Apb Corporation

Gunze Limited

Nissan Motor Company Limited

Sanyo Chemical Industries, Ltd.

Ryosuke Kusano

Hideaki Horie

Yasuhiro Tsudo

Yasuhiko Ohsawa

Hiroshi Akama

Hajime Satou

Yuki Kusachi

Shun Kudoh

Kazuaki Onishi

Yusuke Mizuno

Yusuke Nakashima

Yasuhiro Shindo

Kotaro Nasu

Yoshihiro Ikeda

Naoya Omae

Masahiro Uchimaru

Yuki Nekohashi

Sonomi Fukuyama

Yasuji Maruyama

The present invention aims to provide a method for producing a pinhole-free thin resin current collector for negative electrodes. The method for producing a sheet-shaped resin current collector for negative electrodes of the present invention includes stacking three or more layers of melts of conductive resin compositions each containing a polyolefin and a conductive filler to obtain a multilayered body, wherein the polyolefin contained in each of the conductive resin compositions that form the respective layers of the multilayered body has a melt mass flow rate of 15 to 70 g/10 min as measured at a temperature of 230° C. and a load of 2.16 kg in accordance with JIS K7210-1:2014.

Method for producing resin collector for negative electrodes, method for producing negative electrode for lithium ion batteries, and method for producing lithium ion battery

Provided is a lithium-ion assembled battery in which two or more single cells are laminated and the DC resistance value between the single cells is low. The assembled battery has two or more single cells including a laminating unit in which a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector are laminated in order, in the assembled battery, one single cell and the other single cell are laminated such that the positive electrode current collector of the one single cell and the negative electrode current collector of the other single cell are in contact with each other, the positive electrode current collector is made up of a conductive resin layer containing a polyolefin resin (A1) and a conductive carbon filler (B1), the negative electrode current collector is made up of two or more kinds of conductive layers, and the conductive layer disposed on an outer side among the conductive layers in the negative electrode current collector contains the polyolefin resin (A1) and the conductive carbon filler (B1).

Lithium ion assembled battery

A cell system includes: a stacked-type cell module () having a plurality of lithium ion unit cells () being stacked and having through holes () formed therein; a gas supply part (); a cooling liquid supply part (); a temperature sensor (); and a control part () that controls switching between a normal control mode and a high-temperature control mode based on a signal from the temperature sensor (). In the normal control mode, the control part () controls the gas supply part () to supply a gas to the through holes (), and at the same time, controls the cooling liquid supply part () to stop supply of a cooling liquid, and in the high-temperature control mode, the control part () controls the cooling liquid supply part () to supply the cooling liquid to the through holes () to which the gas is supplied, and at the same time, controls the gas supply part () to stop supply of the gas. According to this cell system, the increase in temperature of the cell is suppressed while having a simple configuration with a reduced formation region of through holes provided in a lithium ion cell.

Cell system

A resin current collector provides means for improving the cycle characteristics in a lithium ion battery and includes a polyolefin resin, and a conductive carbon filler. The total surface area of the conductive carbon filler contained in 1 g of the resin current collector is 7.0 mor more and 10.5 mor less.

Resin current collector, multilayer current collector and lithium ion battery

A current collector for a lithium ion battery includes a first conductive resin layer and a second conductive resin layer. The first conductive resin layer includes a first conductive filler. The second conductive resin layer is formed on the first conductive resin layer and includes a second conductive filler. The first conductive filler is a conductive carbon. The second conductive filler contains at least one kind of metal element selected from the group consisting of platinum, gold, silver, copper, nickel, and titanium. A volume % of the second conductive filler in the second conductive resin layer on a first surface side, which is a first conductive resin layer side, is higher than that on the second surface side that is opposite to the first conductive resin layer.

Current collector for lithium ion battery and manufacturing method of the current collector

Growing community of inventors

Kyoto, Japan

Ryosuke Kusano