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Power Electronics Enclosures CNC Machining for EV Systems
Power electronics enclosures provide machined protective housings that cover inverters, DC-DC converters, and onboard chargers. They protect from environmental exposure, provide thermal management, and block electromagnetic interference in electric vehicle powertrains. At Zintilon, we do CNC machining of power electronics enclosures and use advanced die-cast finishing and multi-axis milling. This guarantees exceptional machining to achieve thermal dissipation and compliance with the stated IP rating for reliable operation in passenger vehicles, commercial trucks, and high-voltage electric powertrains (between 400-800V) during 800V systems handling.
- Machining for complex enclosure geometries and integrated heat sink designs
- Tight tolerances up to ±0.005 in
- Precision CNC milling, pressure die-casting & anodizing
- Support for rapid prototyping and full-scale production
- ISO 9001-certified automotive manufacturing
Trusted by 15,000+ businesses
Why Semi-Concductor 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 medical parts for leading aerospace enterprises, verified to be compliant with ISO9001 quality standard by a certified registrar.
From Prototyping to Mass Production
Zintilon offers CNC machining for power electronics enclosures and related protective housing components for automotive manufacturers, inverter suppliers, and electric vehicle developers globally.
Prototype Power Electronics Enclosures
Construct functional prototypes that assess thermal performance and electromagnetic compatibility. These include testing cooling capacity, verifying IP rating compliance, and checking mounting interfaces, all before moving on to production.
Key Points:
Key Points:
- Rapid prototyping with high precision
- Tight tolerances (±0.005 in)
- Test design, thermal management, and EMC shielding early
EVT – Engineering Validation Test
Design enclosure prototypes to ensure compliance with all tests for protecting the environment and thermal dissipation. Identify and resolve issues in the prototype before full production to minimize trouble later in automotive manufacturing.
Key Points:
Key Points:
- Validate prototype functionality
- Rapid design iterations
- Ensure readiness for production
DVT – Design Validation Test
Determine the design for enclosure mass production and assess the thermal performance of various components to ensure design accuracy for heat dissipation before mass production.
Key Points:
Key Points:
- Confirm design integrity and IP rating compliance
- Test multiple materials and configurations
- Ensure production-ready performance
PVT – Production Validation Test
Assess the production feasibility of power electronics enclosures on a mass scale, and analyze enclosures to identify problems that may need to be addressed before production on the widely automated and scalable enclosure commences.
Key Points:
Key Points:
- Test the large-scale production capability
- Detect and fix process issues early
- Ensure consistent part quality
Mass Production
Produce high-quality thermally optimized power electronics enclosures while protecting inverters and delivering on time for electric vehicle manufacturers and tier 1 suppliers.
Key Points:
Key Points:
- Consistent, high-volume production
- Precision machining for optimal thermal dissipation
- Fast turnaround with strict quality control
Simplified Sourcing for
Robotics Industry
Our robotics industry parts manufacturing capabilities have been verified by many listed companies. We provide a variety of manufacturing processes and surface treatments for robotics parts including titanium alloys and aluminum alloys.
Explore Other Semiconductor Components
Browse our complete selection of CNC machined semiconductor components, crafted for durability and ultra-tight tolerances. From precision tooling and fixture parts to vacuum chambers and wafer handling systems, we deliver solutions tailored to advanced semiconductor production.
EV Power Electronics Enclosures Machining Capabilities
Our CNC machining centers and pressure die casting machines, and other automotive machining specialists, offer Power Electronics Enclosures CNC Machining for EV Systems. Integrated heat sink housings, liquid-cooled cold plate assemblies, and multi-chamber EMI shielded enclosures and other components that are optimized for thermal management, EMC, and environmental protection are engineered. We've furnished precision CNC milling for mounting interfaces, die casting heat sink finishing, integrated cooling channel machining, anodizing for profiling that ensures thermal performance, CMM for dimensional accuracy, IP rating testing, and thermal performance. Power electronics enclosures are die-casted in A380 aluminum, MX91D magnex, and other aluminum and shielded with 6061-T6 or ADC12 aluminum. Each power electronics enclosure, radically cooled nd designed, provides thermal protection and EMI under high power operation on electric vehicle inverters and converters, and protects devices respectively with thermal and EM shielding while operating at 50-300 kW.
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 Power Electronics Enclosures
At our CNC machine shop, there are lots of different materials to choose from to build Power Electronics Enclosures for EV Systems. We have more than 20 different aluminum casting alloys and heat sink materials. We also do quick prototypes and make electronic housings with IATF 16949 automotive quality standards.
