Custom BMS
About the Custom BMS PCB
Custom BMS is an open source STM32 PCB design by SCFormulaElectric, published on GitHub. It is a 4-layer board measuring 104.2 × 59.7 mm, with 192 components from 71 distinct parts.
Its main chip is the STM32F405RGTX, from the STM32 family. Other key parts include the BQ79616PAPRQ1, TPS563300, PBQ79600PWQ1, AMS1117-3.3 and SN65HVD230DR. By type, the board carries 80 capacitors, 71 resistors, 20 diodes, 7 ICs, 7 transistors and 4 inductors.
It belongs with the power & battery designs in this gallery.
From the project
- Update README.md file in each directory with the appropriate changes made - On schematics, please use boxes to section of parts of the circuit and use text boxes to describe functionality
Main components on the Custom BMS
Custom BMS bill of materials (BOM)
192 components, 71 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BQ79616PAPRQ1 | HTQFP-64_L10.0-W10.0-P0.50-LS12.0-BL-EP5.9 | U1 |
| 1 | TPS563300 | SOT-583-8 | U2 |
| 1 | PBQ79600PWQ1 | SOIC_9600PWQ1_TEX | U3 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U4 |
| 1 | SN65HVD230DR Texas Instruments | SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL | U5 |
| 1 | STM32F405RGTX STM32F405RGTx | LQFP-64_10x10mm_P0.5mm | U6 |
| 1 | LM397 | SOT-23-5 | U7 |
| 1 | ZXTN4004KTC | TO-252-2_L6.6-W6.1-P4.58-LS9.9-TL | Q1 |
| 1 | AO3401A | SOT-23 | Q2 |
| 5 | AO3400A | SOT-23 | Q3, Q4, Q5, Q6, Q7 |
| 1 | X50328MSB2GI Yangxing Tech | CRYSTAL-SMD_L5.0-W3.2 | X1 |
| 1 | SMD0805-010-24V | F0805 | F1 |
| 1 | C720477 Tactile Button, 160gf XUNPU | SW_TS-1088-AR02016 | S1 |
| 4 | SM91502ALE | SMD-6_L7.6-W6.9-P2.54-LS8.9-BL | D1, D2, D11, D12 |
| 4 | C15771 PESD1CAN,215 | SOT-23_L2.9-W1.3-P1.90-LS2.4-BR | D3, D4, D5, D7 |
| 1 | C2286 Red Hubei KENTO Elec | D_0603 | D6 |
| 1 | C89811 Yellow Foshan NationStar Optoelectronics | D_0603 | D8 |
| 1 | BZT52C10S hongjiacheng | D_SOD-323 | D9 |
| 1 | ESD2CANFD24DBZRQ1 | SOT-23-3_L2.9-W1.3-P1.90-LS2.3-BR | D10 |
| 1 | C2297 Green Hubei KENTO Elec | D_0805 | D13 |
Show 51 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1N4148WT | D_SOD-523 | D14 |
| 6 | SMF18CA hongjiacheng | D_SOD-123FL | D15, D16, D17, D18, D19, D20 |
| 2 | ACT45B-101-2P-TL003 | FILTER-SMD_4P-L4.5-W3.2-TL_ACT45B | L1, L2 |
| 1 | SRR1206-120ML | IND_BOURNS_SRR1240 | L5 |
| 1 | ACT1210-101-2P-TL00 | FILTER-SMD_4P-L3.9-W2.5-BL | L6 |
| 1 | 4.7UF 4.7uF Samsung Electro-Mechanics | C_0402 | C1 |
| 3 | 1UF 1uF Samsung Electro-Mechanics | C_0402 | C2, C4, C5 |
| 10 | 100NF 100nF Samsung Electro-Mechanics | C_0402 | C3, C6, C29, C42, C62, C63, C64, C78 +2 |
| 1 | 2.2UF 2.2uF Samsung Electro-Mechanics | C_0402 | C7 |
| 25 | 470NF 470nF Samsung Electro-Mechanics | C_0603 | C8, C18, C19, C21, C22, C23, C24, C28 +17 |
| 2 | 20PF 20pF FH(Guangdong Fenghua Advanced Tech) | C_0402 | C9, C71 |
| 3 | 10UF 10uF Samsung Electro-Mechanics | C_0603 | C10, C55, C67 |
| 1 | 4.7NF 4.7nF FH(Guangdong Fenghua Advanced Tech) | C_0603 | C11 |
| 7 | 100NF 100nF YAGEO | C_0603 | C12, C58, C61, C68, C70, C73, C75 |
| 1 | CC0603KRX7R0BB103 | C0603 | C25 |
| 2 | 2.2UF 2.2uF Samsung Electro-Mechanics | C_0603 | C26, C27 |
| 8 | 220PF 220pF Samsung Electro-Mechanics | C_0603 | C43, C44, C48, C49, C53, C54, C56, C57 |
| 4 | 1206B222K102NT | C1206 | C45, C46, C51, C52 |
