Invention Grant
- Patent Title: Lithium battery separator having a shutdown function
- Patent Title (中): 具有关机功能的锂电池隔膜
-
Application No.: US10524145Application Date: 2003-07-08
-
Publication No.: US07691528B2Publication Date: 2010-04-06
- Inventor: Volker Hennige , Christian Hying , Gerhard Hoerpel
- Applicant: Volker Hennige , Christian Hying , Gerhard Hoerpel
- Applicant Address: DE Duesseldorf
- Assignee: Degussa AG
- Current Assignee: Degussa AG
- Current Assignee Address: DE Duesseldorf
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: DE10238945 20020824
- International Application: PCT/EP03/07335 WO 20030708
- International Announcement: WO2004/021469 WO 20040311
- Main IPC: H01M2/16
- IPC: H01M2/16 ; H01M2/14

Abstract:
Electrical separators for batteries, especially lithium batteries, having a shutdown mechanism. A process for their production. An electrical separator is used in batteries and other systems in which electrodes have to be separated from each other while maintaining ion conductivity. Safety is very important in lithium batteries, since in contrast to other types of battery(Pb, NiCd, NiMeH) the solvent for the electrolyte is not water but a combustible solvent. A separator for lithium cells must possess a shutdown mechanism while not to be able to melt down. This is achieved by an electrical separator having a shutdown layer which consists of particles which melt at a desired temperature, close the pores of the separator, and so stop ion flow. Since the separator also comprises a porous inorganic (ceramic) layer on a carrier, the cells cannot melt down as a result of a completely melted separator.
Public/Granted literature
Information query