Battery Backup Unit (BBU)
BBUs are usually used in conjunction with PSUs (Power Supply Units). Compared to traditional UPSs (Uninterruptible Power Supplies), BBUs are more compact, more efficient, and
ronments. The BBU is both a battery pack and a power module that includes 1.1kW discharge capacity and a constant-current charger for its atteries. The BBU can supply 12V full-power backup for over 10 minutes during an AC power loss or power fault
The pressure to meet this demand is most apparent in the design of Battery Backup Units (BBUs) and Power Supply Units (PSUs), where connectors must support high currents, dense packaging, hot-swap functionality, and low resistance, all while maintaining mechanical robustness and signal integrity.
BBUs are stacked up to provide backup power to the UPS. These are monitored by the Power Monitoring Interface (PMI), which is connected to a power shelf comprising Power Supply Units (PSUs).
Unlike conventional UPS systems, a PSU plus BBU features a compact design, reduced energy loss, and quicker switchover times. The enerXBar series combines a switched-mode power supply with a built-in BBU, eliminating the need for external UPS systems and enhancing energy efficiency.
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