Lesson 2/Learning Event 1
FIGURE 16. CELL GROUP CONSTRUCTION.
Each plate has a lug on one top corner. Several plates are combined into positive and negative
GROUPS by welding these lugs to a plate strap, which is also made of lead. A negative group of
plates has negative plates only and a positive group positive plates only. The plate strap on each
group of plates contains a terminal post, which forms an outside electrical connection.
A positive and a negative plate group, along with several insulators called SEPARATORS, are put
together to form an ELEMENT. The thin separators are inserted between the positive and negative
plates to prevent them from touching and short-circuiting the battery internally. They are generally
made of a material, such as wood, rubber, or glass, and contain many small holes so the liquid
electrolyte can pass through.