Package Include: (optional)
1*4S12V smart BMS board
1*Cable
1*NTC Temperature Sensor

or

1*UART Cable

or

LCD Touch Screen

FAQ

Q: How do I know what material OR type my battery is ?
A: Please look the battery body,if the normal voltage of your  battery shows 3.2V,the battery is LiFePo4.If the normal voltage of your battery  shows 3.6V or 3.7V, the battery is Li-ion or Li-polymer battery, You can also  ask battery manufacturer for the material of battery.

Q: Is this BMS suit for  my battery?
A: This BMS suit your battery or not depends on below 2 points: 
How many series you cell is in your battery pack? The BMS you buy  must be same series as your battery pack.
What material your battery is? Only the LiFePo4 battery has  different electric parameter from other battery, so if you need buy the BMS for  LiFePo4, Please let us know firstly.

Q: What is the Common port and Separate port? what is the  difference?
A: We take 13S 48V16A BMS as example: 
Common port 16A means your charge cathode and discharge cathode  are connected in the same point end (our P-),  charge cathode and discharge  cathode are used in the common connection port, so the charge current and  discharge current are same as 16A. 
Separate port is separately connected by charge cathode (our C-)  and discharge cathode (our P-), so the charge current and discharge current are  different, discharge current is 16A, charge current is 8A.

Q: What is the balance function?Do we need cell balance or not?
A: The working principle and function are as followings:
When your one cell voltage was reached balance  voltage(Li-ion 4.18V, LifePo4 3.6V), that cell balance start work, balance  resistance starts discharge with 35mA, that cell was in both charging and  discharging status, and other cells were not reached balance voltage(Li-ion  4.18V, Life Po43.6V), so they are only in charging status, when the fast cell  voltage was reached overcharge voltage (Li-ion 4.25V, Life Po4 3.75V),BMS starts  off power protection, all the cells are stop charging, this process will enable  your battery charging in balance current, and your battery voltage are in  balance status.
However, if your cell voltage difference are in a big range, The  equilibrium effect is almost zero,The solution is to replace cells with large  voltage gaps.

Q: The relationship between battery capacity(AH or mAH) and BMS  current(A)?
A:There is no direct relationship between battery capacity and BMS current, big  capacity doesn't mean big current, but rely on continue current, that is to say  if your engine is powerful, you should choose high current of BMS, it is not  relied on battery capacity.
 
Q: What type of charger should i choose?
A: Lithium battery must choose specific charger, don't use charger for leadacid  battery, for leadacid charger may have MOS with high pressure breakdown  protection, which will not protect of BMS over charge. LiFePo4 battery  charger voltage = number of battery strings X 3.6V, while Li-ion battery charger  voltage = number of battery strings X 4.2V.
 
Q: What current BMS should I choose ?
A: Take 10S 36V as example: 
What current BMS you choose is depend on your E-bicycle motor  power and current limitation of controller,eg.16A for 350W and below, 25A for  500W and below, 35A for 800W and below, 60A for 1000W and below,  over 1200W are  contact with our service specialist for suggestion, continue current shall be  higher than current limitation in controller.

Q: Do you have Minimum Order Requirement (MOQ)?
A: No, we don't have MOQ. different customer have different requirement ,we can  provide various capacity and size as per your requirements, also ODM / OEM is  welcome.
 
Q: How to contact for BMS?
A: Please send messages at below or E-mail us and  we are always glad to help you with BMS.