BMV 702 battery status monitor

BMV trackers are new high-precision battery monitoring systems.

Why monitor battery operating conditions? To make it last longer! Detailed battery monitoring allows us to detect any operational deficiencies with quick remediation to support long battery life.

Suitable for all types of lead-acid batteries including AGM and gel batteries. Easy adjustment of battery capacity (factory setting to 200 Ah). Autodetection of 12, 24, 36, 48, 60, 120, 144 and 288 V. Regular automatic calibration of the instrument for reliable measurement readings (can also be done manually). The BMV 700H version is designed for systems with high operating voltages (70 - 350 V DC), bMV702 version is designed to monitor two batteries or monitor battery temperature or xxx. The tracker is also suitable for Li-on batteries.
  Basic displayed values:
- current voltage (V) of the battery
- current current (A) going into (positive values - charging) or out (negative values - discharging) of the battery

- the current power (W) going into (positive values - charging) or out (negative values - discharging) of the battery (multiplied by the voltage and current)
- total amount of energy drawn from the battery to power appliances in ampere hours (Ah)

- current battery charge percentage
- estimated (sophisticatedly calculated) time in hours to 50% battery discharge for a given power consumption

 

Technical parameters:
supply voltage 6.5 - 95 V DC

  - power consumption with unlit display and relay off:  4 mA (12 V) and 3 mA (24 V)

  - power consumption with unlit display and relay on:  15 mA (12 V) and 8 mA (24 V)

working voltage: 12, 24 and 48 V (self-detection)

-Maximum current through the shunt: -500 to +500 A (discharging and charging the battery)

-Maximum deviation in voltage reading ±0.01 A at 0 - 100 V
-Maximum deviation in current reading ±0.01 A with 500 A shunt

-Maximum deviation in capacity reading ±0.1 Ah for battery capacities 0 - 100 Ah

-Maximum capacity reading deviation ±1 Ah for battery capacities 100 - 9999 Ah

-Maximum deviation in charge reading ±0.1%

  - maximum deviation in the estimation of the remaining time ±1 hour (in the range of 1-240 hours)

-Maximum deviation in power reading ±1 W in the range from - 100 W to 1 kW

  - for total battery capacity 20 - 9999 Ah
  - Operating temperature range -20 to + 50 °C
  - circular diameter of the actual tracker: 63 mm

  - square size of the custom tracker cover: 69 x 69 mm

  - Depth of custom tracker: 31 mm

  - switched relay: 60V/1 A maximum

- weight of the tracker: 70 g

- weight of the sidewall: 315 g
  - sidewall connection screws: M10

  - material: plastic

The tracker stores selected historical data and the threshold values reached:
- deepest battery discharge achieved
- the rate of last battery discharge
- number of discharging/charging cycles of the battery
- average battery discharge value
- number of full battery discharges
- maximum achieved battery voltage
- minimum achieved battery voltage
- number of days since the last full battery charge
 
The BMV-700 tracker delivery includes:
- custom tracker with backlit digital display and controls
- plastic tracker cap with dimensions 69 x 69 mm
- 500A/50mV shunt designed for a maximum current of 500 A (to be installed on the negative battery cable)

The tracker performs sophisticated monitoring of the supplied and drawn energy, together with taking into account the adjustable Peukert exponent (the greater the energy draw, the relatively lower the amount of available energy in the battery and vice versa) and the battery efficiency to estimate the actual amount of energy (Ah) and the battery charge rate (in percentage). In order to correctly display the amount of available energy in the battery, it is necessary that all energy entering and leaving the battery pass through the shunt.

The tracker itself can be integrated into the wall without the need for rear access (covered screws).

For currents greater than 500 A, a replacement shunt designed for currents of 1000 and 2000 A can be supplied. Shunts up to a maximum current of 9 999 A with a voltage range of 1 - 100 mV (both adjustable) can be used on the tracker.

The monitor has a switched relay. This is activated/deactivated based on the measured battery level. It is factory set to turn on when the battery charge level drops below 50% and turn off when the battery reaches 90% charge. These values can be changed in the settings. Also, the switching logic can be reversed, or the relay is on by default, off by default. The relay can be used for switching on/off devices such as external alarm, power station etc.