wich safety device to add to this module and what are the general steps

[sharinginfos]

hi
There seems to be a short cut to building a battery for those able to get a module like this one

48v 16s3p A123 26650 Lifepo4 Module 52.8v 7.5ah 396wh

It's very rare to find 16s Lifepo4 48v modules like this. They are very clean and made of A123 ANR26650M1B cells. There are a total of 48 cells in 16s3p configuration. All you need is a T-15 security bit that is at least 2" long to open the case. There are 14 screws. The case comes off easy, no...

batteryhookup.com

they are already spot welded in place so i imagine that this is a short cut already done step. how easier does starting with a module like this is ? is it really faster or is there some cell dissasembling to do

1 apart from adding a bms what is there to add to add safety feature or usefull feature while being in there?

2 do each cell needs to be tested? how and what parameter to respect

3 is balancing steps required?

4 what should one be aware of before starting with such a module?
thanks
im a noobish but read alot

 

[fechter]

I would first measure all the cell group voltages. This will tell you if you have any bad cells. Anything below 3v would be suspect. Anything below 2v is likely toast. Once you verify all the cells are good, I would recommend using a BMS made for LiFePO4 that's rated for about 2x the current you expect to be using. The BMS will prevent over charging and over discharging of the individual cell groups.

 

[sharinginfos]

ok bms to each cell or to paralle group?
any other safety device or
device to monitor how the cells are doing once the battery pack is closed to suggest?

 

[docw009]

The BMS you want is a single circuit card that connects to all 16 cell groups, like this one. Add "DIY" as a coupon code when you order. and you get 5% off the total,

Li-ion/Lifepo4 3s-20s 30a BMS WITH BALANCE

Note: These are not compatible with our bluetooth modules or computer interfaces. --------------------Here are 30a BMS units with 50ma balance function. We carry 3s-20s and both Lithium Ion (Li-Ion) and Lithium Iron Phosphate (Lifepo4). The lithium ion version also works with Lithium Polymer...

batteryhookup.com

You can also find them on aliexpress, but it's a guessing game.

 

[E-HP]

A temp monitor for peace of mind.

 

[sharinginfos]

The BMS you want is a single circuit card that connects to all 16 cell groups, like this one. Add "DIY" as a coupon code when you order. and you get 5% off the total,

Li-ion/Lifepo4 3s-20s 30a BMS WITH BALANCE

Note: These are not compatible with our bluetooth modules or computer interfaces. --------------------Here are 30a BMS units with 50ma balance function. We carry 3s-20s and both Lithium Ion (Li-Ion) and Lithium Iron Phosphate (Lifepo4). The lithium ion version also works with Lithium Polymer...

batteryhookup.com

You can also find them on aliexpress, but it's a guessing game.

HI how is a single circuit card diffenrent from other bms that also have wires to all 16 parallele groups?

 

[sharinginfos]

I read that people find it usefull to ba able to read (some save) data from each parallele group battery reaction tables chart or like to have usefull info like that maybe precise voltage at wich it is atm . Is this a fonctionnality of only certain bms
or can it be a independent device to read this stuff.