VRLA, Precautions

PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES
Precautions for handling Valve-Regulated
Lead-Acid Batteries
• This document should be read in its entirety
and its contents fully understood before
handling or using Panasonic rechargeable
Valve-Regulated Lead-Acid batteries. If there
are any questions, please contact Panasonic.
Please keep this document available for
reference. Due to the potential energy stored
in the batteries, improper handling or use of
the batteries by not observing the precautions
listed in this document may result in bodily
injury caused by electrolyte leakage, heat
generation, or explosion.
* All descriptions are subject to modification without notice.
Degree of danger
1. DANGER
Indicates an imminently hazardous situation
which, if not avoided, will result in death or serious
injury.
2. WARNING
Indicates a potentially hazardous situation which, if
not avoided, could result in death or injury.
4. RECOMMENDATION
Recommended course of action to prevent a situation
that could result in damage of quality, performance or
reliability of the batteries, should they be mishandled.
(Remark 1) Even in cases where lead-acid batteries
are handled improperly, a situation that
will result in the immediate death of the
user is highly unlikely. However, we have
assumed the higher DANGER level
situation instead of the WARNING and
CAUTION levels because the high
energy stored in batteries still implies a
possibility of extreme hazard which
might lead to serious injury.
(Remark 2) Serious injury here would include injury,
loss of eyesight, burns, electric shocks,
bone fractures and poisoning that will
cause permanent damage or require
hospitalization or intensive treatment
over an extended period. Minor injury
includes slight burns and electric shock.
Property damage means damage to
buildings and household effects including livestock and pets.
(Remark 3) RECOMMENDATION refers to the
suggested means by which to protect
batteries from impaired quality, performance and reliability.
3. CAUTION
Indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate
injury, or damage to equipment.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
Safety Precautions
1. Environment and condition of use
DANGER
CAUTION
(1) Do not load valve-regulated lead-acid batteries
(hereinafter described as “the battery”) in airtight
equipment. Use of the battery in airtight equipment
may cause explosion of the equipment or injury.
(1) The operating temperature range for the battery is
specified below. Use of the battery at
temperatures beyond this range may cause
battery damage.
Normal operating temperature of the battery is
77°F (25°C).
When discharged (equipment in use): 5°F to
122°F (-15°C to 50°C)
When charged: 32°F to 104°F (0°C to 40°C)
During storage: 5°F to 104°F (-15°C to 40°C)
WARNING
(1) Charge the battery using a specified charger or
under the charging condition specified by
Panasonic. Charging the battery under any other
conditions may cause the battery to overheat,
emit hydrogen gas, leak, ignite, or burst.
(2) When using the battery in medical equipment*,
provide a back-up system other than the main
battery. Failure of the main battery in the absence
of a back-up power could lead to injury.
(3) Avoid direct contact of the battery with metallic
containers; acid- and heat-resistant insulators
should be employed. Leakage of the battery in the
absence of insulators may cause problems such
as release of fumes and ignition.
(4) Do not place the battery near a device that may
cause sparks (such as a switch or a fuse). The
battery may generate flammable gas when
charged, so remember to keep the battery away
from fire oran open flame to prevent any sparks
from igniting or causing explosions.
(2) Do not allow the battery to be immersed in or
wetted with water/sea-water; as it may corrode
the battery, ignite or create an electric shock
hazard.
(3) Do not place or store the battery in an automobile
in hot weather, under direct sunlight, in front of a
stove, or near fire. Use or storage of the battery in
these places may cause battery leakage, fire or
bursting.
(4) Use of the battery in a dusty environment is not
recommended, as it may cause the battery to
short. The battery should be periodically checked
when used in such an environment.
(5) Avoid placing the battery near a heat-generating
part (such as a transformer). Using the battery
near a heat source may cause the battery to
overheat, leak, ignite, or burst.
* The battery should only be used in non life critical medical equipment.
When any medical equipment incorporating a Panasonic VRLA battery
is planned, please notify Panasonic.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
(6) In applications which use more than one battery,
first make sure of correct mutual connections
between batteries, and then connect the battery
with the charger or the load. Make sure to firmly
connect the (+) pole of the batteries to the (+)
terminal of the charger or load, and the (-) pole to
the (-) terminal in the same way. If the poles/
terminals of the batteries, the charger and the
load are connected improperly, explosion, ignition
or damage to the batteries and/or equipment
may occur, causing injury to personnel in some
cases.
