Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Koichi Takeshita

Tatsuya Shinoda

Nobuyasu Negishi

Tatsuya Hashimoto

Yasuaki Murashi

Koichi Kawamura

Naoki Iwamura

Masanori Tanaka

Makoto Kobayashi

Masahiro Murata

Hirokiyo Mamyoda

According to one embodiment, a battery includes an external container, an electrode group, and a sealing plate. The electrode group includes a positive electrode and a negative electrode wound in a flat shape with an insulating layer interposed therebetween. Thicknesses Tof the positive and negative electrodes are each from 0.03 mm to 0.08 mm. A first direction is orthogonal to a winding axis direction of the electrode group. A second direction is parallel to the winding axis direction. The thicknesses Tof each electrode, a thickness Tof the electrode group in the third direction orthogonal to the first and second directions, and an innermost circumferential height Hof the electrode group in the first direction satisfy 0.02≤(T×T)/H≤0.04.

Battery and battery pack

According to one embodiment, a battery is provided. The battery includes an electrode body, a lead, a container member, and a terminal. The container member includes a main part and a terminal-connecting part adjacent to the main part. The electrode body is housed in the main part of the container member. The lead is electrically connected to the electrode body. The lead is housed in the terminal-connecting part of the container member. The terminal is electrically connected to the lead. The terminal is provided on the terminal-connecting part. A thickness of the main part of the container member is larger than a thickness of the terminal-connecting part of the container member.

Battery and battery module

According to an embodiment, an electrode is provided. The electrode group includes a stack. The stack includes a positive electrode, a negative electrode or negative electrodes, and separator. Each negative electrode includes a negative electrode current collector and a negative electrode layer provided on the negative electrode current collector. The electrode group satisfies following relational formulae (I) to (III): 10&#x2264;a/b&#x2264;16 (I); 0.7&#x2264;D/E&#x2264;1.4 (II); E&#x2264;85 (III). Here, the a[mm] is a thickness of the stack. The b[mm] is a thickness of the negative electrode current collector, or is a total thickness of the negative electrode current collectors. The D[&#x3bc;m] is a thickness of the positive electrode. The E[&#x3bc;m] is a thickness of the negative electrode.

Wound electrode group, electrode group, and nonaqueous electrolyte battery

According to one embodiment, a battery includes a flat-shaped electrode group, a package member and a terminal section. The package member includes a stainless steel-made first package having a flange at an opening and a stainless steel-made second package. The electrode group is stored in a space formed by welding the flange of the first package to the second package. The terminal section includes a through-hole that is open to the first package, a ring-shaped rising portion that extends from a periphery of the through-hole toward an inside of the package member, a ring-shaped member that is arranged on an outer surface of the rising portion, an insulation gasket, and an external terminal. The external terminal is fixed to the first package by caulking.

A secondary battery according to one embodiment includes, an electrode group which is a cathode and an anode wound with a separator being interposed therebetween, a first lead having a first welding surface, a second lead having a second welding surface which is bent with respect to a winding axial direction of the electrode group, a first current collecting tab which is extended from one end of the electrode group on the winding axial direction, and welded onto the first welding surface of the first lead, a second current collecting tab which is extended from the other end of the electrode group on the winding axial direction, and welded onto the second welding surface of the second lead, a first terminal connected to the first lead, and a second terminal connected to the second lead.

Growing community of inventors

Kashiwazaki, Japan

Koichi Takeshita