Recent content by powersupply

JBD has their own website selling their products but they also sell on AliB! Many items are sold out on their own website but available on AliB, so strange. Don't want to start another thread, looking for battery cable wire to beef up my friend's spot welder transformer and add handheld welding...

Cool, didn't know that, so smart BMS it is. Many here don't recommend ali-xyz, but to get it from OEM only. I'll check the products from recommended JBD again, hope they have them in stock meanwhile. Thanks!

Thanks, diving into BMS, reading their specs (if any), seems most start balancing only when over 4 Volts! Wanted to avoid going that high. Do I need an external balancer (in hope they balance all time-ish)?

Gotcha, looking at JBD BMS offerings, all 7s units are sold out or unavailable, for over a week now. There are ebay and alibaba offerings but considering the counterfits, i'd rather get them directly. Question, does JBD have a secondary official outlet, a reseller in the US or Europe? Also...

The batteries will definetly not brought near the full or empty regions, I will make sure of that with the UPS low and high triggers. The batteries will have a long time (days) to recharge/balance, never experienced more power outages shortly after a long one (+5h). So what you are mentioning is...

I had built battery packs in the past (soldering the NiMh taps), now borrowed a sukhi spot welder. Used Daly 30A BMS for a different project, software is weird, but great to have insights. Is this what Amberwolf and you think of? 150mA passive balance Is that enough for slow charging/balancing...

Thank you for your reply. Thanks for worry free charging via SLA UPS. I can adjust the "float" voltage quite accurately, planing for around 3.9V per cell. Makes sense regarding balancing. I now understand why on JBD one of their BMS was featured with 150mA balancing current. Which are the BMS...

I found these, but no spacers yet, how do you plan to keep them in place?

The current draw is only around 300W i.e. 12A @ 25V. Would a Smart BMS with 30A be enough, considering the actual max output of SMC1000-2UC is only 600W (24A@25V)? "IIRC JBD makes contactor-based units..." I tried to dig into JBD's Smart BMS but got lost. So many products but little info on...

Dear Amberwolf, I love you! Really hoped you reply. Thank you! Since power outages here in SoCal can take half a day, I was planing on 7S30P Samsung Li-ion 2500mah 18650 cells (27.3V * 75Ah). These 210 cells fit perfectly in the pictured space. Don't know how to arrange/connect them (either...

Repurposing APC SmartUPS (SUA1000, SMC1000 etc) for home appliance backups (fridge, mom's oxygen machine etc). Hi all, My apology, I know this is not directly related to endless, but I couldn't find another place with as much educated and helpful and kind members. I (re-)searched this subject...

Hi there, looking to borrow/rent a spot welder in Santa Monica (and surroundings) to connect eight 32650 batteries please. Am sometimes in San Bernardiono also. Thanks!

Yes, violent (shock) vibrations due to windsock on top of the mast. Removing the lead stuff from the old SLA is a real pain so far, will order one of those containers next time. Will have to solder the cells together, wish there were a hobby place here in West Los Angeles where I could spot weld...

That was valuable info, thank you! I thought the batteries must be spaced so they don't short in worst case scenarios. And also leave room for stretching (if they do stretch). Now I understand your "overengineered" comment. I designed it so that regular credit cards can be (heat) bent to act as...

Which is the "Bluetooth BMS"? Is your friend happy with it? Contrary to your friends speaker use, this is not for entertainment. This battery will power a weather station and some other sensors. Does anybody have suggestions before I start building my very first cell based battery? Thanks!