(7) Be extremely careful not to drop the battery onto
feet to avoid the possibility of serious injury.
RECOMMENDATION
(1) Avoid sudden movements or applying shocks to
the battery e.g. from dropping the battery.
Damage and deterioration of battery characteristics may occur if the battery is dropped.
(2) Carefully check the life characteristics of the
battery when in actual loaded mode. Life of the
battery may vary greatly depending on charge/
discharge conditions
2. Installation
DANGER
CAUTION
(1) Insulate metallic tools such as torque-wrenches
and wrenches with a vinyl tape, etc. Using
uninsulated tools may cause a short circuit, and
the heat or sparks generated by the short circuit
could result in burns, damage to the battery, or
ignite an explosion.
(1) When unpacking the battery, make sure to
handle it gently. Rough handling may shock the
battery, causing damage. Check that the battery
is free from cracks, fractures, tipping and
leakage.
(Upside-down position)
(2) Take safety measures such as wearing rubber
gloves for insulation when handling a voltage of
45 V or higher. Operation without safety
measures may result in electric shocks to the
operator.
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(3) Avoid placing the battery in an environment which
is susceptible to floods. There is the possibility
that if the battery is immersed in water, it may
ignite or cause electric shocks to personnel.
so
(1) Do not contact any plastic or resin containing a
migrating plasticizer* with the batteries. Avoid
using organic solvents such as thinner, gasoline,
lamp oil, benzine and liquid detergent to clean the
batteries. The use of any of the above materials
may cause the containers and/or the covers
(ABS resin) of the batteries to crack and leak, or
could ignite. Avoid using material containing a
migrating plasticizer by asking the manufacturer
its contents.
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WARNING
(Upright position)
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(2) Do not place the battery in a closed room or near
fire. Placing the battery in such a location could
result in an explosion or fire due to hydrogen gas
emitted by the battery.
(2) When loading the battery in equipment, mount it
in the lower most section of the equipment in
order to ensure easy checking, maintenance
and replacement. Do not charge the battery in
the inverted (upside-down) position:
overcharging in the inverted position may cause
battery leakage from the safety valve. The
inverted position is demonstrated in the far left
picture below where the letters “Panasonic” on
the battery in the picture are inverted. The
following illustrations are for explaining positions
of the battery, not for showing accurate
configurations for each type of battery.
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* Examples of plastic or resin to avoid: Vinyl chloride, Oily rubber.
Examples of acceptable types of plastic or resin: Polyolefin resin such
as polypropylene or polyethylene.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
(Horizontal position)
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Panasonic
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(Vertical position)
(9) Apply insulation covers to terminals, joint parts,
bolts and nuts of the battery in order to prevent
electric shocks to personnel.
(10) When intending to use the battery in vibrating
equipment such as motor cycles, engine driven
bicycles and engine driven grass shears, please
consult Panasonic in advance.
(11) Fasten the batteries firmly to the equipment to
avoid the influence of vibration and/or physical
shock.
RECOMMENDATION
(3) Do not carry the battery by hanging it from the
terminal or the lead wire, as it may cause damage
to the battery.
(4) When carrying the battery, exercise caution not to
apply a strong shock to it by dropping it, jarring it
or causing it to collide with other objects, as this
may cause damage to the battery.
(5) Do not underestimate the weight of the battery. As
it is heavy for its volume, careless handling of the
battery may cause backache or other injuries to
the operator.
(6) Do not bring covered wires containing plasticizer
or non- rigid PVC sheets in contact with the
battery. Do not apply organic solvents such as
paint thinner, gasoline, kerosene and benzene or
liquid detergents to the battery. When brought in
contact with these materials, the battery case
may crack, causing leakage of the battery.
(7) Do not cover the battery with a material which
generates static electricity, such as a PVC sheet.
A static charge may trigger fire or explosion
(8) In fastening bolts and nuts of the battery, observe
the torque values specified: otherwise, sparks
may be generated and damage of the terminal
may occur. The fastening torque of bolts and nuts
is as follows:
Bolt (nut) size (mm)
(1) The battery and/or equipment should be installed
by skilled personnel (specialists) such as personnel
qualified for maintaining battery equipment. Handling
of the battery by unskilled personnel may lead to
dangerous errors.
Fastening Torque
Diameter
Pitch
Length
Nm
kg. cm.
lb. In.
