In recent decades, with the increasing demand for lithium batteries in notebook computers, electric vehicles, UPS power supplies, etc., people have put forward more stringent requirements for the performance and safety of lithium battery products. As an important checkpoint for the safety of lithium batteries, the importance of lithium battery testers has also become very important. Facing the mixed testing equipment in the market, all kinds of exaggerated publicity, and hype technical terms, from the aspects of test items, types, performance and so on. How do we correctly choose a lithium battery testing equipment that really meets the needs?
1. First of all, from the main test items, it mainly includes battery cycle life test, capacity test, charge and discharge characteristic test, charge retention test, factory consistency test, temperature characteristics, rate characteristics, constant power characteristics, pulse characteristics, Open circuit voltage, energy efficiency, safety test, etc.
2. Secondly, lithium battery testing equipment is divided into linear type and feeder type according to the energy consumption mode.
Linear type In the discharge process, the current passes through the load and is mainly consumed in the form of heat energy. Advantages: simple structure, relatively simple and mature technology, easy to install and maintain. Suitable for low power charging and discharging.
In the grid-feed type, during the discharge process, the battery energy is fed back to other equipment for battery charging or to the grid through a bidirectional inverter. Advantages: small footprint, energy saving and consumption reduction, and reduced air conditioning cooling and heat dissipation costs. It is suitable for high-voltage high-capacity batteries or charging and discharging or large-scale charging and discharging.
3. Finally, how to judge the performance of lithium battery testing equipment, we can consider from the aspects of test accuracy, current response time, switching time, data acquisition frequency, software performance, auxiliary functions, etc.
If the lithium battery fails to meet the performance requirements, the battery may spontaneously ignite or even explode during charging or discharging, which seriously threatens the safety of users. Therefore, we must choose a full-featured lithium battery tester to conduct a comprehensive pre-factory test on the lithium battery to ensure the safety of the battery.