(19)

(11)

EP 1 228 550 A1

(12)

(43) Date of publication: 07.08.2002 Bulletin 2002/32 (21) Application number: 00964390.9 (22) Date of filing: 19.09.2000

(51) International Patent Classification (IPC)7: H01M 10/48, G01N 27/26, G01N 27/22 (86) International application number: PCT/GB0003/583 (87) International publication number: WO 0122/521 (29.03.2001 Gazette 2001/13)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 21.09.1999 GB 9922142 (71) Applicant: Qinetiq Limited London, SW1 6TD (GB)	(72) Inventors: GREEN, Kevin, JamesIPD2C103, East court Hants PO17 6AD (GB) LEVER, Nicholas, David, JamesIPD2C103 East Court Hants PO17 6AD (GB) (74) Representative: Lowther, Deborah  D/IP QinetiQ Formalities,A4 Bldg,Ively Road Farnborough,Hampshire GU14 0LX Farnborough,Hampshire GU14 0LX (GB)