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:
Mar. 15, 2011
Filed:
Oct. 27, 2004
Chuanfu Wang, Shenzhen, CN;
Xi Shen, Shanghai, CN;
Chuanfu Wang, Shenzhen, CN;
Xi Shen, Shanghai, CN;
BYD Company Limited, Shenzhen, CN;
Abstract
A type of lithium ion secondary battery is disclosed; therein, the positive electrodeis formed by smearing an active material on the surface of an aluminum foil body, where said active material is compound oxide(s) comprising transition metals and lithium capable of absorbing and releasing lithium ions; the negative electrodeis formed by smearing an active material on the surface of a copper foil body, where said active material includes carbon material capable of absorbing and releasing lithium ions. Both the positive and negative electrodes have conducting strips acting as current conductors. The positive and negative electrodesare in plate form and are alternately stacked on both sides of the belt-shaped separatorto form the electrode core. The separatorwraps around said electrode plates and separates the positive and negative electrodes. This type of lithium ion secondary battery can effectively use the internal space of a battery shell, increase the battery's energy density, improve the large current discharge characteristic of the lithium ion secondary battery, the self-discharge ability, the battery's cycling capability and the battery's capacity.