What Does Battery Pack Mean?

The battery pack means the welding assembly of the battery pack, which refers to the series or parallel connection of each battery cell through the welding equipment for welding and fixing, plus the battery protection board, the battery fixing bracket and the battery casing and other accessories to assemble, and finally It becomes a process of using a battery pack that can be directly connected to an electric device and used. What does lithium battery pack mean? What is battery pack PACK? What are the requirements for PACK lithium battery pack assembly? Let's take a look at it below.

1. What is a lithium battery PACK?

Battery PACK generally refers to assembled batteries, which mainly refers to the processing and assembly of lithium battery packs. It mainly combines battery cells, battery protection boards, battery connection sheets, label papers, etc. into products required by customers through the battery PACK process. Battery PACK is now mainly concentrated in the lithium battery pack PACK factory, which has its own PACK structure design, PACK electronic design and PACK production workshop, and can carry out independent development and design according to customer needs, through battery solutions, battery specifications, batteries After the samples meet the customer's PACK lithium battery customization requirements, the PACK production line in the PACK workshop will be processed, and the products will be shipped after passing the quality inspection.

2. understand lithium battery cells, lithium batteries and lithium battery packs

Lithium battery cell: The most basic element that composes battery packs and battery packs. Generally, the voltage that can be provided is between 3v-4v;

Lithium battery pack (Batteries): a collection of multiple monomers to form a single physical module, providing higher voltage and capacity;

Lithium battery pack (pack): It is generally composed of multiple battery packs. At the same time, battery management system (bms) is also added, which is the final product provided by the battery factory to the user. It is the lithium battery that everyone often talks about.

3. battery PACK composition

PACK includes battery pack, bus bar, flexible connection, protection board, outer packaging, output (including connector), barley paper, plastic bracket and other auxiliary materials together to form PACK.

4. the characteristics of lithium battery PACK

There are complete functions and can be directly applied; the variety of types, the same application requirements can be realized by multiple PACKs.

Lithium battery pack PACK requires batteries to have a high degree of consistency (capacity, internal resistance, voltage, discharge curve, life).

The cycle life of the lithium battery pack PACK is lower than that of a single battery.

Use under limited conditions (including charging, discharging current, charging method, temperature, humidity conditions, vibration, force level, etc.)

Lithium battery pack PACK protection board requires charge equalization function.

High-voltage, high-current battery pack PACK (such as electric vehicle batteries, energy storage systems) requires communication buses such as battery management system (BMS), CAN, and RS485.

Lithium battery packs have higher requirements for chargers. Some requirements communicate with BMS. The purpose is to make each battery work normally, fully utilize the energy stored in the battery, and ensure safe and reliable use.

5. lithium battery PACK process flow

The PACK of the lithium battery is realized in two ways. One is laser welding, ultrasonic welding or pulse welding. This is a commonly used welding method. The advantage is that it has good reliability, but it is not easy to replace. The second is the contact through the elastic metal sheet. The advantage is that there is no need for welding and the battery is easy to replace. The disadvantage is that it may lead to poor contact.

Well, the above is the basic knowledge of lithium battery pack PACK, I hope it can help everyone. At the same time, here are the differences between bms manufacturers, battery cell manufacturers and battery pack manufacturers:

1. A BMS manufacturer refers to a manufacturer that designs and manufactures battery pack management systems. It implements the function of the battery protection board and does not necessarily have the ability to produce or pack battery cells;

2. Battery cell manufacturers refer to the manufacturers that can produce single battery cells, such as common cylindrical batteries, square aluminum shell batteries and soft-packed lithium batteries like mobile phone batteries. These types of batteries are collectively referred to as batteries. Of course, it does not necessarily have bms manufacturing or pack capabilities;

3. A battery pack manufacturer is a battery manufacturer that has the ability to assemble batteries, bms, battery fixing brackets, and battery casings into batteries that can be used directly. Similarly, it does not necessarily have the ability to produce or pack battery cells; such Most of the battery manufacturers complete the finished product by customizing the batteries from the battery manufacturers and customizing the battery protection board from the BMS manufacturers to complete the finished product, which is similar to the manufacturers of processing materials.

Of course, there are some battery manufacturers that are relatively strong. For example, FIRSTEK, as a lithium battery manufacturer with strong comprehensive strength, can provide customers with customized services that integrate battery cell + bms + structural design, and prepare and manufacture from the requirements of battery cell attributes. To design and manufacture the suitable application of BMS, then to the structural design of the battery pack, to the final battery PACK, it is completely completed independently to ensure the quality of the battery and allow customers to use it with confidence.