When the engine is running, the car is "live", andif the engine does not work, then it's just a piece of metal. The work of the gasoline engine depends largely on the battery or battery. This is especially clear in the winter when the frost is below minus 20 ° C. Therefore, the question of how to charge a car battery will be far from fun.
It is clear that it is better to discharge the batterybring, but everything happens. If the voltage at the terminals becomes below 10.5V, then the charge for the battery is vital. It must be remembered that with a deep discharge, the plates are sulfated - and the battery is out of order. Of course, when servicing it with a single charge can not do. It is also necessary to check the density of the electrolyte, but the article deals only with how to charge a car battery.
Make it possible from a permanent sourcevoltage, and for a 12-volt battery, the voltage from the source is about 16.5V. Of course, it is best to use a special device, especially since special algorithms are now being laid in them, which significantly increase the efficiency of the entire process. But in the absence of such a device, any voltage source with suitable characteristics and adjustments can be used or an appropriate circuit can be assembled. There are several different ways how to charge a car battery.
One of them, the most common is chargingdirect current. In this case, the battery is charged with a current of 0.1 capacity of the battery. If its capacity is 55Ah, the current should be 5.5A. If the capacity of the battery is 90 Ah, the current will be 9A.
How much should I charge the car battery?And this is determined simply. The capacity of the battery should be divided by the amount of the charging current. As a result, the necessary time will be obtained. If the battery capacity is 90Ah and the current is 9A, the charging time will be 10 hours. In order to achieve the best possible charging by direct current, several nuances should be considered. For example, it is necessary to control the voltage, ensuring its permanence. And if there is no automatic voltage adjustment, then it will have to be done manually.
During the execution of the work, it is necessarymonitor the voltage on the battery. When it becomes equal to 14.4V, you need to reduce the charging current by half. This is due to the fact that during the charging process the electrolyte heats up, gas begins to be released - and there is a loss of energy and heating of the battery. To avoid this effect, this method is used. When the voltage on the battery reaches 14.4V, the battery is already partially charged and its further charge by a high current is no longer needed. Therefore, a reduction in current is needed.
Charging with such a half current is carried out untilthe voltage on the battery will not remain constant for two hours. Then it is believed that it was possible to fully charge the car's battery, and the work is stopped.
Here is a picture of charging the batterycar. Of course, the simplest and most common variant is described. There are other ways of charging. So, it is possible to carry out the forced charging of the battery, but at the same time it will be necessary to use a current of up to 0.7 of the battery capacity. And if you spend such a charge in conditions of using household electricity, then it is likely not to survive. And then there may be a fire.
There is a charging method with a constantvoltage, but even here in the first minutes of operation, a current may arise, exceeding the capacity of the household electricity network. Therefore, to charge the battery safely all will use the described method, or even better - use a special device. In it, all modes are supported automatically, and more sophisticated and efficient charging algorithms are involved.
The state of the battery is necessaryconstantly monitor and take timely measures when discharging it. How to charge a car battery, discussed above, describes charging modes, control methods and duration of the whole process.
