Lithium lifepo4 battery

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Cell Balancing for Maximum Battery Pack Performance

Cell Balancing for Maximum Battery Pack Performance

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what's the advantage if we balance the battery cells ?

Cell balancing is a technique that improves battery life by maximizing the capacity of a battery pack with multiple cells in series, ensuring that all of its energy is available for use. A cell balancer or regulator is a functionality in a battery management system that performs cell balancing often found in lithium-ion battery packs electric vehicles and ESS applications.

Typically, individual cells of a battery pack have different capacities and are at different SOC levels. Without redistribution, discharging must stop when the cell with the lowest capacity is empty, even though the other cells are still not empty. This limits the energy delivering capability of the battery pack.

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How to choose suitable battery for your application?

 How to choose suitable battery for your UAV, UAS, RC, or robotics application, LiPo (lithium polymer pouch cells) OR Li-ion (lithium-ion cylindrical cells) ? Firstly, we have to understand the pros and cons of both.

Pros of Lithium Polymer(pouch cells):

  • LiPo’s hold the highest voltage under load of all lithium batteries so they perform well in high amp draw applications

  • LiPo batteries come in many different form factors so they can be built to fit lots of applications

  • Maintains lower temperatures under high discharge

Cons of Lithium Polymer(pouch cells):

  • LiPo’s are more prone to thermal runaway when punctured or damaged

  • LiPo batteries provide around half the life cycles of a  Li-Ion

  • Can be discharged down to 3v per cell

Pros of Lithium ion(cylindrical cells):

  • Li-ion batteries are higher energy density(Wh/kg) which allows for longer runtimes and lighter weight

  • Lithium-ion batteries are safer than lithium polymer because of the metal enclosure

  • Can be discharged down to 2.5v per cell

Cons of Lithium ion(cylindrical cells):

  • In high amp draw applications, they will have lower voltage under load compared to lithium polymer

  • They are round cells in specific sizes which can create some limitations to fit in certain applications

  • They tend to hold higher temperatures during and especially after performing a higher discharge rate

We hope this gave you a better idea of what is better for your application.

We have make below tips for your easy understanding:

If you are looking for the highest voltage under load(punch or top speed) then choose a LiPo.

If you are looking for the highest capacity for the weight(energy density), choose Li-ion.

If safety is a big concern, then choose Li-ion.

More information on which is better for your application, please contact our battery tech team by clicking here; we would love to help.

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What are the cells in lithium-ion battery?

What are the cells in lithium-ion battery?
Lithium-Ion batteries use 3 cells to provide an 11.1 volt battery, 4 cells to provide a 14.8 volts battery or 10 cells to provide 37 volts battery. CAPACITY: Lithium-Ion cells are place in parallel to provide the amount of amp-hours (Ah) required.
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