Rapid Prototyping Accelerates Innovation in New Energy Vehicle Battery Structure——BYD Battery Enclosure Lightweighting Project
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With the explosive growth of global demand for new energy vehicles (NEVs), battery performance has become a core competitive factor in the industry. BYD battery maker planned to develop a next-generation lightweight battery enclosure, requiring a 20% weight reduction while maintaining structural strength, with design validation to be completed within 6 weeks. Traditional mold development involves long lead times and high costs, so the client opted for rapid prototyping through machining. As a leading domestic rapid prototyping supplier, Brightstar undertook this critical project.
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- Tight Timeline: Full-cycle validation from design to testing had to be completed within 6 weeks (vs. 12+ weeks for traditional tooling), with only 2 weeks allocated to Brightstar for producing 5 prototype units.
- Precision Requirements: Seal surface tolerance of ≤±0.01mm to prevent battery leakage
- Material Performance: Prototypes had to mimic mass-production aluminum alloy (6061-T6) mechanical properties (tensile strength ≥310MPa).
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Brightstar deployed 5-axis precision machining (DMG MORI NX Series) with high dynamic accuracy (±0.01mm), directly processing aluminum workpiece to deliver the first prototype within 5 days, passing FAI inspection. Through simulation-driven design (e.g., ANSYS stress analysis), the internal rib structure was iteratively optimized, achieving a 23% weight reduction (from 8.5kg to 6.5kg). Post-machining, prototypes underwent anodizing to simulate mass-production anti-corrosion performance, passing 500-hour salt spray testing (GB/T 10125-2021) without failure.
With Brightstar’s rapid prototyping, the project was delivered in 4 weeks (33% ahead of the client’s 6-week target and 66% faster than traditional tooling methods). Prototype unit cost was $1,200 compared to $50k for tooling, achieving an 88% upfront cost reduction while eliminating mold modification risks.
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According to the customer's actual test data, the enclosure weight reduction (2kg) contributed to a 15kg total battery system lightweighting, improving vehicle range by 1.2%.Combined with battery energy density optimization and thermal management upgrades, total range increased by 8%.
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Rapid prototyping enables efficient, cost-effective transformation of automotive innovation into reality, compressing development cycles and de-risking mass production.
