WatchMon4

BMS central processor that watches the individual CMU cell monitoring units and provides supervision functions. The supervisor is able to notify a remote system(s) of the battery state and when required, trigger evasive action to prevent damage to battery pack.

More details and installation procedures here WatchMon4 FAQ. or Quick Start Guide

Software installation guide

Why do I need a starter kit not just the CellMons or WatchMon

The supervisor is not available individually by default except for those that have experience in ordering our products. Starter Kits ensure that you obtain all the necessary components to suit your application. If you have questions and are looking for the appropriate Starter Kit, please contact us, we can then assist you in making the right selection.

Refer to the FAQ on How to help us help you

Processor

ESP32 more powerful than WM 1
Data logging of key metrics for 10 years
Clock with backup battery
Optional over the air (OTA) upgrades to firmware
Upgrades firmware via USB
Secure web encryption to allow SSL link when connecting to optional cloud portal via MQTT.
Prevent all outputs from resetting when the processor firmware is updating (no transient on/off/on)

BMS Module Connectivity

Serial link to SoC% current sensor module
Serial link to isolated CellMon modules

Remote Communication

WiFi connectivity (normal, disabled, or read only)
Can-Bus communication port to remote systems
Modbus rs485 link allowing connectivity to inverters without canbus
Optional blue-tooth connectivity (future enhancement)

Built-in input and Output Control

Two (2) onboard FET outputs 4A with 8A inrush
- e.g. remote circuit breaker trip + fan
Two (2) onboard input
- e.g. circuit breaker trip sensor

Expansion Board Compatible

Only required when additional functionality is required
26 pin IDE ribbon connector
- 5 Digital inputs
- 2 Analogue inputs
- 1 Pulse counter input
- 8 Digital outputs (4 FET + 4 Relay)
- 2 Digital output PWM
- NeoPixel LED control

Power Input

Built-in 8v to 65v DC-DC supply
Handle automotive transients

Ease of Use

Pluggable screw terminals to simplify installation, allowing pre-made cables for both shunt and cellmons
Relocation of onboard temperature sensors away from heat sources to have better representation of ambient conditions
Finger guard cover clip slots, more coming soon
Intuitive screw terminal labelling to reduce need to check documentation

Dimensions

Length 107 mm x Width 55 mm

Software
WatchMon4 requires the Latest release of WatchMonToolkit