Try an IR-Blue, I have one, and have used it at varying distances. https://www.google.com/search?q=ir-blue
On August 16, 2014 2:13:23 AM CDT, Martin WINLOW via EV <ev@lists.evdl.org> wrote: >Dan, > >You should check the instructions for the laser thermometer - I expect >that, like mine, it recommends a maximum reading distance (from object >of interest to instrument) in single figure inches! MW > > >On 15 Aug 2014, at 02:32, Michael Ross via EV wrote: > >> I am with Jan. >> >> The laser thermometers are averaging over the whole patch you see lit >up >> and they are not hugely accurate because of it. If the patch is >larger >> from being farther away or not circular because it is on an angle - >it will >> not report what you are hoping for. They are best for shining inside >a >> uniform container, oven, furnace, etc. Or if at a wall, then you need >to >> take a series of readings. >> >> Imagine on one terminal you slide off to one side and average in some >> temperature from the top of the battery case. Or you have to get >very >> close to one and far from another, and so on. >> >> Can you share what make and model of thermometer you are using? >> >> Mike >> >> >> On Thu, Aug 14, 2014 at 7:21 PM, David Nelson via EV ><ev@lists.evdl.org> >> wrote: >> >>> If this is a change then I would investigate. I have had my pack in >>> for over 4 years and have not had the issue you and others have had >>> and my pack isn't exactly closed to moisture and dust. I have 40 >>> TS-LFP100AHA cells in a 2p20s arrangement. Because the BMS I used to >>> use attached to the heads of the terminal bolts I used brass bolts >>> since they are much easier to drill and tap threads in. This also >>> meant that I could assemble the pack and torque the bolts >independent >>> of the BMS connections so they could not interfere with any >>> connections. Before assembling my pack I wire brushed all the >>> terminals to shine them up. I did this with NOALOX on the terminals >>> and SS wire brush so that the NOALOX would seal the metal as soon as >>> possible. I also tapped all the terminal holes again, using NOALOX >on >>> the tap though this was probably way overkill. I did find some >>> terminals that didn't get tapped all the way down. I then put NOALOX >>> on the bolt threads before assembling. This was mostly so that the >>> soft Al and Cu terminals wouldn't gall up at all. I used bronze lock >>> washers, too. I have had no terminals come loose or get warm. >>> >>> Some may say that what I did was a waste of time but they can't >>> counter the results. It just works and I'm glad. LiFePO4 has been >much >>> simpler than lead acid in many ways. If I were you I would clean all >>> the terminals using a similar process. If I were to do it over, and >I >>> have on small 4-8 cell packs, I would use NO-OX-ID "A SPECIAL" >because >>> it doesn't seem to get sticky over time like the NOALOX does. >>> >>> On Wed, Aug 13, 2014 at 2:20 PM, Danpatgal via EV ><ev@lists.evdl.org> >>> wrote: >>>> I am using 38x130 ah CALBs in my Lectric Leopard and have had a too >hot >>> (> >>>> 40C) warning on my BMS come on a few times in the last month or so. >>> Today, >>>> after a longer stretch of accelerating uphill to home, I checked >some of >>> the >>>> battery posts. Measuring with a laser sensor, several of them were >>> around >>>> 33C , in a grouping, maybe 6 or 8 posts adjacent on the most >positive >>> side >>>> of my pack. Posts just a few cells more negative were much cooler, >maybe >>>> around 26C or cooler. >>>> >>>> I checked the bolts to make sure they were tight, and didn't notice >any >>> real >>>> problem with the connections being loose. My only other thought is >that >>>> perhaps (as has been discussed in other threads), these connections >have >>>> corroded over time ... adding a little resistance layer (I didn't >>> initially >>>> polish or use Noalox on those) that is now finally heating up. I >am also >>>> using the original copper straps with steels M8 bolts. >>>> >>>> Are others noticing this kind of heat with the lithium cell >terminals? >>>> Aside from just cleaning the terminals and putting on some Noalox, >might >>>> there be other things to do? I installed these in Sep. 2012, so >they are >>>> not quite two years in service. >>>> >>>> Thanks - Dan >>>> > >_______________________________________________ >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >http://lists.evdl.org/listinfo.cgi/ev-evdl.org >For EV drag racing discussion, please use NEDRA >(http://groups.yahoo.com/group/NEDRA) -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140816/bd59f6e5/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
