The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2021
Filed:
Apr. 29, 2021
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Hideyuki Saka, Nagoya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A battery assembly disclosed herein is a battery assembly before being subjected to initial charge. In the battery assembly, a positive electrode has a positive electrode mixture layer that contains a positive electrode active material and NMP, and an oxalate complex compound and FSOLi are contained in a nonaqueous electrolyte solution. In the battery assembly disclosed herein, a NMP content in the positive electrode mixture layer is 50 ppm to 1500 ppm, the DBP oil absorption of the positive electrode active material is 30 ml/100 g to 45 ml/100 g, and a FSOLi content in the nonaqueous electrolyte solution is 0.1 wt % to 1.0 wt %. With this, it is possible to prevent a reduction in input-output characteristics caused by formation of a film derived from NMP on the surface of the positive electrode active material, and hence it is possible to prevent an increase in facility cost and a reduction in manufacturing efficiency caused by adjustment of the content of NMP.