M5
1.197(5)
0.031
(0.8)
0.591 ± 0.039
(15 ± 1)
2.0 ~ 2.9
20 ~ 30
17.3 ~ 26.0
M6
0.236(6)
0.039
(1.0)
0.7870.039
(20 ± 1)
3.9 ~ 5.4
40 ~ 55
34.6 ~ 47.6
M8
0.315(8)
0.049
(1.25)
0.7870.039
(20 ± 1)
7.8 ~ 9.8
80 ~ 100
69.3 ~ 86.6
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
3. Preparation Prior to Operation
REQUEST
DANGER
(1) Since the batteries tend to lose a part of their
capacity due to self-discharge during shipment
and storage, recharge the batteries before you
use them after purchase or long-term storage in
order to restore their full capacity. Check for the
following conditions before recharging:
(1) Be sure to provide enough insulation around the
lead wires and/or plates used between the
batteries and the application. Insufficient
insulation may cause an electric shock, heat
generating from a short circuit(or excess current)
may result in an injury, burn, smoke or ignition.
CAUTION
(1) Do not connect the battery directly to a power
outlet or a cigarette lighter socket of an automobile without using a charger. Direct connection to
power sources may cause battery leakage,
heating or bursting.
(2) Turn off the switch of the circuit when connecting
the battery to a charger or a load.
(3) If newly purchased batteries exhibit any irregularities in initial use, such as rusting, heating or
other problems, they should not be used. Continued use of an irregular battery may lead to
leakage, fire or bursting of the battery.
Charging method
Charging condition (at 25°C)
Constant voltage
• Regulation range of the controlled
voltage: 7.25V to 7.45V/6V battery,
14.5V to 14.9V/12V battery;
Initial current: 0.1CA to 0.4CA;
Maximum charging time: 24 hours.
• Short-time charge is possible
when several batteries of the same
model, under the same storage
conditions can be charged in
series. Otherwise they can be
charged separately.
• Charging current: 0.1CA
• Charging time (hours)=[Amount of
self-discharge (Ah)/0.1CA] x 120%
• Rough estimation of amount of
self-discharge is as follows (for an
example):
When the storage ambient
temperature is lower than 25°C,
and storage time is known, assume
the following amount of selfdischarge: [5%/month] x storage
months
• Multiply this by the rated capacity
(at 20 hour rate) of the battery
• Regardless of the above
calculation, the charge time for a
refresh charge must be less than 12
hours.
• When the storage ambient
temperature is higher than 25°C,
please consult Panasonic.
Constant current
4. Unspecified Use
CAUTION
(1) Do not place the batteries in an unspecified use
or they may leak, ignite, or explode.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
5. Method of use
DANGER
(1) The batteries must be charged using the
specified charger or by maintaining the charging
conditions indicated by Panasonic. If the
batteries are charged under conditions other
than those specified by Panasonic, they may
leak, ignite or explode.
(2) Do not connect the (+) and (-) terminals of the
battery to each other with a metallic material
such as wire; do not allow tools such as pipe
wrenches and wrenches to touch points of
different voltages on the battery; and do not
bring metallic necklaces or hair pins into contact
with the battery or store them together with the
battery. Failure to observe these precautions
may cause the battery to overheat, emit hydro
gen gas, leak, ignite, or burst.
WARNING
(1) Do not throw the battery in fire nor heat the
battery. The battery may burst or generate a
toxic gas if placed in contact with fire.
(2) Do not attempt to disassemble, remodel or
destroy the battery, as it may cause battery
leakage, fire or bursting, and could also create
sulfuric acid spills from the battery resulting in
possible burns to personnel and damage to the
immediate environment.
CAUTION
(1) Check the battery for any sign of irregularities in
appearance. If there is any damage to the
battery case/cover such as cracks, deformation
or leakage, replace the battery with a new one. If
the battery appears dirty or dusty, clean it. If a
battery of irregular appearance continues to be
used, decrease of capacity, leakage of
electricity, fumes, ignition or other problems
may result.
(2) If any irregularity is found in areas such as the
charge voltage and discharge characteristics of
the battery, replace it.
(3) For safety, make sure to observe the following:
Otherwise, leakage, ignition or an explosion of the
battery may occur.
1) Do not charge the battery with its (+) and (-)
terminals and the (+) and (-) terminals of the
charger connected in reverse.
2) Do not apply a solder directly to the battery
terminals. If direct soldering is unavoidable,
please contact Panasonic in advance.
3) Avoid mixed usage of batteries differing in type,
manufacturer or history of use.
