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Lithium ion battery manufacturers interpret the production process and procedures of lithium ion batteries. Mixing, coating, winding and testing are important production processes of lithium ion batteries. The process technology of lithium ion batteries is very strict and complex. The safety performance of lithium ion battery products is directly related to the life and health of consumers. The production and manufacturing of natural lithium ion batteries have high requirements for the performance, accuracy, stability and automation level of equipment.

Lithium-ion battery manufacturers interpret the production process and procedures of lithium-ion batteries

Power lithium battery and energy storage battery put forward higher technical requirements for battery consistency and quality control in lithium-ion battery production line. It is necessary to introduce industrial robot technology objectively. In China, most of the robot system integration is concentrated in the field of automobile industry, machine bed loading and unloading and other large-scale contact manufacturing production lines. In the production process of lithium-ion battery, the important processes to go through are as follows:

In the important processes of lithium-ion battery manufacturing, lamination, welding and cutting are three consecutive processes, and automatic or semi-automatic special machines are used. Before the transformation, the connection and circulation between the three processes need manual intervention, which can not achieve continuous production, labor intensity is high, and can not guarantee the consistency of battery products.

1. Laminator

It is important to separate the positive and negative electrode materials of the lithium-ion battery with a diaphragm to prevent the short circuit of the electrode piece. The positive and negative electrode pieces are pre-loaded into the cartridge box of the electrode piece, and the counting lamination of the positive and negative electrode pieces is carried out alternately by the manipulator. After the lamination is completed, the mechanical arm will place the wire on the lamination table tooling, and the production line workers will take it away for the next process.

2. Ultrasonic welding machine

The worker holds the finished laminated battery and sends the pole lug into the welding position. Through the high-frequency elastic vibration of the acoustic system, the positive and negative pole lugs of the laminated battery can be welded under the clamping purpose of static pressure between the workpieces. Under pressure, the metal surfaces will rub each other to form the fusion between molecular layers, which has the advantages of fast, energy-saving, high fusion strength, non-sparking and close to cold processing.

3. Cutting machine

The lithium ion battery pole lug to be cut is manually fed into the cutting machine knife edge, and the cutting knife is driven to cut the protruding part of the pole lug by controlling the cylinder movement. The cutting process needs to ensure the symmetry of the pole lugs on both sides, and ensure the accuracy and quality of the temperature.

Production process and links of lithium ion battery

1. Slurry mixing is an important part of lithium-ion battery equipment. The positive paste of lithium-ion battery is composed of adhesive, conductive agent, positive material, etc., and the negative paste is composed of adhesive, graphite carbon powder, etc; The preparation of positive and negative electrode slurry includes the mutual mixing, dissolution and dispersion of liquid and liquid, liquid and solid materials; The quality of slurry dispersion directly affects the quality and performance of lithium-ion batteries.

2. Coating determines the consistency and superiority of the battery and plays a technical role in battery manufacturing. No matter what kind of battery (such as cylindrical or square) is produced, the coating machine used in manufacturing is the same; Different types of batteries need to be equipped with different types of winding machines.

3. In addition to lithium ion battery winding machines, there are also capacitor winding machines, textile winding machines, etc. According to the operation mode of the machine, it can be divided into manual winding machine, semi-automatic winding machine and full-automatic winding machine.

4. The importance of testing items has become increasingly prominent. Lithium-ion batteries are easy to burn or explode due to short circuit, overcharge and other reasons, and will form a finished battery with a protective plate in application; In applications with high energy density, lithium-ion batteries need to be series-parallel combined to form lithium-ion batteries, which are managed by the battery management system (BMS).

It can be seen that the production process of lithium ion battery is relatively long, including more than 50 processes, and more than 50 kinds of equipment are required. In recent years, lithium-ion battery production has developed towards integration, integration and automation. The lithium battery automation production line provides standardized products for customers. The traditional development method cannot cope with the rapidly changing needs of customers.

It can be seen that the production process of lithium ion battery and all production links in the process are closely related to the product quality and safety. Each link in the production process of lithium ion battery should be strictly and carefully managed, so as to improve the safety performance of lithium ion battery products.

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