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Fuel gauge-BQ27441-breakout hardware design

SolderedElectronics·Fuel-gauge-BQ27441-breakout-hardware-design·CAD/V1.0.0/Fuel_gauge_BQ27441.kicad_pcb

Fuel gauge-BQ27441-breakout hardware design layout, top view — open source board by SolderedElectronics
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About the Fuel gauge-BQ27441-breakout hardware design

Fuel gauge-BQ27441-breakout hardware design is an open source PCB design by SolderedElectronics, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 38 × 22 mm, with 27 components from 17 distinct parts.

Other key parts include the BQ27441, NMOS-DUAL and SE5218. By type, the board carries 8 resistors, 6 relays, 4 jumpers, 4 capacitors and 3 ICs.

It belongs with the power & battery and dev boards & breakouts designs in this gallery.

From the project

Hardware design, BOM, gerbers and 3D files for Fuel-gauge-BQ27441-breakout designed by Soldered Electronics.

Fuel gauge is a special type of accessory for lithium batteries that very precisely measures the state of the battery. This includes current voltage [mV], state of charge [%] and probably most interestingly: remaining capacity in the battery [mAh]. It is used with 1S batteries, and provides all this information via the I2C interface.

On our board you can find easyC connectors which allow I2C communication with microcontroller. Also, there is a JST input for any pouch battery you can find in our offer, as well as quick connect terminal connector for input if your source doesn’t have JST…

Fuel gauge-BQ27441-breakout hardware design, from the project README
From the project README

Main components on the Fuel gauge-BQ27441-breakout hardware design

BQ27441NMOS-DUALSE5218

Fuel gauge-BQ27441-breakout hardware design bill of materials (BOM)

27 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BQ27441
U1
1
NMOS-DUAL
U2
1
SE5218
U3
2
HOLE_3.2mm
H1, H2
2
SMD_JUMPER_3_PAD_TRACE
JP1, JP2
1
SMD-JUMPER-CONNECTED_TRACE_SLODERMASK
JP3
1
SMD_JUMPER
JP4
1
HEADER_MALE_1X1
K1
1
JST-2pin-SMD
K2
1
TERMINAL_KF235-5.0-2P
K3
2
easyC-SMD
K4, K5
1
HEADER_MALE_4X1
K6
2
1u
C1, C2
2
2.2uF
C3, C4
6
10k
R1, R2, R3, R4, R5, R8
1
0.010R
R6
1
1.8M
R7

Fuel gauge-BQ27441-breakout hardware design design files

The KiCad project lives in the SolderedElectronics/Fuel-gauge-BQ27441-breakout-hardware-design repository on GitHub; these links point at the commit this page was built from.

Fuel gauge-BQ27441-breakout hardware design: common questions

How big is the Fuel gauge-BQ27441-breakout hardware design?

The Fuel gauge-BQ27441-breakout hardware design measures 38 × 22 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fuel gauge-BQ27441-breakout hardware design?

27 components, from 17 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 Fuel gauge-BQ27441-breakout hardware design design files?

From the SolderedElectronics/Fuel-gauge-BQ27441-breakout-hardware-design 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 Fuel gauge-BQ27441-breakout hardware design design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which SolderedElectronics chose for the repository.

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