Grid and Plate Construction

Grid and Plate Construction

PROBE Maintenance Free Batteries are designed with the best grid / pasting technology currently existing with the expanded lead calcium grid having many advantages over other grid technologies.

The Main Benefits Are:

  • High resistance to corrosion due to a fine surface grain.
  • No presence of cranked nodes in the grid
  • Reduced electrical resistance i.e. a better energy output
  • Minimal water consumption during service life.

Each cell within a PROBE MF PREMIUM battery consists of:

  • A grid structure laminated from lead calcium alloy and with centered reinforced lugs for better electrical performance and higher vibration resistance.
  • Plates with a special pasting composition, using the finest available lead oxide process and world wide recognized expanders for best cold cranking performance.
  • Microporous polyethylene separators (with glass mat for PROBE MF Heavy Duty Range).
  • Electrolyte used in the cell composed of high purity deionized water mixed with high quality grade sulfuric acid.



The PROBE MF PREMIUM battery uses lead calcium grid technology which gives greater strength and higher resistance to corrosion than other grid technologies assuring extended life and increased electrical energy input /output battery rate.

The grids are an important constituent part of the battery because corrosion takes place primarily at the positive grid, with the process being more pronounced in batteries that experience overcharging and/or operate at temperatures above 35°C.

Lead Calcium Laminated Grid made of Higher Resistance Corrosion Lead Alloy with better electrical conductivity.



The plates are the cells main reactive components with a mud-like material pasted on the grid. This mud like material is composed of lead oxide, sulfuric acid, water, fiber strips and the negative plate composition also contains expanders agents to prevent the hardened paste from shrinking and reverting to a dense inactive state.

The plates are immersed in electrolyte solution within each battery cell and given a forming charge, during which process electrochemical reactions take place in the plates converting the lead oxide on the positive plate to lead dioxide, and converting the lead oxide on the negative plate to sponge lead.


Element Cell

Each cell in a battery contains a plate group, called element. An element consists of a designed number of positive and negative plates, both plates insulated by the separators. These prevent the plates from touching and causing a short circuit.

Separators are a nonconductive, microporous materials that has the function to prevent the short circuit while allowing a good electrolyte diffusion between the plates.
The most important property of the separator is the electrical resistance, which is directly related to the cranking capability of the battery.
The main factors that determine the separator resistance are the microporosity and the raw materials used in the separator production processes.

The polyethylene separator meets the requirements for high microporosity and lower electrical resistance as well, so that for major battery manufacturers it is the best choice to provide high cranking power performance, which is one of the features of the PROBE MF PREMIUM Battery

The number of plates in each element determine the battery electrical performance.
Increasing the number or size of the plates increases the overall plate surface area, exposes more reactive lead to the electrolyte, increasing the discharge capacity and the electrical current available during a cranking discharge.

Each cell , consisting of one element, has an open circuit voltage of about 2,13 volts, and in a 12 volts battery there are six cells connected in series for a total open circuit battery voltage of approximately 12,80 volts.

The intercellular connections between the cells are made using through partition connectors, welded by a process called extrusion-fusion process.


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