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High and low temperature test of single cell
In the wide application of modern electronic devices and electric vehicles, the stability of the performance of the single cell battery is crucial as the main energy storage device. Tests in both high and low temperature environments can help assess the adaptability and safety of batteries in extreme temperature conditions. This article will introduce the operation process of high temperature and low temperature test of single battery, the required instrument and the matters needing attention.
the purpose of high temperature and low temperature testing
Safety assessment: Testing the safety of the battery in extreme temperatures to prevent dangerous situations such as thermal runaway, leakage and fire.
Performance stability: evaluate the charging and discharging performance of the battery under high or low temperature conditions to ensure the reliability of the product in actual use.
Compliance: Ensure that batteries comply with relevant industry standards and safety regulations, and provide a basis for market access.
Cycle life: Through the temperature stress test, the cycle life and service performance of the battery are evaluated.
the basic principle of high temperature and low temperature test
High temperature test: test the working performance and safety of the battery in a certain high temperature environment. High temperature will accelerate the internal chemical reactions of the battery, which may lead to decreased battery performance, shortened life and even safety risks.
High temperature test: test the working performance and safety of the battery in a certain high temperature environment. High temperature will accelerate the internal chemical reactions of the battery, which may lead to decreased battery performance, shortened life and even safety risks.
Operation process of high temperature and low temperature test
Preparation Phase
Ensure that the testing area meets the safety requirements, and prepare the required test instruments and equipment.
Equipment selection and preparation
Select the appropriate high and low temperature box (temperature control box), can achieve high temperature (such as 60°C above) and low temperature (such as -20°C or lower) environment stable control.
Select the appropriate high and low temperature box (temperature control box), can achieve high temperature (such as 60°C above) and low temperature (such as -20°C or lower) environment stable control.
Connect the battery
Install the single battery to be tested into the test equipment to ensure that the battery is in good contact with the test environment and can effectively feel the environmental temperature change.
Set the test conditions
For high temperature test, set test temperature, duration, etc. For the low temperature test, the corresponding conditions are also set.
Typically, the test duration can be set from several hours to several days, depending on the battery type and test requirements.
Test it
Start the high and low temperature box and place the battery in the set temperature environment.
During the test, the battery is charged and discharged cycle, the voltage, capacity, temperature and other indicators of the battery are monitored, and the data are recorded.
Monitor and record data
Start the high and low temperature box and place the battery in the set temperature environment. During the test, the battery is charged and discharged cycle, the voltage, capacity, temperature and other indicators of the battery are monitored, and the data are recorded.
End the test
After the test, the battery was gradually restored to the normal temperature environment. Avoid rapid cooling to avoid thermal shock damage to the battery.
Perform a visual inspection of the battery to see if there is swelling, leakage, or other abnormalities.
Data analysis and report
The data recorded during the test were collected and analyzed to evaluate the performance changes of the battery in high and low temperature environments.
Write test reports to identify battery performance in extreme temperatures and possible safety hazards.
Required instruments and equipment
High temperature and humidity test box
Can accurately control the high temperature and low temperature environment equipment, suitable for single battery performance test.
Data logger
It is used to record the voltage, temperature and capacity data in the process of charging and discharging in real time to ensure the integrity and accuracy of the data.
Battery Tester
An instrument used to measure battery capacity, internal resistance and other electrical properties.
Temperature sensor
Monitor the temperature changes on the battery surface and inside the test chamber to ensure the accuracy of the test.
Safety protection facilities
Protective glasses, insulated gloves and fire protection equipment are included to ensure the safety of operators during testing.
Precautions
Safety first:
During the test, it is necessary to pay close attention to the temperature and state of the battery, and deal with the abnormal situation in time to ensure the safety of the operator.
Gradual temperature change:
When performing high or low temperature tests, avoid rapid changes in case the battery material is damaged due to thermal stress.
Calibration of test equipment:
Ensure that the temperature control equipment and monitoring instruments have been calibrated before testing to ensure that the test data is accurate and reliable.
Environmental Control:
The test environment should be kept stable to avoid the influence of external temperature and humidity changes on the test results.
Waste Disposal:
After the test, properly dispose of damaged or leaked batteries and follow the relevant environmental regulations.
Conclusion
High and low temperature testing is a key step to evaluate the performance and safety of single cell batteries in extreme environments. Through the strict test process and professional test equipment, the potential problems of the battery in the process of temperature change can be effectively found, and provide a basis for product improvement. Ensuring the scientific and safety of the test can not only improve the performance and reliability of the battery, but also provide a solid guarantee for its application in the market.
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