Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Martin WINLOW via EV
:29:00 PM Subject: Re: [EVDL] CALB bolt terminals getting hot - The cells in the TESLA pack are a group in parallel then the parallel groups are wired in series for the desired voltage, The key to pack survival when a cell fails is a fusible link (Correctly sized short length of wire

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Michael Ross via EV
Dave, I have a pack like that, 16 cells, 48V. It is heavy and not packed tight as it uses the plastic frames available for these cells. But the threaded holes in the stamped end plates seem to be well made and can take real torque. If they are nickel that explains their high cost. I always

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Lee Hart via EV
Jay Summet via EV wrote: The eSamba guy is using a piece of fuse wire to each cell, so that if a single cell shorts out, the fuse wire blows... That's a good plan. Do you know how he tested it, to be sure the fuse wire is sized right to actually work? -- The principal defect in a storage

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Lee Hart via EV
Jay Summet via EV wrote: Why not pressure fit? ...Flashlights do it all the time... Think about how many times you've had bad connections and flickering light, had to shake it or clean the contacts to get it to work. You can make a good electrical connection with pressure alone, but it

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Jay Summet via EV
On 08/20/2014 10:22 AM, Lee Hart wrote: Jay Summet via EV wrote: The eSamba guy is using a piece of fuse wire to each cell, so that if a single cell shorts out, the fuse wire blows... That's a good plan. Do you know how he tested it, to be sure the fuse wire is sized right to actually

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Michael Ross via EV
I believe he also used insulated wire to contain any molten copper beads from getting loose. On Wed, Aug 20, 2014 at 12:29 PM, Jay Summet via EV ev@lists.evdl.org wrote: On 08/20/2014 10:22 AM, Lee Hart wrote: Jay Summet via EV wrote: The eSamba guy is using a piece of fuse wire to each

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Martin WINLOW via EV
-Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart via EV Sent: Tuesday, August 19, 2014 9:08 AM To: Martin WINLOW; Electric Vehicle Discussion List Subject: Re: [EVDL] CALB bolt terminals getting hot - Cor van de Water via EV wrote: Depends on your

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Jan Steinman via EV
From: Roland via EV ev@lists.evdl.org Attach a milliamp meter shunting that one link that was torque... It seems to me that what you mean is a milliVOLT meter. A milliammeter has a low internal resistance that can give you errors if you don't have a good connection between it and the test

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Michael Ross via EV
The website is now working. I forgot to save the changes. I am not branching out to more services. Better for me to learn how to use Google and whatever new stuff they have added. I used Google Picasaweb for years without any trouble. The images I linked to were migrated to G+. I am guessing

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread EVDL Administrator via EV
On 19 Aug 2014 at 15:48, Willie2 via EV wrote: Please inform me if my Google+ page is not visible to all: https://plus.google.com/102434734002949174273/posts Perhaps one has to be logged on to Google? I didn't think so. I had no trouble seeing your page, and I'm not logged in to Google.

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Willie2 via EV
On 08/19/2014 04:00 PM, Michael Ross via EV wrote: The website is now working. I forgot to save the changes. I am not branching out to more services. Better for me to learn how to use Google and whatever new stuff they have added. I used Google Picasaweb for years without any trouble. The

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Michael Ross via EV
Sorry, the BMS on this pack is hanging outside the pack. There is an image of another pack (32120 cells) that has the BMS mounted inside its wrapping. The pack is meant to be used by eScooters and such. As these things go it was very economical and seems to be functioning very well - except a

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Jay Summet via EV
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 08/19/2014 07:54 PM, Ben Apollonio via EV wrote: True enough, but if a 200Ah cell fails shorted, it still has 200Ah to dump all by itself, which is likely to be equally catastrophic. I think the probability of occurrence is higher with 200 1Ah

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Peri Hartman via EV
] CALB bolt terminals getting hot - The cells in the TESLA pack are a group in parallel then the parallel groups are wired in series for the desired voltage, The key to pack survival when a cell fails is a fusible link (Correctly sized short length of wire) in series with each and every cell

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Jay Summet via EV
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 08/19/2014 09:12 PM, Peri Hartman via EV wrote: So, if you want individual fusible cells, then a bus bar on both terminals won't work. One side can be spot welded but the other side needs the fuse wire - or something. Not sure how that

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Dennis Miles via EV
ev@lists.evdl.org To: Lee Hart leeah...@earthlink.net; Electric Vehicle Discussion List ev@lists.evdl.org Sent: 19-Aug-14 5:29:00 PM Subject: Re: [EVDL] CALB bolt terminals getting hot - The cells in the TESLA pack are a group in parallel then the parallel groups are wired in series

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Dennis Miles via EV
Flashlights only have a current draw of half an amp. The 18650 cells are typically used at FIVE amps. And I often have to shake my flashlights to clean the contacts before they attain normal brightness. (That indicates they a corroding.) About two years ago I recall seeing a spot-welding system

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-17 Thread Martin WINLOW via EV
What, as a matter of interest, is an acceptable amount of resistance in a battery or cell terminal connection? MW On 17 Aug 2014, at 00:48, EVDL Administrator via EV wrote: On 16 Aug 2014 at 14:04, Lee Hart via EV wrote: The technique has been described many times on the EVDL. It must be

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-17 Thread Martin WINLOW via EV
as heat. Cor van de Water -Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Martin WINLOW Subject: Re: [EVDL] CALB bolt terminals getting hot - What, as a matter of interest, is an acceptable amount of resistance in a battery or cell terminal connection

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-16 Thread Chris Meier via EV
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

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-16 Thread Lee Hart via EV
Danpatgal via EV wrote: I have on my to-do list to clean up the connections. With the BMS modules on there it's just a pain and I have to be very careful (I know - if I had done it at the beginning ...). You can measure the resistance of the connections without taking them apart. Then only

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-16 Thread EVDL Administrator via EV
On 16 Aug 2014 at 14:04, Lee Hart via EV wrote: The technique has been described many times on the EVDL. It must be in the archives somewhere. Before I type it all in yet again, maybe we can find it? Here's one method. http://www.evdl.org/archive/index.html#nabble-td4657626|a4657642 Just

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-16 Thread Jan Steinman via EV
From: Lee Hart via EV ev@lists.evdl.org You can measure the resistance of the connections without taking them apart... All you need is a normal multimeter and a source of a known current (like your charger)... The technique has been described many times on the EVDL... Pump a fixed known

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-15 Thread Danpatgal via EV
I have on my to-do list to clean up the connections. With the BMS modules on there it's just a pain and I have to be very careful (I know - if I had done it at the beginning ...). I noticed the temperature first while driving from the BMS (Lithimate Lite) telling me one cell was getting over

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-14 Thread Jan Steinman via EV
From: Danpatgal via EV ev@lists.evdl.org ... 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. That doesn't seem like much! In fact, that

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-14 Thread Michael Ross via EV
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

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-14 Thread corbin dunn via EV
On 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. Do you get it when driving? I have the Elithion Pro BMS. My to hot warning

[EVDL] CALB bolt terminals getting hot -

2014-08-13 Thread Danpatgal via EV
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