Welding technology of wire for lithium battery welding

 The selection and use of wires is very critical in the manufacture of lithium batteries. At present, the common welding method is laser welding to complete.

1. Welding method

The two ends of the wire are first cauched with a laser ripple, and then the electrode sheet is pre-cut holes in the hole through the wire handle, and the wire and the electrode sheet can be welded together with the laser.

2. Precautions

(1) Select the appropriate wire diameter and material. When selecting wires, it is necessary to consider their conductive properties and whether they can meet the requirements of lithium battery manufacturing.

(2) The laser temperature should be adjusted according to the wire data. Different data of the wire, welding temperature is different, the need to adjust according to the detailed situation.

(3) The laser welding time should not be too long to prevent wire deformation and weaken mechanical strength.

Second, lithium battery lead welding technology

In the consumption of lithium batteries, the welding of the lead and the connection between the lead and the electrode is a very important step. The appropriate welding method can make the lead and the electrode plate strictly separated, so as to ensure the stability of the lithium battery performance and prolong the life.

1. Welding method

The common method of lead welding is laser welding. The detailed operation process is as follows:

(1) Prepare the wire: select the appropriate lead and prepare the two leads required for laser welding.

(2) Prepare the electrode sheet: according to the consumption request, the electrode sheet is made into the required shape and size.

(3) Positioning: positioning on the electrode sheet, and then using laser welding head welding.

2. Precautions

(1) Laser welding needs to adhere to a certain welding speed to prevent excessive heating and deformation.

(2) In the selection and preparation process of the lead, it is necessary to consider the application environment and application needs of lithium batteries, so as to confirm the appropriate data and diameter.

Lithium battery lead welding

Third, the connection of lithium battery electrode sheet

Electrode connection is an important step in the manufacturing process of lithium battery. The connection is not tight or the quality is not good, which will directly lead to the performance and life of the lithium battery. The connection of electrodes is mainly based on two methods: heat sealing and laser welding.

1. Laser welding method

Compared with the heat sealing method, the laser welding method can make the data at the joint be better disposed of at high temperature, so that the welding quality is higher and the battery life is extended. At the same time, the storage time of laser welding is longer, which is suitable for battery products requiring long-term storage.

3. Precautions

(1) The quality of welding directly affects the performance and life of the battery, so we must pay attention to the welding temperature, heat sealing time and pressure and other process parameters when connecting the electrode.

(2) Select the appropriate thickness of the battery and control the thickness deviation of the battery.

Fourth, the advantages of lithium battery laser welding

Laser welding is one of the welding technologies in lithium battery consumption, which has the characteristics of fast, high precision and high quality. Detailed table now:

(1) Fast: the welding speed is very fast, which can improve the consumption efficiency.

(2) Saving data: the welding points are small and accurate, which can save data.

(3) High precision: high precision welding points, suitable for high-precision requests.

(4) High reliability: high welding strength, long battery life.