Podcast
Questions and Answers
What is the purpose of a 12-volt battery in a vehicle?
What is the purpose of a 12-volt battery in a vehicle?
- To stabilize the electrical system (correct)
- To regulate the fuel injection system
- To power high-voltage components
- To start the engine
What happens if the auxiliary battery is discharged?
What happens if the auxiliary battery is discharged?
- The vehicle will start, but the electrical system will not function properly
- The vehicle will not start (correct)
- The vehicle will start, but the battery will need to be replaced soon
- The vehicle will still start, but with reduced power
How do lead-acid batteries work?
How do lead-acid batteries work?
- By converting sunlight into energy
- By allowing electron flow between dissimilar metals in acid (correct)
- By using a chemical reaction between copper and zinc
- By using a magnetic field to generate electricity
What is the process that occurs during discharging of a lead-acid battery?
What is the process that occurs during discharging of a lead-acid battery?
What is a conductance tester used for?
What is a conductance tester used for?
What is the recommended charging method for a battery to prevent overheating?
What is the recommended charging method for a battery to prevent overheating?
What is the reserve capacity rating of a battery used for?
What is the reserve capacity rating of a battery used for?
What is the difference between absorbed glass mat (AGM) and recombinant-type lead-acid batteries?
What is the difference between absorbed glass mat (AGM) and recombinant-type lead-acid batteries?
What does a load test determine?
What does a load test determine?
What does a terminal voltage test measure?
What does a terminal voltage test measure?
What is the scientific principle behind how batteries work?
What is the scientific principle behind how batteries work?
What must be done when working with batteries?
What must be done when working with batteries?
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Study Notes
- All vehicles, electric or hybrid, have a 12-volt battery.
- The 12-volt battery powers low-voltage components and acts as a stabilizer for the electrical system.
- The battery must be in good condition for correct vehicle operation.
- The vehicle will not start if the auxiliary battery is discharged.
- Batteries work based on a scientific principle of electron flow between dissimilar metals in acid.
- Lead-acid batteries have positive and negative plates surrounded by sulfuric acid.
- During discharging, the plates combine with sulfur and become lead sulfate.
- During charging, the sulfate returns to the electrolyte and the plates return to lead dioxide and pure lead.
- There are two types of valve-regulated lead-acid batteries: absorbed glass mat (AGM) and recombinant-type.
- Safety procedures must be followed when working with batteries.
- Voltage of a battery does not necessarily indicate its performance.
- A terminal voltage test is conducted with an open circuit and no load applied to the battery.
- Load test determines the condition of a 12-volt battery.
- Conductance tester measures how well a battery can create current.
- Conductance tester can determine CCA, state of charge, voltage, defects, and internal resistance of the battery.
- Conductance tester is not designed to accurately determine SOC or CCA rating of a new battery.
- Slow charging is recommended to prevent overheating damage to the battery.
- AGM battery requires a charger specifically designed for it.
- Battery charge time can be estimated by using the reserve capacity rating of the battery.
- Reserve capacity divided by charging rate gives the hours needed to charge the battery.
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