Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2193
| Posted: 03:07am 19 Dec 2023 |
It's not the brand you mentioned, but as these batteries are a few years old, I don't want to cause any harm to small businesses that would have been doing it tough back then, and are likely having more trouble now with the way they are being secretly backhanded by various groups of clowns.
But even after getting the connection links in a low loss working state, this bank did not have a hope of starting the big BandSaw, just trips with low voltage.
The 48V pack built from the same cells now has no trouble. I would likely put that down to the extra voltage drop across Four BMS, 4 sets of positive battery terminal to cell connections, and the smaller gauge cables used.
They simply cannot handle 300ms 400A DC inrush current peaks from the AC load on the inverter. They would definitely drop below the LV cutout, I'm assuming that the BMS is not spitting the dummy, but who knows, and frankly I could care less as they will no longer exist after I rip their guts out
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Edited 2023-12-19 13:08 by KeepIS