What is power battery pack?

What is power battery pack?

First of all, we must understand the general distinction between lithium battery cells, lithium battery modules and lithium battery packs:
Battery cell: The most basic element that composes battery packs and battery packs. Generally, the voltage that can be provided is between 3v-4v;
Batteries (Batteries): a collection of multiple monomers to form a single physical module, providing higher voltage and capacity;
Battery pack (pack): It is generally composed of multiple battery packs. At the same time, a battery management system (bms) is also added,
which is the final product provided by the battery factory to the user.
Battery module
By assembling single cells, the cells are formed into different series and parallel connections through the bus bar, which can be screwed,
resistance welding, ultrasonic welding, ultrasonic aluminum wire welding and laser welding.
Considering the production yield, efficiency, and internal resistance of the connection point, laser welding is currently the first choice of many battery manufacturers.
 
Composition of PACK battery pack
It mainly includes several parts of battery module, mechanism system, electrical system, thermal management system and BMS.
Battery module
If the battery PACK is compared to a human body, then the module is the "heart", responsible for storing and releasing energy to provide power for the car.
Institutional System
Mainly composed of battery PACK upper cover, tray, various metal brackets, end plates and bolts, it can be regarded as the "skeleton" of battery PACK,
which plays a role in supporting, resisting mechanical shock, mechanical vibration and environmental protection (waterproof and dustproof) effect.
Electrical System
It is mainly composed of high-voltage jumper or high-voltage wiring harness, low-voltage wiring harness and relay. The high-voltage wiring harness
can be regarded as the "arterial blood vessel" of the battery PACK, which continuously transmits the power of the heart of the power battery system to
all required components, and the low-voltage wiring harness can be regarded as the "neural network" of the battery PACK, which transmits detection
signals and control in real time. signal.
Thermal management system
There are four main types of thermal management systems: air-cooled, water-cooled, liquid-cooled, and phase change materials.
Taking the water cooling system as an example, the thermal management system is mainly composed of a cooling plate, a cooling water pipe,
an insulation pad and a thermal pad. The thermal management system is equivalent to installing an air conditioner for the battery PACK.
BMS
Battery management system The battery management system can be regarded as the "brain" of the battery. It is mainly composed of CMU and BMU.
 
 
CMU: Cell monitor Unit is a single monitoring unit that is responsible for measuring battery voltage, current, temperature and other parameters,
as well as balancing functions. When the CMU measures these data, it transmits the data to the BMU through the battery "neural network" mentioned earlier.
BMU: Battery management Unit battery management unit.
Responsible for evaluating the data transmitted by the CMU, if the data is abnormal, protect the battery, issue a request to reduce the current,
or cut off the charge and discharge path to prevent the battery from exceeding the permitted use conditions, and also manage the battery power
and temperature. According to the previously designed control strategy, the parameters and states that need to be warned are judged,
and the warning is sent to the vehicle controller, and finally to the driver.
 


  


Contact Us 
Ivy | Sales Manager
Shenzhen AITOP Intelligent Equipment Co., Ltd.
Email：sales@aitop-group.com
Cel/Wechat:: 0086-18098989643
 

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