Xiaomi introduced a revolutionary new technology Solid-state battery pack that offers superior mechanical strength and stability by replacing the liquid-state electrolyte with a solid-state electrolyte.
In laboratory tests, the technology of battery Xiaomi’s solid-state drive has reached three notable milestones: energy density greater than 1000 Wh/L, a 20% improvement in low-temperature discharge performance, and a significant increase in the pass rate of puncture experiments.
Energy density exceeds 1000 Wh/L, driving advances in battery material selection
The first great benefit of batteries solid state is its highest energy density. Currently, the chemistry used to build batteries has been a great challenge for the industry, and increasing energy density has proven difficult.
Theoretically, the ideal material for the negative electrode is lithium metal, as it has two to three times the storage capacity of current silicon and oxygen cathodes, resulting in a significant jump in battery energy density. .
To ensure the safety of these batteries, an inorganic diaphragm must be used to prevent lithium dendrites from penetrating and causing short circuits.
While the practical application of lithium metal negative electrodes remains difficult and is not yet ready for mass production, laboratory tests have shown that solid-state batteries allow battery power densities to exceed 1000Wh/L.
In a modded Xiaomi 13, Xiaomi can pack a whopping 6000 mAh capacity into its compact body, significantly extending battery life with this technology.
20% improvement in low temperature discharge for reliable winter performance
Another great benefit of solid-state batteries is their better performance at low temperatures.
The liquid electrolyte in traditional batteries has a high viscosity at low temperatures, hindering the ability to transport lithium ions and causing a drastic 60% drop in lithium conductivity, which has a huge impact on the performance of the battery. battery in winter.
By replacing liquid electrolytes with a solid-state material, the battery maintains the necessary lithium conductivity even at low temperatures.
In our environment Xiaomi Labsthe solid state battery has demonstrated a more than 20% improvement in performance compared to normal batteries at -20°C, providing reliable operation in cold climates and conditions.
Reliable protection with higher pass rates in puncture tests
While puncture tests have traditionally yielded low pass rates for conventional non-solid-state batteries, accidents such as short circuits and combustion can occur during puncture tests.
These incidents arise when the positive current collector foil comes into contact with the active material at the negative end during impact, causing a temperature rise in the battery which in turn increases the risk of combustion.
Solid-state batteries have seen notable improvements in their resistance to puncture tests. By coating the positive electrode with a solid electrolyte ceramic, the solid electrolyte layer forms a downward curve to enclose the positive current collecting fluid and separate it from the negative electrode.
This blocks any contact between the positive and negative electrodes during piercing, greatly increasing the pass rate of the prick test and providing a higher level of safety in use.
With the advantages of high battery density, low temperature tolerance, and ultra-safe features, innovative solid-state batteries set a new benchmark in the battery industry.
Xiaomi is committed to exploring cutting-edge battery technology innovations, aiming to deliver superior user experiences in this new era.
