Lg Chem, Ltd

Lg Energy Solution, Ltd.

Jeoung Soo Kim

Hyang Mok Lee

Sin Young Park

Sang Bong Nam

Hang Seob Yoon

Dong Sub Lee

Sang Jin Woo

Ki Woong Kim

Hyun Suk Kim

Tae Won Kang

In Gu An

Ki Eun Sung

Hyoung Sik Choi

Jun Ho Moon

Jun Hyeak Huh

Hyun Kyung Ko

Dong Hee Seo

The present technology relates to an electrode manufacturing method, an electrode manufactured by the method, and a secondary battery comprising same, the electrode manufacturing method comprising a cleaning step performed by laser irradiation, in lines corresponding to each other in a direction perpendicular to an electrode current collector, onto a top-coated electrode mixture layer and a back-coated electrode mixture layer of the electrode current collector, and may prevent a mismatch of the electrode mixture layers and may significantly reduce the degree of sliding occurrence at the boundary region.

Electrode manufacturing method comprising cleaning step using laser, electrode manufactured by method, and secondary battery comprising same

A method for injecting an electrolyte includes heating a case in which an electrode assembly is accommodated, and injecting an electrolyte into the case after the heating of the case. Here, the heating of the case may include heating the case through high-frequency induction heating using a coil. Also, the coil may have a spiral shape to surround the outside of the case along a longitudinal direction of the case.

Method for injecting electrolyte

The present invention relates to a secondary battery structure. The secondary battery structure includes: a can; an electrode assembly accommodated in the can, the electrode assembly including a cathode tab and an anode tab; a cap plate sealing an opened upper end of the can; and an upper insulator disposed between the can and the cap plate, the upper insulator having a cathode tab hole for the cathode tab, an anode tab hole for the anode tab, and an injection/impregnation hole for injecting and impregnating, wherein each of the cathode tab hole, the anode tab hole, and the injection/impregnation hole extends in a length or width direction of the upper insulator and is symmetrical with respect to at least one of a line (a) that equally divides the upper insulator in a width direction and a line (b) that equally divides the upper insulator in a length direction.

Secondary battery structure

Provided are a secondary battery case and a method for manufacturing a secondary battery. The secondary battery case includes a can accommodating an electrode assembly and a top cap sealing an upper opening of the can. The top cap includes a top plate sealing the upper opening of the can, a filling hole passing through the top plate to fill an electrolyte into the can, and a protrusion protruding from the top plate on an upper portion of the filling hole. The protrusion is press-fitted into the filling hole to seal the filling hole. According to the present invention, the protrusion may protrude from the top plate. Thus, the protrusion may be press-fitted into the filling hole and thus broken to seal the filling hole. Therefore, the member for sealing the filling hole may be integrated with the top plate to reduce manufacturing costs and simplify a manufacturing process.

Secondary battery case and method for manufacturing secondary battery

Growing community of inventors

Daejeon, South Korea

Jeoung Soo Kim