Precision Engineering for Global OEMs

Custom Battery Housing services

From rapid prototyping to high-volume production, Supro MFG delivers one-stop precision metal fabrication with ISO-certified quality. Reduce your lead times and production costs with our expert DFM support.

1-3 day Rapid Prototyping & Agile Supply Chain Delivery.
On-time delivery of high quality product commitments.
Extensive Material Selection & Industrial-Grade Finishing.
Direct-from-Factory Pricing & Transparent Costing.
ISO 9001-2015 / IATF 16949:2016 certified system.
Integrated Assembly: Delivering finished, ready-to-use products, not just components.

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Rapid Prototypes, DFM Optimization, On-Time Delivery, Real Manufacturer Quote.

Rapid stamping die Turnaround

Committed to exceeding expectations for quality and rapid turnaround, and meeting high-quality sheet metal parts.

Consistency & high quality

Whether it is rapid prototyping & large-volume manufacturing, we will implement it according to customer needs and standards.

Low Cost Effective

Integrate product design, bending, stamping, cutting, surface treatment, etc. to provide a series of manufacturing solutions.

Precision Metal Fabrication Services in China | Custom OEM Solutions & Rapid Prototyping

Your Strategic Partner for Battery Housing Fabrication

At Supro MFG (Supro Manufacturing Co., Ltd.), we don’t just manufacture parts; we engineer reliability. As a leading China metal fabrication factory, we bridge the gap between complex design and cost-effective production. By leveraging our ISO 9001:2015 & IATF 16949 certified facilities and a seasoned engineering team, we provide 3,000+ global clients with unparalleled custom metal fabrication services—direct from the source with transparent, manufacturer-level pricing.

We specialize in the high-quality manufacturing and assembly of custom metal parts, with processing capabilities encompassing: sheet metal fabrication, metal stamping, CNC machining, laser cutting, metal welding, metal spinning, deep drawing, aluminum extrusion, die casting, as well as customized finished product assembly and surface treatment services.

From concept prototypes to mass production,

Supro MFG is your most reliable partner and you will benefit from our manufacturing services.

What Is a Battery Housing?

A battery housing is a rigorously engineered sheet metal structure designed to enclose and protect sensitive energy storage batteries from mechanical shocks, heat transfer, and environmental intrusion. As a critical structural component in electric vehicles and industrial power systems, battery housings must meet stringent IP67/IP68 sealing standards while withstanding dynamic vibrations and severe impact loads.

Since effective thermal runaway containment and electromagnetic interference (EMI) shielding are non-negotiable requirements, high-quality battery housings must be manufactured using precision CNC bending processes and constructed from laser-welded lightweight aluminum alloys or advanced high-strength steel (AHSS). Off-the-shelf battery housings cannot meet these complex, application-specific thermal and dimensional tolerance requirements.

At Supro MFG, leveraging our advanced custom sheet metal fabrication expertise, we provide scalable, precision-manufactured battery housings and internal mounting assemblies that perfectly align with your specific regulatory compliance requirements and rapid production needs.

Securing Your Designs with Enterprise-Grade Confidentiality at Every Stage of Manufacturing

Your Innovation, Protected:
Uncompromising IP Security & NDA Compliance

At Supro MFG, we understand that your designs are your most valuable assets. As a strategic sheet metal stamping partner, our commitment to your intellectual property is absolute. We operate under a strict Zero-Leak Policy, ensuring that every blueprint, CAD file, and prototype remains strictly confidential within our secure engineering ecosystem.

We proactively offer comprehensive Non-Disclosure Agreements (NDAs) that align with international legal standards, providing you with a transparent and enforceable framework for cooperation. Beyond legal paperwork, our internal protocols include segmented data access, secure server encryption, and rigorous staff training on IP sensitivity. Whether you are a startup scaling a disruptive product or an OEM managing sensitive aerospace components, Supro MFG acts as a secure extension of your own facility. Partner with a metal stamping manufacturer that values your competitive advantage as much as you do.

