Nissan Motor Company Limited

Ajinomoto Co., Ltd.

Kenji Hosaka

Hideaki Horie

Osamu Shimamura

Hajime Sato

Takaaki Abe

Yoshio Shimoida

Takuya Kinoshita

Kyoichi Watanabe

Gen Takayama

Teruo Segawa

Ryouichi Senbokuya

Hajime Satou

Takamitsu Saito

Kouichi Nemoto

Motoharu Obika

Shiho Inoue

Kenichi Sakai

Tatsuhiro Fukuzawa

Kenji Ohara

Masanori Aoyagi

Kazuki Miyatake

Sohei Suga

Chizuru Matsuyama

Kazuma Tamai

Yasuo Ohta

Hirotatsu Kamimura

Naoto Kiriu

Masaaki Suzuki

Masanobu Sato

Hiroshi Amano

Shigeo Ibuka

Satoru Ichikawa

Atsushi Takano

Hiroshi Miyakubo

Yasuhiro Yanagihara

Hayato Nagakura

Kyouichi Watanabe

Tomoyuki Shiratsuchi

Yasuhito Miyazaki

Kazuyuki Sakamoto

Kosuke Hagiyama

Eiji Minegishi

Taketo Kaneko

Tomoya Kubota

Yasutaka Nakamura

Takahiro Iwasaki

Naoto Suzuki

Junji Katamura

Shigeo Watanabe

Kenji Hamada

Hironobu Shimosawa

Yamamura Yuichiro

Keiji Ogino

Ohtani Yoshihiko

Oasamu Shimamura

Hiroto Okabe

Hedeaki Horie

Yanagihara Yasuhiro

Miyatake Kazuki

Yoshihiko Ohtani

A deterioration degree estimation device includes an internal resistance detection unit, a deterioration management unit and a deterioration degree estimation unit. The internal resistance detection unit detects an internal resistance of a battery. The deterioration management unit manages a cycle deterioration of the battery. The deterioration degree estimation unit estimates a deterioration degree of the battery as an estimated deterioration degree based on an increase rate of the internal resistance. The deterioration degree estimation unit estimates the estimated deterioration degree such that the estimated deterioration degree decreases as the cycle deterioration increases, or such that the estimated deterioration degree increases as the cycle deterioration degree decreases.

Deterioration degree estimation device and deterioration degree estimation method

A secondary battery charger system in which a chargeable power is calculated on the basis of a difference between a charging target voltage and a cell voltage using a charging control unit that controls a charger used to charge a secondary battery, the secondary battery charger system including a charging threshold voltage setting unit configured to set the charging target voltage to be lower than a charging limitation voltage which is an upper limitation of the cell voltage allowable in design. The charging control unit stops the charging if a predetermined charging stop condition is satisfied while the cell voltage exceeds the charging target voltage and is lower than the charging limitation voltage.

Secondary battery charging system with allowable voltage zone and method thereof

A battery degradation degree estimation device includes a total degradation degree detection unit configured to detect a present total degradation degree of a battery, a cycle degradation estimation unit configured to estimate a future cycle degradation degree due to charge/discharge of the battery, a storage degradation estimation unit configured to estimate a future storage degradation degree over time inside the battery, and a battery degradation estimation unit configured to estimate a future battery degradation degree on the basis of the present total degradation degree, the future cycle degradation degree and the future storage degradation degree.

Battery degradation degree estimation device and battery degradation degree estimation method

Provided is a bipolar battery current collector that includes a conductive resin layer formed in such a manner as to, when at least part of the conductive resin layer reaches a predetermined temperature, interrupts a flow of electric current through the at least part of the conductive resin layer in a vertical direction thereof. Also provided is a bipolar battery using the current collector. It is possible by the use of the current collector to suppress local heat generation in the bipolar battery and improve the durability of the bipolar battery.

Bipolar battery current collector that contracts to interrupt a flow of electric current in a direction thereof and bipolar battery

A battery deterioration degree estimating apparatus includes a storage deterioration degree estimator that estimates the storage deterioration degree of the battery in reuse based on the storage deterioration degree of the battery in the in-vehicle period and the load information of the battery in reuse, the cycle deterioration degree estimator that estimates the cycle deterioration degree of the battery in reuse on the basis of the load information of the battery in reuse, and the total-deterioration-degree at secondary-use-start calculator that calculates the total deterioration degree of the battery at the time point of reuse start. The battery deterioration degree estimating apparatus includes the total-deterioration-degree detector that estimates the total deterioration degree of the battery after the reuse start on the basis of the storage deterioration degree in reuse, the cycle deterioration degree in reuse, and the total deterioration degree of the battery at the time point of the reuse start.

