Today I will share with you how to match lithium battery packs and the role of protection boards. The voltage and current coordination of lithium battery protection boards are determined based on the actual usage of the battery pack. It is necessary to match the rated voltage and capacity of the battery. Commonly used protection boards generally support 3.7V lithium battery cells, with current levels ranging from 2A to 10A, which can be selected according to specific needs. The main function of lithium battery protection boards is to protect the battery pack from overcharging, over-discharging, over-current, etc., to ensure battery safety and stability. Specifically, lithium battery protection boards mainly achieve the following functions: 1. Battery status monitoring; 2. Overvoltage protection; 3. Undervoltage protection; 4. Short circuit protection; and 5. Overcurrent protection. In summary, lithium battery protection boards are the key equipment for protecting the safety and extending the lifespan of lithium battery packs. The voltage and battery capacity coordination needs to be selected based on actual usage, and the main function is to monitor battery status and protect against safety issues such as overcharging, over-discharging, over-current, and short circuits. It is important to prioritize safety when using lithium batteries.