The purpose of battery testing is generally for two reasons:
1. Understand the characteristics of the battery (starting from the battery itself): We need to understand the capacity, internal resistance, voltage characteristics, rate characteristics, temperature characteristics, cycle life, energy density and other important parameters of the battery through testing, which are needed to demonstrate whether the battery under test has reached the original design goal, and also need to achieve better management and control in the process of using the battery through these parameters.
2. Evaluate the ability of the battery to meet the needs (starting from the application scenario): This type of test can be understood as starting from the needs of the application, inverting the characteristics that the battery should meet, and verifying whether the battery under test meets the standard. For example, automakers will design battery cold start tests based on low-temperature driving scenarios, energy efficiency tests based on power consumption indicators, and power performance tests based on vehicle climbing or acceleration scenarios. In addition, from the perspective of vehicle safety, tests such as overcharge and overdischarge, short circuit, overtemperature, and extrusion puncture will be designed.
So when we come across a new test project, we can think about whether this test is for understanding the battery or for evaluating the ability to meet the application scenario. With this level of knowledge, you can further understand the content of the test.
