How to Charge a 12V Battery With a DC Motor
A lead-acid battery is a source of direct-current (DC) electricity. When the battery begins to lose its charge, it must be recharged with another DC source. An electric motor, though, is as an alternating-current (AC) source. For the electric motor to provide DC energy, its output has to pass through an electronic circuit called a rectifier. An electric motor can be used in conjunction with a source of mechanical energy and a rectifier to recharge a 12V battery.
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Things You'll Need
- Brushless 12V DC electric motor
- One 12V battery
- Rectifier pack
- Adjustable wrench
- Two battery terminals
- Electrical wire
- Electrical pliers
- Soldering iron
- Electronic (rosin core) solder
Instructions
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1
Cut four lengths of wire, and strip 1/2 inch of insulation from the ends of each wire. Using the wrench, loosen the top bolts on both battery terminal connectors.
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2
Insert one end of the first wire into the space created by loosening the top bolts on the first battery terminal. Tighten the top bolts on the first battery terminal. Solder the wire to the terminal.
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3
Insert one end of the second wire into the space created by loosening the top bolts on the second battery terminal. Tighten the top bolts on the second battery terminal. Solder the wire to the terminal.
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4
Attach the free end of the first wire to the positive or "+" terminal on the rectifier pack, and solder the connection. Attach the free end of the second wire to the negative or "-" terminal on the rectifier pack, and solder the wire to the terminal.
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5
Attach the battery terminal at the end of the first wire to the positive battery post. Attach the battery terminal at the end of the second wire to the negative battery post.
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6
Attach one end of the third wire to one of the motor terminals, and solder the connection. Attach one end of the fourth wire to the remaining motor terminal, and solder the connection.
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7
Attach the free end of the third wire to one of the "AC" terminals on the rectifier pack, and solder the connection. Attach the free end of the fourth wire to the other "AC" terminal on the rectifier pack. Turn the rotor shaft on the motor to charge the battery.
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Tips & Warnings
Use this circuit in conjunction with an automatic source of mechanical power, such as an engine, to minimize battery charge time.
References
- Photo Credit motor.jpg image by Aussiebloke from Fotolia.com
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Comments
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we use a diode on the place of ractifier pack(because its inexpensive).but i dont know of what power diode i use.becausei have problem with my 12 volt dc generator to charge batteries.i have a 12volt dc motor use to turn lights on but when i connect it to battery(to recharge the battery,the motor starts running) i want a method to control this because it dont charge the battery, it(motor)starts consuming it.can i need any transformer or capacitors etc.help me frist. Additional Details of which voltage doide i use( i have 12volt output)of which type i use.
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P.r. Downs
Jan 29, 2011
Technically true, but since these articles are geared for someone with no experience whatsoever, it's appropriate that he covered all the bases. It's better that he put the rectifier in. -
silverflowerx
Jan 11, 2011
- An DC motor with split brushes (most common) generates DC when rotated, there is no need to rectify, just to be careful on polarity. If you are unsure about rotation sense or not have a V-meter, only then the rectifier is justified.
