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What is a valve controlled maintenance battery?

Definition 1.

The valve control type no-maintenance battery adopts the newly designed fully sealing structure and modern production technology in the 1990s. It has high performance, long life, no pollution, no maintenance, safe and reliable performance.

Structure of 2.

General valve control type lead-acid battery is made up of positive and negative plate, plate, shell, electrolyte and wiring and other components of the pile head, the discharge of chemical reactions is depend on the positive plate active substances (lead dioxide and pb) and the negative plate active substances (spongiform pure lead) in the electrolyte (dilute sulphuric acid solution), under the action of the plate grid frame, traditional battery lead antimony alloy, maintenance-free battery is made of lead calcium alloy, the former with antimony, the latter with calcium, which is fundamental to both the mark. Different material can produce different phenomena: traditional battery will happen in the process of using liquid reducing phenomenon, this is because the gate frame of antimony can lead pollution on the negative plate spongiform pure, weakened after fully charged battery in the counter electromotive force, caused by excessive water decomposition, a large number of oxygen and hydrogen escape from the positive and negative plates respectively, reduce the electrolyte. Replacing antimony with calcium can change the anti-electromotive force of the fully charged battery, reduce the charging flow and reduce the evaporation rate of liquid, thus reducing the loss of electrolyte.

Due to valve control type free maintenance battery USES lead calcium alloy grid frame, charging during decomposition of water quantity is little, low moisture evaporation, and the outer seal structure, the release of acid gas is very few, so it is compared with the traditional battery, do not need to add any liquid, pile head for wiring, wire less corrosion, overcharge resistance is strong, large starting current, power advantages of long storage time.

Valve control type free maintenance battery because of its under normal charging voltage, electrolyte to produce only small amounts of gases, plate has a strong ability to resist charging, and has a small internal resistance, cold starting performance is good, than conventional battery service life is long, etc, and therefore does not need to add distilled water throughout the duration, the charging system under normal circumstances, do not need to supplement charge from removed. However, the proportion of electrolyte should be checked during maintenance.

Most valve control maintenance accumulators have a hole - shaped liquid (temperature compensated type) on the cover, which will change the color according to the change in the proportion of the electrolyte. The battery can be instructed to hold electrical state and the liquid level of the electrolyte. When the indicator eye is green, it indicates that the charge is sufficient and the battery is normal. When indicating that the green dots are small or black, the battery needs to be charged. When the indicator is light yellow, it indicates that there is a fault in the battery and needs to be repaired or replaced.

The valve control type no-maintenance battery can also be recharged, which is basically the same as the charging method of the ordinary battery. The voltage should be limited to 2.3 to 2.4 volts when charging. Pay attention to using conventional charging methods to charge a lot of water, and the charging current should be slightly smaller (under 5A). Can't charge fast, otherwise, the battery may explode, causing the injury. When the maintenance battery's hydrometer is shown as pale yellow or red, it indicates that the battery is close to scrap, even if recharged, the service life is not long. Charging can only be a quick fix.

When conditions are available, a charging device with a current-voltage characteristic can be charged to the valve controlled no-maintenance battery. The device can guarantee sufficient electricity and can avoid the use of more water when charging.

General this type of valve control type free maintenance battery from the factory to use can hold 10 months, its voltage and capacitance remain unchanged, the poor quality of about three months after the factory of the voltage and capacitance will fall. Choose when buy is 3 months from the date of production, you can check the battery voltage and capacitance on the spot whether meet the requirements of the directions, if there is a decrease in the voltage and capacitance of the material is bad, it is inside so that the quality of the battery must also not line, it is possible that water battery after charging distributor in disguise.

Principle 3.

When charging, electrical energy is converted into chemical energy, and chemical energy is converted into electricity when discharged. When the battery is discharging, the metal lead is negative, oxidized and oxidized to lead sulphate. Lead dioxide is the positive electrode and the reduction reaction is reduced to lead sulfate. When the battery is charged with direct current, lead and lead dioxide are produced at the poles. After removing the power, it returns to the pre-discharge state, forming the internal dynamic balance of the chemical battery. The lead accumulator is a battery that can be recharged, discharged, and called a secondary battery.

The reaction chemical equation of lead acid battery is as follows:

The discharge -

PbO2 + Pb + 2 - h2so4 ≒ PbSO4 + 2 h2o + PbSO4

Please charge

4. Classification and characteristics

There are four main kinds of accumulators, which are common battery, dry charge storage battery, wet charge storage battery and maintenance battery.

1) common battery

The plate of the ordinary battery is composed of lead and lead oxide, and the electrolyte is the aqueous solution of sulfuric acid. Its main advantages are voltage stability and low price; The disadvantage is that it is lower than the capacity (i.e., the amount of energy stored per kilogram of battery), short service life and daily maintenance.

