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Samsung SDI : Patent Issued for Lithium Polymer Battery

07/01/2015 | 05:34pm US/Eastern

By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Jang, Youngcheol (Yongin-si, KR); Kwak, Eunok (Yongin-si, KR), filed on May 5, 2009, was published online on June 23, 2015.

The assignee for this patent, patent number 9065083, is SAMSUNG SDI CO., LTD. (Suwon-Si, Gyeonggi-do, KR).

Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to a lithium polymer battery, and more particularly, to a lithium polymer battery that can improve reliability, safety and mechanical assembling workability of an electrical coupling structure between a bare cell and a protection circuit module.

"Generally, a lithium polymer battery includes, in one implementation, an electrode assembly, a pouch type outer case receiving the electrode assembly and a core pack formed of a protection circuit module that is provided at one side of the outer case so as to be electrically coupled to the electrode assembly.

"The electrode assembly is formed by interposing a separator between first and second electrode plates and winding them together in a jelly-roll type. Electrode tabs are respectively attached to the first and second electrode plates and withdrawn out of the front of the outer case by a predetermined length.

"The outer case, in one implementation, is a flexible pouch type and both sides and front thereof are thermally bonded. When the outer case is thermally bonded, remaining parts of a predetermined length are formed to protect the electrode assembly contained in the outer case. Accordingly, the remaining parts formed at both sides of the outer case are folded to surround the electrode assembly, thereby reducing a width of the battery. Then, the protection circuit module is placed on the remaining part formed on the front of the outer case.

"However, in the conventional lithium polymer battery, a process of bending the electrode tabs is unavoidably performed while the protection circuit module is mechanically and electrically coupled to the electrode tabs withdrawn out of the front of the outer case.

"For example, the electrode tabs may be bent to weld the connection terminal of the protection circuit module and electrode tabs at the same welding point. Or, when the connection terminal of the protection circuit module and electrode tabs are welded without bending the electrode tabs, the electrode tabs should be bent after welding. That is the reason that the process of bending the electrode tab should be performed to expose the external terminal of the protection circuit module.

"As described above, the complicated process of bending the electrode tab has been unavoidably performed at least once while the outer case and protection circuit module are assembled.

"Accordingly, the conventional lithium polymer battery has a problem that wire disconnection occurs at the bent part of the electrode tab and the reliability and safety of the battery are degraded.

"In addition, assembling workability is lowered because of the complicated process to bend the electrode tab."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "Accordingly, an object of the present invention is to provide a lithium polymer battery that can improve reliability and safety of the battery by electrically coupling an electrode tab to a protection circuit module with reduced bending of the electrode tab.

"According to another object of the present invention, there is to provide a lithium polymer battery that can improve assembling work by electrically coupling an electrode tab to a protection circuit module with reduced bending of the electrode tab.

"Additional advantages, objects and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

"According to an aspect of the present invention, there is provided a lithium polymer battery, which includes: an electrode assembly; an outer case receiving the electrode assembly, where an electrode tab of the electrode assembly is withdrawn out of the outer case; a protection circuit module provided at one side of the outer case, where an inner connection terminal of the protection circuit module is connected to the electrode tab of the electrode assembly and provided in parallel to the withdrawn direction of the electrode tab.

"The electrode assembly may be formed by interposing a separator between first and second electrode plates and winding them together in a jelly-roll type. Electrode tabs may be respectively attached to the first and second electrode plates.

"The outer case may include a first region for receiving the electrode assembly and a second region combined to an open part of the first region, where right and left sides and the fronts of the first and second regions are thermally bonded so as to form side remaining parts and front remaining parts.

"The electrode tab may be vertically withdrawn out through the front remaining part of the outer case and the protection circuit module may be provided at the front remaining part of the outer case.

"The protection circuit module may include a circuit board provided with the inner and outer connection terminals, where the inner connection terminal is electrically and mechanically connected to the electrode tab and the outer connection terminal transmits current to the outside by being electrically coupled to the inner connection terminal.

"The inner and outer connection terminals may be respectively provided at different surfaces of the circuit board.

"In this time, the outer connection terminal may be provided on the front surface of the circuit board and the inner connection terminal may be provided on a long side surface adjacent to the front surface.

"The protection circuit module may include the circuit board and a terminal housing separated from the circuit board and the inner connection terminal may be provided on the circuit board and the outer connection terminal electrically coupled to the inner connection terminal may be provided at the terminal housing.

"The circuit board may be provided at the front remaining part of the outer case in a stood-up state and the terminal housing may be provided at the long side surface of the circuit board.

"The inner connection terminal may be provided at the front surface of the circuit board.

"In yet another aspect, the invention may comprise a battery assembly comprising an electrode assembly comprising a first electrode and a second electrode with a separator interposed therebetween. The electrode assembly has a first and a second lateral side and the electrode assembly further includes at least one electrode tab that is coupled to at least one of the first and second electrodes at a first lateral side of the electrode assembly so as to extend outward therefrom in a first direction.

"The battery assembly further comprises a casing that defines a first recess with an opening, wherein the recess is sized so as to receive the electrode assembly so that the at least one electrode tab extends outward from the opening in the first direction. The casing further includes a cover that covers the opening so as to secure the electrode assembly within the first recess with the at least one electrode tab extending between the cover and the casing. The casing defines a mounting location located on a first surface of the casing that is located in the first direction from the first recess.

"The battery assembly further comprises a protection circuit module that is mounted on the mounting location on the casing. The protection circuit module includes at least one terminal that is positioned to be substantially aligned with the at least one electrode tab of the electrode assembly so that the at least one electrode tab of the electrode assembly is positioned proximate to the at least one terminal of the protection circuit module to permit interconnection thereof.

"In yet another aspect, the battery assembly casing includes flanged surfaces that extend around the opening to the first recess. The cover is pivotally attached to a first side of the opening of the casing so that the cover closes about the opening with the at least one electrode tab being interposed between the cover and a flanged surface that is located in a first direction from the opening to the first recess.

"In yet another aspect, the recess in the casing extends in a second direction, perpendicular to the first direction, a distance sufficient to accommodate the width of the electrode assembly such that the at least one electrode tab is positioned outside of the first recess adjacent the flanged surface that is located in a first direction from the opening in the first recess.

"In yet another aspect, the at least one terminal of the protection circuit module is mounted on a first surface of the protection circuit module and the protection circuit module is mounted on the first surface of the casing at the mounting location so that the at least one terminal of the protection circuit module is positioned in substantially the same plane as the at least one electrode tab so that the at least one electrode tab of the electrode assembly can be coupled to the at least one electrode on the protection circuit module.

"In yet another aspect, the protection circuit module is positioned on the first surface so that the at least one electrode tab can be coupled to the at least one terminal on the protection circuit module without bending the at least one electrode tab."

For more information, see this patent: Jang, Youngcheol; Kwak, Eunok. Lithium Polymer Battery. U.S. Patent Number 9065083, filed May 5, 2009, and published online on June 23, 2015. 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=9065083.PN.&OS=PN/9065083RS=PN/9065083

Keywords for this news article include: Electronics, Circuit Board, SAMSUNG SDI CO. LTD.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2015, NewsRx LLC

(c) 2015 NewsRx LLC, source Science Newsletters

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