Ultra-high discharge rate and fast start-up capability
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In the vehicle start-stop system, the instantaneous discharge capacity of the battery directly determines the response speed and reliability of engine startup. Lithium iron phosphate (LiFePO₄) start-stop batteries, with their outstanding performance of up to 100C instantaneous discharge rate, have completely broken through the technical bottlenecks of traditional lead-acid batteries (AGM/EFB) and become the core of the new generation of efficient energy solutions. The following analysis is conducted from three aspects: technical principles, measured data, and practical application scenarios.
I. Technical Principles: From Material Properties to Structural Innovation
Lithium iron phosphate batteries use nanoscale carbon-coated cathode materials in combination with graphite anodes to form low-impedance ion transport channels. The porosity of its electrodes has been optimized to 35% to 40%, significantly enhancing the diffusion rate of lithium ions and thus supporting ultra-high rate discharge.
2. Ultra-thin electrode sheet design
The thickness of the battery electrode sheet is only 1/10 of that of traditional lead-acid batteries (about 0.1mm), shortening the ion migration path, reducing the internal resistance (typical value ≤1.5mΩ), and achieving explosive current output.
3. Optimization of electrolyte formula
The electrolyte mixed with lithium fluoride salts (e.g. LiPF₆) and carbonate solvents maintains a high ionic conductivity (>10mS/cm) within the range of 30°C to 65°C to ensure discharge stability at extreme temperatures.
Ii. Measured Data: Performance Verification at a discharge rate of 100C
According to the test report in the product specification sheet (see the "LITHIUM MOTORCYCLE STARTER BATTERY" section), lithium iron phosphate batteries demonstrate overwhelming advantages in the following scenarios:
1. Normal temperature pulse discharge test
Test conditions: Charge at 0.5C constant current and constant voltage to 3.68V, with a cut-off current of 0.05C;
260C@1 Second pulse discharge: Instantaneously release 260 times the rated capacity current (such as 4Ah battery output 1040A), the lower end voltage drops to only 1.811V (much higher than the critical failure voltage 1.5V of lead-acid battery);
190C@2 Second pulse discharge: High current output for 2 seconds, voltage stabilized at 1.879V, to meet the requirements of multiple consecutive starts of the internal combustion engine.
2. Low-temperature extreme performance
20°C environmental test: After the battery was left to stand for 4 hours and discharged with an 80C pulse for 3 seconds, the low-end voltage still reached 2.0V (under the same conditions, the voltage of lead-acid batteries is usually lower than 1.8V and the engine cannot be started).
30°C cold start: Capacity retention rate >85%, no attenuation of pulse current output, completely solving the problem of starting in winter.
3. Comparison of high-temperature stability
Test after 7 days of storage at 65°C: The capacity retention rate of lithium iron phosphate batteries was 91.34%, and the increase in internal resistance was only 7.63%.
Traditional lead-acid batteries: At high temperatures, the evaporation of the electrolyte accelerates, with capacity attenuation exceeding 30%, and sulfation of the plates is prone to occur.
Iii. Practical Application: Dual Enhancement of Efficiency and Reliability
According to the test report in the product specification sheet (see the "LITHIUM MOTORCYCLE STARTER BATTERY" section), lithium iron phosphate batteries demonstrate overwhelming advantages in the following scenarios:
1. Frequent start-stop scenarios
Under urban traffic congestion conditions, vehicles can start and stop up to 2,030 times per hour. The 100C discharge rate of lithium iron phosphate batteries can ensure that each startup time is shortened to 0.3 seconds (0.51 seconds for lead-acid batteries), reducing fuel waste and mechanical wear.
2. Compatibility with high-power devices
It supports high-load devices such as high-compression ratio engines and turbocharging systems, with an instantaneous current output of up to 1080A (EN12RT180B model), far exceeding the limit value of lead-acid batteries (typically <600A).
3. Emergency response capability
When the battery is in a state of low power, lithium iron phosphate batteries can intelligently allocate the remaining power through BMS to prioritize the start-up function (such as the rapid wake-up technology of the "Reboot series"), avoiding permanent damage to traditional batteries caused by deep discharge.
Conclusion
The 100C ultra-high discharge rate of lithium iron phosphate start-stop batteries is not only a breakthrough in technical parameters, but also a revolutionary upgrade to the vehicle's power system. From laboratory data to actual road conditions, its rapid response capability, adaptability to extreme environments and long life characteristics are all significantly superior to those of traditional lead-acid batteries. With the acceleration of the automotive electrification process, lithium iron phosphate batteries are bound to become the core standard equipment for start-stop systems, hybrid and special vehicles.
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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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