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:
Oct. 18, 2022
Filed:
Dec. 20, 2020
Contemporary Amperex Technology Co., Limited, Ningde, CN;
Contemporary Amperex Technology Co., Limited, Ningde, CN;
Abstract
The present disclosure provides a negative current collector (), a negative electrode plate (), an electrochemical device, and an apparatus. The negative current collector () includes a support layer, and a conductive layer () disposed on at least one of two opposite surfaces of the support layer () in a thickness direction of the support layer; wherein the support layer () has a smaller density than the conductive layer (); the conductive layer () has a thickness Dsatisfying 300 nm≤D≤2 μm, preferably 500 nm≤D≤1.5 μm; and when the negative current collector () has a tensile strain of 1.5%, the conductive layer () has a sheet resistance growth rate T satisfying T≤5%.