Yes. Heat is going to conduct better through the metal plates of the batter vs the electrolite. Therefore, the heat if generated at the connector is going to conduct along the metal plates. Assuming that the plates in that battery are vertical, I would expect something similar to what is being seen.
Also note that the strap is FAR hotter than the portion of the strap visible at the left edge of the IR image, and that the right end of the strap and the top of the cell on the right that is connected to that strap is also warm. There is a lot of heat being generated in the strap or more likely the connection between the left end of the strap and the top of the battery. We use IR images using similar equipment here at work for checking electrical connections quite regularly. For a little entertainment, a couple years ago I used a thermal imaging camera to demonstrate how hot a lighting controller board got under heavy load. I posted the results on a Christmas Lighting forum. You should be able to read it - although you can't post a reply unless you are a member of that forum. http://forums.lightorama.com/topic/45960-how-warm-does-a-sandevices-e682-get/ Jim -----Original Message----- From: "Peri Hartman via EV" <[email protected]> Sent: Tuesday, October 1, 2019 10:53 To: "Electric Vehicle Discussion List" <[email protected]> Cc: "Peri Hartman" <[email protected]> Subject: Re: [EVDL] LiFePO4 Thermal Imaging Opinions? Wow, hat's a great observation. Question: is it significant that the IR image also shows heat emanating vertically, appearing to be relatively uniform ? Peri ------ Original Message ------ From: "jim--- via EV" <[email protected]> To: "Electric Vehicle Discussion List" <[email protected]> Cc: "[email protected]" <[email protected]> Sent: 01-Oct-19 10:36:24 AM Subject: Re: [EVDL] LiFePO4 Thermal Imaging Opinions? >> A close-up of the cell, looking from the front of the pack. It's been >> photoshopped to blend the IR image with the visible image to provide some >> perspective of the actual appearance: >> >> http://www.westlanetv.org/~sharkey/evgfx/Hot_Cell_2.jpg > >Carefully check the connection on that cell that is closest to the camera. >Note that only the one end of the cell is warmer - not both ends. I would >suspect that the connection is marginal and causing the heat. The heat has >conducted into that end of the cell. > >73 >----- >Jim Walls - K6CCC >[email protected] > > >_______________________________________________ >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >ARCHIVE: http://www.evdl.org/archive/index.html >INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org >Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
