An Automatic Hydraulic Plate Press (often referred to as a programmable laboratory hydraulic press) removes the manual physical effort and human variability from electrode calendering, lamination, and composite sheet molding. Unlike a manual press where the operator must pumps a lever and constantly watch a gauge, an automatic system utilizes an integrated electric motor, hydraulic pump, and closed-loop feedback controller. The operator simply inputs a digital recipe—specifying exact target force, dwell time, and temperature—and the machine executes it with high precision.

For advanced battery research (such as high-loading dry electrodes, sodium-ion polyanions, or solid-state cell stacks), automatic presses provide distinct technical advantages over manual setups: (1) Elimination of Pressure Drift: During hot pressing, as materials compress or undergo thermal expansion, a manual press experiences pressure drift. An automatic press uses a continuous digital pressure sensor; if the force drops even slightly below the target value, the motorized pump automatically engages to maintain a rock-solid, constant pressure. (2) Controlled Force Loading Rates: Some delicate cell configurations or ceramic electrolyte pellets (like LLZO or sulfide matrices) will crack if pressure is slammed on too quickly. Automatic presses allow you to program a slow ramp-rate (e.g., increase pressure at 0.5 metric tons/minute). (3) Multi-Segment Programming: Advanced recipes require complex profiles—such as pre-heating under low pressure, ramping up to peak compaction force for a set dwell time, and then stepping down incrementally.

References:

J. Zhang, et al., Investigation on mechanical and microstructural evolution of lithium-ion battery electrode during the calendering process, Powder Technology, 2022, 409, 117828

M. Abdollahifar, et al., Insights into Influencing Electrode Calendering on the Battery Performance, Adv Energy Mater., 2023, 13, 2300973.