4) Do not remove or damage the outer case of
the battery.
5) Do not apply strong shocks or jolts to the
battery.
(4) Do not continue to charge the battery beyond the
time specified in the instructions of use of the
charger. If the battery is not fully charged even after
being charged for a longer time than specified,
discontinue charging and remove the battery from
the charger. Charging for a longer time than
specified may cause the battery to leak, ignite or
burst.
(5) Do not discharge the batteries beyond the
maximum values indicated in the specifications. If
the batteries are discharged beyond the maximum
values, they may leak, ignite or explode.
(6) Children should only use the battery under the
guidance of an adult who should thoroughly
instruct the child on its use. During use the adult
should check that the battery is used exactly as
instructed.
Keep the battery beyond the reach of small children.
During charging or actual use of the battery, take
caution not to allow small children to remove the
battery from equipment.
PROPOSITION 65 WARNING
Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals known to
the State of California to cause cancer and
reproductive harm. Wash hands after handling.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
RECOMMENDATION
(1) The recommended cut-off voltage during
discharge depends on the size of the discharge
current. The relationship between the storage
battery discharge current and the ideal discharge
cut-off voltage is described in Panasonic
specifications and technical handbooks.
Do not continue discharging to the point where
the voltage drops below the recommended
discharge cut-off voltage.
If a storage battery that was discharged below
the recommended discharge cut-off voltage is
recharged, the storage battery may generate heat
which could deform it or cause condensation to
form on the battery casing due to the evaporation
of moisture from inside the battery. Discharging
below the recommended discharge cut-off
voltage may also accelerate the deterioration of
the battery’s performance characteristics.
(2) Avoid overdischarge, and charge the battery
immediately after discharge. The instruction
manual of the equipment should contain information telling the user not to overdischarge the
battery and to charge the battery immediately
after the use of the equipment (discharge). Even
if discharge of the battery is stopped before
voltage decreases to such a level that the batterydriven equipment stops being operational, deterioration of the battery may be accelerated by the
so-called sulphation phenomenon if it is not
recharged after use. The low voltage cut-off
circuit should be designed so that it can completely cut off the discharge current including a
weak current.
(3) If a charge method and a charge condition other
than that described in the specification and the
technical brochures is to be adopted, charge/
discharge characteristics and life characteristics
of the battery should be thoroughly checked in
advance. The adoption of adequate charge
methods and adequate charge conditions are
crucial to ensure safe use of the battery and for
fully utilizing the battery capacity.
(4) For the cycle operation of the battery (application
of the battery as the main source of power by
repeating charge and discharge), use a charger
which operates by controlling either the charge
period or charge quantity. Continue charging the
battery for the time specified or until the charge
completion lamp, if provided, indicates completion
of charge. If charging is suspended before
completion, the service life of the battery may be
shortened.
(5) Avoid parallel charging of batteries in cycle use,
as this may shorten the service life of the batteries by causing an imbalance in charge/discharge
state among the batteries connected in parallel.
(6) During trickle or float charge of the battery,
measure the total voltage with a high-accuracy
voltmeter of Class 0.5 or better. If the voltage
readout does not meet the specified value,
investigate the reason and take proper measures.
A total voltage that is lower than the specified
value indicates insufficient charge which may
reduce the battery capacity; a voltage higher than
specified indicates an overcharge which may
shorten service life of the battery or cause
problems such as thermal runaway in some
cases.
(7) Make sure to turn off the switch of the battery
equipment after use, otherwise excessive
discharge may cause deterioration in battery
performance and shorten service life.
(8) When the equipment is not used for a long period,
remove the battery from the equipment, charge it
fully, and store it in a place where humidity is low.
Unsatisfactory storage conditions may cause
deterioration in battery performance, shorten
service life and could cause rust to form on the
terminals.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
6. Maintenance and checking
WARNING
(1) Clean the battery with a slightly damp cloth,
ensure there is no excess water on the cloth by
squeezing it well. Do not use a dry cloth or a
duster, as it may cause the battery to generate
static electricity, leading to possible ignition and
bursting of the battery.
(2) Replace the battery with a new one within the
time period specified in the instruction manual or
equipment.
• Follow the guideline which states the battery
should be replaced when its capacity has
decreased to 50% of the initial capacity (at an
ambient temperature of 77°F (25°C) or below).
