main purpose is to ensure that batteries power a variety of devices without connecting them to the AC electrical current.For this battery should implement the accumulation of charge and have the ability to keep it up to the moment when the device is operational.Batteries, unlike ordinary batteries, have the ability to restore its charge.Many batteries were created as an alternative to the usual batteries.Reusable makes them more economical and convenient to use.AKB is a system of batteries which are connected in parallel or sequentially.The most common second connection type.Such a method is needed to obtain high output voltage.With this scheme it is possible to use several batteries in which the output voltage is much lower total.
Specifications Battery
The main parameters of any of the battery are:
- type (such as lead acid, gel, nickel-cadmium, nickel-metal hydride, lithium ion, lithium polymer, and others.);
- inrush current of the battery (starting power);
- minimum voltage;
- battery capacity;
- operating voltage;
- temperature characteristics.
What is the starting current of the battery?
This parameter is important characteristic of car batteries.The inrush current of the battery is closely related to temperature control operation.This figure is considered to be mainly for regions with harsh climates, because it shows the ability to run a cold battery power unit of the vehicle that is most relevant in the winter.A numeric value that indicates a start-up current from the battery (nominal value) corresponds to battery power, which it is able to give out for 30 seconds at ambient temperature of minus 18 degrees Celsius.
What determines the capacity of the battery?
magnitude that characterizes this option due to the value of the discharge current and the average value of potential difference circuit, which is determined by measuring at regular intervals.The formula calculates the starting current of the vehicle's battery is as follows: P (power battery) = I (current discharge) • U (voltage level).During startup of the power unit of the vehicle through starter motor the nominal voltage of the battery is significantly reduced.A discharge current is increased.Simply put, as a result of the fact that the starting current of the battery is a constant increase in capacity, which is spent battery to start the engine of the car, reduces the potential difference on the findings.It turns out that the lower the voltage, the more complex the starter crank power unit.As a result, we can derive an inverse relationship: the higher the starting power from the battery, the more revolutions make the starter when starting.All this allows for much faster start a motor vehicle.
ratings of Battery
When testing the battery with a predetermined duration produced an electric shock.The amount consumed is similar to its rated current starter.The discharge continues until the residual stress at six volts.The passport battery make all measurement intervals, which produced Readings potential difference across the terminals of the battery.Time starter discharge characterizes the electrical supply of the battery.In other words, a reserve capacity battery for starting the power unit.In this case, the important role played by the value of the nominal capacity of the battery - it will be higher than the more attempts provided the owner to start the engine.Furthermore, it should be noted that the starting battery current may be different for completely identical in dimensions and the nominal value of the battery capacity.It primarily depends on the materials used in the manufacture of devices, their properties, and by its structural features.As an example is the ability of the battery to increase the value of the inrush current when the level of porosity used lead plates, increasing their number, the use of phosphoric acid as active paste and so on. D.
inrush current of the battery to "diesel»
tend to increase the value of starting power batteries are, that are designed for use with diesel powertrains.This is due to the fact that for cranking the crankshaft "diesel" requires much more effort.Thus, the capacity of batteries 55A-h for the petrol engines have a starting current 255A, and similar battery for diesel - 300A.
choosing a battery for your car
If the selection of batteries you find that the parameters being equal capacity, dimensions and other one of the options under consideration has a large inrush current, you can safely opt for it.This will give you an additional advantage when you start the power unit in the winter.It is not to be feared that this option can have whatever that may be a negative impact on the performance of the vehicle's electrical systems.After start-up current - is the value that has an impact solely on the quality and reliability of starting the engine.Regardless of the characteristics mentioned, the battery voltage will be standard, and electrical efficiency affects only this factor.
Explanations for some parameters selecting
Starting current new battery should not be lower than in the old (to be replaced).It is not necessary to take a new battery with a smaller amount of electric capacity (A / h).The fact that under certain operating conditions of the motor (for example, idling) and minor odometer of the vehicle battery at night like "help" to supply the generator included consumers.As a result, small electric capacity of the battery depth of discharge can be more than 40-50%, and this will reduce battery performance in start-up mode.
Common standards
When buying a battery should be aware that the value of inrush current to the battery housing can be specified in various standards.For example, in Germany received its type - DIN, in the United States - SAE, and in the European Union - EN.For convenience, the orientation of the data characteristics of the battery sellers can ask a special list of conformity, defining the starting current of the battery.Table of compliance to the various standards is shown in the photo above.
What is the difference methods for determining the inrush current?
Let's look in more detail how these parameters are defined in various countries:
1. The European Union decided to measure (low battery) at a temperature of minus 18 degrees Celsius to 7.5 V for ten seconds.
2. In Germany, during the test car battery is discharged to nine volts for 30 seconds, under the same temperature conditions as in the EU.
3. In US battery is discharged to a voltage of 7.2 V for 30 seconds at the same temperature.
As you can see, when testing only changes the value of the boundary voltage and discharge time.It is believed that the closest standard to our guests - a German technique.
Conclusion In summary, it should be noted that the batteries for automobiles, the starting current which has a large stock, can bring you to the cold weather in the same way as the low battery starter output.The fact is that any battery requires regular care and very careful.And this applies to so-called maintenance-free battery.In this case, care is to periodically recharge after a long operation of the vehicle in urban cycle.The main negative impact on the performance of the product have little mileage car, driving at low speeds, as well as downtime in a traffic jam.Moreover, do not forget to periodically diagnose and troubleshoot faults of electrical system.These actions allow you to significantly extend battery life and avoid the hassles associated with the problems of the power unit run in winter.
