Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Sumitomo Electric Industries, Limited

Yoshio Moriwaki

Takaharu Gamo

Tsutomu Iwaki

Toshio Yamashita

Isao Matsumoto

Yoichi Izumi

Masataro Fukuda

Akihiro Maeda

Akemi Shintani

Yasuharu Yamamura

Hajime Seri

Hideo Kaiya

Nobuyuki Yanagihara

Hirokazu Kimiya

Yoichiro Tsuji

Keisuke Tanaka

Sumihito Ishida

Mamoru Iida

Akira Iwase

Susumu Kitaoka

Sou Kuranaka

Kazuhito Hatoh

Hiroshi Kawano

Hisaaki Gyoten

Yoshinori Toyoguchi

Shingo Tsuda

Noboru Taniguchi

Shozo Fujiwara

Junji Niikura

Hiroyuki Sakamoto

Tadayasu Mitsumata

Hidekatsu Izumi

Saburo Nakatsuka

Takaharu Gamou

Chiaki Iwakura

Isao Takeshita

Kenichiro Shibata

Minoru Tagashira

Yoshio Goda

Masahiko Ogawa

Takeo Takayanagi

Norikatsu Akutsu

Naoji Furukawa

Masakage Komori

Katsumi Yamashita

Mizuo Iwasaki

Yasuhiko Yamasaki

Takashi Tokuhiro

Hidekazu Eguchi

A non-aqueous electrolyte secondary battery comprising: a positive electrode plate including an outer jacket comprising a sheet-shaped positive electrode current collector and a positive electrode active material layer formed on an inner surface of the outer jacket except for a peripheral portion thereof; a negative electrode plate including an outer jacket comprising a sheet-shaped negative electrode current collector and a negative electrode active material layer formed on an inner surface of the outer jacket except for a peripheral portion thereof; a separator layer comprising a polymer electrolyte interposed between the positive electrode active material layer and the negative electrode active material layer, wherein the peripheral portion of the positive electrode current collector and the peripheral portion of the negative electrode current collector are bonded together, with an insulating material interposed therebetween.

Method for producing non-aqueous electrolyte secondary battery

Non-aqueous electrolyte secondary battery assembly

In order to obtain a nickel-metal hydride storage battery having a long cycle life and a low self-discharge rate, in a nickel-metal hydride storage battery comprising: a positive electrode containing nickel hydroxide; a negative electrode containing a hydrogen storage alloy; a separator interposed between the positive and negative electrodes; and an electrolyte comprising an aqueous alkaline solution, a water absorbent polymer, a water repellent and an aqueous alkaline solution are added into the separator. This battery can be produced with low cost.

Nickel-metal hydride storage battery and production method thereof

An alkaline storage battery comprising an improved separator and having a high energy density and an excellent cycle life characteristic is disclosed. The alkaline storage battery in accordance with the present invention comprises a positive electrode including a nickel hydroxide material as an active material, a negative electrode, a separator and an electrolyte, wherein the nickel hydroxide material of the positive electrode contains at least Mn or is disposed with a coating of a cobalt oxide material on its surface and wherein the separator carries particles of a hydrophilic and insulating metal oxide directly attached to its surface. The metal oxide particle is preferably at least one selected from the group consisting of titanium oxide, aluminum oxide, zirconium oxide, potassium titanate, tungsten oxide, and zinc oxide. The most preferable one is anatase type TiO .

Alkaline storage battery

The present invention relates to a hydrogen storage alloy electrode composed of a hydrogen storage alloy having a CaCu region and a Ce Ni region in the crystal structure and satisfies the relational formula: p:q&equals;1:(4&plus;a), where p is the sum of the mole fraction of an element occupying the Ca site of the CaCu region and the mole fraction of an element occupying the Ce site of the Ce Ni region, q is the sum of the mole fraction of an element occupying the Cu site of the CaCu region and the mole fraction of an element occupying the Ni site of the Ce Ni region, and &minus;0.2&lE;a&lE;0.4. Accordingly, although the hydrogen storage alloy electrode contains a little or no Co, it is possible to obtain an electrode having little deterioration due to pulverization of the alloy and a high capacity.

Hydrogen absorbing alloy electrode, electrode producing method and alkali storage battery

The present invention uses a magnesium-based alloy which is excellent in mechanical workability to be formed thinner than conventional alloys. The present invention provides a lithium secondary battery comprising an electrode assembly and a non-aqueous electrolyte, both accommodated in a metal jacket, wherein the metal jacket is made of a magnesium-based alloy containing lithium in an amount of 7 to 20% by weight; and a metal layer or an insulating layer for preventing corrosion of the metal jacket is formed integrally with the metal jacket on the inner wall thereof.

Lithium secondary battery and method of manufacturing the same

In the description, a hydrogen storage alloy electrode comprising a hydrogen storage alloy and a conductive metal and completely free of organic binder is disclosed, wherein at least two layers of an active material holding layer and a conductive metal layer essentially are integrated into an electrode sheet having a conductive network communicating throughout the electrode. The electrode can be used in a nickel-metal hydride storage battery, for example, particularly exhibits high efficiency charge/discharge characteristics while satisfying general characteristics as a battery, and has a relatively low cost and facilitates recycling.

