Abstract
Lithium battery is widely used, from civil digital and communication products to industrial equipment to special equipment are used in batches, different products need different voltage and capacity, so lithium ion battery series and parallel use a lot, lithium battery through the installation of protection circuit, shell, output and the formation of the application battery is called P
Lithium batteries are widely used in batches from civil digital and communication products to industrial equipment to special equipment, etc. Different products require different voltages and capacities, so there are many cases of lithium ion batteries in series and parallel use. The application battery formed by adding protection circuit, shell and output of lithium batteries is called PACK. PACK can be a single battery, such as cell phone battery, digital camera battery, MP3, MP4 battery, etc., or a series and parallel combination battery, such as laptop computer battery, medical device battery, communication power supply, electric car battery, backup power supply, etc.
1. Composition of lithium battery PACK:
PACK consists of battery PACK, protection plate, outer packaging or shell, output (including connector), key switch, power indicator, EVA, highland barley paper, plastic support and other auxiliary materials. PACK's external features are determined by the application. There are many kinds of packs.
2. Production process of lithium battery PACK:
Low temperature lithium iron phosphate battery 3.2V 20A
Low temperature lithium iron phosphate battery 3.2V 20A
-20℃ charging, -40℃ 3C discharge capacity ≥70%
Charging temperature: -20~45℃
- Discharge temperature: -40~+55℃
-40℃ supports maximum discharge rate: 3C
-40℃ 3C discharge capacity retention rate ≥70%
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3. Features of lithium battery PACK
Has a complete function, can be directly applied.
The variety of species. There are multiple packs for the same application requirement.
Battery PACK requires 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 charge, discharge current, charging mode, temperature, humidity conditions, vibration, stress degree, etc.)
The lithium battery PACK protection panel must provide the charge balancing function.
High-voltage and high-current battery packs (such as electric vehicle batteries and energy storage systems) must be equipped with communication buses such as the battery management system (BMS), CAN, and RS485.
The battery PACK has high requirements on the charger. Some requirements are communicated with the BMS, so that each battery can work normally, fully play the energy stored in the battery, and ensure safe and reliable use.
4. Design of lithium battery PACK
Fully understand the application requirements, such as application environment (temperature, humidity, vibration, salt spray, etc.), service time, charging, discharging mode and electrical parameters, output mode, life requirements, etc.
Select qualified batteries and protection circuit boards according to use requirements.
Meet the requirements of size and weight.
The packaging is reliable and meets the requirements.
The production process is simple.
Solution optimization.
Minimize the cost.
Detection is easy to implement.
5, lithium battery use precautions!!
Do not put into the fire or use near the heat source!!
Do not use metal to connect the output positive and negative terminals directly together.
Do not use it outside the battery temperature range.
Do not squeeze the battery.
Use a special charger or charge it correctly.
Please recharge the battery every three months when it is idle. And store according to storage temperature.
