What is a battery? Introduction of battery daily use maintenance precautions


  Author :Iflowpower – Portable Power Station Supplier

Lead-acid battery 1, the basic components: 1, the electrode positive and negative electrode 2 composed of two different materials, the two electrodes separated by the separator 3, the electrolyte 4, the battery slot cover positive and negative electrode: 1, consisting of active material materials and grid. 2, the positive electrode active substance is a lead (PBO2), the negative electrode active material is a sponge lead (PB) 3, and the use of a current flow reaction and the electrically conductive use 4 is an important partboard that determines electrical properties in the battery: 1, The use is to prevent positive and negative electrodes from being in direct contact and short circuit 2. It is a poor conductor for electrons and a good conductor 3 for ions.

It has porous properties, good acid resistance, oxidation resistance and hydrophilicity, low resistance, harmful impurities, etc. Requirement 4, material is important with microporous rubber, PE, PVC, PP, polyester and other electrolyte: 1, ion conductive applications between positive and negative electrodes 2, dilute sulfuric acid solution of 1.200 g / cm3 to 1.

350 g / cm3 Battery slot cover: 1, use 2, with good acid resistance, temperature resistance and insulation, and have good mechanical strength. Second, the basic working principle of lead-acid battery: charging process: When the charging end, when the charging voltage reaches the decomposition voltage of the water, the positive pole will have oxygen (O2), and the negative electrode will have hydrogen (H2). Lead-acid battery 5 hour discharge curve three, battery life: 1, battery life is calculated according to the number of times of charging discharge.

2. 3. Currently, the longest service life of the lead-acid battery for traction is 1500 times.

4, when the capacity of the battery drops below 80% C5, the battery life is generally considered to terminate. Fourth, the battery's self-discharge: the discharge of the battery is not due to work, called self-discharge. Battery self-discharge usually has the following reasons: excessive hydration causes surface discharge 1, adding acid or water containing impurities, long-term placement results in electrolyte moral layers 3, self-discharging hazard: energy loss, vulcanization, maintenance And maintenance one, daily maintenance 1, should clear the dust and dirt of the outer surface before use, and check if there is no damage, after inspection, according to the battery pack according to the battery pack.

2. Formulate an electrolyte according to the requirements of the use maintenance manual. 3, remove the liquid cover, inject the predetermined electrolyte into the battery to the specified liquid level height.

4. In accordance with the regulations of the instruction manual, the initial charging is performed. 5, after the initial charging and the battery used under normal conditions, the normal charging method in the usage maintenance manual should be carried out in accordance with the normal charging method in the maintenance manual, and the charge amount is about 1.

2 times the last discharge, but the first 5 times of the new battery Should be 1.5 times the last charge amount. 6, the temperature of the electrolyte in charge must not exceed 55 ¡ã C.

7. Due to the decomposition and evaporation of water in the electrolyte, the density increase and the reduction in the liquid level should be added; if the density caused by abnormal conditions is lower than the specified value, the density should be adjusted by 1.400 g / cm3.

Density adjustment should be carried out at the end of charging. 8, the surface, cable and bolts of the battery should be kept clean, dry. 9.

The battery is connected, it must be kept in good contact. 10, battery should prevent overcharge, over-discharge, strong charging and insufficient charging. 11, the battery is not allowed to fall into any harmful impurities.

12, the battery cover is not allowed to place any conductive items. 13. After the battery is discharged, it should be charged in time, and the maximum interval must not exceed 24 hours.

14. If there is a backward battery in the battery, it should be found in time, fix or replace it immediately. 15.

Inject the water or sulfuric acid solution of the battery, temperature should be between 10 ¡ã C ~ 35 ¡ã C. Second, constant current charging method generally uses a 10H rate or 20 h rate current to perform constant current charging. Third, the segmented constant current charging method is generally started with a 3H rate to 5 h rate current, when the terminal voltage reaches about 2.

4V, or when the liquid temperature is significantly increased, the current drops to 10 h rate to 20 h rate current to continue. Charging (also known as the decreasing current charge method). Fourth, equalization charging method will make the battery normal charging, stand up, stand for an hour, then use the normal charging second phase of the current to continue charging until it occurs when there is severe bubble, stop for an hour.

So repeated several times, until the voltage, the density remains unchanged, and then repeat the stubbubble immediately after the interval. 5. The limit flow constant voltage intelligent charging method first sets a constant current charging.

When the battery voltage reaches a certain value, automatically turn to constant pressure charging, charging current increases with the extension of charging time. Currently a better charger, after charging, add 1 ~ 2 pulse charge, which is charged for one hour, stop for an hour, then charge one hour. Sixth, constant pressure charging method is carried out in a constant voltage of 2.

3V to 2.5V, so the initial current of charging is quite large. As charging is carried out, the current is gradually reduced, and at the end of the end, there is almost no current through.

7. Supplementary charging method except for floating charge, although normal charging is excellent, after standing for a while, the capacity is reduced due to self-discharge, and therefore, according to the length of the shelving time, the current is appropriate to be appropriate. Charging, called supplemental charging.

When the battery is ready to use, the long-term shelving after charging is not used, and should be completed regularly (such as one month). Battery is in use, often there will be voltage, density and capacity imbalance. Balanced charging can prevent the occurrence of backward batteries in addition to the prevention of the above phenomenon, so that each unit cell of the same battery pack is a good condition in use.

