HardLabs

BMS

buglalis·degree·KiCad/BMS/BMS.kicad_pcb

BMS PCB layout, top view — open source STM32 board by buglalis
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About the BMS PCB

BMS is an open source STM32 PCB design by buglalis, published on GitHub. It is a 4-layer board measuring 103 × 57 mm, with 192 components from 52 distinct parts.

Its main chip is the STM32F405RGTx, from the STM32 family. Other key parts include the ISO1050DUB, B0505MT, ST1S14PHR, LDL1117S33R and TL431A. By type, the board carries 98 resistors, 26 capacitors, 24 ICs, 17 transistors, 8 connectors and 6 diodes.

It belongs with the power & battery designs in this gallery.

Main components on the BMS

STM32F405RGTxISO1050DUBB0505MTST1S14PHRLDL1117S33RTL431AHCPL-063074HC4051MCP3201HCPL-0600

BMS bill of materials (BOM)

192 components, 52 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F405RGTx
U1
1
ISO1050DUB
U2
2
B0505MT
U3, U13
1
ST1S14PHR
U4
1
LDL1117S33R
U5
8
TL431A
U6, U9, U11, U14, U16, U18, U20, U21
4
HCPL-0630
U7, U10, U15, U24
2
74HC4051
U8, U23
2
MCP3201
U12, U22
2
HCPL-0600
U17, U19
8
PNP
Q1, Q3, Q5, Q7, Q9, Q11, Q14, Q16
8
NMOS
Q2, Q4, Q6, Q8, Q10, Q13, Q15, Q17
1
BSS138
Q12
1
Crystal KSE-7U08000MAB143ZA3
Y1
1
PLS-6
J1
1
BH1,27-10-G
J2
2
430450400
J3, J5
1
Conn_01x03
J4
1
430451000
J6
2
430450800
J7, J8
Show 32 more
QtyPartRefs
1
SolderJumper2
JP1
8
10
Rb1, Rb2, Rb3, Rb4, Rb5, Rb6, Rb7, Rb8
1
B3F1060
SW1
1
PESD1CAN
D1
1
BAV16W
D2
4
BZX384-C4V7
D3, D4, D5, D6
1
Дросель EMC
L1
1
6.8u
L2
10
100n
C1, C3, C4, C5, C6, C8, C13, C15 +2
4
4u7
C2, C16, C22, C25
3
1u
C7, C14, C23
2
14p
C9, C10
2
2u2
C11, C12
3
10u
C17, C19, C26
1
150p
C21
1
100u
C24
1
0
R1
14
10k
R2, R4, R19, R29, R39, R49, R59, R62 +6
1
120
R3
1
4k7
R5
1
220
R6
1
3k
R7
10
1m
R8, R16, R25, R36, R42, R46, R52, R65 +2
15
180
R9, R15, R17, R20, R27, R30, R31, R41 +7
7
3m
R10, R11, R21, R22, R33, R43, R50
8
150
R12, R23, R34, R44, R54, R66, R75, R83
8
8.2k
R13, R24, R35, R45, R55, R67, R76, R84
8
220k
R14, R26, R37, R47, R57, R68, R78, R85
8
12k
R18, R28, R38, R48, R58, R70, R80, R86
2
2m
R32, R60
10
R
R40, R88, R89, R90, R91, R93, R95, R96 +2
3
500
R69, R92, R94

BMS design files

The KiCad project lives in the buglalis/degree repository on GitHub; these links point at the commit this page was built from.

BMS: common questions

What microcontroller does the BMS use?

The BMS is built around the STM32F405RGTx, from the STM32 family.

How big is the BMS PCB?

The BMS measures 103 × 57 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the BMS?

192 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 BMS design files?

From the buglalis/degree 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 BMS design in my own project?

The repository has no license, so all rights stay with buglalis. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the 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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