| 4 | 100PF 100pF Samsung Electro-Mechanics | C_0603 | C47, C50, C83, C84 |
| 3 | 220NF 220nF Samsung Electro-Mechanics | C_0603 | C59, C60, C77 |
| 1 | 4.7UF 4.7uF Samsung Electro-Mechanics | C_0603 | C65 |
| 1 | 1UF 1uF Samsung Electro-Mechanics | C_0603 | C66 |
| 1 | 22UF 22uF Samsung Electro-Mechanics | C_0805 | C69 |
| 2 | 33NF 33nF Samsung Electro-Mechanics | C_0603 | C74, C76 |
| 1 | 300Ω UNI-ROYAL(Uniroyal Elec) | R_1206 | R1 |
| 7 | 100Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R2, R12, R13, R14, R15, R16, R17 |
| 2 | 13kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R3, R19 |
| 2 | 0603WAF604JT5E | R0603 | R4, R5 |
| 1 | 0Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R18 |
| 1 | 9.1kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R21 |
| 7 | RTT12100JTP | R1210 | R26, R27, R28, R29, R31, R32, R33 |
| 1 | 47kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R34 |
| 2 | 1kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R35, R38 |
| 8 | 49.9Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R36, R37, R39, R40, R46, R47, R49, R50 |
| 4 | 680Ω UNI-ROYAL(Uniroyal Elec) | R_0402 | R41, R42, R43, R44 |
| 10 | 1kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R45, R48, R69, R72, R73, R74, R75, R76 +2 |
| 2 | 100kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R51, R52 |
| 1 | 10Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R54 |
| 4 | 10kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R55, R56, R57, R58 |
| 1 | 2.2kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R59 |
| 1 | 10kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R60 |
| 4 | 3kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R61, R63, R65, R79 |
| 2 | 2kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R62, R64 |
| 2 | 2.7kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R66, R68 |
| 1 | 330Ω UNI-ROYAL(Uniroyal Elec) | R_0603 | R67 |
| 1 | 6.2kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R70 |
| 2 | 2kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R71, R82 |
| 1 | CMP2512-FX-1001ELF | R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R77 |
| 1 | 1.2kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R78 |
| 1 | 33Ω UNI-ROYAL(Uniroyal Elec) | R_0402 | R80 |
| 1 | 3.9kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R81 |
Custom BMS design files
The KiCad project lives in the SCFormulaElectric/USC-Electrical-Systems repository on GitHub; these links point at the commit this page was built from.
Custom BMS: common questions
What microcontroller does the Custom BMS use?
The Custom BMS is built around the STM32F405RGTX, from the STM32 family.
How big is the Custom BMS PCB?
The Custom BMS measures 104.2 × 59.7 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Custom BMS?
192 components, from 71 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 Custom BMS design files?
From the SCFormulaElectric/USC-Electrical-Systems 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 Custom BMS design in my own project?
The repository has no license, so all rights stay with SCFormulaElectric. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Custom BMS without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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