By a News Reporter-Staff News Editor at Electronics Newsweekly -- Samsung SDI Co., Ltd. (Yongin-si, KR) has been issued patent number 9728765, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.
The patent's inventors are Byun, Sang-Won (Yongin-si, KR); Oh, Jeong-Won (Yongin-si, KR); Koo, Min-Seok (Yongin-si, KR); Kwak, Yun-Jung (Yongin-si, KR).
This patent was filed on December 3, 2014 and was published online on August 8, 2017.
From the background information supplied by the inventors, news correspondents obtained the following quote: "The subject matter disclosed herein relates generally to a rechargeable battery, for example, to a rechargeable battery having a fuse unit.
"A rechargeable battery is a battery that is capable of being charged after having been discharged, unlike a primary battery that is not designed to be charged, discharged, and charged again. A low capacity rechargeable battery is used (utilized) in a small electronic portable device such as, for example, a mobile phone, a laptop computer, and a camcorder. A large capacity battery is extensively used (utilized) as a power supply for a motor for driving (e.g., propelling) a hybrid vehicle.
"Recently, a high power rechargeable battery including a non-aqueous electrolyte having high energy density has been developed. The high power rechargeable battery includes (or is constituted by) a large capacity rechargeable battery in which a plurality of rechargeable batteries are connected in series in order to use (utilize) the high power rechargeable battery to drive devices requiring a large amount of electric power, for example, motors such as those for electric vehicles.
"Further, one large capacity rechargeable battery generally includes a plurality of rechargeable batteries connected in series. The rechargeable batteries may have cylindrical and angular shapes.
"When an extraordinary reaction (e.g., thermal runaway) occurs in a rechargeable battery having a case formed of a material, such as a metal, the pressure therein increases, and there is a risk of explosion or ignition of the rechargeable battery.
"The above information disclosed in this Background section is only for enhancement of understanding of the background of the subject matter disclosed herein and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art."
Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "Aspects of embodiments of the subject matter disclosed herein are directed toward a rechargeable battery in which different fuse units are melted according to a current quantity (or amount).
"An example embodiment provides a rechargeable battery including an electrode assembly including a first electrode and a second electrode. A case is configured to receive the electrode assembly. A first current collecting member includes a first fuse unit coupled to the first electrode and having a cross-sectional area that is smaller than a cross-sectional area of a periphery of the first current collecting member. A second current collecting member includes a second fuse unit connected to the second electrode and having a cross-sectional area that is smaller than a cross-sectional area of a periphery of the second current collecting member. The first fuse unit may be configured to melt more quickly than the second fuse unit at a first current. The second fuse unit may be configured to melt more quickly than the first fuse unit at a second current that is lower than the first current.
"In some embodiments, a melting point of the first fuse unit is M1, a melting point of the second fuse unit is M2, and a resistance of the first fuse unit may be equal to M1/M2 multiplied by a resistance of the second fuse unit.
"The second fuse unit may be longer than the first fuse unit. The second fuse unit may have a cross-sectional area that is smaller than a cross-sectional area of the first fuse unit.
"The first fuse unit may include a material having a specific resistance that is higher than a specific resistance of a material of the second fuse unit. A melting point of the material of the first fuse unit may be lower than a melting point of the material of the second fuse unit.
"The first fuse unit may include aluminum, and the second fuse unit may include copper. A heat emitting member configured to diffuse heat may be at the first fuse unit. An adiabatic member configured to reduce emission of heat may be at the second fuse unit.
"The first current may be 1.5 times to 3.5 times the second current. The first current may be 500 to 3000 A, and the second current may be 3000 to 10,000 A.
"The case may be electrically coupled to the first electrode. A cap plate may be fastened to the case. A short-circuit member that is configured to be deformed by an increase in internal pressure of the rechargeable battery to electrically couple the first electrode and the second electrode may be at the cap plate.
"According to the example embodiment, because a first fuse unit is melted at a first current and a second fuse unit is melted at a second current that is lower than the first current, it is possible to stably block an over-current even though the over-current (e.g., the second current) flows in a relatively small quantity."
For the URL and additional information on this patent, see: Byun, Sang-Won; Oh, Jeong-Won; Koo, Min-Seok; Kwak, Yun-Jung. Rechargeable Battery Having Fuse Unit. U.S. Patent Number 9728765, filed December 3, 2014, and published online on August 8, 2017. 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=9728765.PN.&OS=PN/9728765RS=PN/9728765
Keywords for this news article include: Electronic Equipment Companies.
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