BCC is an expanding, independent communication unit designed exclusively for the GWL CPM, which expands the protection options and enables remote management of batteries protected by the CPM.
The key features
- It contains a 10 Mbps LAN interface for remote reading and writing of parameters to the CPM and two programmable potential-free switching NO/NC relays max 30V / 1A AC/DC.
- It's configurable and controllable using any web browser on tablets, phones, or notebooks.
One-time or periodic reading and writing of values to and from CPM via LAN interface and TCP/IP protocol (HTTP + XML), in particular:
- Emergency shutdown, switching on and resetting the entire CPM.
- Reading the voltage of all cells connected to the CPM and the total battery voltage.
- Reading the Umax and Umin output conditions on the CPM (closed/open).
- Displaying the last event on the CPM (voltage Umin, Umax, Uemergency),
- Remote closing/opening of output Terminals 1-4 Umax and Umin and Emergency on CPM,
- Remote change of Umax and Umin voltage limits protecting the battery against deep discharging or overcharging,
- 2 additional programmable switching NO/NC potential-free relays, automatic state change possible according to battery voltage, according to the highest difference between cells or in the case of communication failure. Manual switching via www is possible at any time,
- Wide range of supply voltage 9-65V, also using passive PoE.
Description of the main parts of the board
- RESET - to reset the BCC module to the factory default settings
- LAN CONNECTOR - periodic reading and writing of values to and from CPM via LAN interface
- POWER SUPPLY - 9 – 65V power supply via terminal block
- LED INDICATORS - the board is switched on, establishing communication with CPM, ethernet interface and the states of the two relays (C1 and C2). The lights are on when they are switched, the lights are off when they are in their normal state.
- RELAYS - Relays 1 and 2 can be set arbitrarily, see the user manual (they can react to Udiff, Ubatt, loss of communication ...).
- COM.i2c - logic connection to CPM, communication.
Basic connection of inputs and outputs
- COM.i2c – Communication bus between BCC and CPM module.
- START CPM – It‘s possible to remotely diagnose the battery
- RESET CPM – If necessary, switch on or reboot the CPM BMS module, i.e., reconnect the load and/or charger. It isn‘t necessary to switch off the CPM via relays and terminals.
BCC installation examples
Remote reboot or turning on the CPM board
Using the BCC unit, it's possible to remotely diagnose the battery and, if necessary, switch on or reboot the CPM BMS module, i.e., reconnect the load and/or charger.
Charger and load
Connecting a power relay/contactor with a control voltage of a 12V DC coil (same as the battery) to the NC terminals of Relay 2 and we use it to control the battery charger and load (appliance).
Local semaphore and voltage record at thingspeak.com
The thingspeak.com portal is suitable for the default-supported data structure. In addition, it can inform the user about the battery status by email based on the entered rules and logic.
More examples of possible connection you can find in the