Nissan Motor Company Limited

Kao Corporation

Mitsubishi Kasei Corporation

Kasai Kogyo Co., Ltd.

Kyoichi Watanabe

Hideaki Horie

Osamu Shimamura

Takaaki Abe

Hiroshi Sugawara

Kouichi Nemoto

Kenji Hosaka

Hajime Sato

Takamitsu Saito

Yuuji Tanjou

Tamaki Miura

Takuya Kinoshita

Jun Okada

Hiroaki Miura

Kazuo Oki

Takanori Ito

Hiroaki Kitayama

Minoru Sawai

Takanori Itou

Ryouichi Senbokuya

Takamitsu Saitou

Satoshi Nagashima

Masakazu Kobayashi

Yoshio Shimoida

Kenichi Nishimura

Katsumi Morohoshi

Kazuki Miyatake

Takayuki Fukui

Yasuhisa Fukumoto

Ryuichi Akagi

Takeshi Yamauchi

Makio Nagata

Shousuke Oku

Masashi Itou

Hiroshi Matsukawa

Motohiro Orimo

Hideaki Hori

In an assembled battery including at least two unit cells provided within a supporter, each unit cell is a thin laminate cell packaged with a laminate, and each unit cell is covered by at least one resin. Thus, the assembled battery has a stable performance without structure breakdown or a fracture of the connection tab even when vibration is applied.

Assembled battery

Disclosed is a cell with a power-generating element and an outer package. The power-generating element includes a unit cell layer including a first electrode, a second electrode and an electrolyte layer disposed between the first and second electrodes. In the first electrode, a first collector is provided with one of a positive electrode active material layer and a negative electrode active material layer. In the second electrode, a second collector is provided with the other one of the positive and negative electrode active material layers. The first and second collectors have thicknesses such that when a conductor from outside penetrates at least two cells and a short circuit is formed between two cells via the conductor, shorted portions of the first and second collectors are fused by the heat generated by the current before the temperature of the cells reaches a predetermined value so that the short circuit is blocked.

Cell for reducing short circuit and battery incorporating the cell

A battery is provided with a plurality of unit cells each having a tab, a bus bar connecting the tab of one of the plurality of unit cells and the tab of another one of the plurality of unit cells, and a plurality of welding points disposed on a center of gravity of an area, in which the bus bar and the tab are overlapped, or a vicinity thereof, and at least one position of line segments, radiately extending from the center of gravity, or a vicinity thereof, such that the bus bar and the tab are connected to one another at the plurality of welding points.

Battery and related method

The positive electrode active material sintered body for a battery of the present invention is a positive electrode active material sintered body for a battery satisfying the following requirements (I) to (VII): (I) fine particles in a positive electrode active material are sintered to constitute the sintered body; (II) a peak pore diameter which provides a maximum differential pore volume value in a pore diameter range of 0.01 to 10 &#x3bc;m in a pore distribution is 0.3 to 5 &#x3bc;m; (III) a total pore volume is 0.1 to 1 cc/g; (IV) an average particle diameter is not less than the peak pore diameter and not more than 20 &#x3bc;m; (V) any peak, which provides a differential pore volume value of not less than 10% of the maximum differential pore volume value, is not present on a smaller pore diameter side than the peak pore diameter in the pore distribution; (VI) a BET specific surface area is 1 to 6 m/g; and (VII) a full width at half maximum of a strongest X-ray diffraction peak is 0.13 to 0.2.

Positive electrode active material sintered body for battery

The burned composite metal oxide of the present invention is a burned composite metal oxide which is porous and particulate and which is obtained by subjecting a slurry comprising at least one metal oxide (a), at least one metal compound (b) and a solvent to spray granulation to obtain granules, and burning the granules, the metal oxide (a) selected from the group consisting of a transition metal oxide and an oxide of a metal belonging to 3B, 4B and 5B of a periodic table, the metal compound (b) selected from the group consisting of an alkali metal compound and an alkali earth metal compound, wherein the metal oxide (a) and the metal compound (b) are sparingly soluble in the solvent; the burning is conducted after a heat-maintaining step of heating the granules obtained by the spray granulation at a temperature in a range of &#xb1;200&#xb0; C. based on the decomposition temperature of the metal compound (b); and the metal compound (b) contains at least a nonmetallic element component desorbed in the heat-maintaining step.

