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4-Traders Homepage  >  Equities  >  KOREA EXCHANGE  >  Samsung SDI Co Ltd    006400   KR7006400006

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Samsung SDI : Patent Issued for Electrode Assembly and Secondary Battery Having the Same (USPTO 9502733)

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12/01/2016 | 07:12pm CET

By a News Reporter-Staff News Editor at Electronics Newsweekly -- Samsung SDI Co., Ltd. (Giheung-gu, Yongin-si, Gyeonggi-do, KR) has been issued patent number 9502733, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Son, Suk-Jung (Suwon-si, KR); Kim, Chan-Jung (Suwon-si, KR); Jo, Yun-Kyung (Suwon-si, KR).

This patent was filed on February 25, 2009 and was published online on November 22, 2016.

From the background information supplied by the inventors, news correspondents obtained the following quote: "The present invention relates to a secondary battery, and more particularly, to a secondary battery having an electrode assembly which can prevent an internal short circuit.

"Various batteries are used as power sources for electric appliances, and particularly, lithium secondary batteries are widely used as power sources for compact electric appliances because they can realize high capacity with small volume, they have a high energy density per unit area, and they are rechargeable.

"Lithium secondary batteries are formed by accommodating an electrode assembly, which is formed by stacking and winding positive and negative electrode plates formed by applying active materials to positive and negative electrode collectors, respectively. A separator is disposed between both electrode plates, and an electrolyte is injected into a cell case and the cell case is sealed.

"Lithium secondary batteries may be classified into a cylindrical type, a rectangular type and a pouch type, depending on the shape of the cell case.

"Generally, to accommodate the electrode assembly in the cell case, the electrode assembly is wound, and then surrounded by tape to hold the electrode assembly is a wound state.

"That is, the tape laterally surrounds the electrode assembly which is formed by winding the positive electrode, the separator and the negative electrode to cover an end of the wound electrode assembly.

"In this respect, the completely wound electrode assembly is held by tape attached to the positive electrode plate, i.e., an outermost layer.

"Accordingly, when the separator formed of resin is contracted in a lateral direction of the electrode assembly, which is the vertical direction, due to charge or discharge of the battery, or thermal impact, the positive and negative electrode plates are in contact with each other in an empty space formed by the contraction of the separator, causing an electrical short circuit to occur.

"Particularly, the electrode assembly is severely exposed to heat and is heated at upper and lower parts so that the contraction of the separator can be easily generated at upper and lower parts of its end."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "The present invention provides an electrode assembly which can prevent contraction of a separator and a short circuit between a first electrode and a second electrode by attaching tape to upper and lower parts of an end of a wound separator, or by attaching tape to completely cover the end of the separator, and a secondary battery having the electrode assembly.

"According to an embodiment of the present invention, an electrode assembly includes an electrode group formed by stacking and winding a first electrode plate, a separator and a second electrode plate, and a tape is attached to upper and lower parts of an end of the electrode group. In the latter regard, an end of the separator is exposed outside, and the tape is attached to upper and lower parts of the end of the separator.

"According to another embodiment of the present invention, a secondary battery includes an electrode assembly which includes an electrode group formed by stacking and winding a first electrode plate, a separator and a second electrode plate, and a tape is attached to upper and lower parts of an end of the electrode group. In the latter regard, an end of the separator is exposed externally, and the tape is attached to upper and lower parts of the end of the separator.

"The upper and lower parts of the end of the separator may be fixed to an outermost electrode plate of the electrode group by the tape.

"The end of the separator may cover an end of the outermost electrode plate of the electrode group.

"The tape may be further attached to a part of the end of the electrode group other than the upper and lower parts thereof.

"The tape may laterally surround an outer surface of the electrode group, including the end of the electrode group, along a winding direction of the electrode group.

"The tape may be attached so as to completely cover the end of the electrode group.

"Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention."

For the URL and additional information on this patent, see: Son, Suk-Jung; Kim, Chan-Jung; Jo, Yun-Kyung. Electrode Assembly and Secondary Battery Having the Same. U.S. Patent Number 9502733, filed February 25, 2009, and published online on November 22, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9502733.PN.&OS=PN/9502733RS=PN/9502733

Keywords for this news article include: Electronic Equipment Companies.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2016, NewsRx LLC

(c) 2016 NewsRx LLC, source Technology Newsletters

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Financials ( KRW)
Sales 2016 5 287 B
EBIT 2016 -1 154 B
Net income 2016 289 B
Finance 2016 1 441 B
Yield 2016 1,17%
P/E ratio 2016 32,79
P/E ratio 2017 19,72
EV / Sales 2016 0,93x
EV / Sales 2017 0,90x
Capitalization 6 353 439 M
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Mean consensus OUTPERFORM
Number of Analysts 35
Average target price 120 321  KRW
Spread / Average Target 32%
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NameTitle
Nam-Sung Cho President, Chief Executive Officer & Director
Gwang-Il Kim Executive Director & Head-Production Technology
Min-Gee No Outside Director
Sung-Jae Kim Outside Director
Nan-Do Kim Outside Director
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