Toyota Jidosha Kabushiki Kaisha

Tomoya Mesuda

Kunihiko Hayashi

Tomoyuki Uezono

An electrode plate manufacturing apparatus includes: a first roll; a second roll that consolidates a particle aggregate and forms an undried active material film; and a third roll that transcribes the undried active material film on the second roll onto a current collector foil. A circumferential velocity A of the first roll, a circumferential velocity B of the second roll, a conveyance velocity C of the current collector foil, a contact angle &#x3b1; of the first roll, a contact angle &#x3b2; of the second roll, and a contact angle &#x3b3; of the current collector foil satisfy conditions (i) &#x3b2;&#x2212;&#x3b1;&#x2265;&#x2212;1.6&#xd7;B/A+40 where &#x3b2;&#x2212;&#x3b1;&#x3e;0 and B/A&#x2265;1 and (ii) &#x3b3;&#x2212;&#x3b2;&#x2265;&#x2212;1.6&#xd7;C/B+40 where &#x3b3;&#x2212;&#x3b2;&#x3e;0 and C/B&#x2265;1.

Electrode plate manufacturing apparatus, manufacturing method of positive plate, and manufacturing method of negative plate

A manufacturing method of a lithium ion secondary battery includes: forming a first mixture by mixing powder of a first electrode material, which is one of the active material and the conductive material, with powder of trilithium phosphate; forming a second mixture by mixing the first mixture with powder of a second electrode material which is the other one of the active material and the conductive material; forming a wet granulated body by mixing the second mixture with the binder and a solvent; and forming the active material layer by attaching the wet granulated body to the surface of the current collector foil.

Method of manufacturing lithium ion secondary battery

An electrode production method by which an electrode including an electrode active material layer formed on a surface of a current collecting member is produced includes, when a material having a lower bulk density between an electrode active material and a conductive material is used as a first substance and a material having a higher bulk density is used as a second substance, wetting the first substance with a solvent to prepare a wet substance, performing first mixing in which the wet substance and the second substance are mixed to prepare a preceding mixture, and performing second mixing in which the preceding mixture, a binder, and the solvent are mixed and granulated to prepare a wet granulated substance.

Method of producing an electrode using mixtures

A positive electrode paste for a non-aqueous electrolyte secondary battery is provided. The positive electrode paste includes a binder and a positive electrode active material. The binder includes a resin including polyvinyl acetal as a basic skeleton, the resin having a weight average molecular weight of 50000 to 140000 and having a hydroxyl group content of 42 to 60 mol %; and polyvinylidene fluoride having a weight average molecular weight of 800000 to 1200000.

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Toyota, Japan

Tomoya Mesuda