The difference between battery cell, battery module and battery

The difference between battery cell, battery module and battery

In the field of batteries, sometimes we talk about batteries, sometimes we talk about cells, sometimes we talk about modules, sometimes we talk about battery packs.So how do these terms differ from each other?

The fact is that the battery is a general term, while the cell, module, and battery pack are different phases in the application of the battery.

In the battery pack, for the sake of safe and effective management of hundreds of single battery cell, the battery cells are not randomly placed in the power battery shell, but are placed in an orderly manner according to modules and packs.

The smallest unit is the battery cell, a group of battery cells can form a module, and several modules can form a package.

Now let's look at the specific performance of each stage.

Battery cell: Battery cell is the smallest unit of battery and also the storage unit of electric energy. It must have a high energy density to store as much electric energy as possible, so that electric vehicles can have a longer range.In addition, the life of the cell is also the most critical factor. The damage of any cell will lead to the damage of the whole battery pack.

Module: When multiple battery cells are encapsulated in the same housing frame and connected to the outside by unified boundaries, a module is formed.For example, 350 module, 390 module, 590 module in the market.

Battery pack: When several modules are controlled or managed together by BMS and thermal management system, this unified whole is called battery pack.

So back to what we used to say about batteries.In life, when we talk about batteries, sometimes we're talking about battery packs, and sometimes we're talking about batteries.For example, when we talk about toy car batteries and No. 5 batteries, we are talking about battery cells, while when we talk about laptop computer batteries and new energy vehicle batteries, we are talking about battery packs.