Page 37 - Automotive Solution for Automotive

Lithium-ion Batteries and Hydrogen Fuel

Multifaceted Evaluation of Lithium-Ion Rechargeable Batteries Evaluation for Ensuring Gas Supply Stability and
- Evaluation to Improve Safety Based on Simulation of Internal Battery Conditions - Long-Term Durability of Hydrogen Stations

– Analytical Instruments Used for Hydrogen Fuel Quality Control –
To improve the safety of lithium-ion rechargeable batteries it is necessary to analyze the changes that occur inside the battery during charging and To ensure fuel cell vehicles (FCV) can be driven safely and reliably for long periods, the quality of hydrogen fuel used in FCVs must be assured based on
discharging. In the following example, some of the conditions inside the battery are recreated by simulation to evaluate the changes occurring inside the international standard ISO 14687-2. In addition to specifying the purity of hydrogen, this standard also specifies 13 standards for a wide range of
the battery. In another example, the heat generated inside the battery was simulated and changes in the separators were observed with a scanning impurity components, which requires using multiple analytical instruments.
probe microscope (SPM). In an additional example, strength testing that simulated the separators being ripped by lithium metal dendrites precipitated Due to Shimadzu's broad analytical instrument product line, Shimadzu is able to satisfy customer needs not only for hydrogen fuel quality control
near the electrodes was used to observe the strain distribution occurring in the separators. analysis, but also for various other analytical requirements.
Observation of Separator Pores by SPM and Pore Contraction by Heating Analytical Instruments Used for Hydrogen Fuel Quality Control

Impurities governed by ISO 14687-2 are indicated in parentheses.

Total hydrocarbons
Oxygen
Specimen (1) Specimen (2) Specimen (3) Formaldehyde
Argon
Comparison of 3 Types of Separators
Nitrogen
Carbon dioxide
Carbon monoxide
Helium
Total sulfur
WET-SPM Series High Performance Liquid Chromatographs Gas Chromatographs
Room temperature 125°C 140°C Nexis GC-2030
Changes Caused by Heating of Specimen (1)

Formic acid
· An atmosphere control system can be used to observe materials in the desired temperature environment. Ammonia
· A wide variety of evaluations can be performed, such as evaluating localized physical and electromagnetic properties. Total halogens
· Physical properties can be mapped.

DIC Data Analysis and Evaluation of Lithium-Ion Rechargeable Batteries

DIC Analysis(Digital Image Correlation) DIC Analysis System Configuration
Ion Chromatograph
Digital image correlation (DIC) is a
technique that compares the random Integrated Workstation Ion Analysis System
patterns on the surface of objects before LabSolutions LC/GC
and after deformation to investigate how
much the pattern moved, for example. It Precision Particulate matter
can also be used to analyze the strain of Universal Testing Machine
components under high-temperature AGX-V Series (collected in a filter and weighed)
conditions, large structural members, or *Use for tensile, compression, Non-Contact Extensometer StrainMaster (LaVision GmbH)
micromaterials under a microscope. or pierce testing
TRViewX *Use for image analysis
Analytical Balances
Observation (DIC Analysis) of Lithium-Ion Rechargeable Battery Separator Strain During Tensile or Tensile Cycle Testing AP Series
In this example, separator damage is simulated by performing tensile and tensile cycle tests (where a constant target test force value is applied during tensile cycle testing) to evaluate
the separator strain properties before and after piercing damage.
Separator Tensile Test (30 fps recording speed at 20 second intervals) Separator Tensile Cycle Test (30 fps recording speed)
Loading speed: 10 mm/min 20 N target test force, 20 mm/min loading speed, and 20 cycles · Multiple analytical instruments can be controlled and corresponding data analyzed using a single workstation.
Strain Distribution During 20 N Tensile Load
Damage (indicated numbers correspond to numbers in the test force versus stroke graph). Note: The same computer can load data from analytical balances.
occurs Before
Damaged area
(round hole) 10
Gauge 5
Pierce test marks 0
0 1 2 3 4 5 6 7 8 Strain becomes concentrated at the damage point as the number of cycles increases during cycle testing
*Use to obtain digital video Stroke
images
· A variety of evaluations are possible, such as tensile testing, cyclic loading, and load holding tests.
· Strain distribution can be evaluated by combining DIC measurements.

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