Evaluation_Engineering_October_2020 - 24

AUTOMATED TEST

"Thermal testing is an important aspect
of battery specification and qualification,
regardless of cell chemistry."
TotalTemp Technologies

THERMAL TESTING FOR
AUTOMOTIVE BATTERIES
By John Booher, TotalTemp Technologies 
	

Thermal testing systems have come a long way to meet the
requirements of current modern automobile manufacturing. Within the life of some people around today, we have progressed from full automobile electrical schematics that fit on
one page, and engine electrical components housed in wooden
boxes, to sophisticated computer systems that would have made
the heads of people spin in the day of Henry Ford or Karl Benz.
The overall cost/benefit of consumer vehicles has slowly
been tipping toward the electric vehicle. Given the great recent
advances in battery cost and weight per kWh and optimized
battery management systems, electric cars have become even
more practical. Additionally, charging infrastructure deployment and the cultural appeal of lowered emissions and energy

24

EVALUATION ENGINEERING OCTOBER 2020

independence, all push us toward more and better batterypowered vehicles.

Addressing Test Systems
Well-implemented thermal test systems offer automation features which can help coordinate test timing, charge/discharge
scenarios with the temperature control while monitoring multiple points of the battery or control systems. Further distinctions
of a well-implemented thermal test system would be as follows:
*	 A capable system that has good convection or a good conductive heat transfer path to get sufficient heat in and out
of the parts with efficiency. For example, a chamber with
poor airflow would appear to be "at temperature" when



Evaluation_Engineering_October_2020

Table of Contents for the Digital Edition of Evaluation_Engineering_October_2020

Instrumentation vs. Telemetry
By the Numbers
Automotive Test
Industry Report
Automated Test
Tech Focus
Testing Quandary
Signal Generators
Autonomous Vehicles
Automotive Test
Instrumentation vs. Telemetry
Instrumentation vs. Telemetry
Automated Test
By the Numbers
By the Numbers
High-Speed Digital
Industry Report
Industry Report
Testing Quandary
Tech Focus
Featured Tech
Autonomous Vehicles
Evaluation_Engineering_October_2020 - 1
Evaluation_Engineering_October_2020 - 2
Evaluation_Engineering_October_2020 - 3
Evaluation_Engineering_October_2020 - By the Numbers
Evaluation_Engineering_October_2020 - 5
Evaluation_Engineering_October_2020 - Industry Report
Evaluation_Engineering_October_2020 - Tech Focus
Evaluation_Engineering_October_2020 - Signal Generators
Evaluation_Engineering_October_2020 - 9
Evaluation_Engineering_October_2020 - 10
Evaluation_Engineering_October_2020 - 11
Evaluation_Engineering_October_2020 - 12
Evaluation_Engineering_October_2020 - 13
Evaluation_Engineering_October_2020 - 14
Evaluation_Engineering_October_2020 - 15
Evaluation_Engineering_October_2020 - Automotive Test
Evaluation_Engineering_October_2020 - 17
Evaluation_Engineering_October_2020 - 18
Evaluation_Engineering_October_2020 - 19
Evaluation_Engineering_October_2020 - 20
Evaluation_Engineering_October_2020 - 21
Evaluation_Engineering_October_2020 - 22
Evaluation_Engineering_October_2020 - 23
Evaluation_Engineering_October_2020 - Automated Test
Evaluation_Engineering_October_2020 - 25
Evaluation_Engineering_October_2020 - 26
Evaluation_Engineering_October_2020 - 27
Evaluation_Engineering_October_2020 - High-Speed Digital
Evaluation_Engineering_October_2020 - 29
Evaluation_Engineering_October_2020 - Testing Quandary
Evaluation_Engineering_October_2020 - 31
Evaluation_Engineering_October_2020 - Featured Tech
Evaluation_Engineering_October_2020 - 33
Evaluation_Engineering_October_2020 - Autonomous Vehicles
Evaluation_Engineering_October_2020 - 35
Evaluation_Engineering_October_2020 - 36
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