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Description:

1)bms 12v 4s 70a lifepo4
2) For 4S /12.8V LiFePO4 Battery Pack
3) Discharging current:70A
4) Voltage:12V
5) Size:120*80*25mm

bms 12v 4s 70alifepo4                                      Model: OSN-4S7020-BMS No.                            Test   item                        Criterion     1     Voltage Charging voltage DC:14.4V  3.6V/Cell     Balance voltage for single cell 3.600.025V     Balance current for single cell 72 10mA  2 Current Current consumption for single cell ≤20μA     Maximal continuous Charging current 20A     Maximal continuous Discharging current 70A 3 Over charge Protection Over charge detection voltage 3.900.025V     Over charge detection delay time 0.5—2S     Over charge release voltage 3.800.05V  4 Over discharge protection Over discharge detection voltage 2.000.05V     Over discharge detection delay time 10-300mS     Over discharge release voltage 2.30 0.05V 5 Over current protection Over current detection voltage 0.62V     Over current detection current 200 20A     Detection delay time 5ms—20mS     Release condition Cut load, Automatic Recovery 6 Short protection Detection condition Exterior short circuit     Detection delay time 200-500us     Release condition Cut load, Automatic Recovery 7 Resistance Protection  circuitry (MOSFET) ≤20mΩ 8 Temperature Operating Temperature Range -40~85°C     Storage Temperature Range -40~125°C  9 Size   L120*W80*T25mm 10 Weight     11 Motor Power   850W or below

 

 

 

 

 

Main Functions:

 

Theproduct has 6 main functions:over charge, over discharge, overcurrent, short circuits, balancing and low-currentlock. 

 

1. Functionof over charge protection: once voltage of any battery in the packgets higher than the over charge protection point, charge cuts offto ensure all batteries work within the over charge protectionpoint.

 

2. Functionof over discharge: once voltage of any battery in the pack getslower than the over charge protection point, discharge cuts off toensure all batteries work beyond the over charge protectionpoint.

 

3. Functionof over current: during the discharge process of battery pack, oncedischarge current gets over the set over current protection point,output cuts off to ensure battery pack works within the safe limitof current.

 

4. Functionof short circuit protection: once battery pack’s output portappears the condition of short circuit, it cuts off to ensurebattery group not to be damaged because of shortcircuit.

 

5. Functionof voltage balancing: in the late charging period of battery pack,voltage difference that appears during the using process of eachbattery could get balancing revised to ensure battery pack’scapacitance.

 

6. Functionof low-current lock: series connection of low-current lock getsreserved and low current controls on-and-off of the main highcurrent to make it safer and more convenient.