Product introductionThe main IC has the functions of overcharge, overdischarge, overcurrent and short circuit protection. It is used for 3.7V lithium batteries of various capacities and shapes. It is small in size,It is applicable to many occasions requiring high integration and low cost, and can meet various performance requirements

Three series 12V18650 lithium battery protection board with equalizing 25A overcurrent protection·Features of the protection plate:[Overcharge voltage range]: 4.25-4.35V ± 0.05V[Overdischarge voltage range]: 2.3-3.0V ± 0.05V[Upper limit working current]: 20-25A (pay attention to heat dissipation)[Working temperature]: 40 ---+50 ℃[Upper limit of instantaneous current]: 35-40A[Storage condition]: - 40 --+80 ℃[Quiescent current]: less than 30uA[Effective life]: more than 30000 hours[Internal resistance]: less than 100m Ω[Short circuit protection]: can protect and delay self recovery[Equalizing current]: 45MA[Charging voltage]: 12.6V-13V[Description of test point]: When S1 and S2 are short circuited, P+P will output voltage, indicating that all MOS protections are normal. The function of temperature protection can be expanded by adding normally open temperature detection.·Scope of application:Battery pack of massager, standby power supply of LED lamp, 12VElectronic products, solar street lamp battery pack, monitoringStandby power supply and other products.·Note:For discharge products with current greater than 3ADischarge rate shall be greater than 3C.Multiplication calculation formula: for 1C batteryMagnification factor, 2000 capacity is equal to 2AH * 1=2A operationThe current 3C rate battery has a capacity of 2000 equal to 2AH * 3=6A working current. During use, the battery will heat up, that is, the battery magnification is not applicable. In this case, it cannot be used for a long time, and the battery will be damaged soon.Note 1: Connect 0V (B -), 3.7V (B1), 7.4V (B2) and 11.1V (B+) in strict accordance with the figure, and do not intentionally short circuitNote 2: After connecting the cable, it is required to charge before output.Note 3: When three groups of batteries are connected in series, please ensure that the voltage of each group of batteries is the same, otherwise, please fill each group of batteries separately and use them in series. During the discharge test, the battery with the fastest voltage drop is a bad battery.Note: Do not mix high-quality batteries with low-quality batteries. The closer the capacity/internal resistance of the three batteries is, the better (two good batteries+one poor battery=three poor batteries).·Tips:This protective plate cannot be used for lithium iron phosphateBattery, hernia lamp, electric drill battery pack, electric fish machine battery pack, electric vehicle battery pack, children's carBattery, motor above 775 (4A) and 1W fisheye LED lamp, please pay attention to customers who purchase the above combination

4-string lithium battery protection board 30A with equalizationUpper limit current: within 30ACharging current: within 30ABalancing: chargingShort circuit: protectionApplicable to assembly Nominal: 3.7V battery/4 stringsThe green panel is a 3.7V lithium battery protection panel, andThe blue plate is 3.2V lithium iron phosphate protection plateThe wiring mode is the same.

22A current limiting of 6 series lithium battery protection boardUpper limit working current: 14AUpper limit of instantaneous current: 22AOvercharge voltage range: 4.25V ± 0.05VOverdischarge voltage range: 2.5V ± 0.05VQuiescent current: less than 30 μ ACharging voltage: 25.2V ～ 26V[Note 1]: Connect 0V (B -), 3.7V (B1), 7.4V (B2), 11.1V (B3), 14.8V (B4), 18.5V (B5), 22.2V (B+) in strict accordance with the figure, and do not intentionally short circuit[Note 2]: After connecting the line, it can only be output after charging.[Note 3]: When 6 batteries are connected in series, please ensure that the voltage of each battery is the same. If they are different, please charge each battery separately and use them in series. During the discharge test, the battery with the fastest voltage drop is a bad battery.[Note]: Do not mix good batteries with bad batteries. The closer the capacity/internal resistance of six batteries is, the better (the use effect of four good batteries+two poor batteries=the use effect of six poor batteries).[Description and explanation]:6 series (6 18650 batteries or polymer lithium batteries in series)21.6V (rated voltage of polymer battery)22.2V (rated voltage of 18650 or 3.7V lithium battery)25.2V (voltage after lithium battery is fully charged)Discharge 22A (refers to upper limit of discharge current)