The importance of lithium battery voltage in practical applications

The importance of lithium battery voltage in practical applications
Compatibility with the device
The voltage of lithium batteries must match the voltage requirements of the electrical equipment to ensure its normal operation. If the battery voltage is too high, it may damage the electronic components of the device. If the voltage is too low, the equipment will not be able to obtain sufficient power to drive and will not be able to work normally. For instance, consumer electronic products such as mobile phones and tablet computers are usually designed to be compatible with 3.7V lithium-ion batteries. If batteries with mismatched voltages are used, it may lead to serious consequences such as the device failing to power on, screen flickering, or even burning out the motherboard. In the field of electric vehicles, the total voltage of the battery pack needs to match the voltage requirements of components such as the motor and the electronic control system to ensure the vehicle's power performance and safety. ​
The role of the Battery Management System (BMS)
To ensure that lithium batteries operate within a safe and efficient voltage range, the battery management system (BMS) plays a crucial role. BMS can monitor parameters such as voltage, current and temperature of the battery in real time. By precisely controlling the charging and discharging process, it prevents overcharging and overdischarging of the battery and protects its safety. For instance, when the battery voltage reaches the charging cut-off voltage, the BMS will automatically cut off the charging circuit to prevent the battery from being damaged due to overcharging. When the battery voltage drops to the discharge cut-off voltage, the BMS will limit the power consumption of the device or issue a low battery warning to remind the user to charge it in time. In addition, BMS can also adjust the voltage of each individual battery in the battery pack through the balance management function, ensuring the consistency of the battery pack and extending its service life. ​
3. The impact on energy storage and release efficiency
The voltage stability of lithium batteries directly affects their energy storage and release efficiency. In energy storage systems, a stable voltage output can ensure the efficient storage and release of electrical energy and reduce energy loss. If the battery voltage fluctuates greatly, it will not only reduce the overall efficiency of the energy storage system, but also may have an adverse impact on the stability of the power grid. For instance, in photovoltaic power generation energy storage systems, lithium batteries need to stably store the electrical energy generated by solar panels and output a stable voltage when needed, providing reliable power supply to users. Therefore, enhancing the voltage stability of lithium batteries is of great significance for improving the performance and economy of energy storage systems. ​