How to choose a charger for the car battery

In case of a sudden discharge car battery, the only way to breathe life into it — charge it with the charger.

2015-11-17 05:07:50 31

batterycharging processcar batterypulse chargercapacity batterycharging batteries

In case of a sudden discharge of the car battery, the only way to breathe life into it — charge it with the charger. The principle of operation of the charger for the battery is to reduce the mains voltage AC 220 V up to the nominal value of the battery, its rectification (conversion to DC), feeding to the terminals of the car battery and the automatic control of the charging process.

Types of chargers

Charging (charging-starting) the device is used for charging or recharging the battery before starting the engine. Equipped with wires of small section and connect it to the battery terminals disconnect vehicle electrical system from the battery is not required. Charging-starting device can operate in two modes: charging mode to perform the automated process of charging the battery , and in a starting mode to perform long pulsed return current of large magnitude, providing a successful engine start even with a dead battery. Its connecting wires have a bigger section than a normal charger. A prerequisite for using the trigger mode is to disconnect the on-Board network from the battery to avoid electronics.

Transformer and pulse chargers

Transformer charger is equipped with a powerful step-down transformer, the output of which is connected the same powerful the diode bridge rectifier. Most of these devices have considerable weight and impressive dimensions that delivers certain inconveniences in their operation. Transformer chargers currently are not produced, they were replaced by more modern and compact pulse charger. Pulse chargers consist of a small transformer, a charging is carried out by cyclic impulses of currents of small magnitude. Almost all "impulselike" equipped with a controller, which is tracking the main parameters of the battery, controls the charging process and after reaching the desired state of the battery stops supplying the charging current. The cost of the pulse charger is considerably more than the cost of a similar transformer device of the same capacity

Power device

When choosing chargers special attention should be paid to its power, or rather, on the strength of the charging current. The charging process of the battery low the charger will not only require a lot of time, the device itself is almost at the limit. Power supply charger must be at least 15%. To calculate the time required for charging the battery, divide the capacity on the strength of the charging current, and then to the resulting value add 10% (multiply by 1.1). For example, for charging batteries with a capacity of 50 Ah charger with an amperage of 10 A need 50/10*1,1 = 5,5 hours. To charge the same battery charger the battery capacity of 90 Ah battery will take nearly 10 hours. You feel the difference?

Extra options and functions

Display and output information on the charger can be implemented as a set of LEDs and the shape of the instrument display. Of fundamental importance, given the automation of all processes of charging in the modern "chargers", this has, by and large, the choice of interface depends solely on personal preferences. More important is the presence in charger function that allows you to extend the life of your car battery: overload protection, wrong polarity, short circuit, outside temperature into account when adjusting the charging process and etc. With this device, in the case of low battery you don't have to run the engine with a tug or by the "booster" from another car. We wish you to make the right choice! Good luck to you!


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