Lithium iron
phosphate is the Development Trend of Electric Vehicle Batteries
LiFePO4 battery
is heart cells of electric vehicle.
Why electric car battery is the heart? It is beginning
saying with the history of electric vehicles.Speaking of new
energy electric vehicles, it is easy to be grouped
into a new technology.In fact, the history of electric cars
is much earlier than we imagined , even earlier than fuel
vehicles. Thomas Davenport from America manufactured
the first DC motor drive electric car in 1834 ; Scotsman Robert
Davidson invented the electric drive train in 1834 ; Today
we still use the tram patented in 1840 in UK; The
world's first electric car was born in 1881 , the inventor
is French engineer Gustave TeLufu, which is
a lead-acid battery-powered tricycle.Gradually It comes out
lead-acid batteries, nickel cadmium batteries, nickel metal
hybrid batteries, lithium ion batteries, fuel cells as
electricity.
You
can see that although the electric car is earlier than
fuel vehicle development, and achieved a certain scale in the
early times,in modern times, to develop fuel
vehicles, electric vehicle frustrated in the competition. But
the real problem is that in the
past lead-acid battery-based electric vehicle,subjected
to the density of lead-acid battery life,power and
many other restrictions, there has been no way to work
out in the power source, which is a breakthrough on battery
aspect that make electric vehicle development stalled.
Classification
and the advantages and disadvantages of lithium battery
This issue gradually improve resolved until the lithium
battery shows to us and was developed for 20 years.
Lithium is
usually divided into two categories:
Lithium metal batteries: lithium metal
batteries generally use manganese dioxide as a positive
electrode material, lithium metal or its alloy as
the negative electrode material, the use of non-aqueous
electrolyte solution battery.
Lithium-ion batteries: lithium-ion battery is generally
used lithium alloy metal oxide cathode
material, graphite as the anode material, the use
of non-aqueous electrolyte battery.
Although the energy density of lithium metal batteries is
high, in theory, it can reach 3860 W
/ kg. However, due to their nature unstable and not
be charged, it can not be used repeatedly as a
power battery. While the lithium-ion batteries,because
of the ability to be recharged, was regarded as the main driving
force of development. But because of its different
elements with the positive material in all aspects of
performance vary widely,leading to a dispute on the
route to increase cathode materials.
Usually we put up the
main battery power: lithium iron phosphate batteries,lithium
manganese batteries, lithium cobalt oxide as well as
ternary lithium battery (three yuan nickel, cobalt and
manganese).
Above all kinds of batteries have advantages and disadvantages, roughly summarized
as follows:
Lithium iron phosphate:
Advantages: long life, large charge-discharge rate, safety,
and high temperature resistance, harmless elements, and low
cost.
Disadvantages: low energy density, low tap
density (bulk density).
