CellKeeper-BMS

clowrey·CellKeeper-BMS-PCB

About the CellKeeper-BMS PCB

CellKeeper-BMS is an open source RP2040/RP2350 PCB design by clowrey, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 306 × 113 mm, with 423 components from 84 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. Other key parts include the UCC27524DR, TPS5430DDAR, F0505S-1WR3, ISO1050DUB and LTV-217-B-G. By type, the board carries 138 resistors, 114 capacitors, 50 diodes, 35 jumpers, 25 ICs and 23 connectors.

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

From the project

PCB for the CellKeeper BMS

KiCad PCB design for the CellKeeper Battery Management System, a replacement BMS controller for battery packs using the isoSPI protocol.

- MCU: Raspberry Pi RP2354B (dual Cortex-M33 @ 150 MHz) - Current sensing: TI INA228 (20-bit ADC, shunt-based) - Pack voltage: 6-channel monitoring via precision dividers - BMB communication: isoSPI master with galvanic isolation (Manchester encoding via PIO) - CAN bus: 500 kbps, hardware transceiver - Contactor control: 4-channel PWM outputs with inrush limiting - Input: 12 V nominal; rated for up to 400 V DC pack voltage

CellKeeper-BMS, from the project README — From the project README

Main components on the CellKeeper-BMS

UCC27524DR TPS5430DDAR F0505S-1WR3 ISO1050DUB LTV-217-B-G RP2354B ISO1540 INA228 ADS1115 SP3485EN-L AM26LV32EIDR TLV1117LV33DCYR RaspberryPi_Pico

CellKeeper-BMS bill of materials (BOM)

423 components, 84 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
2	UCC27524DR	Package_SO__SOIC-8_3.9x4.9mm_P1.27mm	U1, U11
1	TPS5430DDAR	Package_SO__TI_SO-PowerPAD-8_ThermalVias	U3
2	F0505S-1WR3	BMS_Library__H0505S-1WR2	U4, U15
2	ISO1050DUB	Package_SO__SOP-8_6.62x9.15mm_P2.54mm	U5, U10
6	LTV-217-B-G	Package_SO__SSOP-4_4.4x2.6mm_P1.27mm	U6, U7, U8, U9, U12, U13
2	RP2354B	RP2350_80QFN_minimal__RP2350-QFN-80-1EP_10x10_P0.4mm_EP3.4x3.4mm_ThermalVias	U14, U20
1	ISO1540	Package_SO__SOIC-8_3.9x4.9mm_P1.27mm	U16
1	INA228	Package_SO__TSSOP-10_3x3mm_P0.5mm	U17
2	ADS1115	Package_SO__TSSOP-10_3x3mm_P0.5mm	U18, U19
2	SP3485EN-L SP3485EN-L/TR	Package_SO__SOIC-8_3.9x4.9mm_P1.27mm	U21, U23
2	AM26LV32EIDR	Package_SO__SOIC-16_3.9x9.9mm_P1.27mm	U22, U24
2	TLV1117LV33DCYR	Package_TO_SOT_SMD__SOT-223-3_TabPin2	U25, U26
1	RaspberryPi_Pico	Module__RaspberryPi_Pico_Common_Unspecified	A1
4	BSC0805LS	BMS_Library__TDSON-8_5x6_	Q1, Q2, Q3, Q4
2	ABM8-272-T3	Crystal__Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1, Y2
1	SCREW_TERMINAL_01X04 Screw_Terminal_01x04	BMS_Library__PhoenixContact_MC_1_5_4-G-3.81_1x04_P3.81mm_Horizontal_1.4mmPin	J1
1	SCREW_TERMINAL_01X01 Screw_Terminal_01x01	BMS_Library__XFCN_T34008_M3_Terminal_Frame_PCB	J2
3	Screw_Terminal_01x04	BMS_Library__PhoenixContact_MC_1_5_4-G-3.81_1x04_P3.81mm_Horizontal_1.4mmPin	J3, J7, J15
2	8P8C_LED_SHIELDED_X2 8P8C_LED_Shielded_x2	Connector_RJ__RJ45_HCTL_HC-RJ45-5JA-2-2-Y	J4, J5
1	OEM Connector	BMS_Library__S44BRAD1AK	J6

