Regulate DC Voltage to Charge 12V Battery

AI Thread Summary
To charge a 12V battery from a variable DC voltage source ranging from 9 to 18 volts, the voltage should be set to 13.6 volts with a current limit of 3 amps. This configuration allows the battery to charge until it reaches 13.6 volts, at which point charging will stop. It is important to note that if the voltage is limited to 12 volts, the battery will not charge effectively. Manufacturers like TI, National, LTC, and Maxim offer battery charger ICs that can help in designing this circuit. Proper regulation is essential for efficient battery charging without exceeding voltage limits.
Rev_1911
Messages
1
Reaction score
0
Ok, so I have a variable DC voltage source that changes as due to outside factors. The voltage ranges between 9 and 18 volts with a current between 1 and 3 amps. I want the voltage source to charge a 12 volt battery continuously until it is full. Whent he battery is full, the circuit should shut off delivering the voltage from the voltage source to ground. The input to the battery can be below 12 volts, however, I don't want the voltage to ever reach a value larger than that. Can someone please help me?
 
Engineering news on Phys.org
You should be able to do that with just the power supply.

Set the current limit to 3 amps and the voltage to 13.6 volts.

The supply will then deliver 3 amps to the battery until it charges to 13.6 volts when it will stop charging.

Assuming the battery is lead-acid, the voltage when it is fully charged will be 13.6 volts.
 
VK6KRO is right. But to limit at to 12 volts as you originally intended the battery will never be charged.
 

Thread 'What happens if shielded cable has a short to the shield?'

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
View full post »

Thread 'Underwater piezoelectric sensor array receive sensitivity'

Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
View full post »

Thread 'Question about bonding ground and neutral'

I am not an electrical engineering student, but a lowly apprentice electrician. I learn both on the job and also take classes for my apprenticeship. I recently wired my first transformer and I understand that the neutral and ground are bonded together in the transformer or in the service. What I don't understand is, if the neutral is a current carrying conductor, which is then bonded to the ground conductor, why does current only flow back to its source and not on the ground path...
View full post »

Similar threads

The battery voltage drops when fed to the DC booster circuit
Replies
3
Views
1K
Question about the voltage between two charged capacitors
Replies
4
Views
147
Pwrng a 1064nm Diode/Laser Pointer w/Voltage Regulation
Replies
32
Views
3K
How does a voltage regulator differ from a zener diode?
Replies
38
Views
4K
Safe to charge a Lithium Battery with a Voltage Limit?
Replies
2
Views
2K
Manually charging batteries
Replies
11
Views
2K
Voltage Regulator, Battery resistance, current
Replies
4
Views
3K
12V DC Motor in Light Fixture with Dimmer & 12V DC to 110V AC Inverter
Replies
21
Views
2K
Revamp Your Motorcycle's Charging System for 12v DC: Stator Winding Help
Replies
3
Views
4K
DC input random offset voltage for diff. amplifier with current-mirror load
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top