With the rapid development of electric vehicles and energy storage systems, monomer power Battery as a key energy storage unit, its performance and security have attracted much attention. In the process of R & D and production of single power battery, strict tests are needed to ensure its stable performance, safety and reliability. This article will introduce the testing process of single power battery, as well as the equipment and methods used in the testing process.

I. Appearance inspection

the first step in the test process is to check the appearance of the single power battery. Visual inspection includes checking the battery shell, connector, insulation material etc components to ensure that the appearance is complete, no damage, no foreign matter, etc. This step is usually carried out by using high-definition cameras, microscopes, surface detection instruments and other equipment.

II. Size measurement

dimensional measurement is an important part of the testing process, which is used to verify whether the geometric dimensions of the single power battery meet the design requirements, including parameters such as length, width, thickness, etc. Commonly used size measuring equipment includes coordinate measuring machine, laser range finder and Digital caliper, etc.

III. Static performance test

static performance test includes testing the capacity, energy density, internal resistance and other performance indexes of single power battery. The capacity test usually uses constant current discharger, electrochemical workstation and battery capacity measuring instrument, which are used to measure the actual capacity and energy density of single cells; The internal resistance test requires the use of special internal resistance test equipment.

IV. Dynamic Performance Test

V. High and low temperature performance test

high and low temperature performance test is used to evaluate the performance of single power battery under extreme temperature conditions. Common equipments include constant temperature and humidity test box, high and low temperature cycle box and thermal shock box, which are used to evaluate the charge and discharge performance and cycle life of single cell at different temperatures.

VI. Safety performance test

safety performance testing is a crucial part of the testing process, which is used to evaluate the safety performance of single power batteries in unexpected situations. This includes short circuit test, overcharge test, overdischarge test, etc., which need to be carried out with special safety performance test equipment.

VII. Environmental adaptability test

environmental adaptability test is used to evaluate the performance of single power battery under different environmental conditions, including humidity test, vibration test and corrosion test. These tests can simulate the performance of single battery in various use environments to ensure its stable and reliable operation.

VIII. Safety certification test

finally, the single power battery also needs to carry out relevant safety certification tests, such as CE certification, UN38.3 certification, UL certification, etc. These tests are usually provided by certification bodies to verify whether single cells meet the safety requirements of international and industry standards.