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Inverter Housing CNC Machining for Electric Vehicles
Inverter housings are precisely machined thermal management enclosures that protect power electronics while dissipating heat from IGBT modules and control circuits that convert DC battery power to AC motor power in electric vehicles. At Zintilon, we are leaders in CNC machining of inverter housings, which competitors are die-casting and integrated cooling channel fabrication to achieve cooling, EM shield, SE for dependable in passenger EVs, commercial vehicles, and high power electric drivetrains.
- Machining for complex housing geometries and cooling interfaces
- Tight tolerances up to ±0.008 in
- Precision milling, die-casting & thermal finishing
- Support for rapid prototyping and full-scale production
- ISO 9001-certified electric vehicle component manufacturing
Trusted by 15,000+ businesses
Why New Energy Companies
Choose Zintilon
Increased Productivity
Engineers get time back by not dealing with immature supply chains or lack of supply chain staffing in their company and get parts fast.
10x Tighter Tolerances
Zintilon can machine parts with tolerances as tight as+/ - 0.0001 in -10x greater precision compared to other leading services.
World Class Quality
Zintilon provides aerospace parts for leading aerospace enterprises, verified to be compliant with ISO9001 quality standard by a certified registrar. Also, our network includes AS9100 certified manufacturing partners, as needed.
From Prototyping to Mass Production
CNC machining for inverter housings and power electronics enclosures is provided in Zintilon to EV manufacturers, inverter suppliers, a nd automotive electronics integrators around the globe.
Prototype Inverter Housings
Get your prototypes made for the inverter housings with the right details. Assess the thermal performance, galvanometric shielding, and the IP67 enclosure tightness and claim it for mass production.```html
Key Points:
Key Points:
- Rapid prototyping with high precision
- Tight tolerances (±0.008 in)
- Test design, heat dissipation, and EMI protection early
EVT – Engineering Validation Test
Fast and accurate inverter housing prototypes with thermal and electrical requirements ensure potential issues are identified early for a smoother transition to mass EV production.
Key Points:
Key Points:
- Validate prototype functionality
- Rapid design iterations
- Ensure readiness for production
DVT – Design Validation Test
Use different materials to validate the inverter housing’s dimensions and thermal performance to ensure design accuracy for optimal cooling before mass production.
Key Points:
Key Points:
- Confirm design integrity and thermal capacity
- Test multiple materials and configurations
- Ensure production-ready performance
PVT – Production Validation Test
For the inverter housings, validate the feasibility of large-scale production, including potential manufacturing challenges, to ensure consistency and efficiency before mass production.
Key Points:
Key Points:
- Test the large-scale production capability
- Detect and fix process issues early
- Ensure consistent part quality
Mass Production
For the production of high-quality inverter housings that are thermally optimized with precision and efficient processing, while ensuring reliable power conversion and on-time delivery for manufacturers of EVs and other electronics.
Key Points:
Key Points:
- Consistent, high-volume production
- Precision machining for thermal efficiency
- Fast turnaround with strict quality control
Simplified Sourcing for
the New Energy Industry
Our aviation industry parts manufacturing capabilities have been verified by many listed companies. We provide a variety of manufacturing processes and surface treatments for aerospace parts including titanium alloys and aluminum alloys.
Explore Other New Energy Components
Browse our complete selection of CNC machined components for new energy applications, crafted for precision and long-term reliability. From turbine housings and mounting brackets to battery enclosures and thermal management components, we deliver solutions tailored to the evolving needs of renewable energy and clean technology industries.
Electric Vehicles Inverter Housings Machining Capabilities
Inverter Housing CNC Machining for Electric Vehicles. Machinists in automotive electronics have integrated with our CNC machining centers and high-pressure die-casting to achieve this. All components are engineered for high heat dissipation, low thermal resistance, and EMC compliance, starting from liquid-cooled IGBT base plates to integrated motor controller enclosures and DC-DC converter housings with optimized fin arrays.
