Automotive Batteries - CTE-Automotive Technology

Automotive Batteries Chapter 29 Basic Battery Principles Batteries only store power,

they do not create it. Batteries provide power for starting. Batteries supply power when demand is greater that alternator output. Batteries stabilize system voltage. Basic Battery Terms Battery - A device that stores electricity Battery Cell - Consists of Negative & Positive

plates Battery Cycling - Repeated charging and discharging events Battery Plates - Are made of lead and lead oxide Charging - Current flowing into the battery from the charging system Discharging - Current flowing out of the battery

Basic Battery Terms Electrolyte is a mixture of sulfuric acid and water. Anytime water is needed distilled water should be used.

Battery Construction A battery cell is made up of positive plates, negative plates, straps, and separators. Each cell supplies 2.10 volts DC Battery Construction The

battery case is made of high-quality plastic, which holds the elements and electrolyte. Battery Construction Distilled water is

used in batteries because it dose not contain impurities found in tap water. Battery Cables The battery positive cable is normally a

large red cable connected to the battery. Battery Configurations Batteries come in different voltages for different applications (# of cells x 2.1Volts) 6 Volt 3 cells

8 Volt 4 cells Actually 6.3 volts old cars and tractors Actually 8.4 volts

golf carts and floor machines 12 Volt 6 cells Actually 12.6 volts modern vehicles

Electrolyte Battery electrolyte is a mixture of 25% sulfuric acid and distilled water. Battery Products An

automotive battery produces: Voltage Direct Current Hydrogen gas CAUTION! Hydrogen gas is EXPLOSIVE!

Temperature As battery temperature drops, battery power is reduced 700 600 500 400

CCA 300 200 100 0 32 F

45 F 75 F 100 F Parasitic Load A

parasitic load is any circuit current draw present when all electrical devices are shut off Maintenance Free Battery A maintenance free battery does not have removable filler caps, it is sealed.

Modern Vehicles Most modern vehicles use a 12.6 volt batteries Hybrid vehicles use 144-270 volt batteries! Porsche Cayenne Toyota Highlander

Last Two Questions? Look back through the power point to find your missing answers! Want Additional Information? Visit

the web site below Car Battery Myths & Facts THE END

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