Nec Corporation

Other

Fuji Jukogyo Kabushiki Kaisha

Nec Tokin Corporation

Nihon Parkerizing Co., Ltd.

Envision Aesc Energy Devices Ltd.

Nec Tokin Tochigi, Ltd.

Hiroshi Yageta

Makihiro Otohata

Masatomo Mizuta

Masaharu Satoh

Yutaka Bannai

Masato Shirakata

Etsuo Hasegawa

Nobuaki Yoshioka

Norihide Ohyama

Shigeyuki Iwasa

Kentaro Nakahara

Kazuaki Utsumi

Yukiko Morioka

Tomokazu Kumeuchi

Takeshi Kanai

Kiyokazu Oikawa

Toshihiko Mankyu

Atsushi Kobayashi

Akira Kobayashi

Takashi Fukaumi

Tatsuji Numata

Hiroyuki Iizuka

Masatomo Yonezawa

Hidemasa Kawai

Chika Kanbe

Kosuke Amano

Takao Daidoji

Tomohide Date

Tetsuya Takashima

Ikuo Kojima

Ryuichi Shimizu

A packaged battery, an assembled battery, and a film-covered battery, which can prevent a dangerous state involving a high-pressure gas filled in the film-covered battery while ensuring a sealing reliability, are provided. The Packaged battery includes film-covered batteryincluding a battery element and exterior films forming a sealed space housing the battery element, and holding memberholding film-covered battery. The sealed space includes a housing section housing the battery element, and a pocket communicating with the housing section to expand when the pressure in the sealed space increases. The pocket includes a safety valve which activates when the pocket expands. Holding memberincludes an opening and a cavity fitting the housing section therein. When the housing section is fitted into the cavity, at least part of the pocket and the safety valve protrude to the outside of the holding member from the opening.

Packaged battery, stacked battery assembly, and film-covered battery

A joint section where covering films,of film-covered batteryare heat-sealed together is formed with flat surface' having thickness tand groovehaving thickness t. Grooveserves to reduce the projection area of film-covered batteryby folding sidetoward receiving sectionwith grooveserving as an edge, and grooveis made thinner than flat surface&#x2032; by &#x394;t=t&#x2212;t. Therefore, the length of covering filmsproduced on outer sideis shortened as compared with the case of folding the portion that has thickness t.

Film-clad battery and method of producing film-clad battery

A releasing pressure and a pressure releasing position, when enclosing films are expanded by gas produced at an abnormal time, are easily and positively configured. A film-enclosed battery () has a battery element () and two enclosing films () for sealing the battery element (). The enclosing films () include heat-sealable resin layers and air-impermeable layers, and the heat-sealable resin layers and air-impermeable layers, and the heat-sealable resin layers that are face each other hold the battery element () and seal the battery element () when their peripheral edges are thermally fused. A cross-linking structure () formed by cross-linking heat-sealable resin layer is formed in one of the enclosing films () so that a region in part of a heat-sealed area () has a position exposed to a battery element housing unit and another portion in contact with outside air.

Film-encased electric device and production method therefor

A battery is fabricated on the basis of at least one of the following four concepts, i.e., lead terminals passing through a package not lower than the uppermost surface of an electrolyte cell, lead terminals projecting from a package in directions opposite to each other, a film package with a crushed portion expandable for accumulating gas and sheets of gas barrier sealant for keeping the boundaries between component parts of a package sealed; the seal is hardly broken so that the battery is durable and highly reliable.

Film packaged battery having a cupped portion

Battery elementis sandwiched between and surrounded by casing filmseach having a thermo-fusing resin layer, and is sealed by thermally fused regionformed by thermally fusing around the overall periphery. Cross-link structure portionis formed in part of thermally fused regionby cross-linking casing film, and gas release chamberis formed with its leading end positioned in cross-link structure portion. Gas release chamberis a portion which is surrounded by thermally fused regionalong its periphery, and in which casing filmsare not thermally fused. Tubewhich is open at both ends is connected to gas release chamber, while sandwiched between casing films, with its leading end positioned in gas release chamber

Film-covered electric device and method of manufacturing same

A film-covered batteryincludes battery elementand laminate filmsandfor sealing battery element. Laminate filmsandare realized by laminating a heat-seal resin layer and a metal foil layer and seal battery elementby arranging the films on either side of battery elementwith the heat-seal resin layers disposed on the inside and then heat-sealing at sealing areasandon the outer peripheries of the films. The areas of the laminate filmsandother than sealing areasandare electron beam irradiation areasandthat are irradiated by an electron beam. Cross-linked structures are formed in the heat-seal resin layers of electron beam irradiation areasandby irradiation by an electron beam.

Battery with laminated film covering and fabrication method

The occurrence of micro-crack is prevented at the root of a thermally sealed area of casing materials even if a thick electric device element is sealed. Film covered batteryhas cell elementto which leadsare connected, and casing filmsfor sealing cell elementwith leadsextended therefrom. Casing filmsare thermally sealed along the periphery to seal cell element. Thermally sealed areaof casing filmsis positioned between both surfaces of cell elementin the thickness direction of cell element. On a side of casing filmsfrom which leadsare not extended, close contact zone, in which casing filmsare not thermally sealed to each other but are in close contact with each other, is formed continuously to a space which receives cell element. Close contact zonehas a length of one-half or more of the distance from one end to the other end of an inner edge of thermally sealed area

Film covered electric device and method of manufacturing the same

A radical compound may be used as an active material for an anode layerto provide a novel stable secondary battery with a higher energy density and a larger capacity. The radical compound used has, for example, a spin concentration of 10spins/g or more.

Secondary battery with a radical compound active material

A film covered battery has a battery element, a positive and a negative lead terminal connected to the battery element, and a casing for sealing the lead terminals and the battery element together with an electrolytic solution, with portions of the lead terminals extending therefrom. The casing has a buffer in at least a portion thereof for accumulating a gas generated within the casing through deformation of the casing. The buffer is formed continuously with a region for accommodating the battery element.

Film covered battery and stacked battery assembly

A film-covered electric device has an electric device element and casing films. The casing films include a sealing area formed by thermally fusing the facing surfaces of the casing films together around the periphery of the electric device element, an electric device element receiving part encapsulating the electric device element inside the sealing area, and unfused portions formed in the shape of cove communicating with the electric device element receiving part. The casing films further include a stress concentrating portion touching the unfused portions for concentrating thereon the peeling stress of the casing films generated at the sealing area by the expansion of the electric device element receiving part, and a pressure releasing part is formed in the stress concentrating portion.

Film-covered electric device having pressure release opening

A film covered battery has a battery element, a casing for sealing the battery element, and lead terminals connected to a positive electrode and a negative electrode, respectively, of the battery element, and extending from the casing. The casing is flexible, and is comprised of two halves for sealably sandwiching the battery element on both sides in the thickness direction thereof. One of the halves of the casing, sandwiching the battery element, is formed with a recess for receiving the battery element. The lead terminals are each connected to the battery element at a position inside of both surfaces of the battery element in the thickness direction.

Film covered battery

Growing community of inventors

Tokyo, Japan

Hiroshi Yageta