Hello guys! I'm Laurentiu and I'm new to this board and to the fine art of battery desulfation.
To start, I bought a desulfator kit and I assembled it. It works perfectly as the led lights up, the board buzzes and a nice peak is seen with a scope. The candidates are some of my old age/abused starter batteries.
Anyway, all of them are sealed so I can't measure SG. I must rely only on the peak pulse voltage and max charging voltage in order to check the desufation process.
For peak pulse voltage measurement I used a simple circuit made from a capacitor and a small signal diode. They are connected the right way since the voltage on my digital voltmeter generally matches the voltage given by a scope. I attached the peak detector directly to the battery poles with 2 thin litz wires. The problem is that the peak voltage changes widely with the physical position of the circuit. For example, the peak meter shows about 25,5V when placed parallel to the battery, with the wires straight and voltmeter leads perpedicular to the detector wires. This seems the most accurate measurement as it matches the scope values. If I angle the wires, the voltage rises. If I touch the wires or I twist them one or two times, the voltage rises to almost 35V. I know we're talking about induction currents here, but how should I arrange the peak meter wires? Now I can't take even two consecutive matching measurements, they vary too much, the detector is useless in the current form.
Please help!
Thank you.
To start, I bought a desulfator kit and I assembled it. It works perfectly as the led lights up, the board buzzes and a nice peak is seen with a scope. The candidates are some of my old age/abused starter batteries.
Anyway, all of them are sealed so I can't measure SG. I must rely only on the peak pulse voltage and max charging voltage in order to check the desufation process.
For peak pulse voltage measurement I used a simple circuit made from a capacitor and a small signal diode. They are connected the right way since the voltage on my digital voltmeter generally matches the voltage given by a scope. I attached the peak detector directly to the battery poles with 2 thin litz wires. The problem is that the peak voltage changes widely with the physical position of the circuit. For example, the peak meter shows about 25,5V when placed parallel to the battery, with the wires straight and voltmeter leads perpedicular to the detector wires. This seems the most accurate measurement as it matches the scope values. If I angle the wires, the voltage rises. If I touch the wires or I twist them one or two times, the voltage rises to almost 35V. I know we're talking about induction currents here, but how should I arrange the peak meter wires? Now I can't take even two consecutive matching measurements, they vary too much, the detector is useless in the current form.
Please help!
Thank you.
and not charging it on time).
