Light weight design
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In the field of power batteries, lightweighting is the core issue for enhancing energy efficiency and environmental performance. Lithium iron phosphate (LiFePO₄) start-stop batteries, with an energy density 34 times that of lead-acid batteries and a quarter of their weight, are reshaping the design logic of vehicle powertrains. Take the products of ENOV New Energy Company as an example. A 4Ah lithium battery (such as EN12ST040B) weighs only 0.9kg, while a lead-acid battery of the same capacity weighs as much as 3kg. The following analyzes the innovative significance of lightweight design from four dimensions: technical principles, data verification, application value, and environmental benefits.
I. Technical Principle: Dual Breakthroughs in Materials and Structures
The energy density of lithium iron phosphate batteries reaches 120,160 Wh/kg, which is 34 times that of lead-acid batteries (3,050 Wh/kg). The positive electrode is made of olivine-type LiFePO₄ material, and the negative electrode uses graphite. Both have a high specific capacity (the theoretical capacity of LiFePO₄ is 170mAh/g, while that of lead-acid batteries is only 30mAh/g), and can store more electrical energy per unit mass.
2. Optimization of electrode sheets and packaging processes
Ultra-thin electrode: The thickness of the electrode sheet is only 0.1mm (≥1mm for lead-acid battery plates), and the proportion of copper foil/aluminum foil current collector is less than 8%, reducing ineffective mass.
Compact layout: By adopting a stacked core design (such as the EN12BT series), space utilization is increased by 40% and shell weight is reduced by 50%.
3. Intelligent BMS weight loss collaboration
The built-in battery management system (BMS) integrates charge and discharge protection as well as temperature monitoring functions, eliminating the need for additional protective structures (such as thick lead plates and shock-absorbing brackets) required for lead-acid batteries and further reducing the overall weight.
Ii. Data Verification: Quantitative Comparison of Lightweight
According to the ENOV product specification sheet, the weight comparison of different models of lithium batteries and lead-acid batteries is as follows:
| Model | capacity (Ah) | Lithium battery weight (kg) | mediaaLead-acid battery weight (kg)n voltage (V) | Weight reduction ratio |
|---|---|---|---|---|
|
EN12ST040B |
4.0 |
0.9 |
3.0 (YT7BBS) |
70% |
|
EN12ST180B |
18.0 |
3.0 |
12.0 (YTX30LBS) |
75% |
|
EN12BT060B |
6.0 |
1.2 |
4.8 (YTX12BS) |
75% |
Comparison of measured performance
Energy density: Lithium battery (EN12ST180B) reaches 160Wh/kg, while lead-acid battery (YTX30LBS) is only 45Wh/kg.
Volumetric power density: 280W/L for lithium batteries and 80W/L for lead-acid batteries, with a 65% reduction in space occupation.
Iii. Application Scenarios: Multi-dimensional Value of Lightweight
1. Performance improvement of motorcycles and special vehicles
Acceleration performance: The motorcycle battery is reduced by 2kg (such as EN12ST040B replacing YT7BBS), which is equivalent to a 1.5% reduction in the vehicle's weight, and the 060km/h acceleration time is shortened by 0.3 seconds.
Range optimization: ATV vehicles are equipped with lithium batteries (EN12ST180B), reducing the curb weight by 9kg and lowering fuel consumption by 0.2L per 100 kilometers (measured data).
2. Energy conservation, emission reduction and environmental compliance
Carbon emission reduction: For every 100 kilograms of weight reduction in a vehicle, fuel consumption per 100 kilometers drops by 0.30.6 liters (EPA standard). Based on an annual driving distance of 20,000 kilometers, the use of lithium batteries can reduce CO₂ emissions by 120 kilograms each year.
Material environmental friendliness: Lithium batteries do not contain heavy metals such as lead and cadmium. Their production energy consumption is 60% lower than that of lead-acid batteries, and their carbon footprint throughout the entire life cycle is reduced by 50%.
3. Convenience of installation and maintenance
Space adaptation: The EN12BT series supports extended size design (for example, the EN12BT040B can adapt to Spaces of 150, 70, and 145mm), solving the pain point of fixed volume of lead-acid batteries.
Maintenance-free design: No need for liquid replenishment, anti-sulfidation and other operations, reducing labor maintenance costs.
Iv. Economic Analysis: Full Life Cycle Cost Advantage
| Project | Lithium iron phosphate battery | Lithium iron phosphate battery |
|---|---|---|
|
The cost of a single purchase |
approximately 2,000 |
approximately 800 |
|
Cycle life |
2000 times (capacity ≥90%) |
500 times (capacity ≤70%) |
|
The total cost over five years (including maintenance) |
2000×1 + 0 yuan =2000 yuan |
800×5 + 500 yuan =4500 yuan |
|
Fuel savings (5 years) |
approximately 1,800 yuan (10% reduction in fuel consumption) |
0 yuan |
Conclusion: Within a five-year cycle, the comprehensive cost of lithium batteries is 33% lower than that of lead-acid batteries, and the emission reduction benefits are significant.
Conclusion
The lightweight design of lithium iron phosphate start-stop batteries is a culmination of materials science, structural engineering and intelligent management. From the EN12ST series to the Bluetooth series, with a weight reduction ratio of 70% to 75% and an energy density 34 times higher, they not only redefine the performance standards of power batteries but also provide a practical solution for green transportation by reducing fuel consumption and carbon emissions. With the global increasing demands for energy efficiency and environmental protection, lightweight lithium batteries are bound to become the core driving force for vehicle power upgrades.
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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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