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
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
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Steel is a strong, versatile, and durable alloy of iron and carbon. Steel is strong and durable. High tensile strength, corrosion resistance heat and fire resistance, easily molded and formed. Its applications range from construction materials and structural components to automotive and aerospace components.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.001 mm (routing)
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Highly resistant to seawater corrosion. The material’s mechanical properties are inferior to many other machinable metals, making it best for low-stress components produced by CNC machining.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Few metals have the electric conductivity that copper has when it comes to CNC milling materials. The material’s high corrosion resistance aids in preventing rust, and its thermal conductivity features facilitate CNC machining shaping.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
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
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
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
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
Let’s Build Something Great, Together
FAQs: Power Electronics Enclosures for EV System Applications
Power electronics enclosures are well-designed protective housings for inverters that convert 400V to 800V DC battery power to three-phase AC motor power at 0 to 400 Hz, 80 to 300 kW power, DC-DC converters that step down high-voltage 400V to 800V to 12V to 48V low-voltage systems delivering 2 to 5 kW continuous power, and onboard chargers that convert AC grid power to DC battery charging at 3.3 to 22 kW Level 2 or 50 to 350 kW DC fast charging.
Examples are fully integrated heat sink enclosures with 3 to 8 fins per inch densities and 0.3 to 1.2 square meter surface areas dissipating 2 to 8 kilowatts through natural or forced air convection. Liquid cooled cold plate housings with internal channels 4 to 10 millimeter diameter, circulating coolant at 5 to 20 liters per minute flow rate, removing 3 to 12 kilowatt continuously. Two-piece clamshell IP67 ingress protection (moisture and dust ingress) sealed designs, multi-chamber enclosures with internal EMI shielding partitions separating high-voltage power stage from low-voltage control electronics and specialty designs as modular inverter housings for power electronics 100 to 400 kilowatts in commercial vehicles, integrated motor-inverter assemblies reducing high-current cables and system mass by 8 to 15 kilograms and wide-bandgap semiconductor compatible housings optimized for silicon carbide SiC devices with operating junction temperatures 150°C to 175°C.
Examples are fully integrated heat sink enclosures with 3 to 8 fins per inch densities and 0.3 to 1.2 square meter surface areas dissipating 2 to 8 kilowatts through natural or forced air convection. Liquid cooled cold plate housings with internal channels 4 to 10 millimeter diameter, circulating coolant at 5 to 20 liters per minute flow rate, removing 3 to 12 kilowatt continuously. Two-piece clamshell IP67 ingress protection (moisture and dust ingress) sealed designs, multi-chamber enclosures with internal EMI shielding partitions separating high-voltage power stage from low-voltage control electronics and specialty designs as modular inverter housings for power electronics 100 to 400 kilowatts in commercial vehicles, integrated motor-inverter assemblies reducing high-current cables and system mass by 8 to 15 kilograms and wide-bandgap semiconductor compatible housings optimized for silicon carbide SiC devices with operating junction temperatures 150°C to 175°C.
A380 aluminum die casting makes it possible for complex integrated heat sink shapes to be cast with fin thickness and aspect ratios favoring heat sink casting and thermal conductivity of 96 watts per meter Kelvin for heat spread from semiconductor devices with junction area of 500 to 3000 watts per square centimeter molten, automotive underbody, salt spray, and corrosion resistant also cost efficient with high volume production for automotive applications to over 100,000 units annually with cycle times of 45 to 120 seconds. Superior 6061-T6 aluminum machinability enables precision sealing surfaces for better control of gasket and bolted joints with critical interface surfaces to power modules for thermal mounting surfaces and junction area of 500 to 3000 watts per square centimeter with sturdy 276 MPa yield strength for bolted joints, especially under impact, also enhanced anodizing for corrosion and electrical insulation with 10 to 25 microns oxide achievement.
Aluminum ADC12 has excellent die-casting attributes and great fluidity for filling thin walls and complex shapes. It has balanced mechanical properties with tensile strength between 300 and 330 megapascals after T5 heat treatment. It demonstrates dimensional stability and maintains tolerances through thermal cycling and exposure between -40°C and 125°C. It has powertrain component automotive qualifications with Japanese and Asian vehicle manufacturers.
Aluminum ADC12 has excellent die-casting attributes and great fluidity for filling thin walls and complex shapes. It has balanced mechanical properties with tensile strength between 300 and 330 megapascals after T5 heat treatment. It demonstrates dimensional stability and maintains tolerances through thermal cycling and exposure between -40°C and 125°C. It has powertrain component automotive qualifications with Japanese and Asian vehicle manufacturers.
