Ditto that on all accounts - precisely the same experience, completely different battery. Ken Javor
Phone: (256) 650-5261 > From: "Price, Edward" <ed.pr...@cubic.com> > Date: Wed, 5 Aug 2009 09:45:14 -0700 > To: <EMC-PSTC@LISTSERV.IEEE.ORG> > Conversation: [PSES] Li-ion Question > Subject: RE: [PSES] Li-ion Question > > A few years ago, my company bought smart Lithium batteries for a > man-worn electronics pack. These batteries were about 6" wide by 8" tall > by 2" thick. These batteries we so smart that they had a built-in > microprocessor in each battery. We found that the microprocessor > radiated from the internal battery leads. Further, the battery had to > withstand 50 V/M. The batteries failed spectacularly, showing strong > polarization effects caused by pickup of sensor leads buried in the > battery packs which transferred RF right into the microprocessors. For a > while, it was like testing fuses, as I destroyed 16 out of the first 17 > test samples. > > So yes, I'll agree that the smart batteries can be a problem for both > radiated emission and immunity. > > > Ed Price > ed.pr...@cubic.com WB6WSN > NARTE Certified EMC Engineer > Electromagnetic Compatibility Lab > Cubic Defense Applications > San Diego, CA USA > 858-505-2780 > Military & Avionics EMC Is Our Specialty > > >> -----Original Message----- >> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf >> Of Leber, Jody (San Diego) >> Sent: Wednesday, August 05, 2009 9:25 AM >> To: rehel...@mmm.com; EMC-PSTC@LISTSERV.IEEE.ORG >> Subject: RE: [PSES] Li-ion Question >> >> Bob, >> >> The CE marking would likely be based on the EMC directive >> since the circuitry may be sensitive to ESD. The battery >> normally will be under the voltage limits of the LVD. It is >> not uncommon in the industry to test the packs and cells to >> EN 62133 in addition to ESD and RF Immunity. >> If the battery is to be used in a medical application the end >> product vendor will probably request even more EMC/EMI tests. >> >> Currently for an end product to receive a CB Scheme >> Certificate any batteries used must be tested to IEC 62133. >> >> In my opinion, the cells alone should not be marked but >> batteries (cells with circuitry typically in an enclosure) >> usually will be, especially if they are serviceable by the operator. >> >> Best Regards, >> >> Jody Leber >> >> SGS Consumer Testing Services >> >> Manager, Battery Test Certification Program >> >> >> SGS - U. S. Testing Company, Inc. >> >> 16870 West Bernardo Drive, Suite 250 >> San Diego, CA 92127 USA >> >> Phone: 678.469.9835 >> Fax: 858.592.7107 >> E-mail: jody.le...@sgs.com >> >> >> >> >> -----Original Message----- >> From: Robert Heller [mailto:rehel...@mmm.com] >> Sent: Wednesday, August 05, 2009 11:25 AM >> To: EMC-PSTC@LISTSERV.IEEE.ORG >> Subject: [PSES] Li-ion Question >> >> An off-the-wall question. It is my understanding that all >> Lithium Ion batteries (or other smart batteries) have digital >> circuitry in the for monitoring over-temp, etc during the >> recharging process. Do these batteries need to carry a CE >> marking because of this circuitry? >> >> Bob Heller >> St. Paul, MN 55107-1208 >> Tel: 651- 778-6336 >> >> - > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to that URL. > > Website: http://www.ieee-pses.org/ > Instructions: http://listserv.ieee.org/request/user-guide.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <emcp...@socal.rr.com> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@socal.rr.com> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
