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A non-aqueous electrolyte rechargeable battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode has a sodium concentration of greater than 532 ppm and less than 71100 ppm. The non-aqueous electrolyte rechargeable battery includes a LiBOB equivalent. The LiBOB equivalent is lithium bis(oxalato)borate in the non-aqueous electrolyte or a substance formed when the lithium bis(oxalato)borate reacts with another substance. The non-aqueous electrolyte has a hypothetical concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate.

Titel:	NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY AND METHOD FOR MANUFACTURING NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY
Link:	View record in USPTO Patent Applications (Volltext)
Veröffentlichung:	2024
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20240088441 Publication Date: March 14, 2024 Appl. No: 18/243595 Application Filed: September 07, 2023 Assignees: PRIMEARTH EV ENERGY CO., LTD. (Kosai-shi, JP), TOYOTA JIDOSHA KABUSHIKI KAISHA (Toyota-shi, JP), PRIME PLANET ENERGY & SOLUTIONS, INC. (Tokyo, JP) Claim: 1. A non-aqueous electrolyte rechargeable battery, comprising: a positive electrode; a negative electrode; and a non-aqueous electrolyte, wherein the negative electrode has a sodium concentration of greater than 532 ppm and less than 71100 ppm, the non-aqueous electrolyte rechargeable battery includes a LiBOB equivalent, the LiBOB equivalent is lithium bis(oxalato)borate in the non-aqueous electrolyte or a substance formed when the lithium bis(oxalato)borate reacts with another substance, and the non-aqueous electrolyte has a hypothetical concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate. Claim: 2. The non-aqueous electrolyte rechargeable battery according to claim 1, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer has a density of 1.14 grams per cubic centimeter or greater. Claim: 3. The non-aqueous electrolyte rechargeable battery according to claim 1, wherein the non-aqueous electrolyte has a viscosity of 3.9 cP or less. Claim: 4. The non-aqueous electrolyte rechargeable battery according to claim 1, wherein the negative electrode has a sodium concentration of 700 ppm or greater. Claim: 5. The non-aqueous electrolyte rechargeable battery according to claim 1, wherein the positive electrode and the negative electrode are rolled with a separator held between the positive electrode and the negative electrode into a rolled electrode body, and the negative electrode in the rolled electrode body has a resistance that increases from an end to a central portion in a direction parallel to a rolling axis. Claim: 6. A method for manufacturing a non-aqueous electrolyte rechargeable battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, the method comprising: obtaining the negative electrode having a sodium concentration that is greater than 532 ppm and less than 71100 ppm; accommodating an electrode body including the positive electrode and the negative electrode in a battery case; and injecting the non-aqueous electrolyte into the battery case, wherein the injected non-aqueous electrolyte includes a LiBOB equivalent, the LiBOB equivalent is lithium bis(oxalato)borate or a substance formed by a reaction of the lithium bis(oxalato)borate with another substance, and the injected non-aqueous electrolyte has a concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate. Claim: 7. The method according to claim 6, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer has a density of 1.14 grams per cubic centimeter or greater. Claim: 8. The method according to claim 6, wherein the non-aqueous electrolyte has a viscosity of 3.9 cP or less. Claim: 9. The method according to claim 6, wherein the negative electrode has a sodium concentration of 700 ppm or greater. Current International Class: 01; 01; 01

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NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY AND METHOD FOR MANUFACTURING NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY