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Electric vehicle battery case | What is an electric vehicle battery case?
2026-10-10
What Is an Electric Vehicle Battery Case? Complete Guide
Table of Contents
1. What Is an Electric Vehicle Battery Case?
1.1 Basic Definition
An electric vehicle (EV) battery case is a core precision die-cast housing component specially designed for new energy vehicle battery packs. Manufactured with ADC12 aluminum alloy die-casting and secondary high-precision CNC machining, it acts as a protective carrier for EV battery modules, BMS systems, and internal wiring. Different from traditional steel and plastic casings, aluminum die-cast battery cases feature light weight, high structural rigidity, excellent heat dissipation, and strong impact resistance, becoming the mainstream protective solution for modern electric vehicle batteries.
1.2 Product Features
ADC12 aluminum EV battery cases adopt integrated one-piece die-casting molding, with no splicing gaps and high overall structural integrity. The product supports fully customized size, wall thickness, mounting holes, heat dissipation structures and surface treatments. With outstanding corrosion resistance, thermal conductivity and vibration resistance, it can adapt to complex road conditions and long-term high-load operation of new energy vehicles, effectively protecting internal battery components from external damage.
2. Core Functions of ADC12 Die-Cast EV Battery Cases
2.1 Physical Protection & Impact Resistance
The high-rigidity die-cast aluminum structure provides reliable anti-collision and anti-extrusion protection for battery packs. It effectively buffers external impact, road vibration and friction, avoiding battery module deformation, short circuit and damage, and greatly improving the driving safety of electric vehicles.
2.2 Efficient Heat Dissipation & Temperature Stabilization
ADC12 aluminum alloy owns superior thermal conductivity, which can quickly export heat generated by battery charging and discharging. It balances the internal temperature of the battery pack, prevents overheating and thermal runaway, and extends the service life of EV batteries.
2.3 Sealing Protection & Waterproof Dustproof
Through precision CNC fitting and professional sealing technology, the die-cast battery case achieves excellent waterproof, dustproof and moisture-proof performance. It isolates rainwater, dust and humid air, ensuring stable operation of battery packs in various harsh driving environments.
2.4 Lightweight Energy Saving & Structural Stabilization
Compared with metal steel casings, aluminum die-cast shells greatly reduce the overall vehicle weight, realizing vehicle lightweighting. It effectively improves EV cruising range while strengthening the overall structural stability of the battery pack and reducing driving vibration impact.
2.5 EMI Shielding & Safety Isolation
The integrated aluminum alloy structure provides reliable electromagnetic shielding performance, isolating external electromagnetic signal interference and ensuring stable operation of battery management systems and vehicle electronic components.
3. Universal Specifications & Parameter Table of ADC12 EV Battery Cases
All our customized electric vehicle battery cases adopt standard ADC12 aluminum alloy, compliant with international automotive industry standards, with stable mechanical properties and excellent environmental adaptability. The universal technical parameters are as follows:
|
Parameter Item
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Universal Standard Specification
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Testing & Implementation Standard
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|---|---|---|
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Material Grade
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ADC12 Aluminum Alloy (AlSi9Cu3)
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JIS H 5302 / EN AC-46000
|
|
Dimensional Tolerance
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±0.05mm (precision custom); ±0.1mm (conventional)
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ISO Precision Machining Standard
|
|
Processing Wall Thickness
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1.2mm - 8.0mm (fully customizable)
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CNC Five-Face Forming Standard
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|
Tensile Strength
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≥220 MPa
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Automotive Mechanical Performance Test
|
|
Brinell Hardness
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75-85 HB
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Metal Hardness Standard Detection
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|
Thermal Conductivity
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≥96 W/(m·K)
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Thermal Performance Test Standard
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|
Salt Spray Resistance
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≥120 Hours Neutral Salt Spray Test Pass
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Automotive Anti-Corrosion Standard
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|
Protection Level
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Up to IP67 Waterproof & Dustproof
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IEC 60529 Standard
|
|
Certification
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ISO9001 / RoHS / Automotive Industry Certification
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Global Automotive Access Standard
|
4. Core Advantages of ADC12 Aluminum Die-Cast Battery Cases
4.1 Superior Material Comprehensive Performance
ADC12 aluminum alloy has high silicon and copper content, featuring excellent fluidity for complex thin-wall molding, high structural strength and wear resistance. It balances lightweight performance and impact resistance perfectly, fully meeting the long-term and high-standard use requirements of new energy vehicle battery systems, and is the most cost-effective material for EV battery shell die-casting.
4.2 Ultra-Precision Dimensional Control
Equipped with advanced five-face CNC machining equipment, we realize ultra-precise processing of battery case mounting holes, sealing grooves and assembly surfaces. The high-precision tolerance ensures zero-gap assembly, effectively avoiding water leakage, poor sealing and loose installation caused by dimensional deviation.
4.3 Strict Full-Process Quality Inspection
We are equipped with professional flaw detectors and three-dimensional (CMM) testing equipment. All finished battery cases undergo internal defect detection, full-size calibration and surface quality inspection to eliminate cracks, pores and dimensional errors, ensuring 100% qualified delivery of automotive-grade products.
4.4 Strong Customization Compatibility
We support full personalized customization of battery case size, structure, heat dissipation groove, mounting position and surface process. Whether standard passenger car battery shells, commercial vehicle battery casings or special-shaped new energy equipment battery housings, we can complete production according to customer drawings and samples.
4.5 Factory Direct Sales & Batch Preferential Policy
Relying on our self-owned 10,000-square-meter factory, we eliminate intermediate distributors, with prominent price advantages. We implement a transparent gradient discount mechanism: the larger the order batch, the higher the discount, helping customers reduce long-term bulk procurement costs.
5. Main Application Scenarios & Market Coverage
5.1 Passenger Electric Vehicles
Widely used in pure electric and hybrid passenger cars, providing all-round safety protection for vehicle power battery packs. The lightweight and high heat dissipation performance effectively improves vehicle cruising range and battery safety stability.
5.2 Commercial New Energy Vehicles
Suitable for new energy trucks, logistics vehicles, buses and engineering vehicles. The high-rigidity die-cast structure adapts to high-frequency vibration and heavy-load operation of commercial vehicles, ensuring long-term stable battery operation.
5.3 New Energy Energy Storage Equipment
Applied to household energy storage batteries, industrial energy storage power supplies and outdoor backup battery equipment. Excellent waterproof, heat dissipation and anti-corrosion performance adapt to indoor and outdoor complex environments.
5.4 Special Intelligent Vehicle Equipment
Matched with AGV intelligent vehicles, sightseeing electric vehicles, unmanned delivery vehicles and other special equipment battery systems, meeting the customized structural and safety requirements of special new energy equipment.
6. Market Price Analysis of EV Battery Cases
The market price of custom ADC12 aluminum die-cast EV battery cases is mainly affected by structural complexity, processing precision, surface technology and order quantity, with obvious scale cost advantages.
6.1 Standard Conventional Battery Cases
Simple-structured regular battery shells with basic surface treatment have low processing difficulty and moderate unit prices, suitable for mass-produced conventional new energy models and civilian energy storage equipment, with high cost performance.
6.2 Medium-Precision Custom Cases
Products with precise tolerance, heat dissipation structure optimization and anodizing surface treatment are the mainstream market products, widely used in mainstream passenger cars and commercial new energy vehicles, balancing quality and price perfectly.
6.3 High-Precision Special-Shaped Cases
Special-shaped battery shells with complex grooves, ultra-thin walls and special sealing structures have high processing thresholds and relatively high unit prices, mainly used for high-end new energy vehicles and precision intelligent energy storage equipment.
6.4 Batch Order Price Advantage
Custom die-casting involves fixed costs such as mold opening and equipment debugging. Large-batch orders can fully dilute fixed costs. As a direct manufacturer, we provide exclusive tiered discounts, and bulk orders can obtain significantly lower unit prices, bringing long-term cost savings for customers.
