Boards in 3 GitHub repositories, designed in KiCad, that use the BQ40Z50RSMR-R2 by Texas Instruments (-40℃~+85℃ 1~4 2.2V~26V 336uA Lithium Battery Protection IC、Monitoring IC SMBus Support VQFN-32-EP(4x4) Battery Management ROHS). See how each wires it, with its parts, size, README and files; the BQ40Z50RSMR-R2’s symbol, footprint and pinout are on its own page.
8aChristian/-Smart-Multi-Cell-BMS-USB-C-Power-Delivery-Hub-2S-3S-45W-65W-
The Smart Multi-Cell BMS & USB-C Power Delivery Hub is an industrial-grade, high-reliability power management hardware system designed for high-performance multi-cell portable devices, robotics, industrial IoT, and…
MidwestMotorBoy/Battery-Bank
Monolith: an ultralight IP67 power bank for backpacking. 4S BAK 65E 21700 (91 Wh, under the 100 Wh airline limit), two bidirectional 100 W USB-C PD ports, Bluetooth LE (TI CC2340) with an iPhone app.