Normal (battery) The active material on the positive and negative plate is mostly the active substance of the positive and negative plate, which is largely spread in the plate, and it is easy to rehabilitate the original neutral lead and sponge shape when charging. Lead, this is a normal sulfate effect. Usually, the plate sulfate is referred to in an abnormal condition. Because the battery is inappropriate, the long time is lacking, or the semi-discharge condition, the excess discharge or discharge is not timely charge, the internal short circuit, the electrolyte density is too high, the temperature is high, the liquid level is low to reveal the polar plate. Sulfate. This is because the recrystallization effect is formed on a plate due to the recrystallization effect, which is poor, the volume is large, and the micropores of the plate can block the micropores of the plate, hindered the soaking effect of the electrolyte, which added a resistance, when charging It is not easy to rehabilitate, becoming non-reverse sulfuric acid lead, reducing the active substances of electrochemical antifourn in the plate, thereby greatly decline.
First, the phenomenon and treatment of sulfate sulfate
1, the phenomenon of polar sulfate is as follows:
A. When the sulfate battery is in normal discharge, the capacity of other normal batteries is significantly reduced.
B. The electrolyte density is lowered at a normal value and is backward in a long period of time.
C. The voltage rises rapidly in the charging process, up to 2.9 volts / single, about 2.7 volts / single, and the voltage drop in the discharge process is very fast, 1-2 small within 1.8 volts (10 hour rate discharge).
D. The bubbles are too early in the charging process.
E, the plate color and condition are not normal. The positive electrode plate is light brown (normal dark brown), the outer surface of the plate has a white sulfate, and the negative plate is grayish and white (normal gray), and it feels the thickened sulfate crystallization of the thick particles when touching the polar plate. The plate is hard.
Second, the battery of the battery is one of the main reasons for battery damage. Treatment plate sulfate is a relatively difficult and messy operation, depending on the above three types of treatment depending on the degree of sulfate of the plate.
a, overcharge method. Suitable for non-severe batteries of sulfate. The electrolyte in the battery is gradually added to the pure water, and the liquid surface is higher than about 20 mm, and charging is performed with 0.1 C20A (the extra capacity value of the C20 battery). When the voltage rises to 2.5 volts / single, stop for half an hour, modify the 0.025c20a small electric flow to the day and night (more than 100 hours) until the voltage, the specific gravity is stable, and the polar white spot disappears. Adjusting the electrolyte density of 1.280 g / cm3 1 hour before stopping charge.
b, repeat charging method. Sulfate is severe, and the capacity is only half of normal batteries. The electrolytic solution is poured with the pure water, and the liquid surface is about 20 mm higher, and the current is charged with 0.1C20A. When the voltage is increased to 2.5 volts / single, stop for half an hour, change the 0.05c20a current charge to charge When the atmosphere is half an hour, it will be charged with 0.05c20a to the voltage, density, etc. The value, otherwise it will be rechargeable.
After the charged battery is electrically powered by 0.05c20a, the discharge to the voltage is 1.80 volts / single, and the park is stopped for 1-2 hours, charging the current, charged, then discharge, if the capacity is advanced, white spot When it is not eliminated, then charge it, repeat the number of days to carry out the number of days until the discharge is close to the extra capacity, and the white spot is completely eliminated.
C, hydrotherapy (repeating charge disc). Suitable for sulfate is extremely severe, and the capacity has no battery with half of the extra capacity. The battery is discharged to the voltage of 1.8 volts / single, (with a 10-hour current) to pour the electrolyte, inject the pure water, the liquid level is higher than about 20 mm of the polar plate, stand for 1-2 hours, charged with 0.05c20a To the electrolyte density rose to 1.1-1.20g / cm3, the electrolyte density is changed to the electrolyte density until the electrolyte density is no longer rising, and the air bubble is stopped, and the air bubble is stopped, and then discharged from 0.02c20a to charge the air bubble. Paying attention to the amount of electricity should be far beyond the amount of power, so repeated forces or one month until it is stopped using 0.05c20a discharge to see the additional capacity of 75 or more.
Non-focused in the charging process, the temperature of the electrolyte must not exceed 45 ¡ã C, and it is assumed that the temperature be over 40 ¡ã C, the current should be reduced, or the charging is suspended, and charging is carried out when the electrolyte temperature is below 35 ¡ã C. If the temperature still can't fall, it should be considered a short-circuited problem in the battery.
The symbol of the polar panel eliminates the phenomenon of sulfate is: the battery in the charge and discharge process, the degree of bubbles, and other normal batteries should be combined with other normal batteries.
Third, the cause and treatment of the polarity and cracking of the battery
1. The battery is stopped after the number of times is stopped, because the grid is corroded, the intensity is small, the polar plate crack, especially the positive electrode plate is more severe, which is attributed to the normal period of life. However, because the use of protection is not correct, it will constitute the twists and turns of the plate and the corrosion of the grid, which has the following points:
A. The polar active substance is in the process of making the production process, and the battery changes caused by the electrochemical changes caused by the electrochemical changes caused by the polar plates during the production process. , Cause twists and turns and cracks.
