With the need to charge the battery, car owners meet often enough. This process has its own characteristics and it must be carried out according to certain rules, on the observance of which depends the longevity of the car battery and its normal functioning.
The car battery is charged using a DC power source. It is possible to use any rectifiers with which you can perform voltage or current adjustment.
One way to charge car batteries is to charge the battery with a constant current. When using this method, the charging current must not exceed 0.12 of the nominal capacity of the battery. At the same time, it is mandatory to use a regulating device that will maintain the constant current for the entire time of charging the battery. Sign of the completion of the process will be a constant density of electrolyte, which persists for 3 hours, as well as the stability of the current and voltage charge for 1-2 hours.
Another way to charge a battery is by charging with a constant voltage. A prerequisite for using this method is constant voltage support at a level of 2.2 to 2.25 V per each bank (for the whole battery this will be a range of 13.2 - 14.1 V). Note that it may take several days to fully charge the battery in this way.
As the battery is charged, the voltage at its terminals smoothly approaches the voltage that is created by the charger. At the same time, the value of the charging current on the contrary decreases and approaches zero, which allows charging the battery in automatic mode. The sign of the completion of charging will be the constant density of the electrolyte.
The disadvantage of this method is the need to monitor the charging current and the abundant release of gases at the end of charging. In order to prevent this phenomenon, a gradual decrease in the amperage and an increase in the charging voltage is used.
Charge the charger
Chargers for car battery are divided into 2 classes:
- The first class includes transformer models with a cumbersome transformer, which is included in one circuit with a rectifier. These chargers have a high power, are sufficiently reliable, their components are manufactured using modern technologies.
- The second class includes impulse chargers. In such models a high-frequency transformer is built in, which has not large dimensions and weight. The number of models of this class is growing rapidly today. Their popularity is mainly due to the affordable price, which is possible because of the use of cheap materials. However, the reliability of such chargers is lower than that of transformer models.