BMS for 4S30P battery pack

msacco

1 mW
Joined
Nov 15, 2019
Messages
12
Hi, I'm looking for a BMS for a 4S30P battery pack. I'll be using Panasonic NCR18650B unprotected batteries.
I might need to purchase that from ebay/aliexpress/amazon, recommendations would be much appreciated!

The battery will be used in the field for running 12V 0.5A-10A(doubt I'll actually need more than 3A though) continuous applications.
If there is more specific information required just let me know.

Thanks! :)
 
I use this for accudrill battery repair and works just fine.

https://www.aliexpress.com/item/32852015245.html?spm=a2g0s.9042311.0.0.7c1b4c4dJcgbsF
 
krlenjuska said:
I use this for accudrill battery repair and works just fine.

https://www.aliexpress.com/item/32852015245.html?spm=a2g0s.9042311.0.0.7c1b4c4dJcgbsF

Will that really be enough?
Generally I own the following BMS's:
https://www.aliexpress.com/item/32961705432.html?spm=a2g0s.9042311.0.0.27424c4dP1O6H3
https://www.aliexpress.com/item/32837937191.html?spm=a2g0s.9042311.0.0.27424c4dP1O6H3
https://www.aliexpress.com/item/32825295188.html?spm=a2g0s.9042311.0.0.27424c4dP1O6H3

Will any of them be sufficient? Won't it be more recommended getting a better quality BMS?

Thanks! :)
 
Probably not because you dont need better one - this bms can handle 10A without isues.
BTW why 30P battery? What is this for?
 
krlenjuska said:
Probably not because you dont need better one - this bms can handle 10A without isues.
BTW why 30P battery? What is this for?

I'll be using this for running my astrophotography gear(astronomy imaging). The things I'll need to run are:
Cooled camera(should peak at 3-5A), mount(should peak at 2-3A, but averages at 0.5A probably), another camera which should take 0.5A max, a laptop which should peak at 3.25A and I'm not even sure I'll use this battery for it as I also have another 75AH deep cycle battery which I'm thinking of using only for the laptop or the other way around, use the battery only for the laptop, and also a few other smaller components which doesn't take all that much.

With the 75AH deep cycle battery since I can only use around 50% without damaging the battery that's usually not enough for 2 night sessions(which is what I aim for), so I'm building a new battery.

If the BMS's I've posted above should be fine, which one would you choose and think is the best for me?

Thanks.
 
You asked for reccomendation from your list - i think second is good.

https://www.aliexpress.com/item/32837937191.html?spm=a2g0s.9042311.0.0.27424c4dP1O6H3
 
krlenjuska said:
You asked for reccomendation from your list - i think second is good.

https://www.aliexpress.com/item/32837937191.html?spm=a2g0s.9042311.0.0.27424c4dP1O6H3

Oh, I didn't understood it from your previous post. Thanks! :)
If you think there is something else that's better I can buy that's also an option.
 
You have smart bms. Check this thread:

https://endless-sphere.com/forums/viewtopic.php?f=14&t=88676

https://www.aliexpress.com/item/33043068582.html?spm=2114.12010612.8148356.23.55a53de2ayFwtM


Check this store also:

https://www.aliexpress.com/store/1379203?spm=a2g0o.detail.1000002.2.15197614ZnM5oS
 
krlenjuska said:
You have smart bms. Check this thread:

https://endless-sphere.com/forums/viewtopic.php?f=14&t=88676

https://www.aliexpress.com/item/33043068582.html?spm=2114.12010612.8148356.23.55a53de2ayFwtM


Check this store also:

https://www.aliexpress.com/store/1379203?spm=a2g0o.detail.1000002.2.15197614ZnM5oS

Thanks, but does it give anything else besides the ease of monitoting?
 
msacco said:
krlenjuska said:
You have smart bms. Check this thread:

https://endless-sphere.com/forums/viewtopic.php?f=14&t=88676

https://www.aliexpress.com/item/33043068582.html?spm=2114.12010612.8148356.23.55a53de2ayFwtM


Check this store also:

https://www.aliexpress.com/store/1379203?spm=a2g0o.detail.1000002.2.15197614ZnM5oS

Thanks, but does it give anything else besides the ease of monitoting?

You can set cut-off voltage to lower value (4.1V for example) and save battery life. Monitoring is big deal - easy to detect problem with some group of cells - and its easy to find that cell later and replace it.
Also quality of BMS is higher.
 
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