Witam. Jeśli mógłby ktoś sprawdzić napisany przeze mnie 'referat,dot. ładowarek, byłbym niezmiernie dźwięczny..
In my presentation I would like to tell (you?) about device, which is battery charger.
Battery charger- a device used to make electricity to the electric battery by forcing electric current through the battery in the opposite direction to the SEM battery. Mileage and charging parameters depends on the type of battery, its capacity and performance. Loading conditions are specified by the manufacturer indicating the maximum battery charging current, the maximal electric charge or current and charge time, and sometimes other conditions, such as the maximum voltage, temperature. Therefore, manufacturers of chargers determines what types of the batteries can be charged by particular charger .
Types of battery chargers:
Simple
It's basically a non-stabilized or stabilized DC (Direct Current) power supply. A simple charger works by connecting current source with voltage greater than the electromotive force of the battery to rechargeable battery, charger's resistance limits the charging current. In that chargers, the cell is charging by current at a value dependent on the characteristics of the battery charging voltage and charger's resistance. The simple design makes the charger is cheap. These chargers require interruption of the charging process after a certain time, leave the battery for a long time causes overcharging of the battery and may damage. Therefore, these chargers are so selected values of the charging current to minimize the risk of overloading. For this reason, charging to the full charge by simple charger, takes longer, that chargers with changing in time characteristic charging current.
The time limitation
An improved version of simple chargers are chargers with limited time. They have a system which measures the load time (the timer), and interrupts the charging after this time.
Intelligent
The maximum battery charging current depends on the state of charge. "Intelligent" charger monitors the voltage, temperature and charging time. Based on these parameters, determines the optimal charging current at the moment. Charging is over, when the based on voltage, temperature and charging time, the system concludes that the battery is fully charged.
Quick
Uses the battery control circuit in the process of charging for rapid charging without damaging the internal components. Most of these chargers have installed the cooling fan, to keep the temperature of rechargeable batteries under control.
USB
The USB port provides the ability to power supplying devices, connected by voltage about 5V. This possibility is also used to power supply devices, that do not use the USB port, but connected to the computer only for their power supply, including battery chargers.
I hope that my presentation outlined the way of action in a quick and comprehensive way. Thank you for listening and have a nice day.
edytowany przez miryn: 04 cze 2012