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After placing an order for a power lithium battery, the production process usually includes the following stages, each of which is crucial and affects the quality and performance of the final product:

Raw material procurement and inspection

Firstly, manufacturers need to purchase various raw materials, including positive electrode materials, negative electrode materials, electrolytes, separators, etc. These raw materials have a significant impact on the performance and safety of batteries. After procurement, strict raw material inspection is required to ensure that the raw materials meet the requirements and there are no quality issues.

Preparation of positive and negative electrodes

The positive and negative electrodes are the core components of a battery, and their preparation process has a significant impact on battery performance and cycle life. The positive electrode is usually composed of a lithium nickel cobalt manganese oxide framework, conductive agent, and binder, while the negative electrode is usually composed of graphite, conductive agent, and binder. During the preparation process, it is necessary to control the material ratio, tablet pressing process, and baking process to ensure that the positive and negative electrodes have good electrochemical performance and structural stability.

Assembly and packaging

After the preparation of the positive and negative electrodes, it is necessary to assemble and package the battery. This step usually involves assembling the positive and negative electrode plates with separators, electrolytes, etc., and connecting them with aluminum foil or copper foil, and finally packaging them into a battery. During the assembly process, it is necessary to strictly control the environmental conditions to avoid foreign objects entering and contamination inside the battery, ensuring the integrity and safety of the battery packaging.

Charge and discharge test

The assembled battery needs to undergo charge and discharge tests to verify its performance and safety. Charge and discharge testing usually includes static performance testing and dynamic performance testing. Through testing, key performance indicators such as battery capacity, internal resistance, and cycle life can be evaluated to ensure that the battery meets the requirements.

Finished product inspection and packaging

Batteries that have passed the charge and discharge tests will undergo finished product inspection, including visual inspection, capacity testing, safety testing, etc. Finished product inspection can ensure product quality and consistency. Subsequently, qualified batteries will be packaged, typically using anti-static and shock resistant packaging, to ensure that the product is not damaged during transportation.

Finished product quality control and traceability

After production is completed, the manufacturer needs to establish a finished product quality control system and carry out traceability management for the finished products. This includes recording the production process parameters, finished product inspection results, packaging information, etc. of each battery for use in after-sales service and product quality issue tracing.

The production steps of power lithium batteries include raw material procurement and inspection, positive and negative electrode preparation, assembly and packaging, charge and discharge testing, finished product inspection and packaging, finished product quality control and traceability. Each stage needs to be strictly controlled to ensure that the quality and performance of the final product meet the requirements.

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