Lithium batteries are widely used, from civil digital and communication products to industrial equipment to military power supplies. Different products require different voltages and capacities. Therefore, lithium-ion batteries are used in series and parallel. The application battery composed of protective circuit, shell and output is called battery pack. The battery pack can be a single battery, such as mobile phone battery, digital camera battery, MP3, MP4 battery, etc., or a series parallel combination battery, such as notebook computer battery, medical equipment battery, communication power supply, electric vehicle battery, standby power supply, etc.
1. Composition of lithium battery pack:
The battery pack consists of battery pack, protective board, outer package or shell, output (including connector), key switch, power indicator, auxiliary materials such as EVA, bark paper, plastic bracket, etc. The external characteristics of the wrapper are determined by the application. There are many kinds of packages.
2. Characteristics of lithium battery pack
▪ It has complete functions and can be used directly.
▪ There are many kinds. Multiple packages can be implemented for the same application.
▪ The battery pack needs a high degree of consistency (capacity, internal resistance, voltage, discharge curve, life).
▪ The cycle life of the battery pack is lower than that of a single battery.
▪ Use under limited conditions (including charging, discharge current, charging method, temperature, humidity conditions, vibration, force level, etc.)
▪ The protection board of lithium battery pack needs charge equalization function.
▪ High voltage and high current battery packs (such as electric vehicle batteries and energy storage systems) require communication buses such as battery management system (BMS), can, RS485, etc.
▪ The battery pack has higher requirements for chargers. Some requirements were communicated with BMS. Its purpose is to make each battery work normally, make full use of the energy stored in the battery, and ensure safe and reliable use.
3. Design of lithium battery pack
▪ Fully understand the application requirements, such as application environment (temperature, humidity, vibration, salt spray, etc.), service time, charge and discharge mode, electrical parameters, output mode, life requirements, etc.
▪ Select qualified batteries and protective plates according to the use requirements.
▪ Conform to size and weight requirements.
▪ The package is reliable and meets the requirements.
▪ The production process is simple.
▪ Program optimization.
▪ Reduce costs.
▪ Detection is easy to implement.
4. Precautions for using lithium battery!!!!
▪ Do not use or ignite near the heat source!!!!
▪ Do not connect positive and negative output metals directly together.
▪ Do not exceed the battery temperature range.
▪ Do not squeeze the battery hard.
▪ Use a dedicated charger or the correct method to charge.
▪ Please charge the battery every three months when it is idle. And place it according to the storage temperature.
|
Last item:Which is safer, ternary lithium battery or lithium iron phosphate battery?
Next:List of lithium battery manufacturers, top ten lithium battery enterprises in China |
Back to list |
