Brushless Posted June 10, 2023 Share Posted June 10, 2023 Here's my simplified STL for the clips, allows it to be printed upright with minimal support. SVoltBatteryClip.stl Chris_S 1 Quote Link to comment Share on other sites More sharing options...
NoordSolar Posted June 10, 2023 Share Posted June 10, 2023 These cells need very little top balancing - they are all within 1% is capacity and initial charge . I would just charge them all in series with your BMS and let the BMS top balance it if you have a BMS with decent balancing current Brushless 1 Quote Link to comment Share on other sites More sharing options...
P1000 Posted June 11, 2023 Share Posted June 11, 2023 On 2023/06/09 at 8:17 AM, NoordSolar said: Has anyone had busbars made using laser cutting copper? Copper is one of the more challenging materials to laser cut, for the same reason that it is used for the mirrors in CO2 lasers. So it might be difficult to find a supplier that can do it. Water jet cutting will work, but at a much higher cost. Chris_S 1 Quote Link to comment Share on other sites More sharing options...
Chris_S Posted June 11, 2023 Share Posted June 11, 2023 I would get some copper flatbar. Cut to length and drill. Then have them nickel plated. Raj35 and NoordSolar 2 Quote Link to comment Share on other sites More sharing options...
NoordSolar Posted June 11, 2023 Share Posted June 11, 2023 2 hours ago, Chris_S said: I would get some copper flatbar. Cut to length and drill. Then have them nickel plated. I think I have found a crowd in Pinetown that will do it Quote Link to comment Share on other sites More sharing options...
gimme_power Posted June 11, 2023 Author Share Posted June 11, 2023 On 2023/06/10 at 9:23 AM, Brushless said: Bought some of these cells new yesterday from Telenetix in Centurion (0861887847) for R1140 each (incl. VAT). Pity the busbars and clips aren't available here yet but I'm having some busbars CNC cut from aluminium. Will try 3D print some clips after modifying the STP file (*thanks NoordSolar for the link). Top balancing large capacity cells like these is going to be a challenge though as my biggest charger only does 15A. Anyone in JHB have a high amp LFP charger? Can't see that on their website, do you have a link? Or do I have to phone them? Do you know how many they have in stock? Quote Link to comment Share on other sites More sharing options...
Brushless Posted June 12, 2023 Share Posted June 12, 2023 Just phone them, speak to Andre. When I was there on Friday they still had a container full left. jlr 1 Quote Link to comment Share on other sites More sharing options...
gimme_power Posted June 12, 2023 Author Share Posted June 12, 2023 32 of these cells coming my way . We'll need to share tips and tricks on how to put them together. Unfortunately my build will have to wait till end of the year... ish Quote Link to comment Share on other sites More sharing options...
Froggy Posted June 18, 2023 Share Posted June 18, 2023 https://flic.kr/p/2oJ2Qz2 gimme_power, PsyCLown, Clint and 2 others 5 Quote Link to comment Share on other sites More sharing options...
PsyCLown Posted June 19, 2023 Share Posted June 19, 2023 9 hours ago, Froggy said: https://flic.kr/p/2oJ2Qz2 Looking good Mr Froggy, what BMS is that and how do you plan to connect all the batteries? I am also keen to see how you finish it off as I am seriously considering building such a battery for myself (and later maybe another 1 or 2). Quote Link to comment Share on other sites More sharing options...
John2 Posted June 19, 2023 Share Posted June 19, 2023 On 2023/06/08 at 9:05 AM, NoordSolar said: HAve you come across a decently priced DC breaker with a 10 -20 KA+ fault current rating ? I used these. NoordSolar 1 Quote Link to comment Share on other sites More sharing options...
NoordSolar Posted June 19, 2023 Share Posted June 19, 2023 25 minutes ago, John2 said: I used these. Where did you get this from ? Quote Link to comment Share on other sites More sharing options...
John2 Posted June 19, 2023 Share Posted June 19, 2023 @NoordSolar Form Feeo electronic in China. NoordSolar 1 Quote Link to comment Share on other sites More sharing options...
