Lithium battery production process flow chart detailed explanation

1, according to the internal material, lithium batteries are usually divided into two categories:

Lithium battery: the lithium battery is generally use lithium manganese dioxide as positive pole material, metal or its alloy metal anode materials for batteries, the use of water electrolyte solution.

Lithium ion battery: the lithium ion battery is generally use lithium alloy metal oxide anode material, graphite as the cathode material, using non-aqueous electrolyte battery.

Although the high energy density lithium battery theoretically can reach 3860 w/kg, its nature was not enough stability and not charging, so I can't as the repeated use of the power battery. And because lithium ion batteries are capable of being recharged, be as the main power battery development. But because with the different elements to form the positive materials in various aspects of the performance difference is very big, lead to disputes in the path of the anode materials industry.

Usually we say that the most main power battery lithium iron phosphate batteries, manganese acid lithium battery, cobalt acid lithium batteries as well as the ternary lithium battery(3) nickel cobalt manganese

2, according to utility cent; Also can be divided into two categories:

First is the digital battery, is our everyday use of mobile phones, tablets, mobile power and so on, these are all belong to the digital type battery.

Is the second is power battery, Tesla, BYD new energy electric vehicles, drones and other products is the use of batteries, these batteries required instant current is very big, digital battery can't satisfy the instantaneous large current, so this class is also called high-magnification batteries, price is digital batteries are expensive.

3, according to the shell material, can be divided into three categories:

The first category, steel battery shell, just as its name implies is the shell is steel.

The second category, aluminum shell battery, the same shell is aluminum material.

The third class, polymer battery, the shell is a kind of polymer material, mostly in the form of silver, one of the few companies do is black, the industry to become black.

4, according to the shape and three categories:

First, cylindrical battery, the use of a lot, like 18650266, 50 and so on, the general combination, combination less can be used as a digital products, like the early laptop, generally 8 18650, mobile power supply, the combination of one to five or six, and tesla's series parallel combination of more than 7000, 18650.

Second, square battery, this class is mostly polymer battery, because the polymer ductility is very good, can make a lot of modelling, high width can be adjusted freely, most digital products are now using this type of battery.

Third, special-shaped battery, it is some strange cell, the shape of the battery will form a complete set according to the requirements of products, such as popular now smart apparel products, such as intelligent hand ring is a ring, so the battery is also made into ring.

Lithium battery production process flow diagram of the explanation

The structure of the lithium battery

Lithium battery structure is divided into five parts, namely, the positive and negative, the diaphragm, the electrolyte and the shell.

(1) lithium battery anode containing active material, conductive agent, solvent, adhesive, such as matrix material.

(2) lithium battery cathode contains active substances, such as adhesives, solvent, substrate material.

(3) the lithium battery diaphragm

(4) lithium battery electrolyte

(5) lithium battery shell contains steel shell, aluminum shell, cover plate, pole ear, insulating tape and other hardware.

Lithium battery production process flow diagram of the explanation

Lithium battery production flow chart

Lithium battery production process of each manufacturer is not very consistent, but mostly from these links, the following figure:

Lithium battery production process flow diagram of the explanation

Specifically as follows: material preparation, homogenate, coating, rolling, cutting - roasting - winding - into the shell - laser welding - baking - filler - filling, sealing, cleaning, aging, full inspection, warehousing, delivery.

Lithium battery production process

Objectively, lithium battery production process is divided into three stages, one is the plate making, second is batteries, battery assembly is three. In lithium battery production process, the sheet production is the foundation, batteries production is the core, the battery assembly relations to the lithium battery products quality. Lithium battery production process specific link contains the anode paste, anode paste, the positive, negative, steel shell assembly, filler and testing and packing and so on.

Lithium battery production process flow diagram of the explanation

Lithium battery production process

As is known to all, lithium battery production process is very complex, lithium ion battery product safety performance, after all, high and low is directly related to life and health of consumers and the natural lithium batteries on the performance of the equipment in production and manufacturing, precision, stability, and automation level have higher requirements. With lithium battery production process of the preparation of electrode paste, for example, the link in the most front end link, also is the most important link of the whole production process, after all, electrode paste mixing dispersion process on the quality of the product effect is greater than 30%.What is the reason?

The reason is that the positive and negative electrode of lithium-ion batteries slurry preparation includes liquid and liquid, liquid and solid materials mixing, between dissolved, dispersed and a series of process, along with temperature, viscosity, environment, etc. In positive and negative electrode paste, particle dispersion and uniformity of active material directly affect the movement of lithium ion in battery electrodes, electrode paste is scattered quality directly affect the product performance of lithium-ion batteries.

Lithium battery production process, therefore, every production process and product quality and safety are closely linked, lithium battery production process each link must strictly manage, thin, so as to improve product safety performance of lithium-ion batteries.

The page contains the contents of the machine translation.