4S 20A lipo BMS

 This protection board cannot be used for lithium iron phosphate batteries  , hernia lights, hand drill battery packs, electric fish machine battery packs, electric bicycle battery packs, children’s car batteries, motors above 775 (4A), and 1W fisheye LED lights for the above Please pay attention to customers who purchase in combination! .

The power range described is applicable to the following products:

     Low-power inverter, massager battery pack, LED lamp backup power supply, electronic products, solar street lamp battery pack, monitoring backup power supply, and other products.

Note: For products with a current above 3A, the battery discharge rate must be above 3C.

The magnification calculation formula: For a battery with a 1C magnification, the 2000 capacity is equal to 2AH*1=2A upper limit working current.

3C rate battery, 2000 capacity is equal to 2AH*3=6A upper limit working current.

The battery will heat up during use, which means that the battery rate is not applicable. In this case, the battery cannot be used for a long time and the battery will be damaged quickly.

Note 1: Wiring 0V (B-), 3.7V (B1), 7.4V (B2), 11.1V (B3), 14.8V (B+) strictly according to the diagram, and do not intentionally short-circuit!

Note 2: After the line is connected, it needs to be charged before output.

Note 3: When connecting 4 sets of batteries in series, please ensure that the voltage of each set of batteries is the same. If they are not the same, please charge each set of batteries separately and then use them in series. During the discharge test, the battery with the fast voltage drop is a bad battery.

Explain: Don’t mix good batteries with bad batteries! The closer the capacity/internal resistance of the 4 sets of batteries, the better! (2 good batteries + 2 bad batteries = 4 bad batteries).

The attributes of the lithium battery protection board:

Model: HX-4S-D20 Overcharge voltage range: 4.25-4.35v±0.05v

Size: 35*35*3.6mm Over-discharge voltage range: 2.3-3.0v±0.05v

Maximum working current: 10A Working temperature: -40—+50℃

Upper limit instantaneous current: 20A Storage conditions: -40– +80℃

Quiescent current: less than 30uA Effective life: more than 50,000 hours

Internal resistance: less than 100mΩ Short circuit protection: can be protected, need to charge recovery

Charging voltage 16.8V-17V

The protection board size and device description;

The size of the protection board is 35*35*3.0mm; the components are S-8254AA protection chip and D403*4