sunnyloha.blogg.se - Lithium batteries

A shielded notebook connector that lets power and information flow in and out of the battery pack.

A voltage converter and regulator circuit to maintain safe levels of voltage and current.

One or more temperature sensors to monitor the battery temperature.

The lithium-ion cells can be either cylindrical batteries that look almost identical to AA cells, or they can be prismatic, which means they are square or rectangular The computer, which comprises:.

That is not to say that lithium-ion batteries are flawless.

Lithium-ion batteries can handle hundreds of charge/discharge cycles.

They have no memory effect, which means that you do not have to completely discharge them before recharging, as with some other battery chemistries.

A lithium-ion battery pack loses only about 5 percent of its charge per month, compared to a 20 percent loss per month for NiMH batteries. Using lead-acid technology, it takes 6 kilograms to store the same amount of energy that a 1 kilogram lithium-ion battery can handle. A lead-acid battery can store only 25 watt-hours per kilogram. A NiMH (nickel-metal hydride) battery pack can store perhaps 100 watt-hours per kilogram, although 60 to 70 watt-hours might be more typical. A typical lithium-ion battery can store 150 watt-hours of electricity in 1 kilogram of battery. Here is a way to get a perspective on the energy density.

This translates into a very high energy density for lithium-ion batteries. Lithium is also a highly reactive element, meaning that a lot of energy can be stored in its atomic bonds.

The electrodes of a lithium-ion battery are made of lightweight lithium and carbon. They're generally much lighter than other types of rechargeable batteries of the same size.