Toyota Jidosha Kabushiki Kaisha

Texas Instruments Corporation

Prime Planet Energy & Solutions, Inc.

Panasonic Holdings Corporation

Sensata Technologies, Inc.

Sensata Technologies Massachusetts, Inc.

Hideki Sano

Koji Takahata

Kaoru Inoue

Hiroki Iguchi

Hiroya Umeyama

Hideaki Fujita

Yukiyoshi Ueno

Tatsuya Hashimoto

Kiyokazu Ikeya

Akihiro Taniguchi

Hiromichi Kimura

Yukihiko Ideshio

Yusuke Fukumoto

Tomohito Ono

Hiroaki Ebuchi

Yuji Yokoyama

Kiwamu Kobayashi

Hirotatsu Kitabatake

Kouhei Tsuzuki

Hideyuki Takahashi

Naoki Wakamatsu

Daisuke Nishide

Naoto Onodera

Azusa Nakanishi

Hiroki Kondo

Tomohiro Nakano

Keiichi Takahashi

Yoshihito Kanno

Naoyuki Wada

Shigeki Matsuta

Junko Ohira

Tomoyuki Mizuno

Yoshiyuki Ozaki

Hideyuki Saka

Toshihiko Mitsuhashi

Hajime Konishi

Kunimitsu Yamamoto

Tomohide Sumi

Satoshi Goto

Toyokazu Ezura

Masao Tohyama

Akira Kohyama

Hiroyuki Abe

Yasushi Ishikawa

Yasuhisa Tsukada

Provided is a technique for preventing plastic deformation of a battery case due to restraint during initial charging. A manufacturing method disclosed herein is a manufacturing method of a non-aqueous electrolyte solution secondary battery. This method includes assembling to construct a secondary battery assembly, and initial charging of the secondary battery assembly. In the initial charging, the initial charging is started with the secondary battery assembly restrained or not restrained; when a negative electrode potential of the secondary battery assembly reaches 0.6 V, a restraint force P1 is applied to the secondary battery assembly, wherein the restraint force P1 is greater than a restraint force applied before the negative electrode potential reaches 0.6 V; and the restraint force P1 is applied to the secondary battery assembly until the negative electrode potential reaches at least 0.3 V.

Non-aqueous electrolyte solution secondary battery and manufacturing method of non- aqueous electrolyte solution secondary battery

Provided is a technology capable of improving the impregnation efficiency of an electrolyte into an electrode body. In accordance with a preferable one embodiment of a method for manufacturing a secondary battery herein disclosed, a method for manufacturing a secondary battery including an electrode body, an electrolyte, and a battery case is provided. The manufacturing method includes a solution introducing step of introducing the electrolyte into the battery case, and a pressure reducing step of reducing the pressure in the battery case after the solution introducing step. After an elapse of 10 hours or more after the solution introducing step, the pressure reducing step is carried out.

Method for manufacturing secondary battery

Provided is a technique for suppressing the formation of black regions in a wound electrode body. The production method disclosed herein is a method for producing a non-aqueous electrolyte secondary battery that includes a wound electrode body, a non-aqueous electrolyte, and a battery case. This production method includes the following steps: an assembling step Sof placing the wound electrode body and the non-aqueous electrolyte in the battery case to construct a secondary battery assembly; a first step Sof performing initial charging on the secondary battery assembly; and a second step Sof setting the temperature of the wound electrode body to 50° C. or lower and keeping this state for at least 72 hours after the first step.

Non-aqueous electrolyte secondary battery and method for producing non-aqueous electrolyte secondary battery

A secondary battery module includes a nonaqueous-electrolyte secondary battery and an elastic body, wherein a negative electrode constituting the nonaqueous-electrolyte secondary battery includes a negative-electrode active material layer, the negative-electrode active material layer includes a first layer, and a second layer that is formed on the first layer and has a higher compression modulus than the first layer, a separator constituting the nonaqueous-electrolyte secondary battery has a lower compression modulus than the first layer, the elastic body has a lower compression modulus than the separator, the graphite particles contained in the first layer have a BET specific surface area of 1 to 2.5 m/g, and the content of Si particles in the first layer is 6 mass % to 13 mass % relative to the total amount of the negative-electrode active material layer.

Nonaqueous-electrolyte secondary battery and secondary battery module

A secondary battery module according to the present embodiment includes a nonaqueous-electrolyte secondary battery and an elastic body, wherein a negative electrode constituting the nonaqueous-electrolyte secondary battery includes a negative-electrode current collector and a negative-electrode active material layer, the negative-electrode active material layer includes a first layer formed on the negative-electrode current collector, and a second layer that is formed on the first layer and has a higher compression modulus than the first layer, a separator constituting the nonaqueous-electrolyte secondary battery has a lower compression modulus than the first layer, the elastic body has a lower compression modulus than the separator, a graphite particles contained in the first layer have a BET specific surface area of 1 to 2.5 m/g, and the first layercontains 0.01 mass % to 0.4 mass % of a carbon nanotube having one to five graphene sheets.

An electrolyte solution for a lithium-ion battery is provided. The electrolyte solution contains at least a solvent and a lithium salt. The lithium salt is dissolved in the solvent. The solvent contains acetic anhydride at a concentration not lower than 80 vol %.

