How do lead batteries (rechargeable) supply both AC and DC power?

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In summary, lead batteries are commonly used in cars and they supply DC power. To convert this into AC power, an inverter is needed. An inverter works by switching the fixed polarity of battery energy to produce a sinusoidal waveform. The fact that some batteries are rechargeable does not affect this process.
  • #1
khurram usman
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lead battery(rechargeable)...?

i was just wondering that the common lead batteries (the ones used in cars) supply us AC or DC? i saw a battery attached to a UPS and it steps up the 12V to 240V. so what i concluded was that it must give us AC. but how does it supply AC? i mean its positive and negative terminals are fixed. also i remember reading somewhere that they supply us DC. please explain.
 
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All batteries supply DC. To turn it into AC you need an inverter.
 
  • #3


russ_watters said:
All batteries supply DC. To turn it into AC you need an inverter.

ok...how does an inverter work?
 
  • #5


Great link Borek :smile:
 
  • #6


Batteries produce voltage and current in a fixed direction due to chemcial reactions. So one terminal of a battery is positive and the other negative as electrons and ions from chemical activity move between the terminals.

An inverter takes the fixed polarity battery energy (power) and switches it from positive to negative (a square wave is a simple result) via electrical components while more sophisticated electronic oscillators not only switch from positive to negative but also produce a sinusoidal waveform...like that from commercial power.

More here:
http://en.wikipedia.org/wiki/Electrical_inverter#Circuit_description

It makes no difference that some batteries are rechargable...all that means is that the chemical processes can be reversed by application of external power which restores (most of) the battery chemical composition.
 

Related to How do lead batteries (rechargeable) supply both AC and DC power?

1. What is a lead battery (rechargeable)?

A lead battery, also known as a lead-acid battery, is a type of rechargeable battery that uses lead plates and sulfuric acid as the electrolyte to store and release energy. It is commonly used in automobiles, uninterruptible power supplies, and other applications that require a reliable and long-lasting power source.

2. How does a lead battery (rechargeable) work?

A lead battery works by converting chemical energy into electrical energy through a process called electrochemical reaction. When the battery is charged, the lead plates are coated with lead oxide and lead sulfate, and sulfuric acid is converted to water. When the battery is discharged, the lead sulfate is converted back to lead and lead oxide, and the water is converted back to sulfuric acid.

3. What are the advantages of using a lead battery (rechargeable)?

Lead batteries have several advantages, including their low cost, high energy density, and ability to provide high surge currents. They are also relatively resistant to overcharging and can operate in a wide range of temperatures. Additionally, lead batteries are recyclable, making them an environmentally friendly option.

4. How long does a lead battery (rechargeable) last?

The lifespan of a lead battery depends on several factors, including its size, usage, and maintenance. On average, a lead battery can last for 3-5 years, but with proper care, it can last up to 10 years. Regular charging and avoiding deep discharges can help prolong the battery's life.

5. What are the safety precautions for handling a lead battery (rechargeable)?

Lead batteries contain sulfuric acid, which can be corrosive and cause burns if it comes in contact with skin or eyes. It is essential to wear protective gear, such as gloves and goggles, when handling lead batteries. It is also crucial to handle them in a well-ventilated area and avoid overcharging or short-circuiting the battery to prevent potential hazards. Proper disposal of lead batteries is also necessary to prevent environmental contamination.

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