Quick Answer
To configure alarms for low battery voltage in a BMS, connect alarm contacts to the BMS's low voltage alarm output, set the alarm threshold to the desired voltage, and choose the notification method (e.g., email, SMS, or relay output).
BMS Alarm Configuration
When configuring alarms for low battery voltage, start by identifying the alarm contacts available on the BMS. Typically, these contacts are labeled as “HV” (high voltage), “LV” (low voltage), “OC” (overcharge), and “UC” (undercharge). Connect the alarm contacts to the desired output (e.g., relay, LED, or buzzer) to trigger the alarm when the voltage falls below the set threshold.
Setting the Low Voltage Alarm Threshold
Set the alarm threshold to the desired voltage, usually 10-20% below the battery’s nominal voltage. For example, if your lithium-ion battery has a nominal voltage of 12.6V, set the alarm threshold to 11.2V (12.6V - 1.4V). This threshold value can be adjusted based on your specific requirements and the BMS’s capabilities.
Notification Methods
Choose the notification method for the low voltage alarm, such as email, SMS, or relay output. If using a relay output, connect it to an external device (e.g., a siren or a monitoring system) to alert the user or trigger an automated response. Ensure that the chosen method is compatible with the BMS and the alarm output configuration.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.