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I am looking into getting a battery protection circuit for the 3S LiPo pack I am planning on using in my project. Max current draw will be 5-6A. Since I think it's more efficient to buy something prebuilt I was looking on aliexpress for something that I could use.

However most of the parts sold there are specified as for 18650 battery pack usage. Here is an example:

Protection circuit

Can I use this kind of circuit with a LiPo pack? Do I need to connect the battery + to B+, the battery - to B- and then connect 2 wires of the balance cables to B1 and B2, or am I completely wrong?

Since the circuit is rated a 8A it will be more than sufficient for my needs

Thanks

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  • \$\begingroup\$ What do you mean for battery protection? What do you want it to do exactly? I don't read German so have no idea what this is. What are you wanting to actually do? \$\endgroup\$ – MCG Jan 30 '18 at 11:00
  • \$\begingroup\$ All the information you need is in the product description. The title "3 S 8A 11.1 V lipo lithium Polymer BMS/PCM/PCB" and voltage specs tell you it is designed for Lipos, and the connection instructions tell and show you how to wire the battery to it. \$\endgroup\$ – Bruce Abbott Jan 30 '18 at 11:20
  • \$\begingroup\$ Protection for LI- cell packs always means the same: protect against undervoltage, overvoltage and also against cell imbalance. \$\endgroup\$ – gommer Jan 30 '18 at 11:21
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Do not worry about the 18650 part of the spec. That's only a cell form factor.

If you have a Li-cell pack that brings out the cell balancing connections, then it'll be just fine. Your assumptions about how to connect it are correct.

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