Hi all, I have built a simple charge regulator for my 1.2V NiMH battery. I am using 6V solar panel to charge the battery. Without charge regulator, the charging current is up to 70mA but there is only up to 3mA if connected with charge regulator. Hope someone could help.
The charge regulator can provide a stable output voltage of 1.44V. When the voltage at W1 (the voltage across emitter and base of Q2 + voltage across D3) reaches 1.3V, Q2 conducts and shut the Q1 down that stops charging.
The charge regulator can provide a stable output voltage of 1.44V. When the voltage at W1 (the voltage across emitter and base of Q2 + voltage across D3) reaches 1.3V, Q2 conducts and shut the Q1 down that stops charging.
Yes, as the temperature goes up, Q2 will conduct earlier to stop the charging current.
I just want to know is there any possible to achieve the ability that I described before with not much modification on the circuit ?
Yes, as the temperature goes up, Q2 will conduct earlier to stop the charging current.
I just want to know is there any possible to achieve the ability that I described before with not much modification on the circuit ?
Hi,
You said that you wanted to reduce the charge current close to zero when the battery voltage was ~ 1.44V.
The values you have posted indicate thats what the circuit isdoing.???