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  • 15/07/2024

Shimadzu – Membrane puncture test

Puncture resistance of membranes at different temperatures

Mechanical strength at high temperatures is a necessary property for safety, especially when a battery is being charged. Here is an example of a puncture test to evaluate mechanical strength at high temperatures.

Shimadzu - Membrane puncture test

Cause and result

Membranes (separators) not only ensure the conductivity that allows the lithium ions to move smoothly between the positive and negative electrodes, but also serve as insulation to prevent direct contact between the positive and negative electrodes. Mechanical strength at high temperatures is a necessary property for safety, especially when a battery is being charged.
Here is an example of a puncture test to evaluate mechanical strength at high temperatures. In a Shimadzu universal testing machine with a thermal chamber, a plunger is pressed into a membrane clamped all round by means of a pressure cage until it pushes through the material.
When comparing the test results at 25°C and 60°C in Figure 1 and Table 1, the maximum load force was the same, but the maximum displacement at 60°C was greater than that at 25°C.
When comparing the test results at 60°C and 90°C, the maximum displacement was the same, but the maximum load force at 90°C was greatly reduced.
This shows that the separators used in this test exhibited good heat resistance with high elongation and no reduction in strength at a temperature of 60°C.

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Shimadzu is a manufacturer of highly accurate testing and measuring technologies.

The Shimadzu Corporation has been doing business based on its corporate philosophy, “Contributing to Society through Science and Technology,” since being founded almost 150 years ago.

Highly accurate testing and measuring technologies from Shimadzu is used to support product inspection and quality control processes for manufacturing in industrial fields. It helps to ensure our lives to be worry-free and safe.

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