Lithium ion batteries are rechargeable batteries that are
characterized by very large power densities. Such batteries are now very
commonplace: from regular electronic products such as cell phones to
electric vehicles. What is not commonly appreciated is that voids play
an essential role in these batteries. As this case will illustrate the
void structure in a material, it does not always have to be spherical.
Let's first briefly describe the principal features of a lithium ion
battery and point out the significant purpose of voids in it.
are four components in a lithium ion mobile: anode, cathode, separator,
and the nonaqueous electrolyte. Different chemistries are utilized; the
anode is graphite, the cathode is an oxide (LiCoO2), and the
alternating layers of anode and cathode are separated by a porous
polymer separator, which is usually made of polypropylene (PP),
polyethylene (PE), or a laminate of PP and PE. In all cases a important
feature of the separator is a controlled amount and uniform dimension of
porosity in the separator.
Programs of lithium ion battery
ion batteries are utilized for carrying many different objects from
small earbuds and earphones through to mobile phones, tablets, laptops
and a host of other electronic gadgets and things. Cordless power tools
make widespread use of li-ion batteries as do other electrical items.
The Properties of Li-Ion/Polymer Batteries
might not be simple to have a comprehensive comprehension of one thing,
as different points of view can lead to different ultimate
understandings. Some but significant viewpoints, which might impact the
charge strategies, will be required to investigate the properties of
Li-ion batteries. The following diagram describes the relationship
between the cell capability and the cycle existence with assorted Li-ion
battery control voltages together with the cell capacity rated
The Protection of Li-Ion/Polymer Batteries
first step to use Li-ion/polymer batteries is to make certain that
they're within protection: from overcharge or over-discharge. Even
though there may be other protections, the protection circuit will serve
as the ultimate shield for Li-ion/polymer batteries. What the
protection circuit covers are over-voltage protection, over-current
protection and under-voltage protection, where over-current protection
is bi-directional, i.e. for overcharge and over-discharge. The next
diagram, in the RT9545 datasheet, is the application circuit of this
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