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Lithium
Ion Battery Manufacturing
A
lithium-ion battery (sometimes Li-ion battery or LIB)
is a family of rechargeable
battery
types in which lithium
ions move from the negative electrode
to the positive electrode during discharge and back when charging. Lithium-ion
batteries are common in consumer
electronics.
They are one of the most popular types of rechargeable battery for portable
electronics,
with one of the best energy
densities,
no memory
effect,
and a slow loss
of charge
when not in use. Beyond consumer electronics, LIBs are also growing in
popularity for military, electric
vehicle,
and aerospace
applications.
Specifications
and design
Lithium-ion batteries with a
lithium iron phosphate cathode and graphite anode have a nominal open-circuit
voltage
of 3.2 V
and a typical charging voltage of 3.6 V. Lithium nickel manganese cobalt (NMC)
oxide cathode with graphite anodes have a 3.7 V nominal voltage with a 4.2 V max
charge. The charging procedure is performed at constant voltage with
current-limiting circuitry (i.e., charging with constant current until a voltage
of 4.2 V is reached in the cell and continuing with a constant voltage applied
until the current drops close to zero). Typically, the charge is terminated at
3% of the initial charge current. In the past, lithium-ion batteries could not
be fast-charged and needed at least two hours to fully charge. Current
generation cells can be fully charged in 45 minutes or less. Some lithium-ion
varieties can reach 90% in as little as 10 minutes. Earlier trials of this technology ran into cost barriers, because the semiconductor industry's vacuum deposition technology cost 20–30 times too much. The new process deposits semiconductor-quality films from a solution. The nano structured films grow directly on a substrate and then sequentially on top of each other. The process allows the firm to "spray-paint a cathode, then a separator/electrolyte, then the anode. It can be cut and stacked in various form factors. Vacuum is Required in Several Steps of the Manufacturing Process
Vacuum Filling Systems for Lithium Ion Batteries An electrolyte vacuum filling machine for lithium ion batteries features a compact rotary dial table design and incorporates many automatic functions and features required to process high capacity Li-ion cells. The patented pre-fill system efficiently fills cells with accurate amounts of electrolyte. The system also minimizes the required amount of dry room space. Its robust design means low maintenance and high production efficiency.
Lithium Ion vacuum filling system A standard vacuum filling system includes the following features:
Servo motor-controlled seal-less ceramic metering pumps make electrolyte compatibility and salting issues a thing of the past
Sealing ma
Advantages and Disadvantages
Li Battery Applications
Purpose
of Vacuum
Suitable
Vacuum pumps
$15 billion in 2010,
$30 billion by 2015, greater than 85% from portable electronics and
transportation. Li
battery use has been growing by 20% every year since 2005 with this trend
expected to continue for many years. Investment on R&D for Li batteries is
more than the investment on all other batteries combined. For
more information on the use of vacuum in production and recycling of Lithium Ion
batteries, please contact Osanak at the numbers shown below or by email at o.mir@vpcinc.ca.
|
Vacuum Products Canada Inc. www.vpcinc.ca
1-800-269-6030 reachus@vpcinc.ca |
