Cyclic test
Charge-Discharge Cycling involves repeatedly charging and discharging the
battery to simulate actual usage conditions. This is helpful for evaluating capacity retention and overall performance within a specific number of cycles.
The depth of discharge (DoD) varies during the cycling process to simulate different usage scenarios.
Temperature test
High-temperature aging exposes batteries to high temperatures to accelerate aging. This is done to simulate the impact of high-temperature environments on battery life.
Low-temperature aging: Similarly, place the battery at a low temperature to assess whether it is accelerating aging
Accelerated aging is a testing method used to simulate and accelerate the aging process of products, materials or equipment in order to predict their performance over a longer period of time. This is particularly important in fields such as electronics, materials science, and the battery testing mentioned earlier. Accelerated aging tests aim to expose items to extreme conditions, such as high temperatures, humidity, voltage stress, or other environmental factors that may cause aging and degradation.
High-temperature test
Expose the battery to a temperature higher than normal operating conditions. High temperatures will accelerate the chemical reactions inside the battery, mimicking the effects of long-term use.
Increase the charging/discharging rate
Charge and discharge the battery at a rate higher than that of typical usage scenarios. This increased pressure helps identify potential weaknesses in the battery structure or chemical composition.
aggressive cycling
Perform fast charging and discharging cycles under high current to simulate intensive use. This is helpful for predicting the performance of the battery in frequent cycle applications.
Combined stress factor
Apply a combination of stress factors, such as high temperature and high voltage stress
Subject the battery to a voltage level that exceeds its normal operating range. This stress can reveal how batteries respond to overcharging or extreme voltage conditions.
Humidity and environmental exposure
Expose the battery to high humidity or other environmental factors to assess its resistance to moisture and other external conditions.
In addition to batteries, accelerated aging is also frequently used in various industries to assess the reliability and durability of products, ranging from materials used in electronic devices to those in construction and automotive parts.
Natural aging
Natural aging refers to the process in which products, materials or systems change and develop over time due to exposure to normal environmental conditions and usage. Unlike accelerated aging, which involves artificially increasing stress factors to accelerate the aging process for testing, natural aging occurs through regular exposure to everyday conditions. This concept applies to a wide range of materials and devices, including electronic products, metals, polymers and other substances.
Metals and alloys
Over time, metals may undergo natural aging processes such as corrosion, oxidation and fatigue. Exposure to moisture, air and temperature changes can cause these changes.
Electronic equipment
During normal use, electronic components, circuits and equipment may gradually deteriorate due to factors such as temperature fluctuations, humidity and electrical stress.
Paints and coatings
Due to exposure to ultraviolet radiation, moisture and temperature changes, the paint and protective coating on the surface may age naturally, leading to fading, cracking or peeling.
Although accelerated aging tests can provide a deep understanding of potential problems and weaknesses, natural aging remains a key consideration in evaluating actual durability and reliability. It is of vital importance to monitor and analyze the natural aging of materials and equipment to inform product design, maintenance plans and life cycle management strategies.
Selection and comparison
When conducting battery aging tests, it is important to carefully select and compare different testing methods to ensure a comprehensive assessment of the battery's performance over time. The following are the key considerations for choosing and comparing battery aging test methods:
Test purpose
Define the specific goals of battery aging tests. Are you focused on understanding calendar aging, cycle life, thermal stability, or a combination of multiple factors? Customize the testing methods to meet specific goals.
Realistic conditions
Simulate the operating conditions of the real world as much as possible. Take into account factors such as temperature, humidity, charging/discharging rate and usage mode to ensure that the test conditions reflect the expected application.
Accelerated aging and natural aging
Determine whether accelerated aging tests or natural aging tests (under long-term real conditions) are more suitable for your goals. Combining these two methods can provide a comprehensive understanding of battery performance. Loop rate to replicate complex real conditions.
