US 6,673,129 B2Granted

Method of manufacturing a lithium battery

AssigneeKoninklijke Philips Electronics N.V.

InventorsMartinus Jacobus Johannes Hack, Hans Feil

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Abstract

Disclosed is a method of manufacturing a lithium battery having a stack of a negative electrode, a separator, and a positive electrode. A pattern of holes is produced in the negative electrode as well as in the positive electrode. A polymeric material is applied on at least one side of the stack and the stack is subjected to heat and pressure, so that the polymeric material penetrates the holes, whereby components are stuck and pressed together. The polymeric material includes bulges which are at least partially located at the ends of holes in the electrode (s). The provision of such bulges of polymeric material makes enough polymeric material available to fill the holes and stick together the electrodes and the separator, while on the outer sides of the stack, in between the holes, the polymeric material can be very thin or even be absent.

Claims11

Dependent claims

A method of manufacturing a lithium battery comprising a stack of a negative electrode, a separator, and a positive electrode, which method comprises the steps of applying negative electrode material on a negative current collector so as to form the negative electrode, applying positive electrode material on a positive current collector so as to form the positive electrode, and arranging a separator between the negative electrode and the positive electrode, and which method further comprises the following steps:

a) producing a pattern of holes in the negative electrode;
b) producing a pattern of holes in the positive electrode;
c) applying a polymeric material on at least one side of the stack and subjecting the stack and the polymeric material to heat and pressure, so that the polymeric material penetrates the holes, whereby the negative electrode, the positive electrode and the separator are stuck and pressed together, wherein prior to said subjecting act, the polymeric material comprises bulges which are partially located in the holes of at least one of the negative electrode and the positive electrode and do not completely fill the holes of at least one of the negative electrode and the positive electrode.

Dependencies are inferred from the claim text.

Facts

Application: 09/795,018Filed 28 Feb 2001
Priority: EP 002007613 Mar 2000
Published: US 2001/0038944 A18 Nov 2001
Granted: 6 Jan 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H01M 50/46
Separators; Membranes; Diaphragms; Spacing elements inside cells: separators, membranes or diaphragms characterised by their combination with…
H01M 50/121
Characterised by the material: organic material
H01M 50/133
Characterised by physical properties, e.g. gas permeability, size or heat resistance: thickness
H01M 6/16
Cells with non-aqueous electrolyte: with organic electrolyte