Battery Flashcards
What do batteries do?
Batteries store chemical energy and convert it into electrical energy to power devices.
How do a batteries work?
A battery converts chemical energy into electrical energy via electrochemical reactions between its electrodes and electrolyte.
What are the common types of batteries?
Alkaline, lithium-ion, nickel-cadmium (NiCd), and nickel-metal hydride (NiMH).
What are the typical voltage ranges for AA batteries?
Typically 1.5V for alkaline and 1.2V for NiMH rechargeable batteries.
How do you use batteries in a circuit?
Connect the positive terminal to the positive side of the circuit and the negative terminal to the negative side.
What can go wrong with batteries in a circuit?
They can leak, corrode, or overheat, potentially causing damage or unsafe conditions.
What is the difference between primary and secondary batteries?
Primary batteries are single-use (non-rechargeable), while secondary batteries are rechargeable.
How can battery life be extended?
Avoid overcharging, use the battery within its temperature range, and store it properly when not in use.
What safety precautions should be taken with batteries?
Avoid short-circuiting, puncturing, or exposing them to extreme temperatures.
What are primary batteries?
Non-rechargeable batteries designed for single-use.
What are secondary batteries?
Rechargeable batteries designed for multiple uses.
What is battery capacity and how is it measured?
The amount of charge a battery can store, measured in milliampere-hours (mAh).
What are common types of batteries?
Alkaline, lithium-ion, nickel-cadmium (NiCd), nickel-metal hydride (NiMH).
What is the voltage of a standard AA alkaline battery?
1.5V.
What is the voltage of a standard AA NiMH rechargeable battery?
1.2V.
How should batteries be stored?
In a cool, dry place and away from direct sunlight or extreme temperatures.
What is a battery’s self-discharge rate?
The rate at which a battery loses charge when not in use.
How can you extend battery life?
Avoid overcharging, store properly, and use within recommended temperature ranges.
What is battery impedance?
The resistance a battery offers to the flow of current.
How do you determine if a battery is dead?
Measure its voltage with a multimeter or check if it fails to power a device.
What are the effects of overcharging a battery?
Can lead to overheating, leakage, or even explosion.
What is a battery’s nominal voltage?
The standard voltage of a fully charged battery.
How do you safely dispose of batteries?
Follow local regulations for recycling or disposal, especially for rechargeable and lithium batteries.
What is the difference between cylindrical and prismatic batteries?
Cylindrical batteries have a round shape, while prismatic batteries are rectangular.
What is the role of a battery management system (BMS)?
To monitor and manage the performance, safety, and longevity of a battery pack.
What can cause a battery to fail prematurely?
Factors like overcharging, deep discharging, or exposure to extreme temperatures.
How does temperature affect battery performance?
Extreme temperatures can reduce capacity and shorten lifespan.
What are lithium-ion batteries known for?
High energy density, low self-discharge, and rechargeable capabilities.
What is a battery’s shelf life?
The time a battery can be stored before it starts to lose its charge or degrade.
What is the purpose of a battery’s positive and negative terminals?
To provide the connection points for electrical flow to and from the battery.
How do you handle leaking batteries?
Wear gloves, avoid contact with the leaked material, and dispose of the battery properly.
What is the typical capacity range for AA batteries?
Between 1000mAh and 3000mAh.
What is a battery’s discharge rate?
The rate at which a battery releases its stored energy, often measured in amps.
How does a battery’s internal resistance affect performance?
Higher internal resistance reduces efficiency and can lead to heat generation.
What is a battery’s cycle life?
The number of charge and discharge cycles a battery can undergo before its capacity significantly degrades.