B, large current charge or high temperature discharge, the active material induction is more intense, and it is easy to constitute an uneven electrochemical reaction to cause twists and turns.
C. The battery is used to store, the grid is saved, the grid is touched with more sulfuric acid and sulfate, and the grid corrosion is accelerated, and the plate grid rib and the plate crack are constituted.
D, excess charging or excessive discharge, adding the swelling and shortening of the inner-layer active substance, the rehabilitation process does not together, constitutes the twists and turns and cracking of the plate.
2, such as a polar plate crack, should replace the polar group into the battery, and the replacement polar group should not be too much to be too poor, because the pole is connected to the battery, even the new plate is also Will be restricted by other single-skinned poles and cannot play a better power. It is assumed that the plate has a small number of high-tech cracks, (for large, fixed batteries or thick plates), which can make the cracks out of the metal gloss, perform welding repair.
Fourth, the causes and treatment of excessive drop in active substances of the battery
1. Remove the pole group of the battery, check the sediments in the deposited tank, assuming that the active material is a few drops, it is allowed within the range of normal operation, and it is necessary to make a lot of time, and it is necessary to analyze the cause. And processed.
A. The bottom of the battery slot is concentrated in a short time in a short time, which is illustrated in the self-positive plate, and because the charging current is too large or often overcharge.
B. When the deposit is white, it is because it is often over-discharge, causing the active material to deposit a lead deposition of sulfate, or impurities in the electrolyte, particularly too much chlorinated amount, and constitutes lead deposition of chloride.
c, deposits constitutive brown, light blue, white mutually overlaps, accumulate, clarify the harmful substances such as iron and copper in the battery.
D. It is assumed that the dropped substance is discovered, and the electrolyte is not pure, the density is large or the battery charge and discharge is high, and the polar can be corroded. It is assumed that the deposit is a block, and the lead paste quality process is poor, and the active substance is dropped in the battery mount.
The excessive drop of the active substance, on the one hand, the battery capacity is lowered, and the other aspect is easy to constitute a positive and negative plate short circuit at the bottom of the battery, so that the battery is used to stop the battery.
2, assuming that because the active material is dropped, the bottom of the plate is shorted, the demand will extract the pole, take out the deposit, remove the pole short circuit area, put the board in the battery, replace the new electrolyte, and charge it with a smaller current And adjust the electrolyte density and liquid level at the later stage of charging to use the battery rehabilitation.
V. View and handling of battery short circuit
1. Short-circuit phenomenon is reflected in: The battery is low, the electrolyte density is low than other batteries, and the air is not taking gas or the air is present late. The electrolyte temperature is higher than other single-single battery, and the electrolyte density and charging voltage rise. Less or unchanged. The capacity is small, the voltage drop is fast, easy to attack the plate sulfate, and the polar group is removed from the positive electrode plate from dark brown to light brown, the negative plate from light gray, and the hand is hard and there is a short circuit phenomenon .
The reason for the internal short circuit in the battery is that the conductive object falls into the battery constituting the positive and negative plate short circuit, or "lead beans" is constituted between the positive and negative electrodes during the welding. The diameter of the separator is perforated or the aperture of the polar plate is formed by the "lead velvet" penetrating the separator, which constitutes a short circuit, and the polar panel is deformable to damage the separator or the active material, and deposited on the lower edge of the plate.
2, unscrew the exhaust gas, directly observe the short circuit between the non-conductor falls into the constituent plate, if there is, take out the conductive object. The battery is charged, the positive and negative plate is not spurred, and the temperature meter is measured. The temperature of the positive and negative plate is high, and the thin plastic sheet can be inserted, gradually moved, and the short circuit object between the plates is removed. When eliminating directly eliminates, tangential battery pole groups of the occurrence of the episode, the conductive objects and sediments are collected, and the partition is not damaged. If it is replaced, the partition is replaced, and the battery is corrected.
Sixth, view and process of reverse pole
1. The inverse phenomenon is reflected in two aspects, one is because the mounting monarch pole pole group is reversed, and on the other hand, the battery is used because a single battery capacity is lowered, and even thoroughly lost capacity. This battery will not only discharge, but will be reversed, the original negative electrode becomes a positive electrode, the original positive electrode becomes a negative electrode. This problem can be found from the total voltage of the battery. When a battery is reversed or referred to, not only the 2 volt voltage of the battery, but also add 2 volts reverse voltage, a total of a total cost voltage 4 volts.
2, after the battery is filled, the first voltage meter is measured by the voltage meter, and the battery is 12 volts, such as the measurement voltage of about 8 volts, clarifies that one monobath battery is reversed, such as the measurement voltage of 4 Rod, clarify two monobi-pole, then eliminate the measured individual batteries, such as polarity, clarify the monobic battery. These batteries that make up the reverse pole are needed to repair. Because the positive and negative plate filling agent is different, even if it continues charging, the positive and negative plate is forcibly transform, and its capacity and birthday number will also have a great impact.
It is assumed that the polarity of the problem is still normal, but the opening voltage is very low, this clarifies that there is no real reaction, if it does not find and sweep, follow the time, will present a true reaction. The battery in which the battery is used, should be filled separately, and the tolerant reaches the requirements in the future, and can be used in series with other batteries.
