Lithium battery overcharge, overdischarge, overcurrent, short-circuit charging protection board 7.4V 20A Balanced version

Charging Voltage: 8.4V - 9.0V Continuous Discharge Current (Maximum): 20A (If the cooling environment is not good, reduce the load current use) Continuous charging current (upper limit): 10A.

Standard Version: Suitable for rigs with currents up to 25A below 50W or resistive loads below 168W. Balanced type: suitable for electric drills below 25A and below 50W, or a start-up current of a resistive load of less than 168W with balanced charge.

Note 1: Two 10C-20C power batteries are required for the successful start of the electric drill, or four 5C-10C power batteries (ordinary 18650 cannot start the drill!). ) ! OV and 8.4V cables, using more than 2 square millimeters of copper wire (no nickel plates!).

Note 2: Connect 0V, 4.2V, and 8.4V in strict accordance with the diagram. When the battery is connected for the first time, it needs to be charged before output.

Note 3: When the battery is charged, the "430" resistance heating is a normal phenomenon, indicating that the equalization circuit is working normally; If the "430" resistor is also heated when it is not charging, check whether the wrong line is connected.

Note: Do not mix good batteries with bad batteries!2 cells of battery capacity/internal resistance should be as close as possible!

Lithium battery protection board has a variety of current specifications and other specifications; The more batteries are connected in series, the greater the voltage, the more batteries are connected in parallel, the larger the battery capacity, and the greater the discharge current;

For example, if the working current of the 1S 6A protection board is 6A, if the working current of the electrical appliances you usually use is 5A and below, then you can shoot the 6A protection board; The working current of the electrical appliance is large, and the protection board with high current is taken according to the demand;

In addition, the maximum discharge current of the battery pack is related to the performance of the battery, not that the discharge current of the battery pack can reach 10A with a 10A protection board; Maximum discharge current = multiple of battery capacity x battery discharge coefficient C;

For example, A 18650 BATTERY WITH A CAPACITY OF 3400MAH HAS A DISCHARGE CAPACITY OF 2C; Maximum discharge current = 3400÷1000*2 = 7.4A; 3 strings of 2 and 6 such battery packs;

The maximum discharge current can reach 40A; 1: Wiring 0V (B-), 3.7V (B1), 7.4V (B2), 11.1V (B3), 14.8V (B+) strictly according to the diagram, do not deliberately short circuit!

Note 2: After connecting the cable, you need to charge it first before there will be output.

Note 3: When connecting 4 groups of batteries in series, please ensure that the voltage of each group of batteries is the same, if it is different, please fill each group of batteries separately and then use them in series. During the discharge test, the group of cells with a fast voltage drop is a poor battery.

Charging Voltage: 8.4V - 9.0V Continuous Discharge Current (Maximum): 20A (If the cooling environment is not good, reduce the load current use) Continuous charging current (upper limit): 10A.
Standard Version: Suitable for rigs with currents up to 25A below 50W or resistive loads below 168W. Balanced type: suitable for electric drills below 25A and below 50W, or a start-up current of a resistive load of less than 168W with balanced charge.
Note 1: Two 10C-20C power batteries are required for the successful start of the electric drill, or four 5C-10C power batteries (ordinary 18650 cannot start the drill!). ) ! OV and 8.4V cables, using more than 2 square millimeters of copper wire (no nickel plates!).
Note 2: Connect 0V, 4.2V, and 8.4V in strict accordance with the diagram. When the battery is connected for the first time, it needs to be charged before output.
Note 3: When the battery is charged, the "430" resistance heating is a normal phenomenon, indicating that the equalization circuit is working normally; If the "430" resistor is also heated when it is not charging, check whether the wrong line is connected.
Note: Do not mix good batteries with bad batteries!2 cells of battery capacity/internal resistance should be as close as possible!