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Successful Case Study: High-Precision Integrated Die-Cast Aluminum Alloy Motor Housings for Geely Automobile

Views: 0     Author: Site Editor     Publish Time: 2026-07-09      Origin: Site

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I. Case Overview

Our company has been deeply engaged in the R&D, production, and precision machining of automotive motor housings for 20 years. We are a specialized manufacturing enterprise in China focusing on core electric drive components for both new energy vehicles and traditional vehicles.

With long-term technical accumulation, continuous process iteration, and extensive quality control experience, the company has become a core strategic supporting supplier for Geely Automobile. We provide high-precision integrated die-cast aluminum alloy motor housings in batches for three major automobile brands under Geely Group: Geely, Zeekr, and Volvo.

With an extremely lightweight design, strict air-tightness standards, and top-level machining precision, the products have reached a leading level in China in terms of overall performance. They have successfully broken the overseas monopoly in the field of high-end automotive motor housings and helped Geely Automobile fully realize import substitution for this core component. This provides strong support for cost reduction, efficiency improvement, independent and controllable supply chains, and vehicle performance upgrades.

II. Project Cooperation Background

As the global automotive industry rapidly evolves toward electrification, premiumization, and lightweight design, the electric drive system, as the “heart” of a vehicle, directly determines vehicle power performance and driving experience through its stability, energy efficiency, and durability.

As a core load-bearing component of the electric drive system, the motor housing performs multiple key functions, including supporting the motor structure, sealing internal components, conducting and dissipating heat, and providing vibration damping and protection. Its machining precision, air-tightness, and lightweight level directly affect motor operating efficiency, energy consumption, and service life.

Previously, the high-precision motor housings used in Geely Group’s high-end models, especially Zeekr pure electric models and the full range of Volvo models, relied heavily on imported overseas components. These overseas products involved high procurement costs, long delivery cycles, delayed customization response, unstable supply chains, and high after-sales maintenance costs, which greatly restricted Geely Automobile’s model iteration speed and cost optimization potential.

At the same time, traditional split welded motor housings have defects such as multiple weld seams, poor sealing performance, insufficient structural rigidity, and excessive weight. They are unable to meet the R&D and production requirements of a new generation of high-speed, high-efficiency, and highly integrated electric drive systems.

Against this industry background, Geely Automobile urgently needed a domestic supplier with core technical capabilities, stable mass production capacity, and long-term supporting experience to achieve localized substitution of high-end motor housings. With 20 years of technical accumulation in the motor housing segment, a mature integrated die-casting process, and a complete precision machining system, our company successfully passed Geely Group’s rigorous supplier qualification review and became one of its core supporting partners, fully undertaking the localized supply of motor housings for the three major brands.

III. Accumulated Core Strengths of the Company

Since its establishment, our company has always focused on the specialized field of automotive motor housings. Following a development path of specialization, refinement, and high-end manufacturing, we have been deeply engaged in the industry for 20 years and have completed multiple rounds of process innovation and technological upgrading.

The company has built a full-chain production system covering raw material selection, integrated die-casting forming, precision CNC machining, air-tightness testing, and finished product delivery, forming differentiated core competitiveness.

In terms of technology R&D, the company has established professional teams for material research, structural design, and process optimization. We have long focused on improving aluminum alloy die-casting material formulations and developing integrated forming processes. We have accumulated extensive product design parameters and mass production experience, enabling customized housing development for motors with different power types and output levels. The company can work closely with vehicle manufacturers’ R&D teams and complete product iteration and upgrading in parallel with vehicle development.

In terms of manufacturing, the company has introduced large-scale intelligent die-casting units, high-precision CNC machining equipment, and fully automated inspection production lines. This enables one-piece integrated forming of motor housings and eliminates the traditional split welding process, greatly reducing process errors and assembly defects.

In terms of quality control, the company has established a full-process traceable inspection system. From incoming raw materials and in-process inspection to finished product delivery, every step is strictly controlled to ensure the precision and stability of each product. The products fully meet the strict quality standards of Geely, Zeekr, and Volvo.

IV. Core Product Technical Advantages

The high-precision integrated die-cast aluminum alloy motor housings supplied to Geely Group in this project rely on the company’s mature core technologies. In three key indicators — lightweight performance, air-tightness, and machining precision — the products have reached a leading level in China.

They perfectly meet the technical requirements of different vehicle models under the three major brands and are suitable for multiple power architectures, including hybrid and pure electric systems.

1. Extreme lightweight design to improve vehicle energy efficiency

The products use high-strength special aluminum alloy materials combined with an integrated topology-optimized structural design. They are formed in one step through large-scale die-casting equipment, eliminating unnecessary welding and splicing structures.