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Common Issues with Battery Housings

In electric vehicles (EVs), energy storage systems (ESS), and heavy-duty industrial applications, battery housings serve not only as physical enclosures but also as critical structural components involved in thermal management, electrical insulation, and crash safety. Based on extensive customer engineering feedback and high-end sheet metal manufacturing standards, we have identified several defects that are both real and frequently encountered in battery housing manufacturing.

Bottom Co-planarity Exceeding Tolerance Limits

An uneven battery housing bottom prevents internal battery modules, mounting brackets, or bottom liquid cooling plates from fitting tightly, leading to localized heat dissipation failure or excessive assembly stress. The primary causes include: material springback during stamping or bending; warping of the base plate due to excessive heat input during welding; and the lack of specialized flatness correction fixtures.

Supro employs high-tonnage hydraulic presses for post-welding precision flattening/leveling. For large base plates, we recommend incorporating reverse camber (pre-compensation) design during the tooling phase. Prior to shipment, 100% inspection via 3D laser scanning or feeler gauges on a marble platform is mandatory to ensure flatness tolerances are maintained within the range of 0.5mm to 1.0mm.

Vibration Fatigue and Resonance Cracking

After prolonged road profile vibration testing, fatigue tearing occurs on the load-bearing side walls or bottom lugs of the battery housing. The causes include: insufficient design margin in sheet thickness; lack of effective vibration-damping stiffeners; and resonance triggered by the system’s natural frequency coinciding with external excitation frequencies.

Supro incorporates CAE finite element analysis (FEA) in the early design phase to simulate random vibration and impact conditions. In stress concentration areas, we employ laser-welded thin-walled (TWB) technology or stamp reinforced grid-shaped ribs at critical locations to alter the modal frequency of the battery housing.

Risk of Internal Burr Puncture

Sharp edges or punching burrs on the inner walls or flange edges of sheet metal parts may puncture the battery pack’s insulating separator or high-voltage wiring harness during vehicle vibrations, causing catastrophic short circuits. This issue primarily arises from: unstable laser cutting gas pressure causing slag buildup; excessive clearance in stamping dies; and incomplete deburring during post-processing.

How can this be resolved?

Drawings must strictly specify deburring requirements. Automated grinding and chamfering equipment or fluid polishing processes should be introduced on the production line to ensure that all internal contact surfaces have smooth edge transitions (e.g., R0.5 chamfers), thereby completely eliminating the risk of puncture.

Surface Coating Blistering and Corrosion Protection Failure

In salt spray environments or when exposed to trace battery fluid leaks, the external powder coating or electrophoretic primer on battery housings may develop extensive blistering or peeling. The causes include: substandard degreasing and rust removal during pre-painting treatment; residual acid or alkali cleaning solutions in sheet metal gaps; and insufficient coating thickness, which is also a common contributing factor.

Supro has established a rigorous dual-layer corrosion protection system comprising “Cathodic Electrocoating (E-Coating) + Outdoor-Grade Powder Coating.” Product structural design should avoid dead corners to ensure the electrocoating solution can flow out smoothly. Each batch must pass a neutral salt spray test (NSS) of at least 1,000 hours.

No design files? Let Supro MFG do it for you.

We often come across clients who have no professional design drawings and documentation, only a creative idea, which leads to the project being at a standstill.

If you are in this situation, then contact our team of experts.

Supro MFG, as an industry-leading custom metal fabricator, has an ever-experienced team of engineers who utilize their extensive fabrication experience and technical expertise to build your idea into a real product and create design files such as STEP/STP/SLDPRT/DXF/PDF/PRT/DWG/AI.

That’s what makes SUPRO MFG so great, and 2,000 corporate, entrepreneurial, artist, and other purchasers from around the world enjoy working with us and benefiting from our one-stop manufacturing services.

A part is only as good as its finish.

High-Performance Surface Finishing: Aesthetics Meets Durability

At Supro MFG, we understand that professional custom metal fabrication requires more than just structural integrity—it demands surface treatments that withstand harsh environments and strict aesthetic standards.

Our integrated finishing shop provides a seamless transition from the production line to the final coating, ensuring tight control over lead times and quality.