You cannot charge Ni-MH cells with a constant voltage. You must limit the current because an extremely high current will flow when a dead cell is beginning to be charged.
Most semiconductor manufacturers have battery charging ICs.
You cannot charge Ni-MH cells with a constant voltage. You must limit the current because an extremely high current will flow when a dead cell is beginning to be charged.
You cannot charge Ni-MH cells with a constant voltage. You must limit the current because an extremely high current will flow when a dead cell is beginning to be charged.
Most semiconductor manufacturers have battery charging ICs.
You cannot use a constant voltage to charge a battery. When the battery is discharged then the charging current will be much too high.
But the solar panel limits the current so that the voltage will not be constant.
You cannot use a constant voltage to charge a battery. When the battery is discharged then the charging current will be much too high.
But the solar panel limits the current so that the voltage will not be constant.
Then how do i charge a battery? I have a Duracell NiMH charger which runs off the wall port and it says that the charging voltage and current per sortie(i.e two cells of 1.2V each) is 3V and 360mA respectively...
Your Duracell charger limits the charging current to 360mA and it limits the voltage to 3.0V. It is not "constant voltage".
When two dead cells are charged in series and have a total voltage of only 1V or less, the 360mA current charges them until the voltage rises.
The voltage is not 3.0V until both cells are nearly fully charged.
Your Duracell charger limits the charging current to 360mA and it limits the voltage to 3.0V. It is not "constant voltage".
When two dead cells are charged in series and have a total voltage of only 1V or less, the 360mA current charges them until the voltage rises.
The voltage is not 3.0V until both cells are nearly fully charged.
or just hang a charger off the sepic... the sepic will let the charger run with less than the battery voltage supplied. I did a power LED driver with one before driver chips were available. the LED ran from 2.5V to 5V... more actually but that is all i needed to say, a single lithium cell.