The electronics that protect a lithium battery — cutting charge or load on over/under-voltage, over-current or temperature limits. Managed batteries require one.
A BMS is the lithium battery’s built-in guardian — cutting charge or load on over-voltage, over-current or temperature limits before a cell is damaged. Managed lithium requires one.
It lives in (or alongside) the battery and interacts with your charging strategy; an externally-managed bank uses the BMS to control contactors and chargers.
Design your van, boat, cabin or RV system in Wattonomy and it accounts for whether your bank is internally or externally managed and reflects it in the design and fusing notes — from the appliances you actually run, sized to the recognized standard for your region. You see it on the wiring diagram, in the sized parts list, and in a plain-English build pack that explains the reasoning behind every choice. No account, no email — about a minute to a complete, validated design.
It protects the lithium cells by disconnecting charge or load when voltage, current or temperature go out of safe limits, and balances the cells.
Drop-in batteries have one built in. Building a bank from raw cells, or running large managed banks, calls for an external BMS controlling contactors and chargers.
It takes about a minute. No account, no email.