Electrolyte solution and lithium-ion battery

A non-aqueous electrolyte secondary battery includes: a pressure-type current interrupt device arranged in a conductive path, for interrupting the conductive path when an internal pressure exceeds a working pressure; a non-aqueous electrolyte; and a positive electrode composite material layer. The non-aqueous electrolyte contains a gas generation agent that generates a gas in an overcharge region, and the positive electrode composite material layer contains a first positive electrode active material particle including lithium iron phosphate, and a second positive electrode active material particle including lithium-nickel composite oxide. A ratio of the first positive electrode active material particle to a total mass of the first positive electrode active material particle and the second positive electrode active material particle is 5% by mass or more and 20% by mass or less.

Non-aqueous electrolyte secondary battery

An electrolyte solution for a lithium-ion battery is provided. The electrolyte solution contains at least a solvent and a lithium salt. The solvent contains at least methoxyacetone.

An electrolyte solution is used for a lithium ion battery. The electrolyte solution contains at least a solvent and lithium salt. The solvent contains at least methoxymethyl formate.

Electrolyte solution and lithium ion battery

A method of producing a lithium ion secondary battery includes preparing a case in which an electrode group including at least a positive electrode and a negative electrode is accommodated; impregnating a first electrolyte solution into the electrode group, lowering a potential of the negative electrode to a first potential, injecting FEC into a case, and lowering a potential of the negative electrode to a second potential. The negative electrode contains at least graphite and silicon oxide. The first electrolyte solution does not contain FEC. An additive has a reductive decomposition potential of 0.5 V (vs. Li/Li) or more and 1.5 V (vs. Li/Li) or less. The first potential is higher than 0.2 V (vs. Li/Li) and is equal to or lower than the reductive decomposition potential. The second potential is 0.2 V (vs. Li/Li) or less.

Method of producing lithium ion secondary battery

A nonaqueous electrolyte secondary battery includes a wound electrode assembly in which a positive electrode having, at its one end in a width direction, a positive electrode exposed portion provided without a positive electrode mixture layer on a positive electrode current collector and a negative electrode are wound together, with a separator interposed therebetween. The positive electrode exposed portion protrudes outward in an axial direction of the wound electrode assembly relative to the separator and the negative electrode at one end in the axial direction of the wound electrode assembly. The negative electrode exposed portion protrudes outward in the axial direction of the wound electrode assembly relative to the separator and the positive electrode at the other end in the axial direction. The positive electrode exposed portion has a cutout portion at least in an outermost circumferential portion of the positive electrode.

Nonaqueous electrolyte secondary battery and method of manufacturing the same

A surface-mountable socket has a wiping function. A socketof the present technology can be surface-mounted to a board. The socketincludes a plurality of contacts, and each contactincludes a contact portionthat can contact a terminal of a semiconductor device, a locking portionconnected to the contact portion, and a board-side contact portionthat extends from the locking portionand can contact a conductive region formed on a board surface. The socketfurther includes a stopper memberthat holds the locking portionof the plurality of contactsand a guide memberthat is disposed so as to oppose the stopper member, and the guide memberis formed with a plurality of through holesthat houses a board-side contactprotruding from the stopper member.

Socket

There is provided a method of manufacturing a non-aqueous electrolyte secondary battery equipped with a wound electrode body that is formed by laminating and winding a positive electrode, a negative electrode, and a separator. This method includes preparing the wound electrode body including an uncoated portion of positive electrode active material layers and an uncoated portion of negative electrode active material layers, and not forming the positive electrode active material layers on at least a surface of a positive electrode current collector on a winding outer peripheral side thereof in a region that includes at least an outermost periphery of the positive electrode; structuring the secondary battery by accommodating the wound electrode body in a battery case; and subjecting the secondary battery to an aging treatment in which the secondary battery is retained within a temperature range that is equal to or higher than 60&#xb0; C.

Method of manufacturing non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery

A lithium-ion secondary battery () includes a wound electrode body (), a nonaqueous electrolyte, and a box-shaped case (). The wound electrode body includes a positive electrode (), a negative electrode (), and a separator (). The box-shaped case contains the wound electrode body and the nonaqueous electrolyte. The wound electrode body includes a starting-end-side negative electrode remainder portion () provided in a winding-direction starting end portion () of the wound electrode body. The winding-direction starting end portion exists at a winding center side. The starting-end-side negative electrode remainder portion protrudes toward the winding center side along a winding direction beyond the positive electrode. A surplus nonaqueous electrolyte exists in a gap between the wound electrode body and the box-shaped case. The starting-end-side negative electrode remainder portion is positioned in a region where the surplus nonaqueous electrolyte exists, when the lithium-ion secondary battery is disposed in a predetermined posture.

Lithium-ion secondary battery and manufacturing method thereof

Provided is a nonaqueous electrolyte secondary battery in which the following are housed in a battery case: a nonaqueous electrolyte, a boron atom-containing oxalato complex compound, and an electrode assembly in which a positive electrode having a positive electrode active material and a negative electrode having a negative electrode active material are disposed facing each other. Here, a coat containing boron atoms originating from the oxalato complex compound is formed on the surface of the negative electrode active material, and the amount B(&#x3bc;g/cm) of the boron atom as measured based on inductively coupled plasma-atomic emission spectroscopic analysis and the intensity Bfor a tricoordinate boron atom as measured based on x-ray absorption fine structure analysis satisfy 0.5&#x2264;B/B&#x2264;1.0.

Nonaqueous electrolyte secondary battery

Growing community of inventors

Ikeda, Japan

Hideki Sano