For thermal batteries, we provide die-casting, precision CNC milling, sealing groove machining, and EMI shielding coating. This is combined with thermal cycling and EMI tests. All crafted inverter housings meet the standards of the automotive industry EMC, including thermal AEC-Q200, ISO 7637, CISPR 25, and are made of aluminum die-cast alloys (A380, ADC12), aluminum extrusions (6061-T6), magnesium alloys (AZ91D), or copper-aluminum composites to ensure compliance and exceptional thermal conductivity.
For thermal batteries, we provide die-casting, precision CNC milling, sealing groove machining, and EMI shielding coating. This is combined with thermal cycling and EMI tests. All crafted inverter housings meet the standards of the automotive industry EMC, including thermal AEC-Q200, ISO 7637, CISPR 25, and are made of aluminum die-cast alloys (A380, ADC12), aluminum extrusions (6061-T6), magnesium alloys (AZ91D), or copper-aluminum composites to ensure compliance and exceptional thermal conductivity.
Aerospace
Materials & Finishes
Materials
We provide a wide range of materials, including metals, plastics, and composites.
Finishes
We offer superior surface finishes that enhance part durability and aesthetics for applications requiring smooth or textured surfaces.
Specialist Industries
You are welcome to emphasize it in the drawings or communicate with the sales.
Materials for Inverter Housings
Our CNC machine shop works with many different materials for Inverter Housings used in Electric Vehicles. With over 10 different thermally conductive metals and die-cast alloys, we can do high-quality automotive rapid prototyping and specialty power electronics enclosure manufacturing, focusing on automotive-grade thermal efficiency.
High machinability and ductility. Aluminum alloys have good strength-to-weight ratio, high thermal and electrical conductivity, low density and natural corrosion resistance.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.003 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Steel is a strong, versatile, and durable alloy of iron and carbon. Steel is strong and durable. High tensile strength, corrosion resistance heat and fire resistance, easily molded and formed. Its applications range from construction materials and structural components to automotive and aerospace components.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.001 mm (routing)
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Stainless steel alloys have high strength, ductility, wear and corrosion resistance. They can be easily welded, machined and polished. The hardness and the cost of stainless steel is higher than that of aluminum alloy.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Titanium is an advanced material with excellent corrosion resistance, biocompatibility, and strength-to-weight characteristics. This unique range of properties makes it an ideal choice for many of the engineering challenges faced by the medical, energy, chemical processing, and aerospace industries.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Highly resistant to seawater corrosion. The material’s mechanical properties are inferior to many other machinable metals, making it best for low-stress components produced by CNC machining.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Brass is mechanically stronger and lower-friction metal properties make CNC machining brass ideal for mechanical applications that also require corrosion resistance such as those encountered in the marine industry.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Few metals have the electric conductivity that copper has when it comes to CNC milling materials. The material’s high corrosion resistance aids in preventing rust, and its thermal conductivity features facilitate CNC machining shaping.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Due to the low mechanical strength of pure magnesium, magnesium alloys are mainly used. Magnesium alloy has low density but high strength and good rigidity. Good toughness and strong shock absorption. Low heat capacity, fast solidification speed, and good die-casting performance.
Price
$ $ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Iron is an indispensable metal in the industrial sector. Iron is alloyed with a small amount of carbon – steel, which is not easily demagnetized after magnetization and is an excellent hard magnetic material, as well as an important industrial material, and is also used as the main raw material for artificial magnetism.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Let’s Build Something Great, Together
FAQs: Inverter Housings for Electric Vehicle Applications
Inverter housings are thermal management enclosures protecting IGBT power modules that dissipate 1 to 5 kilowatts of heat while converting 50 to 400 kilowatts of DC battery power to three-phase AC motor power at efficiencies of 95 to 98 percent. Types include liquid-cooled housings with integrated cooling channels achieving thermal resistance 0.05 to 0.15°C per watt for continuous 150 kilowatt operation, air-cooled enclosures with extruded fin arrays for power levels to 50 kilowatts, integrated three-in-one housings combining inverter, motor controller, and DC-DC converter in single package reducing mass by 30 percent, and specialty designs including silicon carbide (SiC) inverter housings operating to 200°C junction temperature, dual-motor controller enclosures for all-wheel-drive vehicles, and onboard charger integrated housings combining traction inverter with 11 to 22 kilowatt AC charging capability.
