Preparation process of energy storage battery

What is battery manufacturing process?

Figure 1 introduces the current state-of-the-art battery manufacturing process, which includes three major parts: electrode preparation, cell assembly, and battery electrochemistry activation. First, the active material (AM), conductive additive, and binder are mixed to form a uniform slurry with the solvent.

What are the design objectives of a battery?

Typical design objectives are high energy density, high power density, low production cost, long lifetime and safety. Battery cell formation is part of cell conditioning. Cell conditioning also includes various quality test steps and quality sorting.

How to improve cell fabrication reproducibility in battery study?

In order to further improve the cell fabrication reproducibility in the battery study, research groups and institutes should try to involve more auto- or semi auto- equipment in the cell fabrication process to largely eliminate the system errors by manual operation process.

Why does gas evolution occur during battery cell formation?

Significant gas evolution occurs during battery cell formation. The amount and composition of the gas is influenced by the formation protocol, the active material, the electrolyte composition, and cell design. Gas formation can be a limiting factor for fast formation strategies, especially with thick electrodes and larger cell formats.

How can a solvent recovery process be used in battery manufacturing?

Thus a solvent recovery process is necessary for the cathode production during drying and the recovered NMP is reused in battery manufacturing with 20%–30% loss (Ahmed et al., 2016). For the water-based anode slurry, the harmless vapor can be exhausted to the ambient environment directly.

How can battery manufacturing improve energy density?

The new manufacturing technologies such as high-efficiency mixing, solvent-free deposition, and fast formation could be the key to achieve this target. Besides the upgrading of battery materials, the potential of increasing the energy density from the manufacturing end starts to make an impact.