Chapter 5 battery
A says battery polarity must be observed when connecting the battery cables B says the batteries must be secured in the vehicle to prevent internal damage and the possibility of shorting across the terminals if it tips
Both
Battery terminology is being discussed. Tech A says grid growth is a condition where the grid grows a little metallic fingers that extend through the separators and short out the plates Tech B says deep cycling is discharging the battery almost completely before recharging it
Both
Tech A says the largest demand on the battery is when it must supply current to operate the starter motor Tech B says the current requirements of a starter motor may be over 100 amps
Both
The current capacity rating of the battery is being discussed. Tech A says the amount of electrical energy that a battery is capable of producing depends on size weight and active area of plates Tech B says the current capacity rating of the battery depends on the types of materials used in construction of the battery
Both
The hybrid battery is being discussed A says the hybrid battery can withstand at least 6 deep cycles and still retain 100 percent of original reserve capacity Tech B says the grid construction of the hybrid battery consists of approximately 2.75% antimony alloy on the positive plates and a calcium alloy on the negative plates
Both
Charging voltage must exceed battery voltage to overcome
CEMF (counter voltage)
Positive plates, negative plates assembled with porous separators
Cell
How do you convert CA to CCA?
Divide CA by 1.25
Cranking Amps
The battery's ability to provide a cranking amperage at 32 degrees Fahrenheit.
An electrochemical device for converting chemical energy into electrical energy
Battery
A 40/60% mixture of sulfuric acid to water
1.260 electrolyte
Two twelve volt batteries connected in parallel has a potential voltage of
12 V
Reserve capacity rating
Minutes that a fully charged battery can be discharged at 25 amps before battery voltage drops below 10.5 volts
Battery rating methods being discussed. Tech A says the ampere hour is determined by the load in amperes a battery is able to deliver for 30 seconds at 0 degrees Fahrenheit without terminal voltage falling below 7.2V for a 12V Tech B says the cold cranking rating is the amount of steady current that a fully charged battery can supply for 20 hours at 80 degrees Fahrenheit without battery voltage falling below 10.5V
Neither
Which of the following statements about NiMH cells is not true?
NiMH batteries have an anode electrode that contains nickel hydroxide.
Lead peroxide (lead dioxide)
Positive plate
Cells of an automotive battery are connected in
Series
The grids in a battery
Serve as a framework for the battery's active materials
Ampere-hour rating
The amount of steady current that a fully charged battery can supply for 20 hours at 80 degrees Fahrenheit without the terminal voltage falling below 10.5 volts Not widely used method
Cold Cranking Amps
The load (in amperes) that a battery is able to deliver for 30 seconds at 0 degrees Fahrenheit without terminal voltage falling below 7.2V (1.2V per cell) Sometimes as high as 1100CCA
Sulfation may be caused by
Undercharging
In a discharged battery, the electrolyte turns to
Water
