What Is The Electrolyte Material Of Lead-acid Battery?

News 2023年2月20日 114

The electrolyte of lead acid battery is expressed by H2SO4, which is used for electrochemical reaction with positive active substance and negative active substance. It can also form ionic conductive circuit in charging and discharging process. In the interior of lead acid battery, the electrolyte absorbs electrolyte in positive and negative porous structure, which is conducive to chemical reaction.

There are mainly two kinds of electrolytic solutions used in lead-acid batteries. One is dilute sulfuric acid, which is simple in process and low in cost. The density of sulfuric acid electrolyte is 1.28g/cm3 sulfuric acid and appropriate sodium sulfate and other additives.

Lead Acid Battery Introduction
Lead Acid Battery Introduction

The electrolyte is introduced by the following description:

1.Electrolyte conduction

The battery is connected to the external line, the current from the battery positive electrode into the battery negative by the external line, there is a current flow on the external circuit, and in the battery internal HSO4- ions leave the negative electrode to the positive migration, H+ is left the positive electrode to the negative migration, so that the battery internal due to the directional movement of ions, the formation of current. In this way, the reactant PbSO4 on the negative electrode gets electrons from the outer circuit and releases HSO4- into the electrolyte, and HSO4- migrates back to the surface of the positive electrode, completing the transfer and transfer of charge.

2.Electrolyte resistance coefficient

The resistivity of electrolyte is temperature dependent. When the temperature rises, the viscosity becomes smaller, the ion migration is small, the movement is active, and the resistance coefficient will become smaller.

3. Determination of solution density

The determination of electrolyte density is mainly based on ensuring that the electrolyte is in the range of active concentration. The selection of electrolyte density should be considered from the battery body structure, power supply characteristics, working environment and so on. The experimental results show that the ideal density range of electrolyte is 5.0mol/L(D=1.280) to 1.5mol/L(D=1.100).

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