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:
Nov. 28, 2023
Filed:
May. 08, 2023
Contemporary Amperex Technology Co., Limited, Ningde, CN;
CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde, CN;
Abstract
A secondary battery, including a positive electrode, a negative electrode, a separator sandwiched between the positive electrode and the negative electrode, and an electrolyte are provided. In some embodiments, the positive electrode includes a positive electrode current collector having two main surfaces, the negative electrode includes a negative electrode current collector having two main surfaces, and at least one of the positive electrode current collector and the negative electrode current collector includes at least one recess structure extending from at least one main surface into interior of the current collector, where the recess structure has a recess depth hin microns, the electrolyte has a conductivity σ in Siemens/meter, and numerically, σ and hsatisfy the following relationship: 8tanhh0.2≤σ≤10tanh(h)+2+0.1. This application further provides a battery module including the foregoing secondary battery, a battery pack, and an electric apparatus.