The origin of lithium-ion batteries
The world's first lithium-ion battery
was born in the United States in March 1976. An oil company engineer
uses metallic lithium as the positive electrode and titanium sulfide as
the negative electrode. Relying on the movement of lithium ion positive
and negative electrodes, current is formed inside the battery to
complete the charging and discharging process, and interact with the
outside world to form electrical energy.
Through
research, the energy storage capacity and charge-discharge time of
lithium-ion batteries are far superior to other rechargeable batteries
at that time, which arouses great interest. After the 1980s, people
intensified the transformation of the lithium-ion battery prototype,
greatly improving its stability, size and production process.
Lithium-ion batteries are widely used in mobile digital and even
electric vehicles. But with the expansion of the scale of use, the risks
of lithium-ion batteries have gradually surfaced.
Advantages of lithium-ion batteries
1.
Lithium-ion battery high-voltage channel: The average voltage of a
single battery is 3.7V or 3.2V, which is approximately equal to the
series voltage of three nickel-cadmium batteries or nickel-hydrogen
batteries, which facilitates the formation of battery packs;
2.
Compared with batteries, lithium-ion batteries have a higher energy
density. The storage energy density is high, which has reached
460-600Wh/kg, which is about 6-7 times that of lead-acid batteries;
3.
Compared with lead-acid batteries, lithium-ion batteries are lighter in
weight, and the weight is about 1/5-6 of that of lead-acid products in
the same volume;
4. The
service life of lithium-ion battery is relatively long, and the service
life can reach more than 6 years. A battery with lithium iron phosphate
as the positive electrode, charged and discharged at 1CDOD, has a record
that can be used 1000 times;
5.
High power endurance. The lithium iron phosphate lithium ion battery
for electric vehicles can reach 15-30C charge and discharge capacity,
which is convenient for high-intensity startup and acceleration;
6. Low self-discharge rate and no memory effect;
7.
Lithium-ion battery has strong high and low temperature adaptability,
and can be used in the environment of -20℃--60℃, and can be used in the
environment of -45℃ after processing;
8.
Green and environmental protection, no matter it is produced, used, or
scrapped, it does not contain or exists toxic and harmful heavy metal
elements and substances such as lead, mercury, and cadmium.
Disadvantages of lithium-ion batteries
1. The safety of lithium-ion batteries is poor and there is a risk of explosion.
2. Lithium-ion batteries made of lithium cobalt oxide cannot be discharged at high currents, and their safety is poor.
3. Lithium-ion batteries need to maintain the circuit to prevent the battery from overcharging and over-discharging.
4. High production requirements and high cost.
BENZO Energy Technology Co.,Ltd
UFine Technology Co., Ltd
Site: www.bz-battery.com / www.benzoenergy.com
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