Analysis of the phenomenon of battery capacity decline
The battery does not reach additional capacity requirements or the lack of capacity, the primary should consider the lack of battery initial charging or lack of charging, check whether the density of the electrolyte density is low, and there is a phenomenon of rising density after charging, assuming the density constant, The external line is not dredging, the resistance is large.
The battery capacity assumptions have gradually declined, see if the plates have a sulfate phenomenon, whether the electrolyte is mixed into harmful impurities, and the battery is partially short-circuited. Battery is used for long-term roll corrosion due to time, and the electrode cracking, the active material is excessively dropped, and the treatment measures are taken.
The battery has a decrease in capacity, and should first look at whether the battery terminal has a white sulfate-de-output, and the measurement voltage has a battery inverse polarity. Is there a short circuit inside whether the battery is short, whether there is a polar plate or the entire pole drop Phenomenon.
8. Analysis of the vaporization of battery voltage
The battery is fully charged, each monobi battery should be around 2.1 volts.
The battery is low in initial voltage, and it should be checked whether the charging is thoroughly, whether the electrolyte density is low.
The battery is high at the time of charging, and there are many bubbles together, and the voltage is lowered when the discharge is used, and the electrode is now elucidated, and it should be treated.
The battery is in use, the open circuit is significantly dropped, sometimes many different, and should look at whether the battery has an anti-polarity, short circuit, and corrects the method in accordance with the methods mentioned earlier.
Nine, analysis of the phenomenon of ventilation
After the battery is used, the charging initial battery should not take the air, the current is used to end the electrochemical reaction of the active substance, follow the end of the electrochemical reaction, the current starts electrolysis water, the positive electrode is divided into oxygen, and the negative electrode is separated from hydrogen. The final current is thoroughly used to electrolysis, exhibit a number of uniform bubbles between the plates, in the discharge process, the plate active substance becomes the lead and water of the water.
After the battery is used, charging is carried out, and the end of charging is not taking gas or taps, and the charging current is too small, or the battery charge is not enough. The battery does not ventilate after sufficient charge, clarifies that there is a short circuit inside, and does not vent the polar plate between the short circuits, and the polar plates not short-circuited are exhausted, so that there is less air in the single battery or Phenomenon of non-uniform ventilation.
The battery is too early and many tapping, and it is elucidated that the plate has a sulfate phenomenon, and the demand is repeatedly charged.
Sometimes the battery is placed or tapping in the discharge process, and the electrolyte impurities is more, and the demand replaces a pure electrolyte. Other ways to charge the battery, place it for 1 hour to discharge, so that the residual discharge is presented when charging, and there is a balanced process inside the battery.
Ten, analysis of high phenomena of electrolyte temperature
The electrolytic liquid temperature after the new battery is alifted is due to the oxidation of the negative electrode plate, and after the sulfuric acid is added, the electrolyte temperature should be lowered to about 30 ¡ã C, or charging with a small current.
When charging is charged, the electrolyte temperature is high, sometimes beyond 45 ¡ã C, and should be too large if the charging current is too large. It should be less than 0.1c20 amps, or use 0.05c20 ampere charging. It is assumed that the temperature can not fall, and the internal plate short circuit, or a plate sulfate, the former current will be heated in the short-circuit part, the latter The cells of the sulfate, the voltage is mostly charged on the resistor, so that the electrolyte temperature is increased, which is demand to summarize the battery problem.
It is also possible to cause partial heating and demand from head welding.
Eleven, analysis of electrolyte density and color abnormal phenomenon
In the charge and discharge process, the electrolyte density should be changed between 1.070-1.290g / cm3. When charging is charged, the electrolyte density is lowered during discharge. The electrolyte density is too high, easy to constitute a plate sulfate and speed the grid corrosion, and the density is too low, and the discharge capacity is affected.
After the battery is applied, the electrolyte is low in the state of no loss, and the electrolyte density is less or unchanged in the charge in the charging, and the electrode plate has a sulfate phenomenon, and the demand is eliminated.
The battery is charged. During the placement period, the density decreases, and the battery self-discharge is severe, and the impurity in the electrolyte should be replaced with the electrolyte.
The electrolyte color, the smell is abnormal, and there is a turbid deposition, which may be due to the non-purity of the electrolyte, the battery falls into the dust or other impurities, the active material falls seriously, this condition requires electrolyte, and flushed the battery internal. To pay attention to the battery charge and discharge current should not be too large, the electrolyte temperature should not be too high during charging, avoiding the reactive substance further fal
Recommend:
LiFePO4 Battery Manufacturer
Energy storage battery Manufacturer
Integrated machine energy storage battery series Manufacturer
Lead lithium battery Manufacturer
Outdoor Backup Battery Manufacturer
Portable outdoor power supply Manufacturer
Power battery Manufacturer
Powerwall LiFePO4 Battery Manufacturer
Battery rack Manufacturers
Telecom LiFePO4 Battery Manufacturer
Wall mounted battery storage Manufacturer
China Lifepo4 Battery
Email:sales@geerady.com