7. Common Usage Problems & Professional Solutions
7.1 Battery Case Surface Corrosion & Oxidation
Common Problem
Long-term exposure to outdoor humid, high-temperature and rainy environments easily causes surface oxidation, discoloration and corrosion of aluminum battery cases, affecting appearance and protective performance.
Professional Solution
We adopt composite surface treatments such as anodizing, sandblasting and electrophoretic coating to form a dense protective film on the shell surface, greatly improving anti-corrosion, anti-oxidation and weather resistance, adapting to long-term outdoor vehicle operation.
7.2 Poor Assembly & Sealing Failure
Common Problem
Insufficient processing precision leads to dimensional deviation, resulting in assembly gaps, loose fitting and poor waterproof sealing, which may cause battery water ingress and failure.
Professional Solution
We rely on five-face CNC precision processing technology to strictly control assembly tolerance, conduct secondary fine calibration on key sealing and mounting positions, and pass full-size CMM detection before delivery to ensure zero-gap seamless assembly and stable sealing performance.
7.3 Structural Deformation & Vibration Damage
Common Problem
Low structural rigidity leads to shell deformation after long-term road vibration and impact, affecting internal battery fixing and overall safety.
Professional Solution
Adopt integrated die-casting integral molding process, optimize internal reinforcing rib structure, and conduct professional vibration and impact resistance tests on finished products to ensure no deformation or looseness during long-term use.
7.4 Unqualified Heat Dissipation Performance
Common Problem
Unreasonable heat dissipation structure design or rough processing leads to poor heat conduction, causing battery overheating and affecting service life.
Professional Solution
According to customer equipment parameters, we optimize heat dissipation groove structure and surface flatness, combine ADC12’s high thermal conductivity to ensure rapid and uniform heat dissipation, and improve battery operating stability.
8. Industry Expert Viewpoints on EV Battery Case Manufacturing
Senior experts from the New Energy Vehicle Hardware Manufacturing Industry Association stated that with the rapid upgrading of new energy vehicle safety standards, high-precision, high-rigidity and heat-dissipating aluminum die-cast battery cases have completely replaced traditional metal and plastic shells and become the standard configuration of the industry.
Industry technical experts emphasized that ADC12 aluminum alloy is the most suitable material for mass production of EV battery cases due to its balanced mechanical properties, excellent molding performance and cost advantages. The core of product quality lies in precision processing equipment, full-process flaw detection and strict tolerance control. Only manufacturers with independent R&D, mold opening, precision processing and complete testing capabilities can meet the high safety standards of automotive-grade battery shells.
Experts predict that with the popularization of high-end new energy vehicles and energy storage equipment, the market demand for customized high-precision aluminum die-cast battery casings will continue to grow, and lightweight, high-safety and integrated die-cast products will become the mainstream development direction.
9. Custom Die-Casting Industry Trends & Supplier Selection Guide
9.1 Development Trends of Custom Die-Cast Hardware Industry
9.1.1 Ultra-Precision Manufacturing Upgrade
The industry is moving towards higher precision tolerance control. Automotive and new energy supporting die-cast parts require micron-level dimensional accuracy to adapt to integrated assembly and high-safety equipment standards.
9.1.2 Integration of Lightweight & High Safety
Products no longer pursue single structural performance, but realize the integration of light weight, high strength, heat dissipation, sealing and anti-corrosion, meeting the comprehensive performance requirements of new energy equipment.
9.1.3 Intelligent Customized Production
Intelligent CNC equipment and automated testing replace traditional manual processing, realizing rapid proofing, efficient mass production and stable quality consistency, greatly shortening customer delivery cycles.
9.1.4 Strict Automotive-Grade Quality Standardization
The industry continuously improves quality inspection standards, and full-process flaw detection and dimensional calibration have become the basic thresholds for qualified automotive die-cast suppliers.
9.2 How to Choose a High-Quality Die-Casting Hardware Supplier
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Complete Precision Equipment Configuration: Equipped with five-face CNC machining equipment, professional flaw detectors and three-dimensional CMM testing equipment to ensure ultra-precise tolerance control and zero-defect products.
