Lynx Smart BMS 8. Paralleling Lynx BMSes 8.1. Introduction A parallel redundant battery bank can be created by combining multiple Lynx Smart BMS and Lynx BMS NG units with their associated battery banks. This innovative feature significantly enhances lithium battery systems by multiplying the maximum energy storage capacity and supporting higher currents. More importantly, it introduces redundancy, ensuring that the system remains operational even if one battery bank fails. This redundancy is crucial for maintaining a continuous power supply and operation. Key features Increased capacity and redundancy:
By paralleling battery banks, the system can handle higher currents and remain operational even if one battery bank fails. Extended compatibility: In these configurations, Lynx Smart BMS units can be mixed with Lynx BMS NG units, allowing for systems that combine battery banks with Lithium Smart and Lithium NG batteries. However, only Lynx Smart BMS units with the same current rating may be used in parallel (e.g., 500A + 500A or 1000A + 1000A, but not 500A + 1000A). Automatic error handling: If a battery bank encounters an error, it will disconnect while the remaining battery banks continue to operate. This ensures a continuous power supply and reduces the risk of system shutdown.
Enhanced monitoring: The system provides a detailed view of all connected and disconnected battery banks in the GX device list, enabling comprehensive monitoring and diagnostics. Seamless reconnection: When a disconnected BMS is ready to connect, it will safely reconnect the battery bank without causing significant current surges. Automatic integration of new battery banks: No configuration required. How does it work? If the GX device sees multiple battery banks with the same VE.Can instance, the GX treats them as BMSes all connected to the same DC bus.
When two or more BMSes are connected, they form a "virtual" battery system that appears as an additional single device in the GX device list. The virtual battery system acts as a standard battery bank with all its functions, just like a physical battery bank. DVCC will automatically select that battery bank. When connecting a BMS to an already running system, the acceptable voltage difference before closing the contactor depends on the capacity of the battery banks already online; the higher the capacity, the smaller the permissible voltage difference. Only when the difference is within acceptable limits will the new battery bank be connected.
ATC & Alternator* ATC contact status are synchronised. The synchronisation of the ATC signal stops when one of the BMSes opens its main contactor which allows the rest of the system to continue operation and charging. When the disconnected set joins the connected set again, the synchronisation of ATC is restored again. *For new system design: the Alternator can now be connected directly to the ATC contact as the main contactor inside the Lynx BMS always adheres a 2 second delay after triggering the ATC contact to allow alternators to power down before opening the main contactor.
If a low cell voltage event arises in one of the battery banks, the associated BMS will open it's contactor to allow the rest of the system to continue operation. 8.2. Requirements and limitations This section lists the requirements and limitations of running a battery system with multiple Lynx Smart BMSes. Requirements: Each Lynx Smart BMS in the system requires at least firmware v1.11. A GX device with firmware 3.40 or later. Limitations: Only Lynx Smart BMS units with the same current rating may be used in parallel (e.g., 500A + 500A or 1000A + 1000A, but not 500A + 1000A). Lynx Smart BMS units can be mixed with Lynx BMS NG units. Page 26 Paralleling Lynx BMSes