2 layers74 × 42 mm
BatteryPack RevA
yakuptrkn42-create/ai_pcb_design
Öneri projesini AIESVideoSchematicReviewR1/Proposal/Project/AIESOneriP1.kicadpro ile KiCad 9'da açın. P1 ERC: 0 hata / 0 uyarı; 157 pin–net eşlemesi kontrol edildi.
78 parts
2 layers38 × 24 mm
A repository for a 2s lithium ion BMS that utilizes the BQ28Z620. This IC is an all-in-one chip that features battery protection, cell balancing, battery charging, battery current and voltage monitoring, and gas gauging through an impedance measurement to give a precise value for charge left.
- Size
- 38 × 24 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 82
- Nets
- 83
- Pads
- 263
- Tracks, vias
- 382, 43
- Pours
- 15
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 9 Apr 2025
- Updated
- 9 Apr 2025
Overview
BMS is an open-source printed circuit board by SMalasGit, from the SMalasGit/2s-BMS repository on GitHub. It is a 2-layer board of 38 × 24 mm with 82 parts on 83 nets, routed with 382 tracks and 43 vias.
It is built around the ATTINY816-MN, BQ28Z610DRZR-R1 and ESDA25P35-1U1M, with the MM3Z5V6C, 150060VS75000 and 2N7002K among its other parts. Its parts include 25 resistors, 16 capacitors, 6 diodes, 5 transistors and 4 ICs. It belongs with the power boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
10
ATTINY816-MN
QFN-20-EP(3x3)-40℃~+105℃ 1.8V~5.5V 10bit 128Byte 18 20MHz 512Byte 8 Bit 8KB 8bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、Built-in general-purpose timer、Hardware CRC、Calendar function、Touch function、Window watchdog (WWDG) VQFN-20-EP(3x3) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
BQ28Z610DRZR-R1
SON-12-EP(2.5x4)-40℃~+85℃ 1~2 2.2V~26V 250uA I2C Lithium Battery Protection IC、Monitoring IC Support SON-12-EP(2.5x4) Battery Management ROHSTexas InstrumentsBattery Management
ESDA25P35-1U1M
DFN1610-2-55℃~+150℃ 1 1.4kW@8/20us 200nA 22V 24.6V 35A@8/20us 41V IEC 61000-4-2 TVS Unidirectional DFN1610-2 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
MM3Z5V6C
SOD-323F1 Independent 200mW 376Ω 37Ω 5.32V~5.88V 5.6V 900nA@2V ±5% SOD-323F Zener Diodes ROHSonsemiZener Diodes
150060VS75000
SMD,1.6x0.8mm-40℃~+85℃ 140° 2.4V 20mA 40mcd 570nm 572nm 72mW Discrete Diode Green SMD,1.6x0.8mm LED Indication - Discrete ROHSWürth ElektronikLight Emitting Diodes (LED)
2N7002K
SOT-23-55℃~+150℃ 1 N-channel 1.2Ω@10V、1.4Ω@5V 1.6V 2.9pF 300pC@4.5V 30pF 380mA 4.2pF 540mW 60V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETsBAS19
SOT-231 Independent 1.25V@200mA 100V 100nA@100V 200mA 250mW SOT-23 Switching Diodes ROHSCBISwitching DiodesCDBQR0130L
SOD-923F-40℃~+125℃ 1 Independent 100mA 10uA@10V 1A 30V 350mV@10mA SOD-923F Schottky Diodes ROHSComchipSchottky Diodes
ESDA25W
SOT-323-3L-40℃~+125℃ 15A 1uA 2 24V 25V 25V 400W 65pF ESD IEC 61000-4-2 Unidirectional SOT-323-3L ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
NTCG103JX103DT1S
0402-40℃~+150℃ 0.5mm 100mW 10kΩ 1mm 3380K 3422K 3435K 3453K ±0.5% ±0.7% 0402 NTC Thermistors ROHSTDKNTC Thermistors
README
README.mdThis chip is rated for 1-2s (cell) operation with lithium ion or lithium polymer batteries. This BMS config is set up for a 5 amp charging current at an 8.4 voltage running, which is supplied via the USB-C port of the BMS. This BMS has built in trip current of 35 amps, and a physical fuse onboard for currents exceeding 25 amps. This helps ensure the safety of the device and battery pack
Parts
82| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100 | Resistor_SMD:R_0402_1005Metric | R5, R7, R11, R12, R13, R14, R15, R17 |
