PE battery separator

In an acidic environment, the PE separator will accelerate its own aging as the temperature rises. After use, the PE separator has different degrees of grid indentation on the contact surface of the front plate. It is obvious that all parts of the separator are oxidized and damaged. It exists in the direction of the indentation, and the direction in which the separator is embrittled and falls off to form holes is the direction of the grid. The microstructure of the PE separator changed significantly before and after oxidation, and a large number of lead sulfate particles adhered to the inside and outside of the oxidized PE separator; the oxidation of the PE separator usually occurred in the direction of the positive plate, because the positive plate was charged during the charging process. During the process, the temperature of the electrode plate is continuously increased, and the temperature of the solution is also continuously increased.

At the same time, due to the increasing volume of the active material of the positive plate, the texture of the extruded separator is relatively soft. Except for the rib part, the rest part is in direct contact with the positive plate, so that the heat of the plate cannot be transferred to the solution and the environment in time. It is exchanged and directly transferred to the PE separator; at the end of charging, due to the electrolytic water reaction, oxygen will be released on the surface of the positive plate, and when the solution temperature is high at this time, the temperature of the plate is even more so, because The addition of oxygen causes accelerated oxidation of the separator, and the extrusion of the separator by the grid causes mechanical damage to the separator, resulting in the oxidation of the battery separator and the formation of holes, resulting in battery failure.

The PE separator material itself is an insulator, but the PE separator has a loose porous structure and can absorb a large amount of electrolyte solution; the PE separator has better chemical stability, and is resistant to sulfuric acid corrosion, oxidation and aging; PE separator It should have greater mechanical strength and elasticity, and the glass fiber separator is easy to install in production. The function of the PE separator is to separate the positive and negative plates that depend on each other to prevent short circuit due to mutual contact. The separator material should have good acid resistance and oxidation resistance. PE separators are usually installed with grooves on one side, and the grooves should face the positive plate and be perpendicular to the bottom to facilitate the flow of electrolyte.

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