What Kind Of battery Should I Buy?1 month, 3 weeks ago | 1 Replies
I will try to make a topic about how to choose batteries for your projectAs a result, people in the forum will be better able to understand how to get the best value for money.Here are some parameters you should consider when choosing a battery.
The weight of the
Discharge rate ©
Use BMS/Yes or No
Budget – the price of your project
Voltage drop – how low is the voltage drop when you run out of power from the battery pack – or simply put, how much is the voltage drop when you are skating with load.
It is important to understand that you need to find the best solution for your project, not to overstate the battery parameters, but also not to choose a lower performance battery for your project.
Example: You want to build an electric board with the following parameters:
Working current 30A
Peak current 50A
Nominal voltage 36V
Capacity of 10 ah
The working power of motor is 1100W
A peak, 1800 w
I chose Unit 18650 for this project – but how to choose the right unit? !
If we know we need a battery that can handle 30A operating current at 10Ah capacity, then its 3C –
It is best to choose 15-20% more cells to enjoy a healthy battery pack for a long time.
So we need a battery that can do 36A operating current at 10Ah capacity, at least 3.5C.
We can choose the Samsung 30Q, for example rated 6C
It’s important to understand that it doesn’t make sense to choose a battery rated above 6C and pay more for a more expensive battery
For example, Sony VTC6 is a dead end for this project, and you spend more money for no reason.
But on the other hand, don’t do yourself a favor and opt for a battery rate below 3.5C.
Conclusion: Choose the battery whose rating is closest to the power of your project. Do not use a high rate battery that will not give you any difference, but do not go below the battery you need.
* If you choose to get a lighter, more cycles, or smaller, safer battery – you can pay more for it.
If you want a lot of cycles and the battery pack lasts 2-3 years, but you don’t care about size, weight, or high price – you should opt for LiFePO4 or Lithium Prism.
If you want maximum power in terms of size and weight, a fairly standard price, and low safety, you should choose LIPO
If you are looking for a balanced option — small size, light weight, medium cycle life and a good price point, you should choose Lithium Ion NCM 18650/ Lithium Ion NCM Soft Pouch Battery/Lithium Ion to match the power of your project.