I am using the panasonic ncr18650pf battery in a 4s pack for my project and I want it incorporate a BMS with balance lead charging. I have already ordered the batteries and holders but I have never built a battery pack so what should the BMS be rated for (amps).

Here is a link to the datasheet. https://datasheetspdf.com/pdf/955257/Panasonic/NCR18650PF/1

  • 2
    \$\begingroup\$ The building of battery packs by the inexperienced is highly suspect and dubious. To do this you'd first have to identify the expected current draw of whatever you are trying to power - key information that is currently missing from your question. But you really should re-consider the lacking wisdom of attempting this project at all. \$\endgroup\$ Commented Nov 17, 2020 at 23:34
  • \$\begingroup\$ The current draw is about 2600 mA and I understand the concern but I still plan to build it \$\endgroup\$ Commented Nov 18, 2020 at 2:42
  • \$\begingroup\$ Take the higher of the peak load current and peak charge current, add a margin (at least 20%) and use that number for the minimum BMS rating. \$\endgroup\$ Commented Nov 19, 2020 at 23:36
  • \$\begingroup\$ thank you for the help \$\endgroup\$ Commented Nov 20, 2020 at 17:17


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