Battery Management Systems
JK-BMS (New) 8S-16S, 24V 48V, 100A-200A
Here we have a brand new JK-BMS with a lot of new features. it can communicate with almost any inverter on the market via CAN or RS485. PLUS it has an active balancer onboard, so no need to install one!
Battery Management Systems
JK BMS with integrated 2A active Balancer
This is a very popular BMS unit from JK and has active balancing as standard. It has excellent user reviews and the newer units can make use of a screen and switch/
Battery Management Systems
Daly Battery BMS
These links are for Daly Smart BMS battery management system . If you have 4 cells, choose a 4S version rated for the amps needed.
4S 100A / 120A / 150A / 200A / 250A 300A (with Fan) / 400A (with fan) / 500A (with fan)
8S 100A / 8S 120A / 8S 150A / 8S 200A / 8S 250A / 8S 250A (with fan) / 8S 400A (with Fan) / 8S 500A (w
Battery Management Systems
Qucc Smart bms 4s lifepo4
This BMS manufacturer offer good products at very good prices & have a BMS for every application.
Active Balancing Board
JBD 5A Active Balance Board
This is an active balancing module which helps keep your battery cells equally balanced. I use these exact ones and they are plug & Play.
How To Connect A BMS
Don't be overwhelmed when wiring a BMS
All battery management systems work in the same way and are easily added to your DIY battery build.
When you receive your BMS it will have "Balance" leads.
These leads may be the same colour or a mixture of colours depending upon the brand, but they will all have one thing in common - a single "BLACK" wire.
That wire is your starting point!
An important thing to remember when choosing a BMS is knowing that it wont stop you drawing more amps than it is actually rated for, so be sure to size your BMS for the amps you would normally expect to draw from your batteries.
REMEMBER - It is the fuse that will save you and your batteries from damage in an over amp scenario!
It does not matter how big your battery bank is, your BMS will be supplied with the number of balance leads you require.
For this example we have a 4 cell Lifepo4 battery pack and we have already made the battery into 12 volts.
The 4s BMS will have 5 leads in total and they are wired in sequence.
Take the 1st wire (Black) and connect that wire to the main NEGATIVE terminal of the 1st cell.
Now take the lead closest next to the black wire and connect that to the 1st POSITIVE terminal of the 1st cell.
Take the next wire in line and connect that to the POSITIVE terminal of the second battery cell.
Once you have made that connection, take the next wire in line and connect that to the 3rd cell POSITIVE.
Lastly, take the last wire in sequence and connect that to the POSITIVE terminal of the last battery cell.
Almost everyone uses "COMMON" port battery management systems but there are others called "SEPERATE" port battery management systems as shown in the diagram.
Your BMS will have 2 wires marked P- and another B-
The B- wire from the BMS connects to the 1st main negative terminal of your battery.
The wire marked P- is now the main NEGATIVE input / output terminal.
You simply add another RED wire to the main POSITIVE of the last cell and that makes your battery complete.
You can now plug your balance lead terminal into the battery management system.
Separate port BMS will have a wire labelled C-
This is a charge inlet only type of BMS.
Look upon it as a one way valve.
While the regular common port BMS can be charged & discharged using the main P- terminal, a separate port must be charged through C- terminal only!
