SECTION 4: BMS & MAINTENANCE
BMS LOW POWER MODE
The Hubble BMS will enter low power mode if the following conditions happen:
1. When over-discharge protection has occurred. (30S later).
2. When all cell-voltage is less than the Sleep voltage parameter setting to prevent complete
cell/ battery drain.
3. Standby time is more than 24 hours (without charge and discharge current, without balance,
without protection and fault).
BMS EMC SAFETY
ESD:
Complies with Level 4 of GB/T 17626.2-2006 (EN55024): 8KV at contact and 15KV at air. Normal
operation after test.
ELECTROMAGNETIC CONDUCTION:
Complies with Lever A of YD/T 983-1998 (EN55022)
ELECTROMAGNETIC RADIATION:
Complies with Lever A of YD/T 983-1998 (EN55022)
INRUSH:
Complies with GB/T 17626.5-2008 (EN6100-4-2).
DATA STORAGE
The Hubble BMS has a built-in alarm and event data storage memory. Alarms and events are
recorded as, occurrence time, fault categories, over/under cell voltage, pack voltage, charge/dis-
charge capacity,charge/discharge current, temperature, etc. This can be downloaded by a service
technician to help troubleshoot any issues or problems of the battery.
MAINTENANCE
The Hubble BMS will protect the battery and lifespan of your battery as best possible. However, it
must be noted that proper operation of the battery is recommended, and maintenance functions
should be taken to ensure the maximum life of your batteries.
Cell balancing is a very important function of the lifespan of your battery. It is
important to ensure the cell balancing functions are properly performed. The
Hubble BMS cell balancer will only activate upon 100% state of charge when
the batteries near full charge. Thus, it is critical that a full charge to the batteries
are provided at least once every 5 (five) days, but preferably daily upon a charge
cycle. Enough charge time should be provided to balance the cells until the BMS
completely stops taking charge from the inverter. Cell cycle life cannot be guaran-
teed if balancing is not performed on a regular basis. This is especially important
in complete off grid systems where a stable power supply is not available.
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