ESP32 battery management module
About the ESP32 battery management module
ESP32 battery management module is an open source ESP32 PCB design by KomplexKapharnaum, published on GitHub under the MIT license. It is a 4-layer board measuring 56.5 × 57.5 mm, with 98 components from 52 distinct parts.
Its main chip is the ESP32-WROOM, from the ESP32 family. Other key parts include the SP3485CN, MCP16331T-E/CH, BTS50080-1TEA, DC_DC_POL and STM32F030F4PX. By type, the board carries 37 resistors, 18 capacitors, 15 diodes, 11 connectors, 6 ICs and 5 transistors.
It belongs with the audio and power & battery designs in this gallery.
From the project
KiCad EDA files for KXKM ESP32 Audio & battery project
To Panelize: Install Kikit (at least the module, no need to install in kicad via PCM)
Main components on the ESP32 battery management module
ESP32 battery management module bill of materials (BOM)
98 components, 52 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM | ESP32-WROOM-32U | U1 |
| 1 | SP3485CN | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | MCP16331T-E/CH | SOT-23-6 | U3 |
| 1 | BTS50080-1TEA | TO-252-4 | U4 |
| 1 | DC_DC_POL | DC_DC_Buck_module_22x17mm | U5 |
| 1 | STM32F030F4PX STM32F070F6Px | TSSOP-20_4.4x6.5mm_P0.65mm | U7 |
| 2 | BC847W | SOT-323_SC-70 | Q1, Q2 |
| 3 | 2N7002 | SOT-23 | Q4, Q5, Q6 |
| 1 | CONN_01X06 Conn_01x06 | PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | Conn_02x10_Odd_Even | Samtec_HLE-110-02-xxx-DV-LC_2x10_P2.54mm_Horizontal_bis | J3 |
| 1 | CONN_01X02 Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | CONN_01X03 Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J6 |
| 2 | Conn_01x03 | JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J7, J8 |
| 1 | XT60PW-M | AMASS_XT60PW-M | J10 |
| 1 | Conn_01x02_Socket | PinHeader_1x02_P2.54mm_Vertical | J12 |
| 2 | Wire pad | SolderWirePad_1x01_Drill2mm | J15, J16 |
| 1 | TC_SWD | Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | P1 |
| 1 | 0.5A/30V | Fuse_1812_4532Metric | F1 |
| 1 | SW_Push | SW_SPST_KMR2 | SW1 |
| 1 | SW_DIP_X03 SW_DIP_x03 | SW_DIP_SPSTx03_Piano_CTS_Series194-3MSTN_W7.62mm_P2.54mm | SW2 |
Show 32 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SW_Push | SW_Tactile_SPST_Angled_PTS645Vx31-2LFS | SW3 |
| 1 | SW_SP3T | SW_SP3T_PCM13 | SW4 |
| 4 | 1N4148WT | D_SOD-523 | D1, D4, D12, D15 |
| 3 | ZENER/3V/300MW Zener/3V/300mW | D_SOD-323 | D2, D13, D14 |
| 2 | 1A/100V | D_SMA | D3, D11 |
| 3 | Green | LED_0603_1608Metric | D5, D6, D7 |
| 2 | Yellow | LED_0603_1608Metric | D8, D9 |
| 1 | Red | LED_0603_1608Metric | D10 |
| 1 | 15uH,1.5A | L_Taiyo-Yuden_NR-50xx | L1 |
| 1 | 1UF 1uF | C_0603_1608Metric | C1 |
| 6 | 0.1UF 0.1uF | C_0603_1608Metric | C2, C3, C7, C22, C23, C24 |
| 2 | 10UF/50V 10uF/50V | C_1206_3216Metric | C4, C5 |
| 1 | 100uF,50V | CP_Elec_8x10 | C6 |
| 1 | 20PF 20pF | C_0603_1608Metric | C8 |
| 2 | 10UF 10uF | C_0805_2012Metric | C9, C10 |
| 1 | 1UF 10uF | C_0805_2012Metric | C11 |
| 1 | 10uF | C_0805_2012Metric | C12 |
| 1 | 220uF | CP_Radial_D5.0mm_P2.00mm | C13 |
| 1 | 1NF 1nF | C_0603_1608Metric | C21 |
| 1 | 10NF 10nF | C_0603_1608Metric | C26 |
| 2 | 10k/1% | R_0603_1608Metric | R1, R10 |
| 2 | 1k | R_0603_1608Metric | R2, R23 |
| 12 | 10K 10k | R_0603_1608Metric | R3, R4, R5, R6, R11, R17, R18, R19 +4 |
| 1 | 120R | R_0603_1608Metric | R7 |
| 2 | 470R | R_0603_1608Metric | R8, R28 |
| 2 | 31.6k/1% | R_0603_1608Metric | R9, R16 |
| 2 | 1k/1% | R_0603_1608Metric | R12, R22 |
| 4 | DNP | R_0603_1608Metric | R13, R14, R29, R30 |
| 1 | 270k/1% | R_0603_1608Metric | R15 |
| 4 | 100R | R_0603_1608Metric | R24, R25, R26, R27 |
| 1 | 0R | R_0603_1608Metric | R31 |
| 4 | 22K 22k | R_0603_1608Metric | R33, R34, R36, R38 |
ESP32 battery management module design files
The KiCad project lives in the KomplexKapharnaum/KXKM_ESP32_Audio_Battery_hardware repository on GitHub; these links point at the commit this page was built from.
ESP32 battery management module: common questions
What microcontroller does the ESP32 battery management module use?
The ESP32 battery management module is built around the ESP32-WROOM, from the ESP32 family.
How big is the ESP32 battery management module?
The ESP32 battery management module measures 56.5 × 57.5 mm, has 4 copper layers and is 1.599192 mm thick.
How many components are on the ESP32 battery management module?
98 components, from 52 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the ESP32 battery management module design files?
From the KomplexKapharnaum/KXKM_ESP32_Audio_Battery_hardware repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the ESP32 battery management module design in my own project?
Yes, under the terms of its MIT license, which KomplexKapharnaum chose for the repository.
Can I test firmware for the ESP32 battery management module without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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