120A 12V-24V Cyrix-Li Charge 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 incorporate cell balancing.
The second line of protection consists of:

• shutting down 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 or chargers can be controlled directly by the VE.Bus BMS.
In order to shut down these loads or chargers, several Cyrix switches controllable by the VE.bus BMS are available Cyrix-Li-load

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 13.7V (27.4V or 54.8V resp.) or more on its battery charger connection terminal, and
• if it measures 2V 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 on the cells.
In general, a cell overvoltage alarm will reset shortly after the charging process has stopped. 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 13.5V (27V or 54V resp.), the Cyrix will deactivate with a one-hour delay.
Note 1: In case of zero or reduced discharge current, the Cyrix will not deactivate immediately after stopping
and/or disconnecting the charger as the battery voltage will remain above 13.5V.
Note 2: If, after the Cyrix has deactivated, the battery charger output immediately increases to 13.7V or more, the Cyrix will reactivate with a three-second delay.

A built-in transient voltage suppressor will limit voltage spikes that may occur when the Cyrix suddenly deactivates due to overvoltage or overheating on the cells.