Views: 204 Author: Hedy Publish Time: 2023-07-17 Origin: Site
Lithium-ion batteries charge quicker, last longer, and offer a better power density, resulting in longer battery life in a smaller container.Since Alessandro Volta invented the first battery or "voltaic pile" in 1800, batteries have gone a long way to power an unending variety of portable electronic gadgets that we all use on a daily basis. Gaston Planté created the first rechargeable battery, known as a lead-acid battery, in 1859. Sony marketed the first lithium-ion battery in 1980, and this new technology has since become used in practically all portable electronic devices, including smartphones, tablets, laptops, and wearables.
A typical lithium-ion battery may provide around 3.6 volts per cell. If you are currently utilizing a 12 volt lead-acid battery, three lithium-ion batteries will be required to produce the same voltage output. Lithium-ion batteries charge faster, last longer, and offer a better power density, allowing for more battery life in a smaller container.The weight of a Lithium-ion battery is determined by its size, chemistry, and energy capacity. A normal cell weights between 30 and 40 grams. A battery pack for a gadget is made up of cells that have been bundled together. Batteries for computers, mobile phones, and other portable gadgets sometimes have many cells connected in series (positive to negative) or parallel (positive to positive).
As already been mentioned, the weight of a lithium-ion battery pack is not a fixed number. It varies depending on the storage capacity and voltage of the cells in the pack. The most promising way to increase the energy density of batteries is to increase their voltage, but this comes with its own penalties. A smaller, lighter battery can be created by adding more cells to boost the voltage. The only problem is that more cells mean more weight.As an example, we will use a common 18650 lithium-ion cell found in many laptop computers and electric vehicles. This cell contains about 2 amp hours of charge at a typical voltage of 3.6 V. An electric car that needs 100 kWh of energy would require 14,285 cells to store its charge in these cells alone at 95 percent efficiency. Weighing in at around 50 grams each, this totals up to 714 kilograms (1,574 lbs).
Lithium ion batteries can weigh as little as 3g/Wh, or as much as 8g/Wh. A typical laptop battery weighs between 80 and 120Wh/kg, which means it weighs between 240 and 960g (or .5 to 2 pounds). A typical smartphone battery might weigh around 20-40g.This lithium ion battery weight calculator is a lightweight and easy-to-use tool that will assist you in determining the approximate weight of a lithium ion battery based on its specific energy, density, and volume. This article will provide an explanation of how a calculator works. This calculator will tell you how much your lithium ion battery pack weighs. It can assist you in determining if your battery is too heavy or not hefty enough. Enter the mAh and Volts for each cell. If you don't know the mAh and Volts of your battery, please contact the manufacturer.As engineers, we are frequently requested to estimate the weight of a battery pack rapidly. While basic chemistries like nickel metal hydride (NiMH) and lead acid are easy to offer a ballpark weight for, the enormous number of alternative formulations in lithium ion chemistry makes this more complex.
The capacity of a lithium ion battery pack in amp-hours (Ah) is the first step in estimating its weight. When creating bespoke packs, this is often given by the product specification for off-the-shelf batteries or by dividing the total energy (in Watt-hours) by the nominal voltage.The specific energy of our battery chemistry is the next step.The table below gives approximations for typical formulations:If you are utilizing an off-the-shelf battery, your manufacturer may have provided precise energy information. Otherwise, we can make an educated guess based on our chemistry. A Lithium Manganese Oxide battery, for example, with a nominal voltage of 3.6V and a specific energy of 120 Wh/kg would have 33 Ah of capacity and weigh 1kg.
The energy density of batteries is an important consideration. This can be defined in terms of specific energy (energy per unit mass) or energy density (energy per unit volume), however the two are closely connected in the case of batteries.It's not immediately obvious why energy density is important, but consider that a vehicle running on gasoline has to carry around its fuel; if it carries more fuel, it can go further. So by increasing the energy density of its fuel, you can make a vehicle lighter and more efficient. The same applies to an electric vehicle: because it carries its battery around with it, a higher-density battery means a lighter vehicle.As we've already seen, lithium-ion batteries have much higher power densities than their predecessors. But they also have much higher specific energies - typically 150 Wh/kg compared to 50 Wh/kg for lead acid batteries and 70-90 Wh/kg for nickel metal hydride types.
In fact the specific energies of lithium-ion batteries are comparable to those of gasoline. So why don't electric vehicles have ranges comparable to gasoline vehicles? Surely that would mean that gasoline has less than half the specific energy of lithium ion? No - it turns out that modern gasoline engines are about 40% efficient, so a cell with 150 Wh/kg could give an EV with 60% drivetrain efficiency a range comparable to a gasoline vehicle.This isn't just a question of technology: even if we had batteries with the same energy density as gasoline (and we don't), we'd still need to find ways to reduce the weight and volume taken up by other components in the car - everything from tyres to axles to engine mounts needs to be much lighter if we want electric vehicles that can challenge their gasoline equivalents in terms of range.
A lithium ion battery is made up of several different components: the cathode, anode, separator, electrolyte, and current collector. The chemistry of the cathode and anode determine the type of lithium ion cell (e.g. LiCoO2, LiFePO4, etc.) and thus the capacity, rate capability, safety characteristics, and cost of the cell. The typical cell configuration in a vehicle is prismatic or cylindrical with a capacity between 20-85 Ah.The cathode material makes up roughly 30% of the mass of a lithium ion battery cell. The anode makes up roughly 30% of the mass as well. The separator accounts for 15%, while the current collector is just under 10%. Electrolyte (including additives) makes up about 2% by mass and everything else accounts for roughly 13%.
Lithium-ion batteries are often regarded as the best type of rechargeable battery for portable electronics. They have one of the best energy densities, no memory effect, and low self-discharge. For these reasons, lithium-ion batteries are used for a wide range of portable electronics.