2 string/3 string/4 string 40W high -power fast charger Lithium battery charging module soft bag polymer battery pack

The charging current is 3A, and the charging power is calculated based on the battery string voltage. For example, the current voltage of the battery is 12V, and the power = 12*3A is 36W.Note that this charging board is a lower -voltage type, and the input voltage is greater than the battery string full of power voltage.

Work input voltage range: 5V to 26V (need to be higher than the battery voltage)

Support 1-4 string lithium ion battery

Resistance adjustment charging current (input terminal and battery side)

3A maximum charging current

Resistance adjustment input under pressure protection

Enter over pressure, owed pressure protection

Over -temperature protection of the whole machine

Output overcurrent, over pressure, short -circuit protection

This module charges 1 string to 4 string lithium battery modules, and is settled.The maximum support of the current is 3A. If the charging power is charged, it is calculated according to the battery voltage. For example, when the current voltage of the battery is 13V, it is 39W by 3A. This power is relatively large.Power, ensure that the compatibility of the entire charging system pays attention to the lower voltage type, and the input voltage should be higher than the voltage value of your battery full.That is to say, it is generally greater than 4.2V to set the voltage of the battery string.

The two forms on the left correspond to the battery charging current settings and input current limit settings. The charging current is set up with two parallel 50K resistors., Small value of the battery -side charging current set at the charging current and the input terminal charging current.

Enter: Anti -voltage type, the input voltage is higher than the voltage value of your battery full.That is to say, it is generally greater than 4.2V to set the voltage of the battery string.To ensure the compatibility performance of the power supply, the input current limit can be set on the production test.The board was default to a 75K and a 50K (Inn), which corresponds to 1.5A and 1.5A currents in total 2.5A.Other input current values ​​can be changed to the resistance by itself. The calculation formula is: resistance R = 75K/input current A.

Output: Support 1 string to 4 strings, the battery needs to be added with a protective board, the number of connectors is directly connected, and the above diagram is set.The default charging current is set up with two parallel 50K resistors, each corresponding to 1.5A current, a total of 3A. After removing one of them, 1.5A, other current values ​​can be changed to the resistance set. The calculation formula is: resistance R = 75K/battery currentA. Can't exceed 3A.

The actual charging current takes the small value of the battery -side charging current and the input terminal charging current.The charging power is equal to the real -time voltage of the battery multiplied by the application.Large power, ensure the wiring welding, the wire is thick enough, and the power supply power is sufficient.

NTC access: Normally not in use. If necessary, change the NTC resistance resistance value to 82K ​​(the resistor in the lower left corner of the "SCL" word), NTC welding point and GND next to the next GND access 100K thermal resistance (B = 4100).

LED indicator: light flashing when charging

Set up battery charging current, default 3A to remove the IB resistor set to 1.5A

Enter the maximum current settings, default 2.5A to remove the INN resistor set to 1A