Sanyo Electric Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Panasonic Corporation

Yasuhiro Yamauchi

Toshiyuki Nohma

Takayuki Hattori

Yoshinori Yokoyama

Eiji Okutani

Kenji Nansaka

Ryoichi Wakimoto

Yasutomo Taniguchi

Naoya Nakanishi

Toshihiro Takada

Hiroshi Inukai

Satoshi Narukawa

Kazuhiro Kitaoka

Hironori Harada

Takenori Kimura

Hiroshi Hosokawa

Takashi Kondou

Masahiro Sakai

Toyoki Fujihara

Akira Kiyama

Yusuke Fukui

Tomokazu Yamanaka

Tooru Amazutsumi

Noriyuki Miyazaki

Yusuke Itoh

Hiyoshi Tamaki

Kenji Inagaki

Mikihiko Nishitani

Wataru Shinohara

Keisuke Minami

Yasuaki Yamamoto

Yosuke Honda

Masakazu Yamada

Satoshi Yoshida

Ryuta Morishima

Michiko Okafuji

Toru Amazutsumi

Hirofumi Furukawa

Hideki Fukuda

Takumi Mishiro

Yasuyuki Kusumoto

Keisuke Okada

Yasushi Tsuchida

Shigeki Matsuta

Kouichi Satoh

Yohei Muroya

Atsuhiro Funahashi

Takuichi Arai

Seiji Omura

Shingo Ochi

Masahide Miyake

Tatsuhito Horiuchi

Toyoji Machida

Kazuro Moriwaki

Mitsunori Hara

Yoshinobu Okumura

Masahiro Iyori

Naoya Tada

Takeshi Yoshida

Takuya Morimoto

Toshio Yanagida

Seiji Morita

Hirofusa Tanaka

Hiromasa Nishijima

Keiichi Tsujioku

Takashi Tokunaga

Nobuaki Masaki

Naoki Terada

Syouzaburou Saji

Hironobu Aratani

Yukio Asayama

Yoshiyuki Furukouji

Yoshiya Maruyama

A secondary battery includes an electrode assembly including first and second electrodes, an outer body having an opening and housing the electrode assembly, a conductive sealing plate sealing the opening, and a deformable member. The sealing plate has a first through-hole. The deformable member seals the first through-hole. When the opening of the outer body faces upward, a second electrode connecting member electrically connected to the second electrode is above the deformable member. A conductive conducting member is disposed between the second electrode connecting member and the deformable member. The diameter of the conducting member is larger than the diameter of the first through-hole. When the pressure inside the outer body becomes equal to or higher than a predetermined value, the deformable member is deformed and brings the conducting member into contact with the second electrode connecting member and electrically connects the sealing plate and the second electrode connecting member.

Secondary battery and secondary battery assembly

A first electrode body element and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a lead portion of a positive electrode collector attached to a sealing plate, a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a lead portion of a negative electrode collector attached to the sealing plate, and the first electrode body element and the second electrode body element are arranged together as one such that an electrode body is formed.

Method for manufacturing prismatic secondary battery

The positive electrode substrate exposed portions or the negative electrode substrate exposed portions, or both, of an electrode assembly is split into two groups, and therebetween is disposed an intermediate member made of a resin material and holding one or more connecting conductive members. Collector members for the substrate exposed portions split into two groups is electrically joined by a resistance welding method to the substrate exposed portions split into two groups, together with the connecting conductive member(s) of the intermediate member. The resin material portion of the intermediate member protrudes, in the extension direction of the substrate exposed portions split into two groups, beyond the ends of the substrate exposed portions split into two groups and the ends of the collector member to a prismatic outer can. This structure enables enhanced resistance between the substrate exposed portions and the collector member and curbs variation in the welding strength.

Prismatic sealed secondary battery

A secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, an exterior body having an opening and accommodating the electrode body, a sealing body sealing the opening, a terminal electrically connected to the positive-electrode sheet and extending through a through-hole formed in the sealing body, and a conductive member connected to the terminal outside the sealing body. The conductive member includes a fuse. The fuse is covered by a cover. An insulating member is disposed between the conductive member including the fuse and the sealing body.

