What's the perfect batteries to get your robot powering?Embedded

By Maduranga Jayasinghe | 2016, October 31  Views : 255

මෙම පිටුව යාවත්කාලීන කරමින් පවතී...

The correct battery can make a huge influence to your robot. It all can be divided into four types: Lithium-Ion, NiCd based, Lead acid, and dry cells. With the requirement of mobile phones, laptops and tablets batteries high power and increased standby time, battery technology has improved significantly whole over the last decade.


Nominal cell voltage is 3.7V

Lithium batteries are more dangerous. But it offers some of the highest energy density and energy release available. This means a system powered in this way can use a smaller, lighter battery. There are two types of lithium batteries.

  • Type 1 : It has built in safety circuits, to protect against under- and overvoltage and short circuit.
  • Type 2 : It has no safety circuits! If you wish to upgrade your robot to LiPo, make sure to be safe.

NiCad / NiMH

Nominal cell voltage is 1.2 V

NiCad/NiMH based batteries were the number one choice before the rise of the lithium-ion batteries, due to their power-to-weight ratio and a predictable discharge voltage that changes little from 1.2V per cell until it nearly runs out.

Normally they've come in common general battery sizes, such as AAA, AA, etc. Chargers are also normally available manufactured by original battery manufacturer or other 3rd party accessories manufacturers and even being sold in supermarkets. The discharge rates are not as high as a Lithium-Ion battery, but they don't have a flammable metal in their construction. So, This type of batteries is good for the robotic system.

Lead Acid

Nominal cell voltage is 2V

Lead-Acid batteries are the granddaddy of all rechargeable batteries, the theLead-Acid battery was invented in 1859 by Gaston Plante. This type of battery has a very low energy density and is made of lead. This makes it a poor choice for use in the robotics, although it can supply high surge currents. While larger lead acid batteries are used in most cars, they're best ignored for this project due to their high weight and low energy density.

Dry Cell

Nominal cell voltage is 1.5V

Zinc-carbon and alkaline are the more common types of dry cells, widely available in common battery sizes like same as the NiCad/NiMH batteries. Although not rechargeable, they’re useful as an emergency replacement for NiCad / NiMH; however, you need to be careful with the increased voltage. They’re also expensive to continually replace.