Lithium ion rechargeable battery
A lithium ion secondary battery in which an electrode assembly is easily impregnated with an electrolyte is provided. The lithium ion secondary battery includes an electrode assembly wrapped by a sealing tape, an upper insulating plate positioned on the top of the electrode assembly, a lower insulating plate positioned at the bottom of the electrode assembly, a case for accommodating the electrode assembly, and a cap assembly for sealing the case. In one embodiment, the upper insulating plate has holes which may include a form of a mesh. In another embodiment, the lower insulating plate has various shapes of recesses on the surface. The surface of the lower insulating plate may be coated with a material that has an affinity for the electrolyte. An inner surface of the case may have various shapes of recesses or grooves. The sealing tape may be coated with a material that has an affinity for an electrolyte. Therefore, according to the principles of the present invention, the electrode assembly is easily impregnated with the electrolyte, and overall performance of the lithium ion secondary battery is improved.
Samsung SDI Co., Ltd.
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Jung-Seog Yong-Tae Yoo-Eup Sang-Bong Seok-Gyun
Kim Kim Hyung Nam Chang