DanTerp
New Member
Greetings!
I really would appreciate any insight regarding my project. I want to perform a form of electrochemical impedance spectroscopy on consumer electronic batteries (ie. measure the impedance of a battery - real and imaginary). Basically I want to create a device which is capable of doing one of two things:
(battery under test on the left, black box right)
The batteries I'll use are Li-ion (3.6V single cell - 4.2V fully charged). My target peak-peak current of 1) would be ~100mA. My target peak-peak voltage of 2) would be 25mV. Remember I only need to achieve one of these. I also want to be able to vary the frequency over a very small range (ideally 10Hz - 0.1Hz).
The ideas I've had so far are:
If you have any advice I would be grateful.
I really would appreciate any insight regarding my project. I want to perform a form of electrochemical impedance spectroscopy on consumer electronic batteries (ie. measure the impedance of a battery - real and imaginary). Basically I want to create a device which is capable of doing one of two things:
- Draw current from a battery in a sinusoidal manner
- Draw current from a battery in such a way that causes the voltage of that battery to vary sinusoidally
(battery under test on the left, black box right)
The ideas I've had so far are:
- Use a digital rheostat (ie. constantly change the resistance value)
- Use a fixed resistor with a wienbridge oscillator as a reference voltage
If you have any advice I would be grateful.