What is the difference between liquid batteries and solid-state batteries in terms of safety testing?
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What is the difference between liquid batteries and solid-state batteries in terms of safety testing?

Posted Date: 2024-01-16

As two major battery technologies, liquid batteries and solid-state batteries not only differ in basic structure and performance, but also have significant differences in their safety testing. These differences are mainly reflected in the focus of testing, testing methods, and processing of test results.

1. Differences in testing focus

For liquid batteries, since they contain flammable liquid electrolytes inside, the focus of testing is usually on safety issues such as preventing electrolyte leakage, battery thermal runaway, overcharge, and over-discharge. Safety tests for liquid batteries usually include acupuncture tests, high temperature tests, overcharge and overdischarge tests, and short circuit tests to simulate various extreme conditions that the battery may encounter in actual use.

For solid-state batteries, since they use solid electrolytes, the focus of testing is more on the stability of the solid electrolyte and the thermal management performance of the battery. Safety tests for solid-state batteries also include high-temperature tests, overcharge and over-discharge tests, and short-circuit tests. However, compared to liquid batteries, solid-state batteries generally perform more stably in these tests.

2. Differences in testing methods

There are also differences between liquid batteries and solid-state batteries in testing methods. For example, liquid batteries usually require more stringent testing conditions when performing needle puncture tests because the presence of liquid electrolytes makes batteries more susceptible to thermal runaway after needle puncture. For solid-state batteries, since there is no liquid electrolyte inside, the conditions for acupuncture testing can be relatively relaxed.

In addition, when conducting high-temperature testing, liquid batteries usually need to simulate a higher temperature environment to test their safety under extreme high-temperature conditions. For solid-state batteries, due to the good high-temperature stability of the solid-state electrolyte, the conditions for high-temperature testing can be relatively mild.

3. Differences in test result processing

There are also differences between liquid batteries and solid-state batteries in the processing of test results. For liquid batteries, due to their greater safety risks, test results usually require more detailed and rigorous analysis to determine the safety performance of the battery under various extreme conditions. For solid-state batteries, due to their high safety, the analysis of test results can be relatively simple, focusing mainly on the performance and stability of the battery.

In general, the differences in safety testing between liquid batteries and solid-state batteries are mainly reflected in the focus of testing, testing methods, and processing of test results. These differences exist due to differences in the basic construction and performance of the two batteries. With the continuous development and advancement of battery technology, these differences may gradually shrink or even disappear in the future, but for now, these differences are still one of the important signs that distinguish liquid batteries and solid-state batteries.

About Bell:

Guangdong Bell Testing Equipment Co., Ltd. is a high-tech enterprise dedicated to the research and development, manufacturing and sales of environmental reliability testing equipment, battery safety testing equipment and vehicle testing equipment. Cases can be found in major research institutes, schools, testing institutions, enterprises, laboratories, etc. across the country. It has mature experience and installation capabilities in designing and manufacturing large-scale non-standard complex test equipment, and can provide first-class solutions for customers' product testing.


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