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:
Feb. 18, 2025
Filed:
Mar. 31, 2020
Ningde Amperex Technology Limited, Fujian, CN;
NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde, CN;
Abstract
An electrochemical apparatus includes an electrolyte, a positive electrode and a negative electrode, the negative electrode includes a negative active material layer, the negative active material layer includes a negative active material, the electrolyte includes fluoroethylene carbonate, and the electrochemical apparatus satisfies the following relational expressions: 0.5<R/R<1.5 and both Rand Rare less than 35 milliohms, and 0.005≤A/B≤0.1; where Rrepresents a charge transfer resistance under 50% state of charge at 25 degrees Celsius, and Rrepresents a concentration polarization resistance in the 50% state of charge at 25 degrees Celsius; a mass of the fluoroethylene carbonate corresponding to 1 g of the negative active material is A g, and a specific surface area of the negative active material is B m/g. This application aims to improve the fast charging performance of the electrochemical apparatus while maintaining the cycle performance thereof.