230A 24V-48V Cyrix-Li Battery Combiner - Victron Energy

Description

LiFePO4 battery: it prevents undervoltage, overvoltage and overheating of the cells
The first line of protection is cell balancing. All Victron LiFePO4 batteries have cell balancing built-in.
The second line of protection consists of:

• turning off the load in case of imminent undervoltage on the cells, and
• stopping and reducing the charging current in case of imminent overvoltage on the cells, high (>50°C) or low (<0°C) temperature.

The VE.Bus BMS is the heart of the second line of protection.
However, not all loads and chargers can be controlled directly by the VE.Bus BMS
In order to turn off these loads or chargers, several Cyrix switches controllable by the VE.bus BMS are available

Cyrix-Li-Charge

The Cyrix-Li-Charge will connect a battery charger with a 3-second delay:

• if the load disconnect output of the VE.Bus BMS is high, and
• if it measures 13.7 V (27.4 V or 54.8 V resp.) or more on its battery charger connection terminal, and
• if it measures 2 V or more on its battery terminals (the Cyrix will remain open if not connected to the battery).

The Cyrix-Li-Charge will immediately deactivate if its control input becomes floating, indicating overvoltage or overheating of the cells.
In general, a cell overvoltage alarm will reset shortly after the charging process stops. The Cyrix will then reconnect the charger after a 3-second delay. After 2 attempts to reactivate with a 3-second delay, the delay will increase to 10 minutes.
If the battery voltage is below 13.5 V (27 V or 54 V resp.), the Cyrix will deactivate with a one-hour delay.
Note 1: In case of zero discharge current, or reduced discharge current, the Cyrix will not deactivate immediately after the charger stops and/or disconnects because the battery voltage will remain above 13.5 V.
Note 2: If, after the Cyrix has deactivated, the battery charger output immediately rises to 13.7 V or more, the Cyrix will reactivate with a three-second delay.

LED status indication

• LED on: active = relay closed
• LED off, flashing every 10 s: inactive = relay open
• LED flashing every 2s: relay open; will close