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Lithium-polymer (LiPo) Batteries

Lithium-polymer (LiPo) batteries were first developed and commercialized in the early 1990s.

LiPo batteries are a type of rechargeable lithium-ion (Li-ion) battery, but they have a different electrolyte composition and packaging compared to traditional cylindrical or prismatic Li-ion batteries.

LiPo batteries consist of multiple layers of thin polymer sheets, which serve as the electrolyte and separator between the positive and negative electrodes. The polymer electrolyte enables the movement of lithium ions during charging and discharging processes. The electrodes are typically made of a lithium compound (e.g., lithium cobalt oxide for the cathode) embedded in a conductive polymer matrix.

You can see the process of how LiPo batteries are made in the video below:

Because of the fact that LiPo batteries are constructed with thin polymer sheets that serve as both the electrolyte and separator between the electrodes, their weight is significantly less than Li-ion batteries. Other advantages also include:

Flexible Form Factor: LiPo batteries can be manufactured in various shapes and sizes, allowing for greater design flexibility in devices and applications. This flexibility makes them suitable for thin and compact electronic devices.

High Energy Density: LiPo batteries offer high energy density, meaning they can store a significant amount of energy relative to their size and weight. This feature makes them ideal for applications where space and weight are critical factors.

Lightweight Design: LiPo batteries are lightweight compared to other battery technologies, which is beneficial for portable electronic devices and applications where weight reduction is important.

Good Discharge Characteristics: LiPo batteries have a relatively flat discharge curve, meaning they can provide a consistent voltage output over a majority of their capacity. This feature ensures stable and reliable performance for devices throughout their use.

Battery LiPo - Different types of LiPo Batteries

Battery LiPo – Different types of LiPo Batteries

LiPo batteries are widely used in various consumer electronics, such as smartphones, tablets, laptops, drones, remote-controlled vehicles, robotics and wearable devices. They are also utilised in certain industrial applications, such as medical devices, power banks, and electric models.