Samsung Sdi Co., Inc.

Soomi Eo

Jeawoan Lee

Seunghee Park

Kyung Kon Kim

Euysun Jung

Youngchang Lim

Kwonchul Kim

Kyunghoon Cho

Jaemin Lim

Yongbeom Lee

Chan Hong

Kwangjo Cheong

Jaemin Im

A secondary battery is disclosed. In one aspect, the secondary battery includes an electrode assembly, a case accommodating the electrode assembly and a lead member extending from the electrode assembly to outside of the case. The secondary battery also includes an insulation member at least partially covering the lead member, the insulation member having an exterior portion that is located outside the case and an interior portion that is located inside the case, wherein the interior portion has a first thickness, and wherein at least part of the exterior portion has a second thickness less than the first thickness. The secondary battery may have a compact structure, and insulation characteristics of the secondary battery may be improved.

Secondary battery including insulation member having multiple thicknesses

A secondary battery includes: a wound electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; a pouch accommodating the electrode assembly; and; an adhesive tape on an outer surface of the electrode assembly. The adhesive having adhesiveness through reaction with an electrolyte.

Secondary battery

A secondary battery is disclosed. In one aspect, the secondary battery includes an electrode assembly and a case comprising an accommodation region configured to accommodate the electrode assembly. The accommodation region has a first width in a center area thereof and a second width in opposing ends thereof, and wherein the second width is greater than the first width. When the case configured to accommodate the electrode assembly is formed, formation errors caused by concentration of stress such as tearing of a raw material or thickness deviations may be prevented.

A secondary battery includes: an electrode assembly, a case accommodating the electrode assembly, and an electrode tab electrically connected to the electrode assembly and extending from inside of the electrode assembly to outside of the case. The electrode tab has different thicknesses at the inside of the electrode assembly and the outside of the electrode assembly.

A rechargeable battery includes an electrode assembly, a pouch accommodating the electrode assembly, a first electrode tab electrically connected to the electrode assembly, the first electrode tab including a protruding portion that protrudes outwardly from a first surface of the electrode assembly so as to be exposed to the outside of the pouch and a parallel portion that extends along the first surface of the electrode assembly, and a fixing tape that attaches and fixes the first electrode tab to the first surface of the electrode assembly. The fixing tape adheres to cover the parallel portion of the first electrode tab bent along the first surface of the electrode assembly and the first surface of the electrode assembly.

Rechargeable battery

A polymer electrolyte having improved reliability and safety by increasing thermal stability of a polymer of the polymer electrolyte and crosslinking density of a matrix of the polymer while improving electrode impregnation capability by inducing low viscosity in a pre-gel composition, and a lithium rechargeable battery including the same are disclosed. The polymer electrolyte is a cured product of a polymer electrolyte composition including a lithium salt, a non-aqueous organic solvent, and a pre-gel composition including a first monomer represented by Chemical Formula 1, a second monomer represented by Chemical Formula 2 and a third monomer represented by Chemical Formula 3.

Polymer electrolyte and lithium rechargeable battery including the same

A composite separator and a lithium secondary battery including the composite separator, and the composite separator includes a separator; a first coating layer disposed on a surface of the separator and including a (meth)acrylic polymer and/or (meth)acrylic modified polyester resin; and a second coating layer disposed on another surface of the separator and including a vinylidene fluoride-based polymer.

Growing community of inventors

Yongin-si, South Korea

Soomi Eo