Battery is in use, once a month, a balanced charging is. If there is any one of the following cases, it should be balanced charging: 1, the discharge voltage is often reduced to the termination voltage below 2, the discharge current value is often too large, the charge is not timely charging 4, the electrolyte is mixed into impurities At the time 5, when it is often charged, it is not used for a long time. 3.

All tools used, the material must be stored in a cleanly covered place 4, and the entire outer sulfuric acid trace and dust 5 must be circulated regularly 5. The contact devices between each unit cell and the connection to the wire must be safe and reliable. 6.

If the battery has a sealing cover and venting embolist, it must be checked and cleaned with the vent 7. It must be paid to the electrolyte surface, do not let the plate and the separator expose the liquid surface, 8, the electrolyte must be adjusted to normal density, and 9 can only be performed when the battery charges are terminated. During the discharge process, each monomer battery terminal voltage and electrolyte density can be checked, closely pay attention to the degree of discharge of the battery, and never allow the electrolyte density and the end voltage below the discharge requirements specified by the battery.

The level 10, the electrolyte temperature should not exceed the specified value of the specification, typically 55 ¡ã C 11, the charging current must not exceed the manufacturer 12, according to the instructions, periodically supplemental charging 13, if the battery is long-standing, in order to prevent excessive self Discharge and severe sulfate, supplementary charging at a month, does not allow battery discharge currents to exceed the maximum limit of the manufacturer, depth discharge 1, when the battery is in use, the discharge capacity is generally required to exceed its rated capacity 80 %, When the battery is released by more than 80%, we say that the battery has a depth discharge 2. When the battery is released by 80%, the capacity display on the forklift enters the red light area, and should immediately go to the charging place to charge. 3, deep discharge to battery hazard: vulcanization, easy to expand the polar expansive deformation active material caused capacity drop, life is shortened, etc.

Three, the storage battery is placed, the battery is allowed to be placed for a long time 2, long-term place no The liquid storage battery is supplemented once a month, preventing the electrolyte moisture layer 3, the battery that needs to be placed, should prevent direct sunlight in a well-ventored environment, if the near-storage battery is procured, it is recommended to purchase dry charge batteries Or dry the electric battery 5, if the battery has been purchased, before the long-term placement, it is recommended to reduce the specific gravity of the electrolyte to four. What low-temperature battery power is insufficient? In low temperature, the viscosity of the electrolyte has increased, resulting in difficulty in ion movement in the electrolyte, lowered, and the internal resistance of the battery increases, resulting in new battery consumption, therefore will express lack of power. 5.

Why is the battery that the battery is discharged? When the large current is discharged, the battery polar plate is quickly reacted with the acid in contact with it, so that the acid in the plate is greatly consumed, resulting in a rapid decrease in the concentration of the acid in contact with the plate, so that the battery is not capable of continuously powered by. This is the reason for the battery exhibits less capacity. Common faults and exclusion methods There are many causes of lead-acid batteries.

In addition to normal natural damage and manufacturing quality and transportation preservation, most is due to improper use of maintenance. According to the system of the investigation materials, the battery installation is scrapped half a year to 1 year; while the same batch, the unit of the same model uses a good equipment for 3 years to 4 years, which is enough to explain the maintenance work. Directly affects the battery life of the battery.

First, the active substance (PbO2 and Pb) on the normal discharge, the active substance (PbO2 and Pb) on the positive and negative electrode plates, mostly made of small crystals of sulfate sulfate. These small crystals are evenly distributed on the porous plate, and it is easy to contact the electrolyte when charging, and the chemical reaction is restored to the original neutral lead, but if maintenance is not properly managed, the primary plate The crystallization is gradually formed into a large and electrically conductive crude crystal sulfate, and even the area is large, almost insoluble in the electrolyte more solid sulfate crystal layer, attached to the surface of the plate, resulting in a plate hardening. This crystallization conductivity is poor, the volume is large, the micropores of the plate plate, hinders the penetration of the electrolyte, adding a plate resistance, and it is difficult to recover it in the future, which makes it restored to the primary board.

Reduced active substances, reduced capacity, and damage to reverse use when severe. This is the so-called plate sulfate. Second, the polar bending and breaking under normal conditions, as the battery usage time is increased, the polar plate is slightly expanded or contracted, which is a normal phenomenon.

However, if expansion, excessive contraction, and the polar use of each part of the plate itself, the phenomenon of polar bending and break occurs, resulting in a polarized local active material to fall off, and the battery capacity is lowered, even the plate four corner, due to pressure Overmount, damage the separator, cause positive, negative plate short circuit. Causes of polar bending and fracture: 1, polar plate manufacturing quality is not good 2, often excessive discharge 3, high current charge 4, high temperature discharge plate bending and breaking treatment: Open the battery cover, take out the pole group, bend The plate is flat, and the fracture plate is soldered. Third, the excess shedding battery tank of the polar active substance has accumulated a large amount of precipitates in a short time in a short period of time, the capacity decreases, the temperature rise is high, the electrolytic solution is turbid, and the gas is large.

This is an important feature of excessive falling of polar active substances. Causes of excessive shedding of polar active substances 1 Short-circuit five, the reactionary battery of the battery is in multiple series in series, if there is a certain battery capacity, even completely lost capacity, then in the discharge process, it quickly finished its own capacity. The battery not only does not continue to discharge, but also because its end voltage is lower than the end voltage of other batteries, so that its polar, negative polarity reversal.

Reasons for inverse failures: The important cause of the opposite fault is due to insufficient charge after excessive discharge, or the initial charging is not sufficient and causes a plate sulfate, or there is a short-circuit fault between the pla.

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