Nissan Motor Company Limited

Takaaki Abe

Hideaki Horie

Osamu Shimamura

Hiroshi Sugawara

Kenji Hosaka

Kyoichi Watanabe

Takamitsu Saito

Takanori Ito

Takuya Kinoshita

Mikio Kawai

Toyoaki Nakagawa

Ken Iwai

Hajime Sato

Yuuji Tanjou

Yuji Tanjo

Yoshio Shimoida

Yasuhito Miyazaki

Masaaki Suzuki

Yasuhiko Ohsawa

Yasunari Hisamitsu

Yuuji Tanjo

Ryouichi Senbokuya

Takanori Itou

Tomaru Ogawa

Takamitsu Saitou

Masakazu Kobayashi

Tatsuhiro Fukuzawa

Fumio Munakata

Satoru Ichikawa

Kenji Ohara

Hiroshi Miyakubo

Kazuki Miyatake

Kyouichi Watanabe

Sohei Suga

Kazuyuki Sakamoto

Kosuke Hagiyama

Tomoya Kubota

Hirotatsu Kamimura

Yukinari Kato

Yasuo Ohta

Naoto Kiriu

Kenji Hamada

Naoto Suzuki

Oasamu Shimamura

Hedeaki Horie

Yukinori Takahashi

Hideaki Hori

A negative electrode for a secondary battery according to the present invention has a collector and a negative electrode active material layer formed on a surface of the collector and containing negative electrode active material particles. In the negative electrode active material layer, an insulating material is arranged between the negative electrode active material particles so as not to develop conductivity by a percolation path throughout the negative electrode active material layer. It is possible in this configuration to effectively prevent the occurrence of a short-circuit current due to an internal short circuit and the generation of heat due to such short-circuit current flow in the secondary battery while securing the battery performance of the secondary battery.

Negative electrode for secondary battery, and process for production thereof

An automobile cell is provided with an electric power generating element composed of a positive electrode having a positive electrode active substance layer, a negative electrode having a negative electrode active substance layer and a separator interposed between the electrodes, a cell outer sheath made of a laminate film compositely composed of polymer and metal, a positive electrode terminal lead electrically conductive with the positive electrode and extending to an outside of the cell outer sheath, and a negative electrode terminal lead electrically conductive with the negative electrode and extending to the outside of the cell outer sheath. The positive electrode and the negative electrode associated therewith via the separator defines a unit electrode, and the relationship between a thickness of the automobile cell and a sum of a thickness of the positive electrode active substance layer and a thickness of the negative electrode active substance layer of the unit electrodes, is defined such that a value obtained by dividing the former by the latter is equal to or less than 80.

Automobile cell and related method

A battery moduleis structured to include a flat-type battery 40 in which current can be taken out from both faces of an electric generation elementin a layered direction, flat-plate-type electrode tabsandhaving a face contact with a current-taking-out plane of the flat-type battery to take out current, and a packaging casecovering the flat-type battery and the electrode tab. The inner face of the packaging case and the electrode tab have therebetween an elastic member

Battery module, assembled battery, and vehicle including these batteries

A battery control device is provided that uses a discharge to adjust the capacitance of cells that form a bipolar battery and calculates the voltage increase value of the remaining cells that do not discharge to adjust capacitance if one or more cells, among all of the cells that form the bipolar battery, are discharged to adjust capacitance in a battery control device that controls voltage dispersion or volume dispersion between cells that form the bipolar battery; and setting the general discharge value when there is a discharge to adjust capacitance on the basis of the result of the voltage increase value calculation.

Bipolar battery control device for adjusting a voltage or capacitance in cells

Disclosed is a battery having an improved life. Specifically disclosed is a battery which comprises an electric power generating element in which one or more unit cell layers are stacked, each being constituted by sequentially laminating or stacking a positive electrode, an electrolyte and a negative electrode; a first collector plate which is provided on the outermost positive electrode surface of the electric power generating element; a second collector plate which is provided on the outermost negative electrode surface of the electric power generating element; a convex or protruding portion provided on the first collector plate and/or the second collector plate with a width that is not less than a half of the width of the end edge of the collector plate; and a terminal which is attached to the convex portion for retrieving electric current from the convex portion.

Battery

A voltage detection terminal (---) and a discharge terminal (-) are connected to a peripheral edge portion of a collector (-) of a bipolar battery (). Assuming a first straight line (Da) that connects a centroid of the collector (-) and the voltage detection terminal (-) and a second straight line (Da) that is orthogonal to the first straight line (Da), the discharge terminal (-) is disposed on an opposite side of the second straight line (Da)-the voltage detection terminal (-). A requirement relating to measurement of a voltage of the collector (-) and a requirement relating to discharge are thereby both satisfied.

Bipolar 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 disclosure relates to bipolar cells including electrodes surrounding a collector. Embodiments of the bipolar cells include a collector containing a high-polymer material. The disclosure also relates to bipolar electrode batteries containing bipolar cells including a collector body containing electrically conductive high-polymer or electrically conductive particles distributed in a high-polymer. By adding such high molecular weight polymer material to the collector, the weight of the collector may be reduced and the output power density per weight of the battery may be improved. The disclosure further relates to methods of forming collecting bodies and electrodes for bipolar cells using an inkjet printing method. Bipolar cells according to the present invention may be used to fabricate batteries such as lithium ion batteries, which may be connected to form battery modules used, for example, to provide electrical power for a motor vehicle.

Bipolar electrode batteries and methods of manufacturing bipolar electrode batteries

A laminate cell comprises a power generating element formed by sequentially stacking positive electrode plates and negative electrode plates while interposing separators therebetween; a positive tab connected to the positive electrode plates through a plurality of positive leads; a negative tab connected to the negative electrode plates through a plurality of negative leads; and a cell package formed of a metal composite film, the cell package hermetically sealing the power generating element and an electrolyte. According to the laminate cell, the heat capacity of a portion of the positive tab, onto which a plurality of the positive leads are joined, and the heat capacity of a portion of the negative tab, onto which a plurality of the negative leads are joined, are made larger than that of other portions of the positive tab and the negative tab.

Laminate cell, assembled battery, battery module and electric vehicle

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.

In a vehicle drive system including a motor and a secondary battery, the motor and secondary battery are integrated to provide a drive system having good mountability. In a gap between a cylindrical outer housing (116) and a rotor (112), a layered cylindrical secondary battery is provided within the outer housing. A cylindrical cooling member (180) is further arranged between the rotor and secondary battery.

Drive system

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

Growing community of inventors

Yokohama, Japan

Takaaki Abe