High-pressure die-casting is used for the first level of power electronics enclosures. It makes the first enclosures out of aluminum, which are then machined by CNC. The casting temperature is kept between 640 °C - 680 °C with casting pressure between 40-100 megapascals, which achieves the wall thickness of 2.5-6 mm, integrated cooling fins, and ± 0.3 mm precision. 5-axis CNC machined finishes,h cast surfaces to improve the sealing and the pressure of the gaskets, spaced cast flanges of the enclosure to improve sealing surfaces, and achieve ± 0.005 inches flatness with 250 to 500 mm size made fine sealed gaskets. Power connectors' ± 0.010 inches accurate bolts, and enclosure flanges for synchronization are fixed with ± 0.015 mm perpendicular surfaces for power electronics modules. CNC used for milling with 12,000 - 18,000 RPM for precision of the charge cooling control minutes with the enforced depth ± 0.003 in. of machined cooling channels made of aluminum or with cast blanks. The fine control of channel surfaces between Ra 1.6 - 3.2 microns permits minimized resistance to make the coolant flow through the conduits. Precision CNC drilling made sealed control surfaces with ±0.012 inches control for interlocking coolant flow ports with pressure sensors vis-a-vis cable glands and focus ports for coolant on montages. Impervious vacuum-sealing die-cast joint surfaces. Shut off joints and sections, monitor coolant flow with 1 differs of 6 in leak of bra-slit decorated blocks of helium 10-6 mbar l/sec.
After machining, heat treatment at a temperature of 170 degrees to 190 degrees for 4 to 8 hours achieves dimensional stability and relief of residual casting stresses. This helps achieve dimensional stability of ±0.020 millimeters after assembly.
After machining, heat treatment at a temperature of 170 degrees to 190 degrees for 4 to 8 hours achieves dimensional stability and relief of residual casting stresses. This helps achieve dimensional stability of ±0.020 millimeters after assembly.
We achieve sealing surface flatness at 0.005 inches for gasket contact surfaces of lengths between 200 and 400 millimeters to ensure uniform compression of 0.3 to 0.8 millimeters. This achieves IP67 ingress protection, which was verified with water immersion testing of 1 meter depth for 30 minutes. Mounting hole position accuracy is achieved within ±0.010 inches for automotive electrical connector interfaces and module mounting patterns. The flatness of power module mounting surfaces is within 0.003 inches over areas of 50 to 150 square centimeters while maintaining a uniform bondline thickness of thermal interface material of 0.05 to 0.15 millimeters to ensure a thermal resistance of 0.1 to 0.3 Kelvin square centimeters per watt. Perpendicularity of the mounting surfaces and the connector boss is 0.015 millimeters to align the electrical connector and control the excessive force of 100 newtons for insertion. The dimension of the cooling channel is ±0.003 inches to control the designed pressure drop of 0.3 to 1.0 bar at a flow rate of 8 to 15 liters per minute. Overall enclosure dimension is ±0.020 inches for vehicle integration and packaging constraints for installation in the underbody or motor compartment.
Yes, we provide rapid prototyping to verify fit and test assembly, with same-day CAD-to-part capability available for critical projects. For custom automation cells and research platforms, we perform low-volume production of 20 to 500 brackets. For standardized robot models, we perform high-volume production of thousands to tens of thousands of brackets annually, incorporating complete dimensional inspection, flatness verification, and material certifications.
Yes, all power electronics enclosures are built under IATF 16949:2016 automotive quality management systems, followed by advanced product quality planning and production part approval process, which allows for dimensional accuracy, functional performance, and material traceability. Enclosures are assessed and validated with the IP67 ingress protection rating by conducting water immersion testing to ensure moisture fencing, which can lead to high-voltage insulation failure. Enclosures also follow the UN ECE R10 standard by encapsulating radiated emissions between 30 to 40 decibels microvolts per meter at 30 megahertz to 1 gigahertz and enforcing electromagnetic field immunity, which allows unshielded inverter operation during field strengths between 30 to 100 volts per meter. ISO 16750 standard ambient condition surveillance for automotive components, which includes high and low temperature cycling between -40°C and +125°C. Enclosures also followed underbody installations shock and vibration resistance standards, which encapsulated corrosion resistance salt spray for more than 1000 hours per ASTM B117, then corrosion enhanced shock and vibration resistance in the 10 to 2000 hertz frequency range, and finally shock and vibration resistance in the 10 to 2000 hertz frequency range. For manufacturing processes, we check to see if the documents certify the materials we have, which show the composition of the alloy. Once we get the thermal conductivity values that are between 90 to 170 watts per meter Kelvin, we can complete the report. We have to complete da dimensional inspection report, which includes measurement uncertainty analysis. For leak testing documentation, we have to include the cool containers and thermal performance validation, which will show junction-to-coolant thermal resistance of 0.05 to 0.20 Kelvin per watt, to ensure that the cooling will meet the power electronics. This needs to be done for the 150,000 to 300,000-kilometer vehicle service life.
