Lithium-ion batteries are widely used, from civil digital, communication products to industrial equipment to military power supply. Different products need different voltages and capacities. Therefore, there are many applications of lithium-ion batteries in series and parallel. The application batteries formed by adding protective circuits, shells and outputs are called PACKs. PACK can be a single battery, such as cell phone batteries, digital camera batteries, MP3, MP4 batteries, etc., or a series-parallel combination battery, such as laptop batteries, medical equipment batteries, communication power supply, electric vehicle batteries, standby power supply, etc.
1. Composition of lithium-ion battery PACK:
PACK consists of battery pack, protective board, outer package or shell, output (including connector), key switch, power indicator, EVA, barley paper, plastic support and other auxiliary materials. The external characteristics of PACK are determined by the application. There are many kinds of PACK.
2. The Characteristics of Lithium Ion Battery PACK
Diversity of species. There are many kinds of PACKs for the same application requirement.Battery PACK requires a high degree of consistency (capacity, internal resistance, voltage, discharge curve, life).
The PACK protection board of lithium ion batteries requires charging equalization function.
The cycle life of PACK battery pack is lower than that of single battery.
Use under limited conditions (including charging, discharging current, charging mode, temperature, humidity, vibration, stress level, etc.)
High voltage and high current battery pack PACK (such as electric vehicle battery and energy storage system) requires equipped with battery management system (BMS), CAN, RS485 and other communication buses.
Battery PACK has high requirements for charger. Some requirements communicate with BMS in order to make each battery work normally, fully exert the energy stored in the battery, and ensure safe and reliable use.
3. Design of Lithium Ion Battery PACK
Fully understand the use requirements, such as application environment (temperature, humidity, vibration, salt spray, etc.), use time, charging, discharge mode and electrical parameters, output mode, life requirements, etc.
Select qualified batteries and protective circuit boards according to operation requirements.
Meet the requirements of size and weight.
The packing is reliable and meets the requirements.
The production process is concise.
Optimize the scheme.
Minimize the cost.
Detection is easy to implement.
4. Cautions for the use of lithium-ion batteries
Don’t immerse the battery in water and seawater. Please put it in cool and dry environment if no using.
Do not use and leave the battery near a heat source as fire or heater
Being charged, using the battery charger specifically for that purpose
Don’t reverse the positive and negative terminals
Don’t connect the battery to an electrical outlet directly.
Don’t discard the battery in fire or heater.
Don’t connect the positive and negative terminal directly with metal objects such as wire.
Do not transport and store the battery together with metal objects such as necklaces, hairpins.
Please recharge the battery every three months when it is on hold. And according to the storage temperature.