Aluminum die-cast A380 and ADC12 show excellent castability for complex geometries with integrated cooling passages and mounting features. They have thermal conductivities of 96 and 109 watts per meter-Kelvin, which enables efficient heat transfer. They also have electromagnetic shielding effectiveness exceeding 90 dB from 150 kHz to 1 GHz. They possess adequate strength to maintain structural integrity during vibration testing per ISO 16750-3. Moreover, they are cost-effective for high-volume production. Aluminum 6061-T6 extrusions have superior thermal conductivity of 167 watts per meter-Kelvin and better design flexibility, and are recyclable. Magnesium AZ91D has an adequate thermal conductivity of 51 watts per meter-Kelvin. It decreases the housing mass by 35 percent compared to aluminum. Copper-aluminum composites are used to provide targeted high-conductivity zones for the critical hot spots.
High-pressure die-casting makes it possible to create complex aluminum housings with integrated cooling channels and aluminum die-cast mounting bosses and achieve cycle times of 60 to 120 seconds. Precision CNC milling makes it possible to create mounting surfaces with flatness of 0.015 inches for IGBT module thermal interface surfaces, achieving contact resistance of 0.01°C-cm² per watt for 0.01 watts. Coordinate drilling and counterboring achieves he space of d-c. Concentric holes for coolant connections and mounting holes with position accuracy of ±0.008 inch. Groove machining achieves control of depth of material ±0.005 inch for the closing condition of the O-ring and IP67 rating for washers in a waterproof sealing system. Vacuum impregnation is used to seal porosity in die-castings. Anodizing or coating is applied for electromagnetic shielding and to prevent corrosion. Thermal interface surfaces are lapped to achieve a flatness of 0.010 inches and Ra of less than 1.6 microns.
We achieve IGBT mounting surface flatness of 0.015 inches across 100 to 300 cm2 areas for thermal interface compression of less than 0.1 mm, seal groove dimensions of ±0.005 inches for gasket compression to get IP67 water ingress protection, coolant port positions of ±0.008 inches for manifold alignment, overall housing dimensions of ±0.012 inches for vehicle mounting, wall thickness uniformity of ±0.010 inches to maintain thermal performance, and perpendicularity of 0.020 inches between mounting surfaces.
Yes, we perform rapid prototyping for EV inverters with thermal simulation for validating and measuring junction temperatures using infrared thermography. We conduct low-volume production for specialty vehicles and performance applications producing 100 to 5000 housings, and high-volume production for mass-market EVs producing hundreds to thousands of housings annually with full dimensional inspection using CMM equipment, thermal resistance testing with junction-to-coolant temperature measuring below 0.15°C per watt, IP67 water ingress testing per ISO 20653, EMI shielding effectiveness verifications per CISPR 25, vibration testing per ISO 16750-3, and material certifications including thermal conductivity verification and corrosion resistance per ISO 9227.
Yes, we perform rapid prototyping for EV inverters with thermal simulation for validating and measuring junction temperatures using infrared thermography. We conduct low-volume production for specialty vehicles and performance applications producing 100 to 5000 housings, and high-volume production for mass-market EVs producing hundreds to thousands of housings annually with full dimensional inspection using CMM equipment, thermal resistance testing with junction-to-coolant temperature measuring below 0.15°C per watt, IP67 water ingress testing per ISO 20653, EMI shielding effectiveness verifications per CISPR 25, vibration testing per ISO 16750-3, and material certifications including thermal conductivity verification and corrosion resistance per ISO 9227.
All components are manufactured under ISO 9001 quality management systems with complete material traceability, dimensional verification against design specifications, and compliance with automotive electronics standards including AEC-Q200 for passive components, ISO 7637 for electrical disturbances, CISPR 25 for electromagnetic compatibility, ISO 26262 for functional safety where required, and LV 124 for automotive electrical systems ensuring thermal management to maintain IGBT junction temperature below 150°C at ambient 40°C, IP67 sealing, and a service life of 10 years or 150,000 miles which corresponds to 5000 to 15,000 operating hours.