| 7 | 0u1 | Capacitor_SMD:C_0402_1005Metric | C5, C11, C14, C15, C16, C17, C18 |
| 7 | 1u | Capacitor_SMD:C_0402_1005Metric | C2, C3, C4, C6, C7, C8, C10 |
| 2 | 100k | Resistor_SMD:R_0402_1005Metric | R4, R8 |
| 2 | 10M | Resistor_SMD:R_0603_1608Metric | R20, R22 |
| 2 | 4k7 | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R19, R21 |
| 2 | ESDA25P35-1U1M | ESDAP25:TVS_ESDA25P35-1U1M | D4, D5 |
| 2 | MM3Z5V6C | MM3Z5:ZDO_MM3Z5V6C_OSI | CR1, CR2 |
| 2 | TPN1R603P | TPN1R603P:TPN1R603PLL1Q | Q3, Q4 |
| 1 | 0 | Resistor_SMD:R_0201_0603Metric | R25 |
| 1 | 10 | Resistor_SMD:R_0402_1005Metric | R23 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R24 |
| 1 | 150060VS75000 | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | 18k | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 1m | Resistor_SMD:R_2010_5025Metric | R18 |
| 1 | 2.2u | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 2N7002K | Package_TO_SOT_SMD:SOT-23 | Q5 |
| 1 | 330 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 3V3 | Tested:test | TP1 |
| 1 | 470 | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 5 | Resistor_SMD:R_0402_1005Metric | R16 |
| 1 | ALS-PT19 | LED_SMD:LED_0603_1608Metric | Q1 |
| 1 | ATtiny816-M | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U3 |
| 1 | BAS19 | Package_TO_SOT_SMD:SOT-23 | D6 |
| 1 | BAT1N | Tested:test | TP15 |
| 1 | BAT1P/BAT2N | Tested:test | TP14 |
| 1 | BAT2P | Tested:test | TP13 |
| 1 | BQ28Z610DRZR-R1 | BQ28Z610:IC_BQ27441DRZR-G1A | IC1 |
| 1 | CDBQR0130L | Diode_SMD:D_0402_1005Metric | D2 |
| 1 | CELL1N | TestPoint:TestPoint_Pad_D2.0mm | TP7 |
| 1 | CELL1P | TestPoint:TestPoint_Pad_D1.5mm | TP5 |
| 1 | CELL2P | TestPoint:TestPoint_Pad_D2.0mm | TP6 |
| 1 | CHARGE/DISCHARGEN | TestPoint:TestPoint_Pad_D2.0mm | TP19 |
| 1 | CHARGE/DISCHARGEP | TestPoint:TestPoint_Pad_D2.0mm | TP16 |
| 1 | ClockTestPoint | Tested:test | TP10 |
| 1 | DataTestPoint | Tested:test | TP11 |
| 1 | ESDA25W | ESDA25W:SOT65P210X110-3N | D1 |
| 1 | Fuse | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | GndATestPoint | Tested:test | TP12 |
| 1 | MCP1799T-33202H/TT | Package_TO_SOT_SMD:SOT-23 | U1 |
| 1 | MOLEX_105450-0101 | Connector_USB:USB_C_Receptacle_Molex_105450-0101 | J1 |
| 1 | NTCG103JX103DT1S | Resistor_SMD:R_0402_1005Metric | TH1 |
| 1 | NetTie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT1 |
| 1 | PackNTestPoint | Tested:test | TP8 |
| 1 | PackPTestPoint | Tested:test | TP9 |
| 1 | RX | Tested:test | TP4 |
| 1 | SCL | Connector_PinHeader_1.00mm:PinHeader_1x01_P1.00mm_Vertical | TP18 |
| 1 | SDA | Connector_PinHeader_1.00mm:PinHeader_1x01_P1.00mm_Vertical | TP17 |
| 1 | SSM6J507NU_LF | SSM6J507NU:TRANS_SSM6J507NU_LF | Q6 |
| 1 | STUSB4500QTR | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U2 |
| 1 | TX | Tested:test | TP3 |
| 1 | UDPI | Tested:test | TP2 |
| 1 | VSS | Connector_PinHeader_1.00mm:PinHeader_1x01_P1.00mm_Vertical | TP20 |
Questions
How big is the BMS PCB?
It measures 38 × 24 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BMS use?
82 parts, built around the ATTINY816-MN, BQ28Z610DRZR-R1, ESDA25P35-1U1M and MM3Z5V6C. 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 BMS KiCad files?
From the SMalasGit/2s-BMS repository on GitHub, at the commit this page was made from: the board is BMS.kicad_pcb and its schematic BMS.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BMS design in my own project?
Its repository states no licence, so its author keeps all rights: ask SMalasGit before reusing the design.
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