Burned composite metal oxide and process for producing the same

The present invention provides a composite material for positive electrodes of lithium batteries, which provides a lithium battery having excellent high rate electrical discharge characteristics, has a sufficiently secured diffusion passage for Li, and has high conductivity, a process for producing the same, as well as a positive electrode and a battery using the composite material for positive electrodes of lithium batteries. The present invention relates to a composite material for positive electrodes of lithium batteries, comprising composite particles containing positive electrode active material particles and fibrous carbons, wherein the composite particles have a form in which the positive electrode active material particles are supported by the fibrous carbons.

Composite material for positive electrode of lithium battery

The present invention provides a bipolar battery made by using a polymer gel electrolyte or a liquid electrolyte in an electrolyte layer, which is highly reliable and prevents liquid junction (short circuit) caused by leak out of an electrolyte solution from the electrolyte part. The present invention provides a bipolar battery laminated, in series, with a plurality pieces of bipolar electrodes which is formed with a positive electrode on one surface of a collector, and a negative electrode on the other surface, so as to sandwich an electrolyte layer, characterized by being provided with a separator which retains the electrolyte later, and a seal resin which is formed and arranged at the outer circumference part of a part of the separator where the electrolyte is retained.

Bipolar battery

A battery structure for improving a heat dissipating property and a vibration absorbing performance. The battery structure comprises a plurality of unit cell layers, each formed by alternately stacking a cathode active material layer formed on a surface of one collector, a separator for retaining an electrolyte and an anode active material layer formed on a surface of another collector. The battery structure also comprises a heat dissipating member disposed between at least one unit cell layer and another unit cell layer.

Battery structure

A bipolar battery includes: a bipolar electrode composed, by forming a positive electrode active material layeran one surface of a current collector and forming a negative electrode active material layeron the other surface; and a separatorcomposed to be stacked alternately with the bipolar electrode, wherein, in a single cell layercomposed by including the positive electrode active material layer, the separatorand the negative electrode active material layer, which are adjacent to one another, a thickness of the separatoris 0.68 times or more to less than 1.0 times a thickness of the positive electrode active material layer, and is 0.68 times or more to less than 1.0 times a thickness of the negative electrode active material layer

Battery structure, assembled battery, and vehicle mounting these thereon

A battery of the present invention is provided with positive and negative terminals led out of the battery and one or more sealing members filled between the positive and negative terminals and the battery. Each of the sealing members is provided with one or more resin layers, each of which is provided with one or more non-molecular-oriented resin layers.

Deformation resistant battery, group-battery, multiple group-battery and automobile therewith

A method of manufacturing a battery is provided including the step of locating a plurality of unit cells in a support body having an opening portion. A plurality of jigs each having a convex portion and a bore are mounted at the support body so as to cause the convex portion to be fit into the opening portion of the support body. A spacing between the support body and the plurality of the unit cells is filled with a plastic resin by charging the plastic resin into the spacing between the support body and the plurality of unit cells through the bore of one jig of the plurality of jigs, while releasing air inside the support body through the bore of another jig of the plurality of jigs that is opposite to the one jig.

Battery and related manufacturing method

A battery includes a battery enclosure (), a power-generating unit () accommodated in the battery enclosure (), positive and negative terminal electrodes (). The battery enclosure () is composed of a laminate film compounded of metal and a polymer material, and has a rectangular shape. The power-generating unit () includes positive electrode collectors (), negative electrode collectors () and separators (). The positive and negative terminal electrodes () have dimensions substantially equal to those of the positive and negative electrode collectors (), respectively. Further, the positive and negative terminal electrodes () protrude from mutually different sides of the battery enclosure (). The positive terminal electrode () is formed by protruding the positive electrode collectors () from the battery enclosure () in a state where end portions of the positive electrode collectors () are mutually stacked. The negative terminal electrode () is formed by protruding the negative electrode collectors () from the battery enclosure () in a state where end portions of the negative electrode collectors () are mutually stacked.

Battery formed of a stack of substantially rectangular electrodes

A bipolar battery of the present invention includes a battery element composed by stacking in series a plurality of bipolar electrodes, in each of which a positive electrode is formed on one surface of a collector and a negative electrode is formed on the other surface, with electrolytes interposed therebetween. Further, the bipolar battery includes laminate films covering the battery element, each of the laminate films containing a metal layer, and tabs composed by being extracted from the battery element to outsides of the laminate films. In the bipolar battery, thickness of a resin layer interposed between the tab and the metal layer is equal to or more than thickness of the tab.

Bipolar battery, assembled battery, combination assembled battery, and vehicle using the assembled battery or the combination assembled battery

Growing community of inventors

Yokohama, Japan

Kyoichi Watanabe