Lithium battery as an important power source of electric vehicles, its assembly process and quality control are particularly important. This article will introduce the whole assembly process of new energy lithium battery in detail, including raw material preparation, cell assembly, module assembly, battery pack test and other links, helping readers understand the key steps and precautions of lithium battery assembly.

1. Raw material preparation
   first of all, the first step of lithium battery assembly is to prepare various raw materials, including positive electrode material, negative electrode material, electrolyte, diaphragm, etc. The quality of these raw materials has an important impact on the final battery performance, so it is necessary to strictly control the procurement and quality inspection of raw materials.

2. Cell assembly
   cell assembly is the core link of lithium battery assembly, usually including winding and laminated assembly methods. In the assembly process of cell, it is necessary to stack the positive and negative electrode materials, diaphragm and other layers according to the design requirements, and then roll or stack them to form the basic structure of cell. This step requires high precision and expertise to ensure cell performance and safety.

3. Module assembly
   after Cell is assembled, you need to install the cell into the module and connect the positive and negative poles of the cell to form the battery module. During module assembly, attention should be paid to maintaining the stability and conductivity of the connection to ensure the normal operation of the battery module.

4. Battery pack test
   after the module is assembled, the battery pack needs to be strictly tested, including capacity test, cycle life test, high and low temperature performance test, etc. These tests can evaluate the performance and stability of battery pack to ensure that they meet the design requirements and safety standards.

5. Packaging and finished product inspection
   finally, battery pack that have passed the test need to be packaged and finished product inspected. It is necessary to ensure battery pack sealing and safety during the packaging process to prevent battery leakage or short circuit. Finished product inspection includes visual inspection, functional testing, etc. to ensure that battery pack meets the quality standards.

6. Quality control and traceability
   in the whole process of lithium battery assembly, quality control is a crucial link. It is necessary to establish a perfect quality management system to ensure that every process meets the standards and requirements. Meanwhile,Quality tracing is required to record the data and test results of each process in order to find and solve problems in time.

7. Environmental protection and safety
   in the process of lithium battery assembly, attention should be paid to environmental protection and safety issues. Reasonable disposal of waste, taking fire prevention measures and ensuring the safety and health of employees are essential tasks. At the same time, abide by relevant laws, regulations and standards to ensure that the production process meets environmental protection and safety requirements.

The assembly of new energy lithium batteries is a complicated and critical process, and every link needs to be strictly controlled to ensure the performance, safety and stability of the batteries. Quality management, environmental protection and safety measures are aspects that cannot be ignored in the process of lithium battery assembly. Only by fully grasping every detail can we produce high-quality and reliable new energy lithium battery products.