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Lead acid battery basic knowledge

- Nov 19, 2018-

Battery: An electrochemical device that provides DC electrical energy through a chemical reaction

A battery is a device for energy conversion and storage. It converts chemical or physical energy into electrical energy mainly through chemical reactions. It consists of two components of electrochemically active electrodes that make up the positive and negative electrodes. The two electrodes are immersed in an electrolyte that provides media conduction. When connected to an external carrier, it provides electrical energy by converting its internal chemical energy. .

Solar cell: A device that converts optoelectronics directly into electrical energy through photoelectric or optical effects.

The battery consists of a casing, a positive electrode, a negative electrode, a terminal, a diaphragm, and the like.

Housing: generally plastic or metal

Positive pole: the outflow end of the current

Negative electrode: the inflow end of the current

Terminal: internal connected to active material, external electrical appliance

Diaphragm: prevents short circuit between positive and negative, and provides internal internal transmission channel

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Lead-acid batteries:

A lead-acid battery, also known as a lead battery, is a type of battery, the electrode is mainly made of lead and its oxide, and the electrolyte is a battery of a sulfuric acid solution. In the state of charge, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead. In the discharge state, the main components of the positive and negative electrodes are lead sulfate. Generally divided into open type battery and valve control type battery. The owing requires regular acid injection maintenance, the latter being a maintenance-free battery. According to the battery model, it can be divided into small dense, medium dense and large dense. The main advantages are undetermined voltage, low price and so on.


The lead-acid battery refers to a secondary battery in which the positive and negative active materials are lead and lead dioxide, respectively, and an aqueous solution of sulfuric acid is used.


It is divided into two categories: rich liquid type and lean liquid type. The lean liquid type is a valve-regulated sealed lead-acid battery which is widely used at present, and in fact it is not completely sealed.


Mainly used in transportation, communications, backup power and other fields.

Has a low price. High reliability and easy maintenance.

Because lead is harmful to humans, sulfuric acid pollutes the environment, and corrodes equipment, applications are limited。

Although it has been replaced by nickel-metal hydride, lithium-ion batteries, etc。, it will occupy most of the secondary battery market for a long time due to price, safety and reliability。

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