Victron Energy Battery Balancer Manual

Victron Energy Ikke kategoriseret Battery Balancer

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www.victronenergy.com

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nbal

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ance

anceance

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, when new 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 (caused by undercharging) of the batteries with the lower initial state of charge and sulphation

charge.

ThThe S

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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 V, the Battery Balancer will turn on and compare the voltage ,3

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

LED indicatorsLED indicators

Gre

GreGreen:

en:

en:en:

on (battery voltage > 27,3V)

Orange

OrangeOrange:

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

Orange

OrangeOrange:

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

Red:

Red: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

Alarm relayAlarm relay

Normally open.

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

Alarm reset

Alarm resetAlarm reset

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

The

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

Even m

Even mEven more insigh

ore insigh

ore insighore insight and cont

t and cont

t and contt and control with th

rol with th

rol with throl with the midpo

e midpo

e midpoe midpoint

int

intint

moni

monimonitori

tori

toritoring func

ng func

ng funcng functio

tio

tiotion of the

n of the

n of then of the BMV

BMV

BMV BMV-

--70

70702 Battery M

2 Battery M

2 Battery M2 Battery Mo

ooni

ninitor

tor

tortor

The BMV

-702 measures the midpoint of a string of cells or batteries. It displays the s deviation from the ideal midpoint in volt 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.

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

Learn more

Learn moreLearn more a

a abou

bou

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t b

t bt batter

atter

atteratteries a

ies a

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ndnd batte

batte

batte battery c

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harghargin

ining

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 B attery Balancer

Battery Bal

Battery BalBattery Balancer con

ancer con

ancer conancer connected to

nected to

nected tonected to two

two

two two series

series

seriesseries

cconnecte

onnecte

onnecteonnected 1

d 1

d 1d 12

22V ba

V ba

V baV batteries

tteries

tteriestteries

(2(24V sy

4V sy

4V sy4V system

stem

stemstem)

)

))

Three Battery Bal

Three Battery BalThree Battery Balancers connected

ancers connected

ancers connectedancers connected to four series

to four series

to four series to four series

connec

connecconnected

ted

tedted 12

12 12V

VV batteri

batteri

batteri batteries

eses

(48

(48(48

V sy

V syV system)

stem)

stem)stem)

Victron Energy B.V. | De Paal 35 | 1351 JG Almere | The Netherlands

General phone: +31 (0)

36 535 97 00 | E-mail: sales@victronenergy.com

www.victron

www.victronwww.victronenergy.com

energy.com

energy.comenergy.com

Victron Battery Balancer

Input voltage range Up to 18V per battery, 36V total

Turn on level 27,3 1%V +/-

Turn off level 26,6V +/- 1%

Current draw when off 0,7 mA

Midpoint deviation to start balancing 50 mV

Maximum balancing current 0,7A (when deviation > 100 mV)

Alarm trigger level 200 mV

Alarm reset level 140 mV

Alarm relay A normally open 60V / 1

Alarm relay reset Two terminals to connect a push button

Over temperature protection yes

Operating temperature - o C 30 t +50°

Humidity (non-condensing) 95%

ENCLOSURE

Colour Blue (RAL 5012)

Connection terminals Screw terminals 6 mm² / AWG10

Protection category IP22

Weight 0,4 kg

Dimensions (h x w x d) 100 x 113 x 47 mm

STANDARDS

Safety , -1 EN 60950 CSA/UL 62368

Emission -6- -1 EN 61000 3, EN 55014

Immunity -6- -6- -2 EN 61000 2, EN 61000 1, EN 55014

Automotive Directive

EN 50498

Installation

-The Battery Balancer(s) must be installed on a well ventilated vertical

surface close to the batteries (but, due to possible corrosive gas ses,

not above the batteries!)

In case of series-parallel connection, the midpoint

interconnecting cables must be sized to at least carry the current

that arises when one battery becomes open- circuited.

- In case of 2 parallel strings: cross section 50% of the series

interconnecting cables.

- In case of 3 parallel strings: cross section 33% of the series

interconnecting cables, etc.

If required: first wire the alarm contact and the alarm reset.

Use at least 0,75 mm² to wire the negative, positive and midpoint

connections (in this order . Additionally, in your application ) if it is

needed to comply with UL, also fuse these wires near the batteries

with a 10A fuse suitable for DC (e.g. Littelfuse ATOF series current

automotive blade fuse in combination with an inline fuse holder).

The balancer is operational.

When the voltage over a string of two batteries is less than 26,6V the

balancer switches to standby and all LEDs will be off.

When the volt

age over a string of two batteries increases to more than

27,3V (during charging) the green LED will turn on, indicating that the

balancer is on.

When on, a voltage deviation of more than 50 mV will start the

balancing process at 100 mV e of the two orange LED and on s will turn

on. A deviation of more than 200 will trigger the alarm relay. mV

What to do in case of an alarm during charging

In case of a new battery bank the alarm is probably due to differences in

initial state

- -of charge. If the difference between the lowest and highest

battery

voltage reading is more than 0,9V: stop charging and charge the

individual batteries or cells separately first, or reduce charge current

substantially and allow the batteries to equalize over time.

If the problem persis

ts after several charge- discharge cycles:

-In case of series parallel connection disconnect the midpoint parallel

connection wiring and measure the individual midpoint vol

tages during

absorption charge to isolate batteries or cells which need addi tional

charging, or:

Charge and then test all batteries or cells individually or:

Connect two or more battery balancers in parallel (on average one

balancer will take care of up to three parallel 200 Ah strings).

In case of an older battery bank which

has performed well in the past, the

problem may be due to:

Systematic undercharge: more frequent charging needed (VRLA

batteries), or equalization charge needed (flooded deep cycle flat

plate or OPzS batteries). Better and regular charging will solve the

problem.

e) batteries One or more faulty cells: replace all .

Battery Balancer

Battery BalancerBattery Balancer c

c connected

onnected

onnectedonnected to six

to six

to six to six series

series

seriesseries-

--parallel

parallel

parallel parallel

connec

connecconnected

ted

tedted 1

1 12V b

2V b

2V b2V batter

atter

atteratteries

ies

iesies (24

(24

(24 (24V sys

V sys

V sysV system)

tem)

tem)tem)

Thre

ThreThree Batt

e Batt

e Batte Battery Bal

ery Bal

ery Balery Bala

aancer

ncer

ncerncers conn

s conn

s conns connected

ected

ectedected to

to to 12 seri

12 seri

12 seri12 series

eses-

--parallel

parallel

parallel parallel

connec

connecconnected

ted

tedted 1

1 12V b

2V b

2V b2V batter

atter

atteratteries

ies

iesies (48

(48

(48 (48V sys

V sys

V sysV system)

tem)

tem)tem)

Produkt Specifikationer

Mærke:	Victron Energy
Kategori:	Ikke kategoriseret
Model:	Battery Balancer

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