EVLN: Army EV pack core temperature estimating patent

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EVLN: Army EV pack core temperature estimating patent

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https://techlinkcenter.org/army-assigned-patent-on-core-temperature-estimation-for-electric-vehicle-battery-packs/
Army assigned patent on core temperature estimation for electric vehicle
battery packs
Mar 12, 2019  Troy Carter

[image  
https://techlinkcenter.org/wp-content/uploads/2019/03/Nissan_Leaf_012-1232x600.jpg
A cutaway model of a Nissan Leaf shows the electric vehicle's battery packs
]

Research performed at the University of Michigan

The U.S. Patent and Trademark Office assigned U.S. Patent 10,230,137 to the
U.S. Army on Tuesday.

The patent protects a new invention called “Estimating Core Temperatures of
Battery Cells in a Battery Pack.”

Experimental vehicles being tested by the Army are powered by
cylinder-shaped lithium-ion batteries. The batteries are stacked in packs
and containerized to prevent accidental ruptures.

Automotive and industrial machinery companies are also using battery packs
in electric and hybrid vehicles.

Monitoring the temperatures of the batteries is necessary for maintaining
optimal power output.

“Past attempts, however, have been fraught with shortcomings and can be
largely inaccurate, unreliable, and in some cases impractical,” the patent
states. “In one example, a surface temperature of a battery cell is measured
and taken as it core temperature. But this can be grossly inaccurate as
temperatures between the surface and the core can differ by as much as 30
degrees Celsius.”

The improved method of estimating battery temperatures involves measuring
the surface and coolant temperatures, along with internal electrical
resistance, which are fed into a mathematical formula.

The invention was co-assigned to the University of Michigan and was
supported by a contract from the U.S. Army Tank-Automotive & Armaments
Command.

Businesses can contact TechLink for more information on licensing thousands
of available technologies from the Department of Defense.The U.S. Patent and
Trademark Office assigned U.S. Patent 10,230,137 to the U.S. Army on
Tuesday.

The patent protects a new invention called “Estimating Core Temperatures of
Battery Cells in a Battery Pack.”

Experimental vehicles being tested by the Army are powered by
cylinder-shaped lithium-ion batteries. The batteries are stacked in packs
and containerized to prevent accidental ruptures.

Automotive and industrial machinery companies are also using battery packs
in electric and hybrid vehicles.

Monitoring the temperatures of the batteries is necessary for maintaining
optimal power output.

“Past attempts, however, have been fraught with shortcomings and can be
largely inaccurate, unreliable, and in some cases impractical,” the patent
states. “In one example, a surface temperature of a battery cell is measured
and taken as it core temperature. But this can be grossly inaccurate as
temperatures between the surface and the core can differ by as much as 30
degrees Celsius.”

The improved method of estimating battery temperatures involves measuring
the surface and coolant temperatures, along with internal electrical
resistance, which are fed into a mathematical formula.

The invention was co-assigned to the University of Michigan and was
supported by a contract from the U.S. Army Tank-Automotive & Armaments
Command.

Businesses can contact TechLink for more information on licensing thousands
of available technologies from the Department of Defense.
[© techlinkcenter.org]


+
http://koreabizwire.com/e-mart-to-sell-twizy-compact-electric-vehicle/133753
E-Mart to Sell Twizy Compact Electric Vehicle
March 8, 2019  (Korea Bizwire) — E-Mart Inc. announced its plans on Thursday
to sell Twizy, an electric vehicle designed by Renault Samsung Motors Corp.,
at 25 of its stores ...
http://koreabizwire.com/wp/wp-content/uploads/2019/03/1VGHXRCCO7_1.jpg




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