Battery deterioration degree estimating apparatus and estimating method

A charge control device that charges a battery to a predetermined charging rate using an output power from a charger includes a charger control means that controls the output power of the charger based on a first map indicative of the relationship of the charge power with respect to the state of the battery and the charge time of the battery, and an allowable charge time calculation means that calculates the allowable charge time of the battery charge time. The charge control device refers to the first map for calculating the charge power with which to charge the battery in the allowable charge time, and controls the output power of the charger according to the charge power calculated based on the allowable charge time.

Charge control device and charge control method

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

A battery main body housed in a case comprises one laminated body composed of a plurality of bipolar electrodes laminated with an electrolyte layer therebetween or comprises a plurality of laminated bodies connected in series. A positive electrode current collecting plate and a negative electrode current collecting plate each having one surface joined to the inner peripheral surface of the case and the other surface joined to one end of the battery main body respectively extend to the outside of the case. By providing a cutoff mechanism for cutting off an electrical connection between the positive electrode current collecting plate and the negative electrode current collecting plate via the battery main body according to an expansion deformation of the case, a current path in a bipolar secondary battery is interrupted when the short-circuit current occurs, thereby protecting the bipolar secondary battery from a short-circuit current.

Bipolar secondary battery

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 current collector for a nonaqueous solvent secondary battery, which includes: a first metal layer; and a second metal layer stacked on a surface of the first metal layer, is composed so that a Young's modulus (E), Vickers hardness (Hv) and thickness (T) of the first metal layer and a Young's modulus (E), Vickers hardness (Hv) and thickness (T) of the second metal layer can satisfy the following Expression:(1&#x3e;2 or1&#x3e;2); and1&#x3c;2.

Current collector for nonaqueous solvent secondary battery, and electrode and battery, which use the current collector

A bipolar secondary battery comprises laminated bodies. The laminated body comprises bipolar electrodes laminated via an electrolyte layer. The bipolar electrode comprises a positive electrode active material layer and a negative electrode active material layer formed on surfaces of a current collector. A positive electrode is formed on one end of the laminated bodies and a negative electrode is formed on another end. A temperature sensitive resistor having a smaller area than an electrical reaction area of the positive electrode active material layer and the negative electrode active material layer is arranged between the positive electrode and the negative electrode of a pair of adjacent laminated bodies, thereby suppressing a temperature increase caused by a high current by increasing the resistance in response to the flow of the high current into the bipolar secondary battery such as when an external circuit is shorted.

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

A bipolar secondary battery has a battery element that includes first and second bipolar electrodes each having a collector disposed with a conductive resin layer containing a first resin as a base material and positive and negative electrode active material layers formed on opposite sides of the collector and a separator containing a second resin as a base material, arranged between the first and second bipolar electrodes and retaining an electrolyte material to form an electrolyte layer. The positive electrode active material layer of the first bipolar electrode, the electrolyte layer and the negative electrode active material layer of the second bipolar electrode constitute a unit cell. A melting point of the first resin is lower than or equal to a melting point of the second resin. Outer peripheries of the collectors of the first and second bipolar electrodes and an outer periphery of the separator are fused together to thereby seal an outer peripheral portion of the unit cell.

Bipolar secondary battery and method for producing the same

An electrode includes a collector formed with a conductive resin layer and an active material layer formed on the conductive resin layer. The active material layer comprises an active material and a binder polymer, and the conductive resin layer is bonded by thermal fusion bonding to the active material layer.

Electrode and production method thereof

When a bipolar battery is manufactured, a bipolar electrode and a separator are prepared first. Then, one electrode (for example, a positive electrode) out of positive and negative electrodes is applied with such an amount of electrolyte as being exposed on a surface of the one electrode. Then, the separator is arranged on the surface of the one electrode applied with the electrolyte, thus forming a sub-assembly unit. Then, a plurality of the sub-assembly units are layered, and the electrolyte applied to the one electrode is made to permeate through the separator to the other electrode, thus forming an assembly unit.

Bipolar battery manufacturing method, and bipolar battery

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Yokosuka, Japan

Kenji Hosaka