Battery-lead-acid battery polar plate vulcanization method:Lead batteries can produce a white crude grain sulfate. Since it does not convert to nest or sea-brown lead during normal charging, not only the effective reaction substances of the plate, but also block the pores of the plate, so that the actual capacity of the battery is decreased, and the battery will be scrapped in a serious time. Environmental pollution. Practice has proved that more than 90% of the battery-off-morning newspapers are caused by a polar vulcanization.
1. Causes the cause of a plate vulcanization
(1) The battery is often used in the case of insufficient electricity, especially when the voltage drops below 1.7V, still in large current discharge;
(2) The used battery is not used for a long time and is not properly maintained, and no recharging is performed.
(3) Electrolytic solution density is often too large;
(4) The height of the electrolyte liquid is too low, and the upper portion of the plate is exposed, and the active material is oxidized to form sulfate of crude grains;
(5) The concentrated sulfuric acid or distilled water with the electrolyte is not pure, internal short circuit, self-discharge or external leakage;
(6) The battery continues to be used in the case where the electrolyte temperature is above 45 ¡ã C.
2. Phenomenon of battery polar plate vulcanization
(1) There is a white frost on the plate, and sometimes it can be seen by the small cover of the hemata;
(2) The actual capacity of the battery is significantly reduced. When checking with a high-rate discharge meter, the single voltage is significantly reduced;
(3) The actual capacity of the battery is significantly reduced. When checking with a high-rate discharge meter, the single voltage decreases significantly.
(3) The single voltage rapidly rises rapidly to about 2.8V, and the electrolyte density is not obvious. The charging time is short, and the electrolyte produces a lot of air bubbles;
(4) The positive electrode plate removed from the battery is light brown or orange (normal color should be dark brown), the negative plate is shallow gray or floraned gray (normal color should be dark gray), and the plate Hard crisp;
(5) The vulcanization of the battery is mostly on the negative plate.
3. Judgment method for battery polar plate vulcanization
(1) Enter the launch method. When the vehicle is started, if the starter is difficult to rotate, the light is red and the light is turned off and quickly extinguished, and the battery transition discharge or severe vulcanization.
(2) Battery charging method. When the battery is started, if the voltage is rapid, the single voltage is higher than 2.8V and generate a lot of bubbles, and the electrolyte density is not changed, and the liquid temperature rises very fast, the battery shell is hot, then the battery polar plate vulcanization .
(3) Use a high-rate discharge coupling method. Test the battery with a high-rate discharge gauge, the entire battery is electrically and the single battery has a very low voltage, or some single-handed battery no electricity, the internal deformation or vulcanization of the battery is severe.
(4) The hardness and loudness of the polar plate. Unpack the battery, remove the plate, one is more and brittle, the sound is loud, the second is a lot of bubbles on the surface of the plate, the surface active substance is in a paste, and it is not marked with the normally, but there is a fragranate, Their plate is vulcanized.
(5) Observe the electrolyte liquid surface. Uncover the recessor cover of the battery, carefully observe the height of the electrolyte liquid, if the liquid surface is lower than the protective plate 10-15mm, then the electrolyte high is insufficient, the active material on the polar plate portion of the air is easily oxidized. The crude grain crystalline sulfide is precipitated and vulcanized.
(6) Measure the electrolyte density method. The density of the lead battery electrolyte is typically between 1.2-1.38 g / ml, its minimum allowed value of 1.158 g / ml, when the density of the electrolyte is much smaller than 1.158 g / ml, the polar plate of the battery is serious. vulcanization.
(7) Observe the polar color method. Remove the positive and negative plates of the battery, observe its color, if the positive plate is light brown or orange (normal color should be brownish yellow), the negative plate is shallow gray or flora (normal color should be gray), plate The active substance is inserted or partially detached, and the plate is vulcanized.
4. Repair method of battery polar plate vulcanization
The high concentration of acid in the battery is reversed to distilled water to reduce the sulfate ion concentration in the contained fluid, speed the dissolution of sulfate, and eliminate the vulcanization of the plate. The repair step is:
(1) Unpacking the battery, classify the polar plate in vulcanization (which is lighter for the degree of vulcanization, without disassembly, directly according to this method).
The degree of vulcanization of the plate is mainly determined according to the hardness and loudness of the plate. If the plate is hard, it means that the polar is serious, and the sound is tapped and the nails are not easily drawn.
The plates that can be used can be clearly visible, and the active substances are not blurred or unlameled into sand, perforated or bubbles. If the finger touch polar plate is broken, the surface is blurred, and the living property is in a paste, or there are many bubbles, and the polar plate is severe, such a plate cannot be repaired.
After the polar plate is classified, the same panel having the same degree of vulcanization into a group, so that the degree of vulcanization in each monobi in the same battery is substantially the same.
(2) Put the selected plates in hot water and clean and dry. The same plate is welded to the clean battery shell together, and the upper cover is not sealed to check the sulfur at any time.
(3) Distilled water is added to the battery case, so that the electrolytic sulfur can be performed after 4-6 hours of 4-6 hours.
With the 1-20 current of the battery rated capacity, the electrolyte density in the shell is 1.2-1.25 g / ml, then the current is lowered, and the battery is charged 1-30 current, until the sulfur is complete (general continuous electrolysis) 40 hours, you can go all sulfur).
In the electrolysis process, the electrolytic solution density and voltage should be checked every 3-4 hours. If after 35 hours of electrolysis, the density of the electrolyte is not increased, the single voltage can be kept at 2-2.5V, and the bubbiness is fierce, that is, the plate should be taken out, see if it is all sulfur. If the sulfide on the surface of the plate has been removed, the plates are all soft. If the four angles of the plate still have a hard, the sulfur is required again, and the distilled water is replaced, and the flow rate is 2/3 of the first electrolytic sulfur, and then charge 10-15 hours. Lu Sheng Battery France Road Sheng Battery
(4) After the plate is removed, the electrolyte is poured out, rinse, and load it into the battery, install the cover, seal the glue. After the normal electrolyte is added to the battery, it can be charged according to normal standard.
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