Solution

    Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloy as the positive/negative electrode material and a non-aqueous electrolyte solution. They are mainly divided into two categories: lithium metal batteries and lithium-ion batteries. The lithium battery manufacturing process is divided into front-end processes (electrode manufacturing), mid-end processes (cell assembly), and back-end processes (formulation and packaging)

After the front-end processes complete the manufacturing of the (positive and negative) electrode sheets, the electrode sheets are assembled with the separator using winding or stacking methods to form a basic battery cell. The cell then undergoes hot pressing for shaping. Hot pressing is a crucial step in battery cell forming; it optimizes the tight bonding of the internal battery structure through heating and pressure, thereby improving battery performance and safety

Battery hot pressing process

The wound or stacked battery cells are placed on a template. The pressure of the booster cylinder and the temperature of the template are set. Then, under certain pressure and temperature, the upper and lower templates shape the battery cells, achieving a consistent cell thickness. This reduces the elasticity of the cells, improves the core assembly yield, and ensures the consistency of the finished cell thickness. Under suitable process parameters, thicker cells contain almost no air, and the separator and electrode sheets are tightly bonded together, while loose cells can be transformed into a hard block

Solution

In the battery hot-pressing process, maintaining a stable temperature between the upper and lower heating plates places extremely high demands on the temperature controller. A good controller can significantly improve the battery yield. Our AU7 693H series high-capacity temperature controller is particularly suitable for this scenario. Customers not only require a large number of heating channels but also need temperature control accuracy within 1°C. Our AU7 693H temperature controller perfectly meets these needs

Application effect

Enhanced battery performance and safety

      The SM693H-ECT temperature control coupler features 8 channels and 50ms fast data acquisition, resulting in more efficient and precise temperature control. The temperature controller manages the template temperature, achieving better contact between the positive and negative electrode materials and the separator and electrolyte to facilitate cell formation, thereby accelerating lithium-ion transport efficiency, reducing internal resistance, and improving the battery's energy density, power performance, and cycle life, while also enhancing overall battery safety