> The valve controls the seal lead-acid battery
(VRLA) not to have the pollution by its seal, to exempt the
maintenance, 自放?is small and so on the characteristic obtains
the widespread application in the electrical power system, usually is
called "exempts maintains the accumulator cell"; Because in the
actual maintenance work, is frequently mistaken as the accumulator
cell which is does not need to maintain, but "exempts the maintenance"
is not does not maintain, it is opposite to the original opening rich
fluid lead-acid battery maintenance quantity few says. The
electrical power system is big with the VRLA general capacity, mostly
took direct-current power supply reserve, throws under the power cut
and the accident condition uses. When electric power severance,
many important equipment must depend on the accumulator cell to
maintain the movement. Therefore must pay great attention to the
lead-acid battery in the routine work the maintenance method, from the
ambient temperature, the discharging current, the discharge time,
synthesis maintenance and so on sufficient 浮充 voltage, can
guarantee the battery capacity and the service life, avoid when the
electric power accident power cut brings the serious economic loss.
□?
1 accumulator cell general maintenance management
1.1 regular inspections and maintenance
浮充 the movement is the accumulator cell best
movement condition, when the movement the battery is at completely the
electrically charged condition, the battery can achieve the longest
service life under this condition. Usually the accumulator cell
should work in 浮充 the condition.
The maintenance battery room is clean, prevented because the
insect and the mouse have the battery to short-circuit the accident.
Inspects the battery 极柱, whether the safety valve does have
infiltrates the fluid and the acid fog overflow. Every half year
inspection connection are partial whether has becomes less crowded,
rescrews tight 连接?the bolt.
1.2 correctly establishes the battery the movement management
parameter
The accumulator cell in 浮充 or the sufficient
situation, its voltage should act according to the different factory
and the ambient temperature makes the appropriate readjustment.
Table 1 has enumerated the partial batteries factory movement
management parameter.
1.3 regular nuclei allow to experiment
The regular nucleus allows to experiment divides two
kinds: One kind is carries on entire sufficient all puts, this
work also is called activation processing or the physical therapy
sufficient electric discharge; Through the electric discharge
and the charging-up circulation, enable the active material to obtain
the restoration. This experiment generally is does the nucleus
accommodates when the experiment carries on (1 ~ 2 years 1);
Another kind is the checkup experiment, general discharging
current 0.2 Q5, emits the rated capacity 50% ~ 60%, according to the
discharging curve appraisal capacity of storage battery,
simultaneously to the accumulator cell is the maintenance function.
1.4 new old batteries cannot mix use
When design emergency power supply capacity of storage
battery must consider the host equipment expands accommodates the
situation, the new old battery cannot mix uses, otherwise when city
electricity severance the big electric current electric discharge or
the charge will have the security hidden danger existence. In
2000 Guangdong has occurred because in different time investment
蓄电池组 when delivers the load because the aged degree
differently creates the power source accident which trips one after
another.
2 accumulator cells management and maintenance improvement
measure
2.1 过充?has the very tremendous influence to the
accumulator cell service life
1) may use the VRLA accumulator cell to corrode the
model to explain that, In accumulator cell positive electrode
electric potential because 过充?elevates to the certain voltage
time, the positive electrode starts to analyze the oxygen, the
corrosion rate sharp growth, 铅版 the grid starts to appear porous
PbSO4, to create VRLA accumulator cell loss of life.
2) the VRLA accumulator cell 浮充 electric current is
extremely sensitive to the temperature, the temperature every time
changes 10 ? the electric current becomes doubles the change, the
identical charge electricity flows off, temperature increment, 浮充
stepping down of voltage. Therefore if does not carry on
temperature compensation possibly to cause the controller prematurely
to shut off but the battery actually not to fill, causes the battery
to form the memory effect for a long time, the capacity drops;
But 过充?caused the accumulator cell to play the water
electric tank role, had the warm dehydration, the electrolyte has
lost, creates the accumulator cell expiration. Must defer to the
product instruction booklet to the battery charging voltage to carry
on temperature compensation, simultaneously must carry on temperature
compensation to the sufficient valve value.
2.2 strengthens the accumulator cell the management to carry on
the computer data management
Because the electrical power system specially is are
more and more many with the accumulator cell in nobody duty station
quantity, simultaneously because scene accumulator cell factory,
capacity respectively different, therefore has the necessity to
strengthen the accumulator cell management, accommodates the
experiment when the nucleus should promptly examine various monomers
battery voltage, after prevented the monomer voltage arrives the final
voltage to have the irreversible reaction, harms the battery.
Simultaneously records in the entire group battery a situation
worse battery, and periodic inspection, if the condition permission,
may use the special-purpose battery discharge instrumentation to carry
on the discharge of constant current, simultaneously records the
battery voltage and the discharging curve record; Accumulation
accumulator cell performance primary data. The discharge of
constant current meter restores to the capacity of storage battery
uses the resistance, the carbon stick electric discharge security,
simultaneously causes the accumulator cell electrochemistry response
to be stable. Prevented the battery because the variable current
electric discharge has produced is not normal 温升.
2.3 accumulator cells rethrow transport
Rethrows in 24 h which transports to belong to the key
surveillance time, must strictly according to the correlation
parameter establishment charging current, the voltage; And 8 h
records the accumulator cell the voltage, the temperature, the
electric current and the total voltage. And avoids is but
actually frequent when the floodgate operation making the accumulator
cell the maintenance.
2.4 full uses advanced reliable equipment
If the portable program control electric discharge
meter, the monomer accumulator cell restore the meter and so on, but
this equipment component mainly or in communications system
application more, suits the electrical power system the large capacity
equipment to be less. Simultaneously fully uses the existing
experience to strengthen to the capacity of storage battery estimate
research. □?
3 breakdowns processing
Because the accumulator cell is the important emergency
power supply, must prevent in the accumulator cell maintenance because
蓄电池组 the withdrawal loses the direct-current power supply the
accident, arranges the good maintenance plan.
1) regarding owes for a long time sufficiently causes the
capacity of storage battery to be insufficient 蓄电池组 uses 10 h
discharge ratio to carry on entire sufficient all puts, enable the
active material to obtain the restoration.
2) must closely pay attention regarding the exceptional cases
very bad battery, carries on the capacity restoration to this part of
battery. Withdraws the movement it. Carry on the
sufficient electric discharge with the spare charge screen or the
portable battery charger and the pressure regulator to it. □?
4 concluding remark
Above is to the electrical power system lead-acid
battery maintenance use discussion, hoped through strengthens to the
electrical power system with the accumulator cell maintenance and the
research, the enhancement direct current system stability,
simultaneously searches in the routine maintenance the insufficiency,
achieved the enhancement power supply reliability, avoids occurring
because the direct current emergency power supply causes power supply
accident.
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