about 10mV (for Ni-Cd) and 4mV (for Ni-MH). The figure shows that at the end of the cell charging, the voltage decreases by a small amount. Specialized charge controllers for Ni-Cd and Ni-MH batteries, as a rule, work according to the so-called delta method. The graph shows how the temperature of the element (temperature), the voltage at its terminals (voltage) and the relative pressure (relative pressure) change during charging. Here is the charging characteristic of one 1.2V Ni-Cd battery cell. In the charger for the screwdriver, this mode not implemented. a block of 12 batteries must be discharged to 12 volts. If you follow the correct algorithm for charging the battery, first, each of its elements must be discharged to 1 volt. That is, the capacity of the battery decreases. This operation algorithm is primitive and eventually leads to the so-called “memory effect” of the battery.
Charging complete.Īfter charging, the voltage at the battery terminals can reach 16.8 volts. The green LED lights up and the red one goes out. After 50-60 minutes, the relay opens the battery charging circuit. The red LED lights up and the green one goes out. When the “Start” button is pressed, the electromagnetic relay closes its contacts, and the battery is connected to the output of the mains rectifier, and the battery charging process begins. When a removable battery is connected, a green LED lights up, which indicates that the charger is ready for use. When connected to a 220V network, the charger does not show its work in any way. The design of the charger from the screwdriver The algorithm of the circuit is quite simple. Electric circuit of the charger of the screwdriver Mains power supply for electric screwdriver.Voltage at the output of the screwdriver charger.Regulated Voltage Control | PCM Controlled Charging System | AnthonyJ350.The algorithm of the circuit is quite simple.The design of the charger from the screwdriver.
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