Module description:
TP4056 charging board with DW01 protection, overshoot and overdischarge protection, safer and more assured
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Parameter:
The input terminal has a MICRO USB female socket, which can be directly used as an input to charge the lithium battery with a mobile phone charger, and there are still input voltage wiring solder points, which can be very convenient for DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ±1%
Maximum charging current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 26.06*14.47 MM
It can be used for charging and discharging protection of 18650 lithium batteries such as 3.6V 3.7V, polymer and other lithium batteries, single or multiple parallel connection can also be used.
Note:
When the battery is connected for the first time, there may be no voltage output between OUT+ and OUT-. At this time, the protection circuit can be activated by charging it with a 5V voltage. If the battery is short-circuited from B+ B- and then connected Need to charge to activate the protection circuit. When using a mobile phone charger as input, please note that the charger must be able to output 1A or above, otherwise it may not be able to charge normally. The MINI USB socket and the +-pad next to it are the power input terminals, which are connected to 5V voltage. B+ is connected to the positive electrode of the lithium battery, and B- is connected to the negative electrode of the lithium battery. OUT+ and OUT- are connected to the load, such as the positive and negative poles of the mobile booster board or other loads.
Connect the battery to B+ B-, insert the mobile phone charger into the USB socket, D1 is on when charging,
Full D2 light is on. (When the D2 light is on and D1 flashes fast, it means it is almost saturated.) Current adjustment (adjust the resistance of R2,122)
Application:
This module is used for single-cell lithium battery or multi-cell parallel lithium battery charging. The charging port can take power from USB.
Instructions/Precautions:
1. The ammeter for testing current can only be connected in series to the 5V input terminal of the charging board.
2. The charging current is preferably 0.37C of the battery capacity, which is 0.37 times the capacity. For example, a 1000mAH battery charging current of 400 is sufficient. If the charging speed is too large, the effect will be poor, and the battery voltage will drop more after charging!
3. The charging connection wire cannot be too thin or too long. This connection resistance is large. If it is too thin, the battery voltage will drop more after charging.
4. It is better to have a good contact with the battery. Otherwise, the battery voltage will drop more after charging.
5. If the input voltage of 5V is too high, such as 5.2 or even 5.5, the charging current will be less than 1000mA, which is normal. When the voltage is high, the chip heats up and the charging current is automatically reduced to prevent the chip from burning. It is normal for the chip to heat up around 60 degrees during operation. After all, the charging current is large.
6. Input reverse connection has no effect on the chip, but output (battery end) reverse connection will burn the chip.
