IEI Integration PM-P006UPS - Manual (Page 15)

PM-P006UPS DC/DC Converter Module
Page 7
communication channel)
The Host System (SMBus Host) requests information from the battery and then uses it to
provide the user information about the battery present state and capabilities. The Host
System (SMBus Host) also receives critical events from the Smart Battery when it detects
a problem. Using the utility software, the battery state and capabilities can be shown in the
Host System through RS-232.
2.2 Safety
Both the battery and the PM-P006UPS must agree it is safe enough to begin charging. If
the battery detects some error conditions, the charging never begins. The error conditions
might include:
battery pack voltage too high or low,
temperature out of acceptable ranges,
individual cell voltage shorted.
Furthermore, to continue charging, both the battery and the PM-P006UPS must be
satisfied it is still safe to do so. The battery sends a message or stop sending messages to
the PM-P006UPS to terminate charge if any error condition occurs in the battery. Second,
the PM-P006UPS monitors the battery pack Safety Signal terminal. If the Safety Signal
moves out of a range that allows charging, the PM-P006UPS immediately terminates
charge. This could happen if the temperature of the battery pack got too hot.
These mechanisms are independent of and in addition to any protection mechanisms in
the battery pack itself, for example, fuses or protection FETs controlled by hard-wired
safety circuitry.