Summary of Key Points
As concerns about the range of new energy vehicles (NEVs) diminish and public attention to the road damage and energy consumption caused by vehicle weight increases, lightweighting has once again become a focal point for competition among automakers. This trend was temporarily overshadowed during the early stages of electrification, when manufacturers focused on adding large batteries and advanced features. Numerous companies such as Xingtu, Geely, NIO, Lotus, and Lantu are pursuing lightweighting through various approaches, including the use of different chassis materials, integrated electric drive systems, and innovative structural designs. However, they face challenges such as high technical barriers, substantial costs, and consumer perceptions that heavier vehicles equate to greater safety.
Why Has Lightweighting Become a Focus Again?
In the early days of electrification, automakers prioritized adding large batteries and luxuries like refrigerators, televisions, and spacious interiors to address range concerns, which led to increasingly heavy vehicles (many NEVs weighing over 2 tons). However, recent developments have changed this:
1. Improved battery technology: Advances in energy density and the widespread availability of charging infrastructure mean that relying solely on larger batteries is no longer necessary to extend range.
2. The issue of vehicle weight becomes evident: Heavy vehicles not only consume more fuel but also have poorer handling, can damage road surfaces (with jokes like "how much damage can a vehicle over 2 tons cause?"), and increase mechanical wear and tear.
3. Maturing consumer preferences: Consumers are now considering factors such as handling and long-term usage costs, recognizing the value of lightweighting.
How Automakers Are Achieving Lightweighting
Different automakers are adopting unique strategies to reduce weight, focusing on technological innovations rather than simply cutting features:
- Xingtu ES: Uses a full-aluminum chassis (Flyfish 2.0), which reduces the weight by 60 kg in the "spring-loaded" parts (wheelsets and suspensions) that come into direct contact with the ground. There’s a saying in the industry: "1 kg lighter in the spring-loaded components equals 10 kg lighter in the rest of the vehicle," significantly improving handling.
- Geely: Integrates multiple electric drive components into a single system (Thunder 16-in-1), making the entire system over 15% lighter than industry standards. The Galaxy TT uses aerospace-grade aluminum wheels to balance weight and durability.
- NIO L60: Employes high-strength lightweight materials, ultra-thin battery packs, and silicon carbide electric drives, reducing the vehicle's weight by more than 300 kg compared to similar models.
- Lotus: Has achieved extreme weight reduction; for example, its new For Me model is 500 kg lighter. The CEO emphasizes that "it’s better to reduce weight rather than add features," especially in sports car categories, but this philosophy also applies to SUVs.
- Lantu: Makes every effort to minimize weight, such as using laser-welded door rings, which make the body 10% lighter while being 30% stronger. Their all-aluminum chassis is also 30% lighter than steel ones.
The Challenges of Lightweighting
Despite its apparent simplicity, lightweighting poses significant challenges:
1. Complex technical requirements: It involves a comprehensive approach that includes architecture design, material selection, production processes, and supply chain coordination.
2. High costs: Reducing weight by even 1 kg can cost around $1,000 per vehicle. While it’s easy to reduce the weight from 2 tons to 1.9 tons, further reductions incur higher costs.
3. Balancing safety and weight: Safety cannot be compromised; for instance, Lantu’s door ring technology makes the vehicles lighter yet stronger. Lotus’ F1-inspired electric drives weigh only 15 kg, significantly less than typical 350 kW motors, although they are more expensive.
Consumer Perceptions
One of the biggest barriers to the adoption of lightweighting is the common belief that heavier vehicles are safer:
- Misconceptions: Many people think that heavier vehicles are more stable.
- A dilemma for automakers: They hesitate to remove unnecessary features for fear of losing market share. For example, luxury extras like refrigerators and large interiors increase weight but are popular with consumers.
- Change requires time: Automakers need to educate consumers about the benefits of lightweighting, such as reduced inertia during sudden stops and resource efficiency.
The Public Benefits of Lightweighting
Lightweighting extends beyond its role as a competitive advantage for automakers:
- Reduced road damage: Heavy vehicles put more strain on roads, leading to increased maintenance costs over time.
- Improved energy efficiency and emissions: Lighter vehicles can travel longer on the same amount of battery power or use smaller batteries, reducing the consumption of resources like lithium and cobalt.
- Environmental benefits: Lower energy consumption means less electricity usage, which is beneficial for carbon reduction goals.
In summary, lightweighting is an inevitable trend in the development of NEVs. For it to become a market standard, automakers need to overcome technical challenges and lower costs, while consumers must also change their perceptions. In the future, "lightweight and strong" may become as important a criterion for evaluating NEVs as "long range."