4S 4.2v li-ion balancer board li-ion balancing full charge battery balance board

The balance board is suitable for the li-ion battery pack BMS WHICH without balance function, so as to equalising charge lithium battery charge function, make the battery pack each series charge at the same time.

Note:The balancing board must need BMS to use together, and the BMS is without balancing function

Specifications:
Balance Voltage for each single cell: 4.2V
Balance current for each single cell: 66mA

Balancer is just a Auxiliary function, The balancing means when the battery charging, each series battery need with the same voltage.when ONE cell voltage get 4.2V ,the other cells not, the first cell voltage will discharge to wait the other cells rising to the same level.

Note:
battery internal resistance differences within 5 milli ohm, voltage within 0.03 V voltage, capacity vary within 50 ma

Cut-off Voltage is according to the BMS setting.

Note:the balancer starts balancing when the one cell get 4.2V, The Cut-off Voltage is according to the BMS setting, but the bms cut-off voltage needs more than 4.25V which is much better.

4S Connection instruction:
B4+ Connect battery positive;
B3+ Connect the point between battery 1 and battery 2;
B2+ Connect the point between battery 2 and battery 3;
B1+ Connect the point between battery 3 and battery 4
B- Connect battery negative;

4S balance board demo use. balance board should be used together with other PCM which has no balance function
(4S balance board) + (PCM without balance) = ( PCM with balance )

4S balance board can be used as 3S
4S balance board can be used as 2S

Notice:
1) This balance do not have charge and discharge protection function, so it cannot be instead of bms

Size: 2.1x2cm/0.83×0.79inch
Quantity: 1 Pc
1 x Battery Balance Board
1 x Battery Balance Board