Knowledge of Lithium Battery PACK Process
Lithium batteries are widely used, ranging from civilian digital and communication products to industrial equipment to military power supplies. Different products require different voltages and capacities. Therefore, there are many cases where lithium-ion batteries are used in series and parallel. The application battery formed by protecting the circuit, casing, and output is called PACK.
PACK can be a single battery, such as mobile phone batteries, digital camera batteries, MP3, MP4 batteries, etc., or a series-parallel combination battery, such as laptop batteries, medical equipment batteries, communication power supplies, electric vehicle batteries, backup power supplies, etc.
1. PACK composition:
PACK includes battery pack, protective board, outer packaging or shell, output (including connector), key switch, power indicator, and auxiliary materials such as EVA, barley paper, and plastic bracket to form PACK. The external characteristics of PACK are determined by the application. There are many types of PACK.
| S/N | Component | Application | Remark |
| 1 | Lithium Battery Cell | Provide energy. The core component of PACK converts chemical energy into electric energy when discharging, and electric energy into chemical energy when charging. One of the main materials. | Multiple types, multiple models, necessary |
| 2 | PCB/BMS | Protecting the battery to work in a safe environment is an important and necessary component of PACK. | According to the requirements of use, necessary |
| 3 | Shell | Packaging carrier for lithium battery packs. Protect the battery from external force and beauty, easy to install on battery application equipment, one of the main materials | Multiple styles, determined by the customer |
| 4 | Key | Battery output switch. Equipped with battery car battery. | Optional |
| 5 | Nickel belt | Complete the parallel and series of batteries. Pass current. | Necessary |
| 6 | Wire | Connect the battery output. | Necessary |
| 7 | Battery indicator | Indicate the remaining battery energy, divided into voltage indication mode and integral calculation indication mode | |
| 8 | Barley paper | Isolation and insulation. Separate the battery from other components. | |
| 9 | EVA | Isolation and shock absorption. Or do filling to fix the battery position. | |
| 10 | Bracket | Shape the battery. Arrange the batteries in a certain order and facilitate heat dissipation. | New horn |
| 11 | High Temperature Polyimide Tape | Isolation and insulation. Isolate the parts that need to be isolated. | Optional |
| 12 | Output connector | The battery output interface realizes the matching connection with the user end. | Optional |
| 13 | Lable | Display battery pack parameters and precautions for use. | Optional |
| 14 | PVC | Battery packaging. Shrink molding. | Optional |
| 15 | Transfer circuit board | For battery positioning, series and parallel combination. | Optional |
| 16 | Fuse | Over-current protection to prevent abnormal high current from damaging the device | Optional |
3. Features of PACK
★It has complete functions and can be directly applied.
★ Variety of types. There are multiple PACKs for the same application requirement. .
★Battery pack PACK requires batteries to have a high degree of consistency (capacity, internal resistance, voltage, discharge curve, life).
★The cycle life of the battery pack PACK is lower than that of a single battery.
★Use under limited conditions (including charging, discharging current, charging method, temperature, humidity, vibration,
Strength, etc.)
★The PACK protection board of the lithium battery pack requires a charge equalization function.
★High-voltage, high-current battery pack PACK (such as electric vehicle batteries, energy storage systems) requires battery management system (BMS),
Communication bus such as CAN and RS485.
★The battery pack PACK has higher requirements for the charger, and some requirements communicate with the BMS, the purpose is to make each battery normal
Work, fully utilize the energy stored in the battery, and ensure safe and reliable use.
4. Design of PACK
★Fully understand the use requirements, such as the application environment (temperature, humidity, vibration, salt spray, etc.), use time, charging, release
Electrical mode and electrical parameters, output mode, life requirements, etc.
★Select qualified batteries and protection circuit boards according to the requirements of use,
★Meet size and weight requirements.
★The packaging is reliable and meets the requirements.
★Simplified production process.
★The program is optimized.
★Minimize cost.
★The detection is easy to realize.
5. Cautions for use!!
★Do not put into fire or use near heat source!!
★Do not use metal to directly connect the output positive and negative poles together.
★Do not use outside the battery temperature range.
★Do not squeeze the battery with force. .
★Use a special charger or charge according to the correct method.
★Please recharge the battery every three months–times when the battery is shelved. And place it at the storage temperature.
Post time: Nov-04-2020
