Charging the series lithium battery directly through a 5V charger can greatly improve the utilization rate of the charger. After all, cell phone chargers are now available and it seems unnecessary to purchase a dedicated lithium battery balancing charger.
The general solution for charging a series-connected lithium battery is to increase the voltage by 5 V via a boost module, then charge it.
After connecting 9 3.7V lithium polymer fast batteries in series, I used 3 charging stations to charge with a 12V charger. How to connect the battery cables to the battery port charging?
When charging with a special charger for non-lithium battery, you should pay attention to one thing: lithium batteries must have their own lithium battery protection circuit.
If there is no protection circuit, the lithium battery may be overchargedcharged while charging, and the lithium battery may explode if the consequences are serious...
Generally, the saturation voltage of lithium batteries is 4.2 volts.
Therefore, when two identical lithium batteries are charged in series, a voltage greater than 8.4 volts must be supplied; Typically, a regulated power supply with an output of 10-12 volts can be used for charging.
When charging lithium batteries, also be careful: avoid using pulsed voltage charging.
The first method is to connect three chargers in series to charge the battery (note that if one charger loses power in the middle, it can cause the charger to burn out)
p>The second method The first method consists of connecting a wire from the battery to the negative terminal of charger no. 1, then to the positive terminal of the third battery counting from the negative terminal of the batlaughs; from charger no. 2 to the positive terminal of charger no. 1. On the battery, connect a wire from the positive terminal of the 6th battery to the positive terminal of charger no. 2; connect the negative terminal of charger no. 3; charger to the positive terminal of charger #2, and connect it to the positive terminal of the 9th battery (the positive terminal of the battery). Connect a wire to the positive terminal of charger #3 to charge. As the picture shows:
Note that the three chargers should be: 12.6V constant current and constant voltage charger