2) dry storage battery

: it is the full name of dry charged lead-acid battery, it is the main characteristic of negative plate has higher storage capacity, in the condition of dry completely, can save the electricity generated by in two years, when using, need to join the electrolyte, etc. Can be used in 20 to 30 minutes.

3) wet storage battery

The plates are charged with a small amount of electrolyte and most of the electrolyte is drawn into the separator and a storage battery stored in the plate.

4) maintenance of battery

Free maintenance battery is a very small amount of electrolyte due to its own structural advantages. There is no need to add distilled water in the service life. It also has the characteristics of shock resistance, high temperature resistance, small volume and small self-discharge. Life expectancy is about twice as long as an ordinary battery. There are two kinds of free maintenance accumulators in the market: the first one is to be used in the future without the need to maintain (add the supplementary liquid). The other is that the battery itself has been added to the electrolyte and sealed until it is left out of the factory. The user can't add the liquid at all.

Product features

1. Long life.

2. Low self-discharge rate.

3. Adequate capacity.

Use a wide range of temperature.

Seal performance is good.

Good conductivity.

7. Strong ability to recharge.

8. Safe and reliable explosion-proof exhaust system.

5. Use and maintenance

The maintenance battery can also be recharged, and the charging method is basically the same as the charging method of the ordinary battery. The voltage should be limited to 2.3 to 2.4 volts when charging. Pay attention to using conventional charging methods to charge a lot of water, and the charging current should be slightly smaller (under 5A). Can't charge fast, otherwise, the battery may explode, causing the injury. When the maintenance battery's hydrometer is shown as pale yellow or red, it indicates that the battery is close to scrap, even if recharged, the service life is not long. Charging can only be a quick fix.

When conditions are available, a charging device with current-voltage characteristic can be charged for the maintenance battery. The device can guarantee sufficient electricity and can avoid the use of more water when charging.

The proper use and maintenance of accumulators are as follows:

Check whether the stationary bolt of the battery on the bracket is tightened, and the installation of unfastening can cause damage to the shell caused by the driving vibration. Do not put metal on battery to prevent short circuit.

It is often used to check whether the pole and connecting head are connected reliably. The protection agent of vaseline can be applied to prevent the oxidation of the terminal.

No direct fire (short circuit test) can be used to check the battery's power so it can damage the battery.

The regular lead acid battery should be used to add distilled water regularly. The dry load battery is best to be charged before use. As for the maintenance of water free storage batteries, it is not impossible to maintain proper viewing and replenishment of distilled water when necessary.

The stomata on the cover shall be free. When the accumulator is charged, a large amount of air bubbles can be caused when the air hole is blocked and the gas cannot escape. When the pressure increases to a certain extent, the accumulator shell will burst.

5.2.1 residual acid in the acid pool, if less than acid pool, a quarter needs to conform to the technical requirements of pure water injection with acid pool, bringing it up to two-thirds of liquid level, according to join the amount of pure water, about 4:1 according to the proportion of join in conformity with the technical requirements of concentrated sulfuric acid. When adding concentrated sulfuric acid, the plastic mixer should be put into the acid tank to stir, then the concentrated sulfuric acid is slowly poured into the acid tank to prevent the sulfuric acid spatter.

5.2.2 with acid, should pay attention to the temperature of acid pool, when acid pool temperature greater than 60 ℃, stop immediately join the sulfuric acid, to stir in pure water or cooling, acid when the temperature drops below 45 ℃, then according to the need of acid proportion in pure water or acid to adjust.

5.2.3 requires the preparation of the electrolyte battery: stay with acid pool in the electrolyte temperature down to room temperature, the thermometer into the hydrometer and measuring its actual value, the actual temperature and the proportion of the electrolyte is conform to the requirements, according to the weight of the dilute sulphuric acid.

5.2.4 if preparation is not in electrolyte at room temperature, can be corrected by the following formula: d25 = dt + 0.00075 x (t - 25) (g/cm3) : type of d25 said conversion to standard temperature (25 ℃) under the density; Dt is the measured density; T is the temperature of the electrolyte when measuring the specific gravity.

In the vicinity of the battery pole and cover, there are often yellow and white paste, which is caused by sulfuric acid etching the root column, line card, fixed frame, etc. The resistance of these substances is very high and should be cleared in time.

The capacity of the battery should be the same when two batteries are used in series. Otherwise, it will affect the battery life.

The preparation of electrolyte of lead acid battery is not maintained

⒐ battery is placed for a long time, long term stop using battery charge should also be regular maintenance.

There is an internal battery self-discharge, self-discharge about 2% every day, that is to say, enough electric battery, even if not, after a long time, its saving electricity will also be internal self-discharge it finished. In the case of battery, the plate will soon be sulfuric acid, which will greatly weaken the storage capacity. As a result, the batteries that have been stopped for a long period of time should be charged with a battery charge for about 10 hours a month.

If the battery has been placed for a long time, there is a battery vulcanization phenomenon, which can be filled with the battery maintenance equipment for 20 days or so, and the capacity can be restored.

