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The failure reasons of electric sweeper starting batteries

Date:2015-01-29

                                              

 

      

 

       

Electric sweeper battery is plate grid corrosion is inevitable, but now the electric sweeper battery destructive of the positive grid corrosion, major is not caused by normal charging and discharging, but caused by electro-hydraulic stratification. First discharge process, the electrolyte has a hierarchical trend gradually, the lower part of the battery electric liquid density is higher and higher, the density of the upper lower. Eliminate electro-hydraulic stratified charging on the structure of the old battery can only be used to stir the bubble electro-hydraulic. Electric sweeper battery has a molten slag at the bottom of the tank, the charging all happened on the plate, the bubble in the plate high concentrations of acid slag groove under the bubble is stirring. Sulfuric acid electric liquid viscosity is bigger, the high concentration in the trough and upward diffusion power low concentration area is small, the mixing corner store high concentration is increased the positive grid corrosion of bottom border. This is just a chemical etching, and electrochemical corrosion is more serious.

The commissioning of the new battery, battery electrolyte injection density value is based on the principles of low freezing point selection. The so-called low freezing point, essence is the biggest dissociation degree of electrolyte. After the electro-hydraulic stratification, lower density is greater than the upper, and the lower battery electric hydraulic conductivity is greater than the upper, when charging, the lower pole grating surface current density is greater than the upper, and the electrochemical corrosion and the charging process than a single chemical etching is much more strongly. Due to the negative plate gate not corrode when charging, are exempted from the electrochemical corrosion, so usually battery negative plate gate is greater than the life of a positive plate gate. Due to the positive plate gate is "bite edge" in the form of a bottom-up has been continuous corrosion, make the positive plate gate is always lower severely damaged, even large area hamstring, fell off the plate with the damaged plate gate.

 


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