density of a cell, a pouch-type secondary battery using the pouch exterior, and a method of manufacturing the pouch-type secondary battery. A pouch exterior for a secondary battery, according to the present disclosure, includes two corresponding accommodating parts configured to mount an electrode assembly therebetween and symmetrically formed at both sides by disposing a protruding part therebetween, and is folded along two folding lines outside a center part of the protruding part by vertically mounting a side surface of the electrode assembly on the protruding part, such that folded parts surround side edges of the electrode assembly.

Growing community of inventors

Daejeon, South Korea

Tai-Jin Jung