Sony Corporation

Murata Manufacturing Co., Ltd.

Ken Segawa

Takeru Yamamoto

Takashi Tomita

Masaru Hiratsuka

Shunsuke Saito

Toshiro Endo

Yoshinori Ito

Shigeru Fujita

Kazuhiro Ohba

Yukio Miyaki

Hiroyuki Akashi

Yuzuru Fukushima

Takayuki Aita

Hideaki Ojima

Emi Yamada

Sam Huy

Michiko Komiyama

Yasunobu Iwakoshi

Akira Toda

A battery pack has a battery obtained by packing a battery element with a packing member. The battery element is formed by winding or laminating an anode and a cathode through separators. The battery pack includes frame member surrounding the packing member packing the battery element and a coating layer constituted of a curable resin formed on surfaces of the packing member which are surrounded and demarcated by the frame member.

Battery pack and manufacturing method therefor

Battery pack including a frame member surrounding a packing member and manufacturing method therefor

A battery pack includes: a battery including a battery element covered with a packaging member, the battery element including a positive electrode and a negative electrode which are spirally wound together or stacked on one another through a separator; a protection circuit board for the battery; and a covering material collectively covering the battery and the protection circuit board. The covering material includes a shape-retaining polymer. The shape-retaining polymer contains an insulating curable polyurethane resin including polyol and polyisocyanate.

Battery pack and method for producing the same

A battery pack includes a battery including a battery element covered with a packaging member, a battery protection circuit board, a covering material, and a rippable portion formed in a part of the covering material. The battery element includes a positive electrode and a negative electrode which are spirally wound or stacked through a separator. The covering material collectively covers the battery and the battery protection circuit board. The rippable portion rips open due to a gas generated from the battery in the event of an abnormal condition to form a gas release hole for releasing the gas outside the battery pack.

A cathode material capable of improving capacity and superior low temperature characteristics, and a battery using the cathode material are provided. A cathode and an anode are layered with an electrolyte layer and a separator in between. The cathode contains a complex oxide containing lithium, manganese, nickel, and cobalt; a complex oxide containing lithium and at least one of nickel and cobalt; and a complex oxide containing lithium and manganese and having a spinel structure or a phosphorus oxide containing lithium and iron at a given ratio.

Cathode material and battery

A nonaqueous electrolyte battery capable of minimizing damage if the battery is crushed by pressure is disclosed. The nonaqueous electrolyte battery according to the present invention includes a spiral coil formed by, through a separator, winding a positive electrode having an elongated positive-electrode collector with two sides on each of which an active material for the positive electrode has been formed and a negative electrode having an elongated negative-electrode collector with two sides on each of which an active material for the negative electrode has been formed. Wherein the positive electrode has a lengthwise directional end which has two sides, each of which is provided with a positive-electrode-collector exposed portion in which a positive-electrode collector is exposed, the negative electrode has a lengthwise directional end which has two sides, each of which is provided with a negative-electrode-collector exposed portion in which a negative-electrode collector is exposed, and the positive-electrode-collector exposed portion and the negative-electrode-collector exposed portion cover the coil one or more times through the separator.

Nonaqueous electrolyte battery having exposed electrode collector portions

A solid electrolyte battery includes a battery element in which a cathode having a cathode composite mixture layer formed by applying a cathode composite mixture on a cathode current collector so as to provide a part to which the cathode composite mixture is not applied at an end part in the longitudinal direction of the cathode current collector and an anode having an anode composite mixture layer formed by applying an anode composite mixture on an anode current collector so as to provide a part to which the anode composite mixture is not applied at an end part in the longitudinal direction of the anode current collector are laminated so as to provide a solid electrolyte layer between the cathode and the anode. Porous members made of ceramics or non-woven fabrics are arranged between the longitudinal end parts of the cathode composite mixture layer and the longitudinal end parts of the anode composite mixture layer to extend to the parts of the cathode current collector to which the cathode composite mixture is not applied. Thus, a short-circuit in the end parts of the cathode composite mixture layer is prevented and yield upon manufacturing the solid electrolyte battery is improved.

Solid electrolyte battery with porous members between exposed current collectors and method for manufacturing same

A nonaqueous electrolyte batter includes: an electrode body having at least a positive electrode and a negative electrode; a cylindrical container with its bottom closed, in which the electrode body and a nonaqueous electrolytic solution are contained; and a lid body for closing an opening portion of the container. The lid body has a lid portion which constitutes a peripheral edge portion of the lid body, a projecting portion which constitutes a central portion of the lid body, and a stepped portion which has a vent hole and is positioned between the lid portion and the projecting portion. A metal plate having a through-hole is disposed between the lid body and the electrolyte body. With this configuration, it is possible to prevent the movement of the battery by a motive force generated when a decomposition gas generated in an abnormal state is discharged to the outside of the battery.

Nonaqueous electrolyte battery and production method thereof

Growing community of inventors

Fukushima, Japan

Ken Segawa