Secondary battery and assembled battery

An electrode body including a positive electrode plate and a negative electrode plate is accommodated in a prismatic outer package having an opening. The opening of the prismatic outer package is sealed with a sealing plate. The electrode body includes positive electrode tab portions stacked at an end portion on the sealing plate side. The stacked positive electrode tab portions are divided into two forming a first tab group and a second tab group. A resin member serving as a holding member holding a metal member is fixed to the sealing plate. The metal member is disposed between the first tab group and the second tab group. Lead portions of a positive electrode collector is connected to the first tab group and the second tab group at a surface positioned opposite to a surface that opposes the metal member.

Prismatic secondary battery

A rectangular secondary battery according to the present invention includes an electroconductive member, a first insulating member, a pressure-sensitive circuit breaker that includes an inversion plate and a positive electrode current collector. The electroconductive member has a first outer side surface and a second outer side surface that face away from each other. The first insulating member includes a pair of short side walls. One of the short side walls is located outside of the first outer side surface and presses the first outer side surface toward the second outer side surface. The other short side wall is located outside of the second outer side surface and presses the second outer side surface toward the first outer side surface.

Rectangular secondary battery and method of making the same

A prismatic secondary battery in which a deformation plate becoming deformed when a pressure inside the battery becomes equivalent to or higher than a predetermined value is disposed in a conductive path between a positive electrode plate and a positive electrode terminal. A positive electrode collector electrically connected to the positive electrode plate includes a collector body portion disposed on an electrode body side of the deformation plate, a collector connection that extends from an end of the collector body portion in a longitudinal direction of a sealing plate towards the sealing plate, and a lead portion that extends from the collector connection in the longitudinal direction of the sealing plate. A positive electrode tab portion is connected to the lead portion.

In a prismatic sealed secondary battery provided with an outer can made of a metal, the ability of inserting the electrode assembly into the outer can is improved to restrain the displacement and damages of the insulation member when inserting the electrode assembly into the outer can. The prismatic sealed secondary battery of the present invention includes an insulation member having a bottomed box shape which is a shape obtained by eliminating the upper surface from the surfaces of a hexahedron having a cuboid form, wherein each width of at least a pair of side surfaces facing each other in the insulation member is smaller than the width of the electrode assembly facing the pair of side surfaces.

Square-shaped sealed secondary battery and method of manufacturing same

A nonaqueous electrolyte secondary battery includes a positive electrode plate including a positive electrode core and a positive electrode mixture layer formed thereon; a negative electrode plate including a negative electrode core and a negative electrode mixture layer formed thereon; a wound electrode assembly in which the positive electrode plate and the negative electrode plate are wound with a separator therebetween so as to be insulated from each other; a nonaqueous electrolyte solution; a pressure-responsive current interruption mechanism electrically connected to at least one of the positive electrode plate and the negative electrode plate; and an outer casing. Excess electrolyte solution is present outside the electrode assembly in the outer casing. The liquid level of the excess electrolyte solution is at such a height that the excess electrolyte solution does not come into contact with a component of the current interruption mechanism when the outer casing is placed horizontally.

Non-aqueous electrolyte secondary battery

A prismatic secondary battery of one configuration has a current disconnection mechanism, and a distance from a first conductive member to a second conductive member along a surface of a first insulation member and passing an outer periphery of the first insulation member is greater than or equal to 2.4 mm. At least one of the first insulation member and a second insulation member is formed from a material having a weight reduction percentage of 100% in thermo gravimetric measurement under conditions of a measurement temperature of 25&#xb0; C.-600&#xb0; C., a temperature increase rate of 5&#xb0; C.&#xb1;0.5&#xb0; C./min, a measurement atmosphere of inert gas flow, and an amount of measurement sample of 10 mg&#xb1;5 mg.

Prismatic secondary battery having spark prevention mechanism and battery pack using the same

A prismatic secondary battery in which a deformation plate becoming deformed when a pressure inside the battery becomes equivalent to or higher than a predetermined value is disposed in a conductive path between a positive electrode plate and a positive electrode terminal, a positive electrode collector connected to the positive electrode plate includes a collector body portion, a collector connection, and a lead portion, the end portion of the lead portion on one end portion side of the sealing plate in the longitudinal direction is positioned on the one end portion side of the sealing plate in the longitudinal direction with respect to an end portion of the collector body portion on the one end portion side of the sealing plate in the longitudinal direction, the collector body portion is connected to the deformation plate, and the lead portion is connected to a positive lead portion.

Growing community of inventors

Sumoto, Japan

Yasuhiro Yamauchi