0
\$\begingroup\$

TP4056 Module

I am using TP4056 module to charge 4 Li-ion cells in series using 4 of the modules. Red wires in the diagram represent wires for positive terminals and black wires from the negative terminal while blue wires and green wire used for connections.

Now when I tried charging with this circuit the circuit burned out and TP4056 and other components in the module started emitting flames and obviously, the circuit failed to do what it was supposed to do.

If anyone could tell me the right circuit or changes I can make in the present circuit. I have already considered problems like circuit getting short or too much input and taken care of that already yet the circuit failed and when tested for 2 cells in series it worked fine but failed of 4 cells.

Thank you

Charging Connection diagram

\$\endgroup\$
5
  • 2
    \$\begingroup\$ As Bimpelrekkie says, you would need an isolated power supply for each TP4056 & cell combination. While this is not a usual method it is valid and the cells will charge to the same final voltage within the matching of the supplies. \$\endgroup\$
    – Russell McMahon ♦
    Jan 11, 2021 at 10:25
  • \$\begingroup\$ How can I use the same power supply for each of the TP4056 and also not short the circuit? Will a resistor of 5K help if I apply it between the connections of - input terminal of each TP4056? \$\endgroup\$
    – Tushar Dubey
    Jan 11, 2021 at 13:03
  • 1
    \$\begingroup\$ You can't, with the batteries in series. You could disconnect them completely from the series circuit, then you could charge them. But a proper charger for series cells would be much better and simpler. \$\endgroup\$
    – user_1818839
    Jan 11, 2021 at 13:10
  • 1
    \$\begingroup\$ @TusharDubey You need to understand what you are being told and what makes it impossible in the manner you are trying. Each cell is at a different voltage above battery negative. The input charging voltage is ground referenced. The chargers must be referenced such that charger -ve = battery -ve. Understand that and you will see why you need isolated charging supplies. \$\endgroup\$
    – Russell McMahon ♦
    Jan 11, 2021 at 22:27
  • \$\begingroup\$ @RussellMcMahon thanks for your help and I appreciate the efforts you put to make understand the basic concepts of working. \$\endgroup\$
    – Tushar Dubey
    Jan 12, 2021 at 4:22

1 Answer 1

Reset to default
5
\$\begingroup\$

This is NOT going to work!

The - input and - output of the TP4056 module are connected and that will short your battery. I have indicated one of the shorts in purple:

enter image description here

To be able to charge 4 cells in series with 4 TP4056 modules you would need 4 separate, isolated power supplies.

But I would not recommend that. The proper way to charge 4 cells in series is by using a charger that is designed for that task. It should include balancing so that all cells will be charged to the same voltage despite differences in capacity between the cells.

\$\endgroup\$
1

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.