![]() Pressure is applied to the folded matrix, helping keep the battery compact and maximizing contact between the anode and cathode layers and the lithium polymer. This matrix is then saturated with an electrolyte solution, filling in the interstitial space between the cathode and anode layers. This whole film is then folded accordion-style, which results in alternating layers of cathode and anode, with the continuous layer of semi-porous lithium polymer sandwiched throughout. A semi-porous lithium polymer separates each anode-cathode pair. ![]() Anode and cathode layers, typically made from aluminum and copper, are layered alternately. The use of a polymer electrolyte material allows LiPo batteries to have a much more compact build. These layers are then rolled to form the classical cylinder shape of batteries that everyone has become familiar with. Commonly known as a “jelly roll” orientation, each pair of these plates is separated by a polymer material. The traditional construction of a battery, as seen in Li-ion or Ni-Cd batteries, use anode or cathode plates layered alternately. Most LiPo batteries use any of four polymer types to suspend the lithium salt electrolyte: polyethylene oxide, polyacrylonitrile, polymethyl methacrylate, or polyvinylidene fluoride.Īside from the difference in electrolyte material, the construction of a LiPo battery is also radically different compared to older battery types. Instead of a liquid, the lithium polymer is a gel-like substance that can be configured into a very thin and long semi-porous layer. LiPo batteries improve on the design of traditional batteries by using its namesake, a lithium polymer, as an electrolyte. For instance, a potassium hydroxide solution is usually used as an electrolyte for Ni-Cd batteries. Older battery types, such as nickel-cadmium (Ni-Cd) and lithium-ion (Li-ion) use a liquid electrolyte solution. Charging the battery forces ions in the electrolyte solution from the cathode to the anode, and using the battery reverses this flow. It is thru the chemical reactions between the electrolyte and both the cathode and anode that a battery can store and generate energy. The cathode and the anode of the battery are separated by a polymer material which prevents them from coming into contact with each other and causing a short circuit. Any battery has three main components: a positive end (cathode, a negative end (anode), and an electrolyte solution. ![]() To understand why LiPo has become the battery technology of choice for RC aircraft, we need to understand how a battery works. How are they different from Li-ion and Ni-Cd batteries? Among other applications, LiPo batteries have been used for laptops, portable music players, e-cigarettes, power banks, and video game controllers. Currently, the mobile device and smartphone industry have started the transition from Li-ion, with more and more of the newer models choosing to use LiPo batteries. LiPo batteries are also known to have very high output values which have also made them appropriate for battery-operated airsoft guns. The compact and lightweight design of LiPo batteries have made them a viable alternative to a fuel power source for unmanned aerial vehicles. Although the development of LiPo batteries started in the 1970s, it is only in the recent year that they have become widely used in mainstream applications. “LiPo” is short for lithium polymer, which describes the type of electrolyte used in LiPo batteries. It’s good to do a lot of research before purchasing batteries, storage containers, or chargers and to look for 3rd party independent testing. Always follow manufacturer directions and never leave them charging unattended. Warning: Batteries can be dangerous and they can catch fire or explode. If you have a LiPo battery or are thinking of buying a device that uses one, then it’s worth your time to go through this whole guide. This guide was developed to provide all the essential information on LiPo batteries – what they are, how they work, what benefits they give, and how to care for them. Although LiPo battery technology is not new, it has enjoyed a surge in usage because of the increasing popularity of drones in the past couple of years. Hobbyists who own drones or other RC toys have probably used a LiPo battery at some point. ![]() 3D Insider is ad supported and earns money from clicks, commissions from sales, and other ways.
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