Operation CHARM: Car repair manuals for everyone.

Battery - Description






DESCRIPTION





A large capacity, low-maintenance storage battery is installed on this vehicle. Male post type terminals (1&7) made of soft lead protrude from the top of the molded plastic battery case to provide the means for connecting the battery to the vehicle electrical system. The battery positive terminal post (1) is physically larger in diameter than the negative terminal post (7) to ensure proper battery connection. The letters POS and NEG are also molded into the top of the battery case adjacent to their respective positive and negative terminal posts for identification confirmation.

The battery is made up of six individual cells that are connected in series. Each cell contains positively charged plate groups (10) that are connected with lead straps to the positive terminal post (1), and negatively charged plate groups (10) that are connected with lead straps to the negative terminal post (7). Each plate consists of a stiff mesh framework or grid coated with lead dioxide (positive plate) or sponge lead (negative plate). Insulators or plate separators made of a non-conductive material are inserted between the positive and negative plates to prevent them from contacting or shorting against one another. These dissimilar metal plates are submerged in a sulfuric acid and water solution called an electrolyte (9).

The battery has a built-in test indicator (hydrometer) (4). The color visible in the sight glass of the indicator will reveal the battery condition. Water cannot be added to this battery. The battery is not sealed and has vent holes (2) and (6) in the cell caps (3) and (5). The chemical composition of the metal coated plates within the low-maintenance battery reduces battery gassing and water loss, at normal charge and discharge rates. Therefore, the battery should not require additional water in normal service.