We offer several options, such as hard anodizing on aluminum, where we create a coating of 25 to 50 microns, which offers some wear resistance and electromagnetic shielding of more than 90 dB. Nickel-based conductive coating for enhanced EMI shielding that meets CISPR 25 standards, Powder coating at a thickness of 60 to 100 microns, and providing electrical insulation, precision IGBT mounting surfaces lapping to a flatness of 0.010 inches, and a finish of Ra below 1.6 microns, so that the thermal interface material can perform. For specialized treatment, we offer thermal spray coating with copper or aluminum for heat spreading, chromate conversion for corrosion protection, and hydrophobic coatings on cooling channels to serve as surfaces for enhanced flow to and through the channels.
For standard die-cast aluminum housings for passenger EV inverters, we require 12–18 business days to finish all the steps (casting, machining, and surface treatment) after the tooling is done, and for new die tooling development, the first production of it would take 10–14 weeks. For prototypes, we can use CNC machining from a billet, which we can finish in 10–14 days. This allows for quick thermal validation and EMC testing.
Absolutely! For example, we construct high-power units for commercial trucks and buses specializing in 300 to 500 kilowatt ranges. These units include thermal resistance of under 0.05°C per watt, and we build ultra-compact units for tighter applications above 40 kilowatt per liter power density. We also make lightweight magnesium enclosures for performance vehicles, which reduces mass by 35%. Other units include integrated three-in-one designs, which package the inverter, onboard charger, and DC-DC converter into one integrated 20-kilogram package, and custom-built silicon carbide inverter housings that function under 200°C ambient for underhood mounting. Other designs include dual inverter housings for all-wheel-drive powertrain control, sealed designs for high-pressure washdown compliance with IP6K9K, and modular designs with field serviceability, which allows 30-minute IGBT module replacement.
Having flat IGBT mounting surfaces to within 0.015 inches guarantees that the thermal interface material is evenly compressed to a thickness of 0.05 to 0.1 millimeters. This ensures that thermal contact resistance is kept below 0.01°C-cm² per watt, which is essential for avoiding IGBT junction temperatures exceeding 150°C, preventing a drop in IGBT efficiency and a thermal shutdown. Seal groove dimensions to within ±0.005 inches ensure that the ring is compressed to obtain the IP67 rating. This prevents the ingress of water and moisture that could cause short-circuits. Moisture-contaminated air accounts for 20 percent of failures of the inverter. The design of the cooling channels and the smoothness of the channels with a roughness average (Ra) of below 3.2 microns ensures that the pressure drop is minimized to sufficiently allow an average 5 to 15 liters per minute flow rate while exceeding the heat transfer coefficient of 5000 watts per square meter-Kelvin. The wall thickness and ribbing of the channels provide adequate structural rigidity while preventing resonant vibration in the 100 to 2000 Hz range, which is the range of vehicle operation. Electromagnetic shielding with an effectiveness of 90 dB prevents conducted and radiated emissions, thus meeting CISPR 25 Class 5 limits and protecting vehicle communication and infotainment systems. Thermal management ensures that IGBT efficiency is maintained between 97 to 98 percent, where a 10°C increase in junction temperature limits efficiency by an additional 0.5 percent and doubles the failure rate.
Good manufacturing practices facilitate trustworthy power conversion which supports electric vehicles with inverters that have power ratings of 50-400 kilowatts and 400-800 VDC battery systems. For the IGBT, the switching frequency is 10-20 kHz, and for silicon carbide, it is 30-100 kHz. The thermal management keeps the continuous operating junction temperature between 125-150°C, 175°C peak, and the service life of the vehicle is more than 150,000 miles in battery electric vehicles, plug-in hybrids, and commercial electric trucks and buses.
Good manufacturing practices facilitate trustworthy power conversion which supports electric vehicles with inverters that have power ratings of 50-400 kilowatts and 400-800 VDC battery systems. For the IGBT, the switching frequency is 10-20 kHz, and for silicon carbide, it is 30-100 kHz. The thermal management keeps the continuous operating junction temperature between 125-150°C, 175°C peak, and the service life of the vehicle is more than 150,000 miles in battery electric vehicles, plug-in hybrids, and commercial electric trucks and buses.
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