Hydrogen storage alloy electrode, battery including the same and method for producing the both

In a first process, an electrically conductive thin metal plate is subjected to a press molding process employing a plurality of punches in a primary molding block and a plurality of dies in a secondary molding block , so as to form therein a plurality of hollow projections that project from one side of the metal plate , and bulges that bulge out in a direction opposite to that of the projections , positioned between the projections . In a second process, the metal plate on which have been formed the plurality of projections and bulges is subjected to either chemical etching or electrolytic etching, so as to form through holes by corrosively removing thin-walled portions from the tips of the projections , and, at the same time, to corrosively form innumerable fine irregularities over the entire surface of the metal plate

Battery cell electrode core plate, fabrication method therefor, and battery cell made therewith

A metal sheet ( ) which constitutes a non-sintered type electrode support is processed to have minute irregularities on its surface. The irregularities are formed by a mechanical method such that protrusions ( ) and indentations ( ) are configured with a center-to-center pitch (P) in the range of from 50 to 300 &mgr;m and such that the apparent thickness after processing is at least three times as large as the unprocessed material thickness.

Non-sintered electrode and method of manufacturing same

A nickel positive electrode including an active material mixture mainly composed of a nickel oxide and an electrically conductive support, a metal and/or an oxide thereof including elements effective for increasing oxygen overvoltage, preferably at least one element selected from Ca, Ti, Nb, Cr, Y and Yb is contained in a conducting agent such as metallic Co and/or Co oxide added to supplement the electrical conductivity of the active material. By virtue of this construction, the decrease of charging efficiency caused by increase of battery temperature and decrease of the oxygen overvoltage with charging of the battery can be inhibited and the charging efficiency can be improved in a wide temperature atmosphere. Thus, a nickel-metal hydride storage battery of high capacity can be provided.

A battery has elements for electromotive-force accommodated in a metal outer can which has a bottom having a cylindrical, prismatic or similar shape. The ratio of the bottom thickness (TA) the side thickness (TB) is 1.5-7.0. The metal outer can contains primarily iron and a layer of nickel is provided on at least the inner face of the battery. Shallow grooves are formed on the nickel layer perpendicular to the bottom face. An iron-based metallic sheet formed with a nickel layer on at least one face is subjected to drawing forming into a tubular shape having a bottom, continuous ironing processing being performed such that the side of the can formed in the tubular shape has an ironing ratio in the range of 20% to 90% and a metal outer can is thereby manufactured having a ratio of a bottom thickness to its side thickness from 1.5 to 7.0, having a cylindrical shape, prismatic shape or shape similar thereto, and with shallow longitudinal grooves formed in a nickel layer provided on the battery inside face.

Metal outer can for a battery and method of manufacturing same

A battery accommodates elements for electromotive-force within a metal case. This metal case is a metal case having a bottom wherein the bottom thickness/side thickness ratio has a value of 1.2-4.0 and has a cylindrical, prismatic or similar shape. The metal case is constructed of a metal material whose chief constituent is aluminum. Furthermore, it is desirable that a multiplicity of shallow grooves perpendicular to a bottom face are formed in at least a battery inside face of the metal case and moreover that a nickel layer is provided on the battery inside face. The metal case is made by DI processing involving drawing and ironing, to have a value of bottom thickness/side thickness ratio which was hitherto unavailable,i.e., 1.2-4.0 can be obtained.

Battery and method of manufacturing therefor

A high energy density alkaline storage battery which uses a positive electrode including mainly nickel oxide is provided by increasing the capacities of the positive electrode and negative electrode. For increasing the capacity density of the positive electrode, the active material is incorporated as a solid solution with at least one element selected from manganese, chromium, aluminum and calcium in the range of from not less than 3 mol % to not more than 15 mol % relative to the active material, and the surface and/or the neighborhood of the surface of the active material are coated with a cobalt oxyhydroxide having a high electric conductivity of a specific resistance of 15 &OHgr;&middot;cm or less and a low crystallinity.

A jar can for a secondary battery is formed by deep-drawing a clad material prepared by bonding an aluminum sheet and an iron sheet to each other. A nickel layer is formed between the iron sheet and the aluminum sheet. Another nickel layer is formed on another surface of the iron sheet. Thus, a lightweight jar can for a secondary battery having high rigidity is obtained.

Jar can for secondary battery

The present invention provides alkaline storage batteries of which high-rate discharge characteristic at low-temperature, cycle life, and storage performance at high-temperature are improved in good balance and the cost performance is superior even when the content of cobalt is made extremely low by using in the negative electrode consisting of hydrogen absorbing alloy powders based on MmNi system alloys comprising MmNi.sub.5 system alloy which remains mostly crystalline in phase when absorbing hydrogen and Mm.sub.2 Ni.sub.7 system alloy which turns mostly amorphous in phase upon absorbing hydrogen.

Negative electrode for alkaline storage batteries

Growing community of inventors

Hirakata, Japan

Yoshio Moriwaki