Show 64 more

Qty	Part	Footprint	Refs
2	Conn_01x03	Connector_PinHeader_2.54mm__PinHeader_1x03_P2.54mm_Vertical	J8, J16
3	USB_C_RECEPTACLE_USB2.0_16P USB_C_Receptacle_USB2.0_16P	BMS_Library__USB_C_Receptacle_HRO_TYPE-C-31-M-12	J9, J11, J19
1	3.81P Screw Terminal	BMS_Library__PhoenixContact_MC_1_5_8-G-3.81_1x08_P3.81mm_Horizontal_1.4mmPin	J10
2	Conn_02x10_Odd_Even	Connector_PinHeader_2.54mm__PinHeader_2x10_P2.54mm_Vertical	J12, J22
1	C17284895 OEM Shunt Connector	BMS_Library__CONN_ZE05H-8DP-2H_HIR	J14
1	C573648 OEM HV Sense Connector	BMS_Library__CONN_173864-1_TYC_Empty_Pins	J17
1	7.62mm Pitch Screw Terminal	Connector_Phoenix_GMSTB__PhoenixContact_GMSTBA_2_5_6-G-7_62_1x06_P7.62mm_Horizontal	J18
2	C587318 OEM Connector	BMS_Library__CONN_SD-34912-001_02_MOL	J20, J23
2	3.81P Screw Terminal	BMS_Library__PhoenixContact_MC_1_5_2-G-3.81_1x02_P3.81mm_Horizontal_1.4mmPin	J21, J24
7	TP	BMS_Library__TestPoint_THTPad_D1.5mm_Drill1.0mm	1/2V1, 3v1, 5V1, GND1, GPIO1, GPIO2, GPIO3
2	SDCW3225S-2-102TF	BMS_Library__FILTER-SMD_4P-L3.2-W2.5-BL	FL1, FL2
29	0r	BMS_Library__J_0603_jumper	JP1, JP2, JP3, JP4, JP7, JP8, JP9, JP12 +21
6	C21189 0r	BMS_Library__J_0603_jumper	JP5, JP6, JP10, JP11, JP15, JP36
4	TS-1187A-B-A-B	Button_Switch_SMD__SW_Push_1P1T_XKB_TS-1187A	SW1, SW2, SW3, SW4
6	B59451C1130B070	BMS_Library__RV_Disc_D15.5mm_W7.5mm_P5.0mm	TH1, TH2, TH3, TH4, TH5, TH6
2	HM2113ZNLT	BMS_Library__HM2113ZNLT	TR1, TR2
13	SMB6.8CA	Diode_SMD__D_SMB	D1, D2, D3, D4, D5, D6, D24, D25 +5
9	C2297 Green	LED_SMD__LED_0805_2012Metric	D7, D8, D14, D19, D32, D35, D36, D43 +1
6	C84256 Red	LED_SMD__LED_0805_2012Metric	D9, D10, D27, D41, D46, D49
12	SS54	Diode_SMD__D_SMA	D11, D12, D15, D16, D20, D23, D37, D38 +4
6	C34499 White	LED_SMD__LED_0805_2012Metric	D13, D17, D22, D33, D34, D45
4	SMCJ33CA	Diode_SMD__D_SMC	D18, D21, D39, D40
3	C1002 600R@100MHz	Inductor_SMD__L_0603_1608Metric_Pad1.05x0.95mm_HandSolder	FB1, FB3, FB5
1	C14709 120Ω@100MHz	Capacitor_SMD__C_0603_1608Metric	FB2
2	6.8UH 6.8uh	Inductor_SMD__L_Changjiang_FXL0630	L1, L5
2	C475917 22uh 5.5A	Inductor_SMD__L_Changjiang_FXL1040	L2, L3
2	3.3UH 3.3uh	RP2350_80QFN_minimal__L_pol_2016	L4, L6
3	680UF 680uF	Capacitor_THT__CP_Radial_D10.0mm_P5.00mm	C1, C14, C31
29	100NF 100nF	Capacitor_SMD__C_0603_1608Metric	C2, C10, C11, C13, C15, C16, C18, C22 +21
8	10UF 10uF	Capacitor_SMD__C_0805_2012Metric	C3, C4, C6, C8, C17, C21, C32, C55
8	22UF 22uF	Capacitor_SMD__C_0805_2012Metric	C5, C7, C12, C33, C37, C48, C49, C69
1	4.7UF 4.7uF	Capacitor_SMD__C_0603_1608Metric	C9
14	1UF 1uF	Capacitor_SMD__C_0603_1608Metric	C19, C20, C41, C42, C57, C67, C96, C97 +6
6	100PF 100pF	Capacitor_SMD__C_0603_1608Metric	C24, C25, C26, C27, C103, C113
4	4.7U 4.7u	RP2350_80QFN_minimal__C_0402_1005Metric_small_pads	C38, C43, C68, C72
