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Service Life Of Lead-acid Battery

Jul 31, 2017

Lead-acid battery is mainly composed of battery trough, battery cover, positive and negative plate, dilute sulfuric acid electrolyte, clapboard and accessory.

Ordinary batteries, also known as lead-acid batteries, whose electrodes are composed of lead and lead oxides, the electrolyte is sulfuric acid aqueous solution. The main advantages are voltage stability, cheap price; The disadvantage is that the energy is lower than the energy (that is, the battery storage per kilogram), Standard Lead Acid Battery the service life is short and the daily maintenance is frequent. Old-fashioned ordinary batteries typically live for about 2 years, and periodically check the height of the electrolyte and add distilled water. However, with the development of science and technology, the life of ordinary battery has become longer and the maintenance is simpler.

The most obvious feature of a lead-acid battery is that there are 6 plastic seals on top of which can be unscrewed, with vents on them. These seals are used to raise, Standard Lead Acid Battery check electrolyte and discharge gases. In theory, lead-acid batteries need to check the height of the electrolyte at each maintenance, and if there is a shortage of distilled water. However, with the upgrading of battery manufacturing technology, the maintenance of lead-acid batteries is no longer complicated. Normal use, 2-3-year lead-acid batteries need not add electrolyte or distilled water. In other words, for the general owner, if you do not have a special maintenance of lead-acid batteries, Standard Lead Acid Battery it can also work 2-3 years of normal life, basic also do not lose maintenance batteries.

Of course, if you want to play the limit of battery, prolong the service life, you can check the electrolyte surface height every 10,000 kilometers or so, so that it always stays in the middle position. Standard Lead Acid Battery If properly maintained, lead-acid battery life can be extended from 2-3 years to 4 years or even 5 years. However, most of the 4S stores do not add electrolyte service, the owner of a friend can only find the repair shop to complete the operation.

Basic structure of lead-acid battery:

Positive and negative plates (1)

Lead-acid battery plate, according to the structure and active material into the method, can be divided into four categories: paste-type plate, tubular plate, Standard Lead Acid Battery the formation of the plate, half of the plate.

The Paste-type plate (coated plate) is composed of a grid and active material.

The function of the grid is to support active material and conduction current, and to distribute the current evenly.

The material of the grating is usually leaded antimony alloy, and the lead-calcium alloy is used in the maintenance-free battery.

The main components of positive active substance are lead dioxide, and the main constituents of negative active substance are velvet lead.

Clapboard (2)

The battery separator is made of microporous rubber, Standard Lead Acid Battery pigment glass fiber and other materials, its main function is:

Prevent the positive and negative plate short circuit.

The negative ions in the electrolyte are successfully passed.

The inhibition of the active material of the positive and negative plates prevents the positive and negative plates from being damaged by vibration.

Therefore, the need for clapboard with high porosity, small aperture, acid-resistant, do not secrete harmful impurities, there is a certain strength, in the electrolyte small resistance, Standard Lead Acid Battery chemical stability characteristics.

Electrolyte (3)

Electrolyte is an important part of accumulator, which is conductive current and participates in electrochemical reaction.

The electrolyte is made of concentrated sulfuric acid and purified water (deionized water), and the purity and density of electrolyte have an important effect on battery capacity and life.

The electrolyte density of automotive lead-acid battery is 1.280±0.005G/CM3 (25 ℃) dilute sulfuric acid.

Battery housings and Caps (4)

The battery shell and lid are containers of positive, negative and electrolyte, usually made of plastic and rubber materials.

Exhaust plugs (5)

It is usually made of plastic material, which seals the battery, Standard Lead Acid Battery prevents the air from entering and prevents the plate from oxidizing. At the same time can be charged when the gas produced in the battery out of the battery, to avoid the danger of battery.

Before use: The blind hole in the exhaust plug must be pierced with wire to ensure that the gas overflow is unobstructed.


In addition to the above-mentioned parts of the battery, there are chain (6), Pole (7), saddle (8), liquid surface indicator and other components.