Samsung Sdi Co., Inc.

Se-jong Han

Yong-beom Lee

Yun-seok Choi

Ki-ho Kim

Jin-soo Lee

Jea-Woan Lee

Hyung-gon Noh

Byoung-Hyun Kang

Duck-chul Hwang

In-sung Lee

A lithium secondary battery having a winding-type electrode assembly and a case accommodating the electrode assembly, and a method of manufacturing thereof. In the lithium secondary battery, ion-conductive polymer is contained in at least one of a hollow portion of the electrode assembly and an inner space of the case other than the hollow portion. The hollow portion and/or the inner space of the case of the electrode assembly is filled with ion-conductive polymer which can consume the heat generated in the battery and which is changed into a gel-state by an electrolytic solution, to dissipate the heat generated in the battery. Accordingly, the explosion of the battery can be suppressed, thereby preventing the reliability and safety of the battery from lowering.

Lithium secondary battery and method of manufacturing thereof

A lithium secondary battery has an electrode assembly including a positive electrode plate having a positive electrode current collector and a positive electrode sheet fixed to at least one surface of the positive electrode current collector and having a positive electrode active material as a main component, a negative electrode plate having a negative electrode current collector and a negative electrode sheet fixed to at least one surface of the negative electrode current collector and having a negative electrode active material as a main component, and a separator interposed between the positive electrode plate and the negative electrode plate. A current controller for cutting off current at a minimum temperature is present on each of the positive and negative electrode plates.

Lithium battery incorporating protective positive temperature coefficient material

A lithium secondary battery and a method of manufacturing the battery. In the lithium secondary battery including a positive electrode plate having a positive electrode current collector and a positive electrode sheet having a positive electrode active material fixed to at least one surface of the positive electrode current collector, a negative electrode plate having a negative electrode current collector and a negative electrode sheet having a negative electrode active material fixed to at least one surface of the negative electrode current collector, a separator is interposed between the positive electrode plate and the negative electrode plate, and a coating of a polymer material having a high elongation ratio is present on at least each one outer surface of the positive and negative electrode plates to improve battery safety.

Lithium secondary battery and manufacturing method thereof

A cylindrical secondary battery includes a case, a cathode plate and an anode plate installed in the case, and a separator interposed therebetween, a cap on the case and a cap cover coupled to the cap and having a vent hole, and a one-way valve installed in the vent hole. The one-way valve includes a hollow body portion inserted in the vent hole of the cap cover, gas passing grooves at the outer circumferential surface of the hollow body, an upper flange at the outer circumferential surface of the hollow body, disposed above the cap cover, a lower flange at the outer circumferential surface of the hollow body, disposed under the cap cover, a spring elastically supported between the upper flange and the cap cover, and a fragile portion closing an upper portion of the hollow body. Thus, gas generated during initial charging of the battery can be exhausted by a user through the one-way valve and the one-way valve can also be used as a device for preventing explosion due to the gas generated while using the battery.

Growing community of inventors

Cheonan, South Korea

Se-jong Han