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Battery Size Calculator-Calculating, Tool And Importance
You must be wondering what the need for a battery size calculator is.
Well, just imagine that you undersize the battery system and end up compromising its battery life. The battery will run out of power earlier than your expectations, and you'll have to buy another one to fulfill your needs. However, if you buy a battery that is sized perfectly with the device you intend to use it for, the performance will be up to par, and you won't have to mull over about changing the battery that often.
So, today, we will dig deeper into the aspects of battery size. We'll focus on calculating the battery size, the tools needed for calculation, and the importance of size calculation. By combining all these metrics, we will have an ideal battery system that can power all kinds of devices without disruptions. Let's begin now.
How Do You Calculate Battery Size?
The calculation of battery size is a procedure standardized by IEEE. Whether it is the lithium-ion batteries or nickel-cadmium battery type, there is a precisely laid out standard method to calculate the battery size of all kinds of batteries. So, if you are looking for Lithium-ion, here are the main factors that are accounted for in the calculation. Keep in mind that the design of the battery is not a part of this calculation.
1: Collect the Battery Load:
The first step to calculate the size is to determine the load that the battery will have to support. It is a significant factor; for example, consider an AC UPS system or a solar panel. Using a battery that can't tolerate the load put the UPS after power failure is pointless. Hence, you must know the load that the battery needs to support.
2: Construct Load Profile To Calculate Design Energy:
In case you don't know this, creating any type of battery needs a significant amount of energy. Constructing a load profile is easy when you know the desired use of the battery system. Then you'll have to calculate the design energy in Vah. In IEEE standards, the load profile is termed as a duty cycle, so make sure that you don't get confused.
3: Select Battery Type:
The third step is to select the battery type by accounting the factors given here.
- After overlooking the requirements, go through the characteristics of the battery cells. It must include battery cell capacity, temperature, electrolyte density, cell float voltage, and end of discharge voltage.
- Some battery types have significant advantages over other battery types. And that's why they are often used for specific purposes. Therefore, pay attention to the purpose of the battery during selection.
- 4: Number of Cells in Series:
- The number of cells used in a battery will change its specific voltage rating. As a result, matching the overall tolerance of the cells is necessary. The number of battery cells used in a system can be determined by using a minimum and maximum number formula.
- For maximum number = Nominal Voltage (1+ Max load voltage tolerance)/cell charging voltage
- For minimum number = Nominal Voltage (1- Minimum load voltage tolerance)/ Cell End of Discharge Voltage
- As long as the number of cells lies in between these numbers, your battery system will be able to handle the device and operate it smoothly.
5: Determine Battery Capacity: