4S 16.8V 40A 18650 Li-ion Lithium Battery Module BMS PCB Integrated Circuits Protection Board Cell Version Balance Board

4S 40 A Charging voltage: dc 16.8v ~ 17v Continuous discharge current: 40a maximum (if the heat dissipation environment is not good, please reduce the load current) Continuous charging current: up to 20a Balance product size: 45*60*4mm Improve product size: 44*55*4mm Relevant selection: Applicable to the nominal voltage of 3.7v, charged 4.2v. (including 18650, 26650, lithium polymer battery), can be drilled below 170w Note 1: The successful start of the drill requires three 15c-20c power battery, or six 10c-15c power battery (ordinary 18650 can not start the drill!!). Note 2: Strictly according to the wiring map 0v, 4.2v, 8.4v, 12.6v, 16.8v, do not intentionally short circuit. Note 3: When the brush motor load is used, try to connect a non-polar capacitor (voltage above 25v, capacity 10uf-100uf) to the positive and negative terminals of the motor to prevent the reverse displacement. Break the mimosa tube. Note 4: 4 groups of batteries, please make sure that the voltage of each group of batteries is the same, if not the same, please charge each battery separately and then use in series. Discharge test, the voltage drops faster battery that group is a bad battery. The figure below shows the module discharge diagram. The battery is 4 strings. The connected battery needs to withstand the discharge current of 40. It can be realized by capacitors or purchasing a battery with a large discharge current. For example, the battery is 2000mah, discharge number 10c, then only need 4 series 2 and the maximum current can reach the discharge current, stable discharge requires 4 strings 4 and can be, and need to pay attention to heat dissipation, the battery power will decrease rapidly.