Frequency Asked Questions

WHAT IS BATTERY MONITORING SYSTEM?

The battery monitoring system is a system that guarantees the energy stored in the product’s battery is used efficiently. It works efficiently by avoiding costly downtime caused by unexpected battery failures.
To maintain consistency among batteries and extend their shelf life, the battery monitoring system can successfully avoid over-charging or under-charging them. The batteries can be left unattended at data gathering sites, or they can be used with their incorporated alert capabilities to help the user start the charge/discharge cycles. Functions involving the measurement of the battery voltage, charge status, or load activity are monitored. Based on these measured parameters, control functions act on the battery’s charging and discharging processes.

battery voltage monitor

WHAT PARAMETERS CAN BE MONITORED ?

DFUN TECH battery monitoring system provides an opportunity of monitoring battery voltage, current, and anything necessary to make sure the health of the batteries. The followings are the parameters that can be monitored.

▸ Cell voltage

▸ Cell impedance

▸ Cell temperature

▸ String voltage

▸ String current

▸ String SOC & SOH

WHAT KIND OF BATTERY CAN BE MEASURED ?

2V/6V/12V Lead acid & lead carbon & multi-loop batteries, or 1.2V Ni-Cd batteries.

WHAT KIND OF APPLICATION FOR YOUR SOLUTIONS ?

1. PBAT-GATE solution: For small data center application, one PBAT-Gate suit  for one UPS, 4 strings of battery, each string ≤120pcs batteries, totally 480pcs batteries, PBAT-Gate with built-in webpage, support remote monitoring(you can find more details from our online demo system)

2. PBMS2000 solution: For Telecommunication BTS (Base Station)

3. PBMS6000 solution: For large scale data center application, one PBMS6000 main module support monitoring 6 battery strings, up to 420pcs battery cells

4. PBMS7000 solution: For Solar Energy Storage

5. PBMS6000 Pro: For both lead-acid & Ni-cad battery monitoring, and with the electrolyte liquid level monitoring function

WHAT IS BATTERY BALANCE?

Balancing function can make the individual cell voltage battery tend to be the same, at the same time, it can avoid battery overcharging, and improve the capacity and active life of batteries.The function of battery balance can make the individual cell voltage battery tend to be the same. At the same time, it can avoid battery overcharging and improve the capacity as well as the active life of batteries.

WHY MEASURE INTERNAL RESISTANCE ONLY IN A FLOATING STATE ?

As a comparison, when the battery is in full charge state, UPS will not stop charging, but will still provide a constant floating charge voltage and a very small floating charge current to the battery instead. Batteries go to a floating state, SOC is always 100% at that time, the battery is relatively stable, and the internal resistance is the closest to its true value.

WHAT IS SOC, SOH ?

SOC: State of charge, it is the percentage of remaining capacity after it has been used for a period of time or it has been shelved for a long time and full capacity of completely charged.SOC: State of charge, it is the percentage of remaining capacity after it has been used for a period of time, or it has been shelved for a long time and full capacity of completely charged.

SOH: State of health, that is the health of the battery, which could be defined as the percentage of current capacity and out-of-factory. Normally, batteries with less than 80% SOH could no longer be used.

WHY MEASURE THE TEMPERATURE FROM THE NEGATIVE ELECTRODE?

Temperature on negative electrode would be significantly increased when batteries are charging or discharging according to the fact of electro-chemical reaction, it is widely accepted that temperature measurement of the negative electrode would more accurately reflect the internal temperature of the battery.

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