Technological breakthrough and future evolution of electrolyte
main content
As the "blood" of the lithium battery, the electrolyte undertakes a dual mission in the cold start scene of the motorcycle: it not only maintains the high-speed migration of lithium ions in the extreme cold of -30℃, but also carries the pulse current of more than 30C at the start moment. Its composition design and performance optimization directly determine the low temperature start-up ability, cycle life and high temperature safety of the battery. This article will analyze the use of electrolyte from the technical level and reveal how it supports the reliable start of motorcycle in extreme conditions.
Technical breakthrough under extreme working conditions
1. Low temperature start-up performance enhancement
Solvation structure reconstruction: The weak solvation ability of EA reduced the activation energy of Li⁰ desolvation from 0.65eV to 0.45eV, and increased the ion migration rate at -30℃ by 2 times.
Interfacial kinetics optimization: 1% vinyl fluoride carbonate (FEC) promoted the formation of LiF-rich SEI film, and the interfacial impedance decreased from 150Ω·cm² to 50Ω·cm² at -20℃.
Pre-lithiation technology: 0.1% lithium ferrocene is added to the electrolyte to compensate for the loss of 10%-15% active lithium at low temperature.
2. High rate pulse discharge support
Ion transport acceleration: the three-dimensional porous electrode and the low-viscosity electrolyte cooperate to reduce the concentration polarization by 40% at the current density of 300A/cm²;
Fast response of electrical double layer: The high migration number of LiFSI (0.45) shortens the electrical double layer establishment time to 0.1ms to meet the 5-second cold start requirement.
3. High temperature safety protection mechanism
Self-repairing SEI film: the additives containing dynamic disulfide bonds repair the cracks of SEI film at 80℃, and the cycle life is extended to 800 times;
Phase change flame retardant: adding 5% perfluoropolyether (PFPE), the gel barrier is formed when the temperature exceeds 120℃, and the oxygen index is increased from 18% to 32%.
Future technology evolution direction
Local high concentration electrolyte: through the DMC/HFE solvent to construct a local 3mol/L high concentration zone, -40℃ ion conductivity to maintain 5mS/cm, while withstanding 4.5V high voltage;
₇(PO₄)₃ ₃ (LATP)₃ fast ion conductor layer was formed in situ. The interface impedance was reduced to 10Ω·cm².
Ai Formulation Optimization: Predicting additive combinations based on quantum chemical calculations reduces development cycles from 3 years to 8 months.
Conclusion
From the basic system of lithium hexafluorophosphate to the intelligent self-healing electrolyte, the "ion highway" of motorcycle starter batteries is undergoing a disruptive upgrade. In the future, with the breakthrough of material computing and synthesis technology, the electrolyte will not only be a medium that passively responds to environmental changes, but also become an intelligent system that actively regulates the behavior of the battery. This microscopic chemical revolution is injecting new potential energy into the evolution of the power of the two-wheeled vehicle.
START-STOP LITHIUM battery
Enov start-stop battery is designed to provide excellent performance for high-demand start-stop vaehicles. It adopts the third-generation intelligent lithium platform architecture to achieve technological breakthroughs in core indicators such as cycle life, environmental adaptability and energy density. Compared with the traditional lead-acid battery system, the energy efficiency is increased by 210%, the cycle life is extended by 8-10 times, and the monthly self-discharge rate is controlled within 3%. Enov's unique low-temperature battery technology makes a breakthrough in achieving stable output in the whole climate domain from -30℃ to 65℃, maintaining more than 90% of the effective capacity release under extremely cold conditions (-30℃), and maintaining 90% of the capacity in high temperature environments (65℃).
The start-stop battery series products cover the mainstream voltage platform of 12V/24V/48V, and support flexible configuration of LFP (lithium iron phosphate) and NCM (lithium nickel cobalt manganese oxide) dual-material system. All models adopt modular design to support customization of different model specifications. Enuo engineering and technical team to provide full cycle technical service support, if you need, please contact us.
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