HardLabs

EvBMS

Greg-Fordyce·evBMS·6802Slave/6802-2slv.kicad_pcb

EvBMS PCB layout, top view — open source PIC board by Greg-Fordyce

About the EvBMS PCB

EvBMS is an open source PIC PCB design by Greg-Fordyce, published on GitHub. It is a 2-layer board measuring 58.8 × 36.5 mm, with 68 components from 25 distinct parts.

Its main chip is the PIC16F1825, from the PIC family. Other key parts include the LTC6802-2, TCLT1009, ACPL-W61L, ACPL-K64L and MAX232. By type, the board carries 30 resistors, 25 capacitors, 6 ICs, 5 connectors and 2 diodes.

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

From the project

Electric Vehicle Battery Management System

An open source battery management system for electric vehicles using lithium cells.

We make no claims about safety/effectiveness/reliability of this system. It's just one of the many possible solutions now available for the management of EV batteries, and the standard disclaimer below applies.

This BMS carries no warranty or guarantee of any kind! It's used at your own risk, and I make no claims as to suitability for a particular function. Prospective users must evaluate the system before using it, and no liability will be entertained by anyone in any shape or form whatsoever. The modules…

Main components on the EvBMS

LTC6802-2TCLT1009ACPL-W61LACPL-K64LPIC16F1825MAX232

EvBMS bill of materials (BOM)

68 components, 25 distinct parts.

QtyPartRefs
1
LTC6802-2
U1
1
TCLT1009
U2
1
ACPL-W61L
U3
1
ACPL-K64L
U4
1
PIC16F1825
U5
1
MAX232
U6
1
DB15
J1
1
USB B conn.
J2
1
USB A connector
J3
1
ICSP
J4
1
CONN_1
P1
1
BI_LED
D1
1
1N4148
D2
16
100nf
C1, C2, C3, C4, C5, C6, C7, C8 +8
9
1uf
C14, C15, C16, C18, C21, C22, C23, C24 +1
12
100R
R1, R2, R3, R4, R5, R6, R7, R8 +4
1
20R
R13
2
200K
R14, R15
1
4K7
R16
1
1K
R17
Show 5 more
QtyPartRefs
1
680R
R18
4
845R
R19, R20, R22, R23
5
330R
R21, R25, R26, R27, R28
1
10K
R24
2
200K
R29, R30

EvBMS design files

The KiCad project lives in the Greg-Fordyce/evBMS repository on GitHub; these links point at the commit this page was built from.

EvBMS: common questions

What microcontroller does the EvBMS use?

The EvBMS is built around the PIC16F1825, from the PIC family.

How big is the EvBMS PCB?

The EvBMS measures 58.8 × 36.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the EvBMS?

68 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the EvBMS design files?

From the Greg-Fordyce/evBMS repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the EvBMS design in my own project?

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

Can I test firmware for the EvBMS without the hardware?

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

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