Compared with traditional split steel housings, the weight reduction effect is significant, with a single-piece weight reduction of 15% to 20%. The lightweight housing design effectively reduces the curb weight of the vehicle, lowers energy consumption during driving, improves the driving range of new energy vehicles, and enhances the power response of fuel vehicles.

This is fully in line with the automotive industry’s trend toward lightweight and low-carbon development, helping Geely’s full range of models achieve energy consumption optimization and performance upgrading.

2. Ultra-high air-tightness to ensure stable motor operation

The air-tightness of a motor housing is the core guarantee for dust prevention, waterproofing, oil resistance, and oxidation prevention. It directly determines the service life and operating stability of the motor.

By optimizing the die-casting forming process and precision sealing machining process, our company eliminates the weld seam defects found in traditional welded housings. The product air-tightness testing pass rate is close to 100%.

The housings can effectively resist the intrusion of moisture, dust, and oil contamination in complex driving environments. They are suitable for the demanding operating conditions of high-voltage oil-cooled motors, ensuring long-term stable operation under high loads. This significantly reduces the probability of after-sales vehicle failures and improves overall vehicle reliability and durability.

3. Ultra-high machining precision to meet high-end electric drive standards

Relying on high-precision CNC machining technology and digital production control, the dimensional accuracy and geometric tolerance of key assembly areas have reached a top level in China.

The housings feature excellent fitting performance and extremely high assembly precision, perfectly matching the assembly requirements of high-end electric drive systems used by Geely, Zeekr, and Volvo.

The high-precision housing structure can effectively reduce motor vibration and noise during operation, improve motor power output efficiency, and fully meet the requirements of high-end vehicle models for quietness, comfort, and power performance. It also fills a technical gap in China’s high-end integrated die-cast motor housing sector.

V. Project Implementation and Application Results

Relying on mature technical strength and stable mass production capability, our company successfully completed R&D implementation, sample verification, and batch production for Geely Group’s motor housing project.

The products are now widely supplied for Geely family passenger vehicles, Zeekr high-end pure electric models, and Volvo models built to global quality standards. They have achieved large-scale vehicle installation across multiple series under the three major brands. Supply stability, product qualification rate, and delivery efficiency have all been highly recognized by Geely Group.

During project implementation, our company fully leveraged the advantages of a local enterprise, including fast response, strong customization capability, and a complete service system. We closely matched Geely’s vehicle model iteration schedule and quickly responded to various requirements such as product optimization, process upgrading, and batch delivery.

This effectively solved the previous industry pain points associated with imported components, including long delivery cycles, difficult customization, and delayed after-sales response. At the same time, localized mass production significantly reduced Geely Group’s component procurement costs and supply chain management costs, shortened vehicle production and delivery cycles, and provided strong support for improving the automaker’s market competitiveness.

VI. Core Project Value: Achieving Import Substitution in a Key Field

The core industry value of this in-depth cooperation with Geely Group lies in the successful realization of full import substitution in the field of high-end integrated die-cast automotive motor housings.

Before this project, the core technologies for high-precision aluminum alloy motor housings used in high-end Volvo and Zeekr models had long been monopolized by overseas component giants. Most domestic companies were limited by die-casting processes, precision machining technologies, and quality control systems, making it difficult for them to meet the access standards of high-end automakers. This field had long faced a critical technological bottleneck.

With 20 years of focused experience in this specialized segment, our company has broken through core technical barriers such as high-end integrated die casting, ultra-high air-tightness control, and micron-level precision machining. The independently developed and manufactured motor housings fully match and even surpass imported overseas products in overall performance, quality stability, and adaptability, completely breaking the monopoly of overseas brands in the high-end automotive motor housing market.

This import substitution not only helps Geely Group eliminate dependence on imported overseas components, improve the independent controllability of its core component supply chain, reduce supply chain risks, and significantly lower the production cost of core components for high-end models; it also creates favorable conditions for improving the cost-performance competitiveness and market expansion of Geely, Zeekr, and Volvo models.

At the same time, the project verifies the technical strength of domestically produced high-end core electric drive components and sets a benchmark for the high-end and localized development of China’s automotive components industry.

VII. Summary and Outlook

The high-precision integrated die-cast aluminum alloy motor housing supply project for Geely Automobile is an important achievement of our company’s 20 years of dedication to a specialized field and its commitment to technological innovation. It is also a typical successful case of domestic automotive core components breaking through technical barriers and achieving import substitution.

In the future, our company will continue to focus on the core field of automotive motor housings. We will further increase investment in technology R&D and process upgrading, optimize product performance in lightweight design, precision, and integration, and further improve large-scale mass production capability and customized service capability.

At the same time, we will continue to deepen our strategic cooperation with Geely Group, closely following the automaker’s development layout in new energy vehicles and high-end models. We will help more vehicle models achieve localized upgrading of core components and continuously empower the high-quality development of China’s automotive components industry and the independent upgrading of local supply chains.

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