Victron Energy Battery Balancer Handleiding

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The problem: the service life of an expensive battery bank can be substantially shortened due to state of charge unbalance

One batte

ry with a slightly higher internal leakage current in a 24V or 48V bank of several series/parallel connected batteries will cause

under

charge of that battery and parallel connected batteries, and overcharge of the series connected batteries. Moreover, whennew cells

or batteries are connected in series, they should all have the same initial state of

charge. Small differences will be ironed out during

absorption or equalize charging, but large differences will result in damage due to excessive gassing (cause

d by overcharging) of the

batteries with the

higher initial state of charge and sulphation(caused by undercharging) of the batteries with the lower initial state of

charge.

The Solution: battery balancing

The Battery Balancer equalizes the state of cha

rge of two series connected 12V batteries, or of several parallel strings of series connected

batteries.

When the charge voltage of a 24

V battery system increases to more than 27,3V, the Battery Balancer will turn on and compare the voltage

over the two seri

es connected batteries. The Battery Balancer will draw a current of up to 0,7A from the battery (or parallel connected

batteries) with the highest voltage. The resulting charge current differential will ensure that all batteries will converge t

o the same state of

charge.

If needed, several balancers can be paralleled.

A 48

V battery bank can be balanced with three Battery Balancers.

LED indicators

Green:

on (battery voltage > 27,3V)

Orange:

lower battery leg active (deviation > 0,1V)

Orange:

upper battery leg active (deviation > 0,1V)

Red:

alarm (deviation > 0,2V). Remains on until the deviation has reduced to less than 0,14V, or until system voltage drops to less than

26,6V.

Alarm relay

Normally open.

The alarm relay closes when the red LED switches on and opens when the red LED switches off.

Alarm reset

Two terminals are available to connect a push button. Interconnecting the two terminals resets the relay.

The

reset condition willremain active until the alarm is over. Thereafter the relay will close again when a new alarm occurs.

Even more insight and control with the midpointmonitoring function of the BMV-702 Battery Monitor

The BMV

-702 measures the midpoint of a string of cells or batteries. It displays thedeviation from the ideal midpoint in volts or percent.

Separate deviation percentages

can be set to trigger a visual/audible alarm and to close a potential free relay contact for remote alarm

purposes.

P

lease see the manual of the BMV-702 for more information about battery balancing.

Learn more about batteries and battery charging

To learn more about batteries and charging batteries, please refer to our book

‘Energy Unlimited’(available free of charge from Victron

Energy and downloadable from

www.victronenergy.com).

Victron Battery Balancer

Battery Balancer connected to two series

connected 12V batteries(24V system)

Three Battery Balancers connected to four series

connected 12V batteries(48V system)

Product specificaties