How to draw 0.5 amp of current from a 10Ah battery

[dave226]

Homework Statement

I am planning to use a Li-ion battery running my 4 small pmdc motors rated at 24V and 0.5amps. Is 24V 10Ah battery enough to provide sufficient power to run my application? There is a current controller which is rated at 3amps and voltage upto 44V. I want to restrict the current within the limits of controller which is providing an interface with four motors.

What is the exact way to draw a required amount of current from a battery rated at 10Ah?

Homework Equations

The Attempt at a Solution

I tried two small power tool batteries rated at 18V nearly 1.5Ah, it run my application at first for one or two second, but later on it discharged.

 

[turin]

Sounds like there might be something wrong with those power tool batteries (NiMH?). Anyway, you should be aware that "Ah" has nothing to do with power, but indicates the duration of the fully charged (new) battery. "The exact way to draw a required amount of current from a battery", is to simply connect it to the circuit requiring the power, and make sure that the battery is charged and has sufficient voltage. The circuit that it is connected to should determine the current. If you are concerned about overloading the motors, then you should use a current regulator.

 

[thomate1]

I would recommend using a 10Ah battery for this application. However, it is important to note that the voltage and current requirements for the motors should also be taken into consideration. If the motors require 24V and 0.5A each, then a 24V 10Ah battery should be sufficient to power all four motors.

To draw 0.5A of current from the battery, you will need to use a current controller or a voltage regulator that can limit the current to 0.5A. This will ensure that the motors do not draw more current than they require, and will also protect the battery from overloading.

Additionally, it is important to properly calculate the power requirements for your application to ensure that the battery can sustain the current and voltage demands. This can be done by using the formula P = VI, where P is power, V is voltage, and I is current. In this case, the power required would be 24V x 0.5A = 12 watts.

I would also recommend using a battery with a higher capacity, such as a 12V 20Ah battery, to ensure that it can sustain the current demands for a longer period of time. It is always better to have a battery with a higher capacity than what is required, as it will provide a longer run time and also prevent damage to the battery.

In summary, to draw 0.5A of current from a 10Ah battery, you will need to use a current controller or voltage regulator, and ensure that the power requirements for your application are within the capabilities of the battery. It is also important to use a battery with a higher capacity to ensure a longer run time and prevent damage to the battery.