Last week I got in a critical situation that was not protected by the Batrium system.
I use 6 280Ah packs in parallel. My maximum overall charge/discharge amperage is 200A currently. In a normal situation all is running well with about 32A flowing through each pack. All is protected by a single contactor which is operated by the relais on the Batrium board (Critical BattOK).
Now, one battery connector on the first pack got loose causing more resistance and heat. Eventually, this pack was discharging slower than all of the other packs resulting (assumption), at almost empty state, in almost handling all the discharge power. This was of course to much and things got really hot. At this stage the faulty pack still had cells at 3.20V while in other packs the cell voltage was below 3V already.
I will now put a lower/faster type of fuse in the pack for it to trip when this happens again. but I wonder why the Batrium does not seem to have a protection built in for maximum cell difference.
Any ideas, experiences like this?