4	15PF 15pF	Capacitor_SMD__C_0402_1005Metric	C39, C40, C70, C71
24	100N 100n	Capacitor_SMD__C_0402_1005Metric	C44, C46, C47, C50, C51, C53, C56, C58 +16
4	4.7U 4.7u	Capacitor_SMD__C_0402_1005Metric	C45, C52, C82, C87
4	100NF 100nf	Capacitor_SMD__C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C62, C64, C73, C74
1	10UF 10uF	Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C66
4	1NF 1nF	Capacitor_SMD__C_1206_3216Metric	C94, C95, C107, C108
17	24K 24k	Resistor_SMD__R_0603_1608Metric	R1, R2, R11, R16, R29, R33, R35, R39 +9
11	10K 10k	Resistor_SMD__R_0603_1608Metric	R3, R4, R15, R19, R20, R21, R25, R28 +3
6	100K 100k	Resistor_SMD__R_0603_1608Metric	R5, R10, R18, R24, R34, R36
4	33R	Resistor_SMD__R_0603_1608Metric	R7, R12, R37, R38
11	1k	Resistor_SMD__R_0603_1608Metric	R8, R9, R22, R23, R46, R47, R48, R49 +3
4	10K 10k	Resistor_SMD__R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R13, R14, R51, R52
1	24K 10k	Resistor_SMD__R_0603_1608Metric	R17
1	3.3K 3.3k	Resistor_SMD__R_0402_1005Metric	R26
13	1k	Resistor_SMD__R_0402_1005Metric	R27, R53, R55, R56, R74, R92, R94, R95 +5
2	510R 510r	Resistor_SMD__R_0603_1608Metric	R30, R73
2	120R 120r	Resistor_SMD__R_1206_3216Metric	R31, R32
2	2.2K 2.2k	Resistor_SMD__R_0603_1608Metric	R43, R44
18	5.1K 5.1k	Resistor_SMD__R_0603_1608Metric	R45, R57, R66, R69, R72, R77, R79, R80 +10
4	33R 33r	Resistor_SMD__R_0402_1005Metric	R54, R68, R93, R126
4	22R	Resistor_SMD__R_0402_1005Metric	R70, R71, R127, R128
1	47k	Resistor_SMD__R_0603_1608Metric	R75
1	C21189 0r	Resistor_SMD__R_0603_1608Metric	R76
2	220R 220r	Resistor_SMD__R_0603_1608Metric	R87, R88
24	3M	Resistor_SMD__R_1206_3216Metric	R102, R103, R104, R105, R106, R107, R108, R109 +16
4	47R 47r	Resistor_SMD__R_0603_1608Metric	R136, R137, R148, R149
2	100R	Resistor_SMD__R_0603_1608Metric	R142, R150
2	1M	Resistor_SMD__R_1206_3216Metric	R145, R146
2	100k	Resistor_SMD__R_0603_1608Metric	R151, R152

CellKeeper-BMS design files

The KiCad project lives in the clowrey/CellKeeper-BMS-PCB repository on GitHub; these links point at the commit this page was built from.

CellKeeper-BMS: common questions

What microcontroller does the CellKeeper-BMS use?

The CellKeeper-BMS is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the CellKeeper-BMS PCB?

The CellKeeper-BMS measures 306 × 113 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the CellKeeper-BMS?

423 components, from 84 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 CellKeeper-BMS design files?

From the clowrey/CellKeeper-BMS-PCB 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 CellKeeper-BMS design in my own project?

Yes, under the terms of its GPL-3.0 license, which clowrey chose for the repository.

Can I test firmware for the CellKeeper-BMS without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.