4 layers51 × 77 mm
2 layers32.3 × 11.5 mm
Battery Management
SingularTeabag/Battery-ManagementA Repository for Battery Management PCBs
- Size
- 32.3 × 11.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 21
- Pads
- 99
- Tracks, vias
- 160, 22
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 9 Sep 2026
- Updated
- 17 Sep 2026
Overview
Battery Management is an open-source printed circuit board by SingularTeabag, from the SingularTeabag/Battery-Management repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 32.3 × 11.5 mm with 34 parts on 21 nets, routed with 160 tracks and 22 vias.
It is built around the BQ25185DLHR and MAX17048G+T10. Its parts include 14 connectors, 9 resistors, 7 capacitors, 3 ICs and 1 inductor. It belongs with the power boards of this library.
Main components
2
BQ25185DLHR
WSON-10-EP(2.2x2)-40℃~+125℃ 1 1A 2.2V 3V~18V 4.4V 4uA Charging IC Lithium Battery、LiFePO4 Battery Support WSON-10-EP(2.2x2) Battery Management ROHSTexas InstrumentsBattery Management
MAX17048G+T10
DFN-8-EP(2x2)-40℃~+85℃ 1 2.5V~4.5V 3uA I2C Lithium Battery Not supported Not supported DFN-8-EP(2x2) Battery Management ROHSMaxim Integrated (Analog Devices)Battery Management
README
README.mdBattery-Management
A repository to organize my battery management PCBs
Single Cell 5 Volt Regulator
Chips used
- BQ25185DLHR - Battery Charging
- TPS61023DRLT - Voltage Regulation
- MAX17048G - Fuel Gauge
About
This PCB is my first "real" PCB that I've designed from scratch using the datasheets of the three respective chips. That aside this PCB is intended for easy battery support for prototyping with microcontroller development boards that require a stable 5 volt input. The board breaks out STAT1, STAT2, CE, and TS from BQ25185DLHR to allow data and control to the used microcontroller, and an external thermistor for battery safety. The board additionally has two pins meant to be used for an external on/off switch, marked on the back silkscreen. Like the battery charging IC the fuel gauges' data signals are also broken out to intended for use with the microcontroller. The USB type C port does not have it's data plus and data minus pins broken out, these are used as a differential pair which requires both wires to be exactly the same length and require impedance matching which all goes out the window when using external wires.
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | Conn_01x01_Pin | Custom Footprints:Connector Hole | J1, J3, J5, J6, J7, J8, J9, J10, J11, J12, J13 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C4 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C2, C3 |
| 2 | 22uF | Capacitor_SMD:C_0603_1608Metric | C5, C6 |
| 2 | 4.7K | Resistor_SMD:R_0603_1608Metric | R8, R9 |
| 2 | 5.1K | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | Conn_01x01_Pin | Custom Footprints:Ground Hole | J2, J4 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 100K | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 10K | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 1K | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 1uH | Inductor_SMD:L_APV_ANR4030 | L1 |
| 1 | 5K | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 732K | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | BQ25185DLHR | BQ25185DLHR:IC_BQ25185DLHR | U1 |
| 1 | MAX17048G | MAX17048G_:SON50P200X200X80-9N | U3 |
| 1 | TPS61023DRLT | TPS61023DRLT:SOT50P160X60-6N | U2 |
| 1 | USB_C_Plug_USB2.0 | Connector_USB:USB_C_Receptacle_JAE_DX07S016JA1R1500 | P1 |
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Questions
How big is the Battery Management PCB?
It measures 32.3 × 11.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Battery Management use?
34 parts, built around the BQ25185DLHR and MAX17048G+T10. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Battery Management KiCad files?
From the SingularTeabag/Battery-Management repository on GitHub, at the commit this page was made from: the board is Single Cell 5 Volt Regulated/Battery Management.kicad_pcb and its schematic Single Cell 5 Volt Regulated/Battery Management.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Battery Management design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).