Lg Chem, Ltd

Lg Energy Solution, Ltd.

Nan Ji Yun

So Yeon Kim

Seung Don Choi

Yo Jin Kim

Dal Mo Kang

Min Chul Jang

In Cheol Shin

Dae Sik Choi

Hey Woong Park

Sung Joon Park

You Rim Yoon

Sang Yoon Jeong

Seung Su Cho

Yong Kyu Ju

Ho Jin Jeon

Jin Seo Park

Seung-Taek Hong

Chang Moon Jeong

Jun Seok Choi

Seung Taek Hong

Soul Gie Hong

Chang Ho Kim

Sae Young Oh

Seung Hee Yang

Hyun Jung Na

Hui Kyoung Kim

Min Won Suh

A pouch type battery case includes: a first cup part and a second cup part, which are recessed with respect to a sealing part; and a bridge formed between the first cup part and the second cup part and having a constant width and height, wherein the first cup part includes: a first outer wall formed opposite the bridge; a second outer wall formed adjacent the bridge; and a first bottom portion connecting the first outer wall to the second outer wall, and the second cup part includes: a third outer wall formed adjacent the bridge; a fourth outer wall formed opposite the bridge; and a second bottom portion connecting the third outer wall to the fourth outer wall, wherein the fourth outer wall has a height greater than that of the first outer wall.

Pouch type battery case and pouch type secondary battery

Provided are a secondary battery, a battery module, and a battery pack, which have improved safety. Particularly, since a bulletproof material is disposed on the inside and/or the outside of an exterior part, even when a conductive needle-shaped member penetrates a secondary battery, heating, burning, discharge of evaporated electrolyte, and electrical contact between the needle-shaped member and an electrode can be prevented, thereby improving safety of the secondary battery, the battery module, and the battery pack.

Secondary battery having improved safety

Provided is a positive electrode active material. The positive electrode active material includes: a small-diameter active material having an average particle diameter of about 0.5 &#x3bc;m and a maximum particle diameter of less than about 1 &#x3bc;m; and a large-diameter active material having an average particle diameter of about 5 &#x3bc;m to about 20 &#x3bc;m and a maximum particle diameter of less than about 100 &#x3bc;m.

Positive electrode active material, and positive electrode and lithium secondary battery including the same

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Daejeon, South Korea

Nan Ji Yun