Pack Sniffer 2 / Controller 2

In Pack Sniffer mode, it is designed to be powered from USB 5V power pack (or an external 12V source), to read out the state of a battery pack and display user configurable info, (Individual cell voltages, temperature, current, state of charge / health, etc...).
This allows the user to check that the battery pack and all the cells are not damaged before purchase.

In Pack Controller mode, the battery pack output can be enabled, (pre-charger, high and low side contactors can be controlled, for up to 2 packs).
Status outputs can be configured to trigger based on warnings and / or errors, (pack / cell voltage, current, temperature).

For example to protect the battery: A low battery indication can be configured below a user defined voltage.
And the pack can be disabled, if the voltage on a single cell drops below a user defined voltage, to protect the cells from over discharge.

Different operating modes and configurations can be changed by editing the config file or loading new firmware via the micro SD card Flash Bootloader.

The Pack Sniffer 2 and accessories are available in the Store.

The key features of the Pack Sniffer 2:

Microchip dsPic33EP256MU806 microcontroller, running at 120 Mhz (60MIPs).

16 character x 2 line display.

Micro SD card (used for firmware updates and config file changes).

Micro USB port (used for power, but could be used to read/write to the micro SD card).

5V to 12V boost converter (5W max).

2 CAN bus channels.

3 12V Source bits (2A each, with fly back suppression diode).

7 GND Sink bits (2A each, with fly back suppression diode).

2 Analog inputs (0-16.384V full scale).

1 RS232 Serial port.

1 I2C port (internal).

The Pack Sniffer 2 is designed to run off 5V USB or an external 12V (7V-15V) supply.
The built in boost converter can draw up to 2A (current limited) at 5 volts and output up to 800mA at 12V.
Caution: If a 5V USB and an external 12V supply are both connected, loss of 12V supply will cause the boost converter to attempt to power the 12V rail, an external blocking diode is recommended (see wiring diagram below).

Cable sets can be purchased in the Store, or you can make your own.
These are the recommended wiring diagrams for the Pack Sniffer 2 connectors, 7x2 (14-pin) and 5x2 (10-pin), click the image for the .pdf file.

Pack Sniffer 2 Boot Loader:

The Pack Sniffer 2 boot loader requires Intel .hex files with the following naming convention:
WT_PS2_vX.Y.hex Where X is the major version and Y is the minor version.
The boot loader will write to main program flash the highest version found in this directory:
[SDcard]\WT_PS2\firmware

Available Firmware files:

WT_PS2_v0.1.hex # 7x2 Connector Hardware Test Program, (Tests all I/O, do not use when connected to a real battery pack).
WT_PS2_v0.2.hex # 5x2 Connector Hardware Test Program, (Tests all I/O, do not use when connected to a real battery pack).
WT_PS2_v0.5.hex # Pack Sniffer 1 Application, ported to Pack Sniffer 2 Hardware.
WT_PS2_v0.8.hex # Pack Sniffer 2 Application, Display: Volt, Current, Cell High, Cell Low, Temp, SOC, Health (Pre-charge, POS, NEG Contactor).
WT_PS2_v1.0.hex # Pack Sniffer 2 / Controller 2 Application, User Configurable via Config File.
WT_PS2_v1.1.hex # Pack Sniffer 2 / Controller 2 Application, Added support for dual battery packs.
WT_PS2_v1.2.hex # Pack Sniffer 2 / Controller 2 Application, Fixed (Cell Span, Average, High, Low) display not updating due to a timing glitch.