Maintenance method

1. Maintenance requirements

Check that the battery is fixed in the car.

2. Whether the battery cable is connected reliably and the air vent is dusty;

3. Check the charging status and quality status through the electric eye on the accumulator, green means qualified, black indicates the loss of power, and white indicates that the battery damage needs to be replaced.

Second, replenish the charge

1. If the vehicle or charging system fails for a long period of time, when the battery load voltage is less than 10V, the no-load voltage is less than 12.4v and must be recharged.

2. The method of charging constant current limit current charging method, multiple battery charging must be connected in series;

3. During the first stage of charging, the charging current of the charging current is 6A, which is charged by 1/10 of the battery capacity. Charging to an average of 16A battery voltage to the second stage of charging;

4. During the second phase of charging, charge the current with the battery capacity of x0.045, such as 6-qw-60 battery, and the charging current is 60x0.045 = 2.7 A. Charge up to 16V per battery and continue to charge for 3-5 hours.

5. When the electrolyte temperature exceeds 40 degrees during charging, it should stop charging, reduce current or physical cooling, and must stop charging when the temperature reaches 45 degrees.

6. Ensure a good ventilation between charging stations, no open fire and flammable materials;

7. Adequate electrical standards and green eyes.

3. Quick charging

1. Quick charging is limited to emergency measures which can not be started by the car, and the ordinary charging machine is adopted as far as possible under the conditions of time permitting;

2. Quick charging current is 3/10 of the battery capacity;

3. Quick charging time of no more than 2 hours.

4. Fault diagnosis of charging system

1, close additional electrical appliances, measuring the voltage of the battery polarity column under the engine speed, should be between 13.8 14.5 V, such as charging system lower than 13.8 V output capacity is insufficient, is higher than 14.4 V voltage regulator is out of control, need to check the specific cause of the problem;

Turn off all electrical appliances, disassemble the battery cable, and string a current meter between the cable clamp and pole column to measure the leakage current. Apart from the quartz clock and the normal power consumption of each control unit, if the leakage current is large, it can be removed from each insurance to see if the leakage is reduced.

3. If the color of the electric eye is green, but there is a situation where the driving speed is low, a battery detector should be used to check the battery discharge voltage. If the voltage is higher than 10V after charging, the voltage is lower than 10V. After charging, it may still have a loss of power and replace the new battery.

7. Precautions

1. Battery charge is dispatched from the factory to the installation. The battery capacity will be damaged to varying degrees. If the battery is longer, it should be recharged before it is put into use. If the battery storage period is not more than one year, the charge will be charged for 5 days at constant pressure 2.27 V/only. If the battery storage period is 1 ~ 2 years, it can charge 5 days after constant pressure 2.33 V/only.

2. When the battery is in charge, it should ensure that the floating charging pressure of each cell is 2.25 ~ 2.30 V. If the charging pressure is higher or lower than that, the battery capacity or life will be reduced.

3. When the battery is fully charged, the battery voltage should not be lower than 2.20v. If the unit voltage is lower than 2.20v, the battery should be charged in a balanced manner. The equilibrium charging method is: charging voltage 2.35v/only, charging time is 12 hours.

4. After the battery cycle is used, the constant voltage limit current shall be charged after discharge. Charging voltage is 2.35 ~ 2.45 V/only, the maximum current is not more than 0.25 C10 specific charging method is: first, with no greater than the current value of the current largest constant current charging, charging in the monomer average electrical pressure up to 2.35 ~ 2.45 V voltage switch to average monomer is 2.35 ~ 2.45 V constant voltage charging, until the end of the charge.

5. The full charge of the charging of the battery during the circulation of the battery: under the above current limiting condition, it can be charged under constant pressure condition, and the sign of sufficient electricity can be selected as the basis of the following two choices:

(1) the charging time is 18 ~ 24 hours (short of deep discharge time).

(2) the charging current value does not change for three hours at the end of charging.

(3) the constant voltage from 2.35 V to 2.45 V charging voltage value, is the environment temperature is 25 ℃ in the specified value. When the environment temperature is higher than 25 ℃, charging voltage to reduce accordingly, preventing overcharge. When the environment temperature is lower than 25 ℃, charging voltage should be improved, in order to prevent the under charge. Usually reduce or increase the size of the change for every 1 ℃ each monomer is 0.005 V.

6. The battery should be recharged immediately after discharge, and if the battery is shelved for too long after discharge, the original capacity can not be restored even if recharged.

7. When the battery is used, it is important to tighten the bolt of the terminal to prevent sparks and contact.

8. Application field

Marine equipment, medical equipment, alarm system, engine starting, electric tools, emergency lighting system, backup power supply, large UPS and computer backup power, peak load compensation energy storage devices, power systems, telecommunications equipment, control systems, nuclear power plants, power stations, fire and security systems, solar energy, wind power station.