Froggy Posted June 19, 2023 Share Posted June 19, 2023 7 hours ago, PsyCLown said: Looking good Mr Froggy, what BMS is that and how do you plan to connect all the batteries? I am also keen to see how you finish it off as I am seriously considering building such a battery for myself (and later maybe another 1 or 2). Thanks PsyCLown! It's a JK BMS. I'm busy making the busbars with good old 22mm copper water pipe. Some might scoff at the idea,but it served me well so far. One just needs to ensure they are 100 % flat. I just have to decide if I'm going to nicke plate. I'll be using stainless washers, spring washers and nut torqued to 8nm. PsyCLown, gimme_power and Antonio de Sa 3 Quote Link to comment Share on other sites More sharing options...
NoordSolar Posted June 20, 2023 Share Posted June 20, 2023 Is the pipe simply squashed , so its two layers ? Quote Link to comment Share on other sites More sharing options...
PsyCLown Posted June 20, 2023 Share Posted June 20, 2023 (edited) 1 hour ago, NoordSolar said: Is the pipe simply squashed , so its two layers ? To me it looks as if it was cut (so a single layer) then flattened so it is no longer circular. Can someone who purchased from Telenetix confirm that the threaded studs are already installed on the cells. Edited June 20, 2023 by PsyCLown Quote Link to comment Share on other sites More sharing options...
Chris_S Posted June 20, 2023 Share Posted June 20, 2023 31 minutes ago, PsyCLown said: To me it looks as if it was cut (so a single layer) then flattened so it is no longer circular. Can someone who purchased from Telenetix confirm that the threaded studs are already installed on the cells. Yes those are welded studs jlr and PsyCLown 2 Quote Link to comment Share on other sites More sharing options...
reapster Posted June 29, 2023 Share Posted June 29, 2023 Just got 16 of these too! As mentioned previously, all pretty much perfectly balanced (within 1-2mv) Just waiting on the clips + bus bars too now. PsyCLown 1 Quote Link to comment Share on other sites More sharing options...
gimme_power Posted July 1, 2023 Author Share Posted July 1, 2023 On 2023/06/29 at 12:16 PM, reapster said: Just got 16 of these too! As mentioned previously, all pretty much perfectly balanced (within 1-2mv) Just waiting on the clips + bus bars too now. Where are you getting clips and Busbar from? Quote Link to comment Share on other sites More sharing options...
Chris_S Posted July 2, 2023 Share Posted July 2, 2023 Personally I would want to compress just a tiny bit so clips don't seem like a good idea for that. DeonBez 1 Quote Link to comment Share on other sites More sharing options...
reapster Posted July 2, 2023 Share Posted July 2, 2023 On 2023/07/01 at 7:31 PM, gimme_power said: Where are you getting clips and Busbar from? Altergrid mentioned they expecting them around mid-August Quote Link to comment Share on other sites More sharing options...
gimme_power Posted July 4, 2023 Author Share Posted July 4, 2023 Reminder to anyone who has two of these cells spare (like me) that I will be interested. I have two spare as I am building two 15 cell packs but had to buy 16 cells. I can make a 12V battery if I can lay my hands on another two cells Thanks Quote Link to comment Share on other sites More sharing options...
Tim003 Posted July 4, 2023 Share Posted July 4, 2023 4 hours ago, gimme_power said: Reminder to anyone who has two of these cells spare (like me) that I will be interested. I have two spare as I am building two 15 cell packs but had to buy 16 cells. I can make a 12V battery if I can lay my hands on another two cells Thanks Or you can use all 16 of them. Quote Link to comment Share on other sites More sharing options...
gimme_power Posted July 4, 2023 Author Share Posted July 4, 2023 (edited) 31 minutes ago, Tim003 said: Or you can use all 16 of them. Or that... Except I need to match it with other 15cell packs as they will be in parallel. Or do you have a solution for that? Like a big DC to DC converter, bi-directional Edited July 4, 2023 by gimme_power Quote Link to comment Share on other sites More sharing options...
Tim003 Posted July 4, 2023 Share Posted July 4, 2023 57 minutes ago, gimme_power said: Or that... Except I need to match it with other 15cell packs as they will be in parallel. Or do you have a solution for that? Like a big DC to DC converter, bi-directional Why in parallel? Quote Link to comment Share on other sites More sharing options...
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