We provide comprehensive finishing solutions tailored to aerospace requirements:
Anodizing (Type II and Type III)
Passivation for corrosion resistance
Precision polishing for aerodynamic surfaces
Custom protective coatings and thermal barriers
Anodizing (Type II and Type III)
Passivation for corrosion resistance
Precision polishing for aerodynamic surfaces
Custom protective coatings and thermal barriers
Standard, die-cast aluminum casings with built-in heat sinks for inverters that are 100 to 200 kilowatts sell with an 8 to 12 week lead time, which includes die-casting, heat treatment to T5, CNC machining, anodizing, final quality inspection, and every other production aspect for the lots that range between 1,000 to 5,000 units. For custom liquid-cooled enclosures that require friction stir welding or vacuum brazing for hermetic channel sealing, the lead time is between 10 to 16 weeks, depending on how complex the design is, on the testing, which includes thermal performance testing, and on certification that the design meets the custom requirements. For rapid prototypes, machined from billet aluminum 6061-T6 for power electronics development programs, the time is 3 to 4 weeks because they are expedited. Basic finishing is done to allow early thermal and electromagnetic compatibility testing, while for limited production orders of over 25,000 enclosures a year, the time is 16 to 24 weeks for the initial setup. This includes pressure die-casting tooling, which ranges from
80,000to
80,000to200,000, depending on the complexity of the design, CNC machining fixture development, automated leak testing, inspection equipment, and production part approval process. This includes a complete set of dimensional and functional validation reports that are completed on phased deliveries, which are synchronized to the vehicle production schedules.
80,000to
80,000to200,000, depending on the complexity of the design, CNC machining fixture development, automated leak testing, inspection equipment, and production part approval process. This includes a complete set of dimensional and functional validation reports that are completed on phased deliveries, which are synchronized to the vehicle production schedules.
Yes, we design all integrated motor-inverter housings, eliminating high-current cable connections that reduce parasitic inductance and improve electromagnetic compatibility. We develop enclosures for wide-bandgap semiconductors optimized for silicon carbide (SiC) and gallium nitride (GaN) devices. They support enhanced thermal performances with junction temperature ranges of 150°C to 200°C at 20 to 100 kHz switching frequencies. This allows passive components to shrink by 30% to 50%. Scalable modular enclosures are designed for commercial vehicle inverters of 200 to 500 kilowatts. These inverters are designed for parallel power module installation with individual liquid cooling circuits. We have ultra-compact designs for space-constrained applications that achieve a power density of 30 to 50 kilowatts per liter for urban delivery vehicles and motorcycles. We have specialty configurations that include bidirectional charger housings for vehicle-to-grid (V2G) applications with integrated AC filter components and grid connection interfaces. We build aerospace-grade enclosures for electric aircraft using magnesium or carbon fiber composites that achieve power-to-weight ratios of 8 to 12 kilowatts per kilogram. We have marine-rated enclosures with IP68 continuous immersion protection for electric boat propulsion systems, and we have motor sport inverter housings with rapid serviceability that allow power module replacement in 15-30 minutes during competition events.
Custom designs include the analysis of coolant channels for temperature uniformity within +/- 5 °C of power devices, structural integrity under 30g shock loads, vibrations within 10-2000 hertz for finite element shock validation, and electromagnetic simulations that ensure over 60dB of shielding effectiveness to prevent vehicle communication systems operating between 100MHz-6GHz RF interference.
Custom designs include the analysis of coolant channels for temperature uniformity within +/- 5 °C of power devices, structural integrity under 30g shock loads, vibrations within 10-2000 hertz for finite element shock validation, and electromagnetic simulations that ensure over 60dB of shielding effectiveness to prevent vehicle communication systems operating between 100MHz-6GHz RF interference.
Flatness tolerances of power module mounting surfaces within 0.003 inches set bounds on thermal interface materials bondline thicknesses of 0.08 to 0.12 millimeters and thermal resistances of 0.1 to 0.2 Kelvin square centimeters per watt. This assures optimal thermal management and no hot spots. A junction temperature increase of 15 to 30°C and power semiconductor lifetime reduction from 15 years (100,000 operational hours) to 8 years (40,000 operational hours) are cumulative results of poorly managed thermal interfaces and gradients. Flatness tolerances on sealing surfaces of 0.005 inches assure uniform gasket compression for target IP67 ingress protection, allowing no moisture ingress to high-voltage enclosure spaces. High-voltage insulation resistance degradation from 1000 to 50 megohms (electrical and component failure risk) may result from moisture ingress coupled with high-voltage insulation. Moisture ingress weakens insulation, and high-voltage isolation becomes weak. Channel cooling geometry with stiffness within ±0.003 inches allows the designed flow distribution and pressure drop of 0.4 to 0.9 bar at the 10 to 18 lpm flow rate range. This assures effective cooling in the 4 to 10 kW range during continuous operation at high power of the motor (150 to 250 kW output).
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