Meaning
Specialized mechanical components designed with a sinusoidal geometry provide consistent axial force within the confined spatial envelope of a battery housing. Including wave springs in a cell stack ensures that a constant pressure is maintained on the electrodes as they expand and contract during use. They offer a compact alternative to traditional coil springs in applications where vertical space is limited.
Pressure Regulation
Spring constant selection ensures the application of the specific load required to maintain low contact resistance without crushing the sensitive battery components. Consistent pressure prevents the formation of voids at the interface of solid-state batteries and helps suppress the growth of lithium dendrites.
Space Efficiency
Flat design characteristics allow for a lower height when fully compressed compared to other spring types. This efficiency enables the design of smaller, more energy-dense battery packs by reducing the volume occupied by inactive mechanical hardware.
Mechanical Durability
High-strength alloys withstand millions of small compressions and decompressions over the life of the battery. Material selection using stainless steel or specialized metals ensures that the spring does not lose its tension or fail due to fatigue during the operation of the device. This durability is necessary for maintaining the long-term electrochemical performance and safety of the battery system throughout its entire service life.
