Which means, I would assume, separate fuse for each battery. Anything else?A potential problem is if you have a load in excess of 100 amps and one battery goes down for any reason.
Be sure to wire and protect for such a scenario.
Which means, I would assume, separate fuse for each battery. Anything else?
What size fuse between each battery? 100Amp?That’s about it, fuse or breaker on each.
you likely have adequate 100 amp wire size already from each battery to a busbar which is where the protection would go.
200 amp wire and protection from the busbar to load.
Wire size resource :
Part 1: Choosing the Correct Wire Size for a DC Circuit - Blue Sea Systems
Engineering high quality marine electrical components for safety, reliability and performancewww.bluesea.com
Each battery fuse to match its size, thus 100 amp, and then a fuse to match the overall current going out of the battery array, in my case: 200 amp.What size fuse between each battery? 100Amp?
Got it thanksEach battery fuse to match its size, thus 100 amp, and then a fuse to match the overall current going out of the battery array, in my case: 200 amp.
My question would be then- why put a fuse out of each battery at all?Something to consider. A LiFePO₄ battery that states 100A max is likely claiming 100A of max continuous discharge current. It likely supports 200A for a few seconds to handle a surge. So putting a 100A fuse on such a battery probably isn't the best choice. Why have the fuse blow while the battery is perfectly content putting out 100A. If you want a fuse to blow before the BMS is forced to shut things down then you probably want a 150A fuse on each battery that is rated for 100A max continuous discharge. This allows the battery to be in its happy place all day without the fuse tripping. But the fuse will likely trip before the BMS shuts down to protect the battery from too high of a current.
Problem is if you have a short either in the battery or the cable or BMS then all the current from the other batteries in parallel will dump their current to the short.My question would be then- why put a fuse out of each battery at all?
We have the overall fuse going into the bus (200 amp for example) and the BMS of each battery is definitely capable of maintaining the load for that battery.
Why do we need that extra fuse, then?
I have cables that will help parallel a pack. I crimp lugs on those cables. I secure the cables o studs with nuts. The cables are the same size. My batteries are now properly paralleled.we have parallel module that can help parallel two battery packs to increase battery capacity
ok but what if we have two - new tech 230a batteries with both having their own 200ah advanced bms ? can you draw up to 200 still, even if one battery completely fails - do we still need to "wire and protect" for such a scenario? these are the 2 batteries in question which have some advanced features which may not need to have "wire and protection" as you state.. please advise.. https://www.amazon.com/Litime-LiFePO4-Battery-Lithium-Phosphate/dp/B0BYH8J176/A potential problem is if you have a load in excess of 100 amps and one battery goes down for any reason.
Be sure to wire and protect for such a scenario.