In the trickle or float application of the battery
(application as stand-by power) at an ambient
temperature higher than 77°F (25°C), the period
for which the battery can be used before
replacement is shortened by a half for every
10°C rise of temperature. When the discharge
current becomes higher than 0.25 CA, the run
time and battery life is also shortened.
• The usable period for the battery is markedly
shortened near the end of its service life (when
discharge time has decreased to 50% of the initial).
This is also the period when battery problems such
as internal short, dry-up of electrolyte (increase in
internal resistance) and corrosion of the cathode
grids will occur. Replace the battery before these
conditions are reached: if the battery continues to
be used under these conditions, maximum discharge current will continue flowing, which may
lead to thermal runaway or leakage.
CAUTION
(1) Do not apply organic solvents such as paint thinner,
gasoline, kerosene and benzene or liquid detergents to the battery. If these are brought into contact with the battery case, it may crack, causing
leakage.
RECOMMENDATION
(1) Keep the terminals of the battery clean. Dirty
terminals may cause inadequate contact of the
battery to the equipment body, leading to power
failure or charge failure.
7. Emergency measures
WARNING
CAUTION
(1) The battery contains diluted sulfuric acid, a very
toxic substance. If the battery leaks and the
liquid inside spills on the skin or clothing,
immediately wash it off with plenty of clean
water. If the liquid splashes into eyes,
immediately flush the eyes with plenty of clean
water and consult a doctor. Sulfuric acid in the
eyes may cause loss of eyesight and acid on
the skin will cause burns.
(1) If any corrosion of the terminals, leakage or
deformation of the case of the battery is found, do
not use the battery and turn off the power supply. If
a battery which is irregular or substandard in any
way continues to be used, leakage, fire or bursting
of the battery may occur and there is also a
potential for electric shock.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.
PRECAUTIONS FOR HANDLING VALVE-REGULATED LEAD-ACID BATTERIES-CONT.
8. Storage
CAUTION
RECOMMENDATION
(1) Store the battery in a stable position so as to keep
the terminals of the battery away from any metallic
or other conductive material (including items that
may fall or drop onto the battery).
(1) During storage of the battery, charge it at least
once every six months (when ambient
temperature is 77°F (25°C) or below). Shorten the
interval of charging to a half by every 50°F (10°C)
rise of ambient temperature. The rate of self
discharge of the battery doubles for each 5°F
(10°C) rise of ambient temperature. If the battery
has been stored for a long period in a discharged
state, it may not be able to regain it’s capacity
even if it is recharged.
(2) Protect the battery from rain. If the terminals of the
battery come into contact with water, they may
corrode.
(3) Keep the battery in the upright position as a
general rule, and do not apply abnormally strong
vibrations or shocks to the battery. Transportation
of the battery in an abnormal position or the
application of abnormally strong vibrations or
shocks to the battery may cause damage to the
battery and the deterioration of characteristics.
(4) When storing the battery, remove it from the
equipment or disconnect it from the charger or the
load and keep it in a place where temperature is
low. Do not store the battery under direct sunlight
or in high temperatures (140°F (60°C) or higher)
or in a highly humid atmosphere, because rusting,
deterioration of performance and life of the battery
may occur.
(2) If the battery is stored for a year or longer without
being charged, its service life may be shortened.
(3) Store the battery after fully charging it, otherwise
its service life may be shortened.
(4) Use the battery as soon as possible. The battery
gradually deteriorates during storage and thus its
decreased capacity may be irreversible even
allowing when recharged.
9. Disposal of batteries
CAUTION
(1) In countries where there are legal or voluntary
regulations on the recycling of rechargeable
batteries, please provide written information on
recycling of rechargeable batteries with the
equipment, packaging, instruction manuals, etc.
(2) Adopt methods and measures for equipment
design and battery mounting that will allow for
easy removal of batteries for replacement and
disposal.
(3) Used batteries are recyclable. When returning
used batteries, insulate their terminals with
adhesive tapes, etc., otherwise the residual
electricity in used batteries may cause a fire or
explosion.
(4) This battery is fully recyclable and should be
accepted at any location that accepts common
automotive starter batteries. Examples of places
that accept these batteries are: County or
municipal recycling drop-off centers, scrap metal
dealers, and retailers sho sell automotive
replacement lead acid starter batteries. In North
America, non-consumers can call 1-800-SAVLEAD for assistance in recycling.
Refer to the SAV-LEAD section in the back of this
handbook for complete instructions.
VRLA BATTERIES
AUGUST 2003
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject
to modification without notice. Contact Panasonic for the latest information.