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Independent Factory Strength: Own self-owned large-scale factory to realize full-process independent production from mold opening, die-casting, precision machining to surface treatment, ensuring stable delivery and no intermediate markup.
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Professional Customization Capability: Support in-depth drawing analysis, meet personalized structural, dimensional and process customization needs, and solve complex die-cast product processing problems.
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Strict Full-Process Quality Control: Have complete automotive-grade testing procedures and certification systems to ensure 100% qualified delivery of bulk products.
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Cost-Effective Batch Discount Policy: Provide transparent gradient batch discounts to reduce long-term procurement costs for enterprise customers.
10. Why Choose Xinghang Precision Hardware
10.1 Ultra-Precision Tolerance & Strict Quality Control
We are equipped with advanced five-face CNC machining equipment, professional flaw detectors and three-dimensional (CMM) precision testing equipment. Our professional technical team provides in-depth drawing analysis and size optimization, stably achieving ±0.05mm ultra-precision tolerance. We are fully confident in dimensional accuracy and product quality to meet all automotive-grade customization requirements.
10.2 Independent 10,000-Square-Meter Factory Advantage
The company owns a nearly 10,000-square-meter modern independent factory with a complete industrial chain integrating R&D design, mold manufacturing, aluminum alloy die-casting, precision machining and surface treatment. Full-process self-control avoids outsourcing quality risks and ensures stable delivery cycles.
10.3 All-Round Customization Capability
We support customization of all types of die-cast product shells and precision hardware parts, including various standard and special-shaped EV battery cases, energy storage equipment shells and industrial precision die-cast parts. We can customize production according to customer drawings and samples to provide exclusive solutions.
10.4 Competitive Price & Batch Preferential Policy
Benefiting from self-owned factory production and no intermediate links, we have prominent industry price advantages. We implement a transparent batch gradient discount mechanism: the more the order quantity, the higher the discount, effectively reducing customers’ long-term bulk procurement costs.
10.5 One-Stop Professional Service
We provide full-cycle services including pre-sales drawing analysis, scheme optimization, rapid sample proofing, mass production arrangement and after-sales technical support, efficiently responding to global customers’ customized die-casting processing demands.
11. Industry FAQ
Q1: Why choose ADC12 aluminum alloy for EV battery cases?
ADC12 aluminum alloy has excellent fluidity for complex thin-wall molding, high mechanical strength, superior thermal conductivity and weather resistance. It balances lightweight performance and structural safety perfectly, with high cost performance, fully meeting the long-term safety and heat dissipation requirements of new energy vehicle battery systems, and is the most mainstream automotive-grade die-casting material for battery shells.
Q2: What customization services can you provide for EV battery cases?
We support full personalized customization of battery caseoverall size, wall thickness, heat dissipation structure, mounting hole position, sealing groove design and surface treatment technology. We can produce standard models and special-shaped non-standard products according to customer drawings and sample requirements.
Q3: How do you ensure the safety and quality of customized battery cases?
We adopt integrated die-casting molding + five-face CNC precision processing, equipped with flaw detectors for internal defect detection and CMM three-dimensional instrument for full-size calibration. All products pass strict salt spray, vibration and impact tests to ensure automotive-grade safety and stability.
Q4: Is bulk ordering more cost-effective?
Yes. Custom die-casting has fixed mold opening and debugging costs. Large-batch orders can dilute fixed costs significantly. Our tiered discount policy enables larger orders to enjoy lower unit prices, helping customers save long-term procurement costs.
Q5: Are your battery cases compliant with international standards?
All our ADC12 die-cast EV battery cases comply with JIS, EN automotive industry standards, pass ISO9001 quality management certification and RoHS environmental certification, fully meeting global market access requirements and supporting overseas export projects.
12. Comprehensive Summary
ADC12 aluminum die-cast electric vehicle battery cases are core safety protective components for new energy vehicles and energy storage equipment. With the advantages of light weight, high rigidity, efficient heat dissipation, waterproof and anti-corrosion, they have become the mainstream choice for new energy battery system supporting parts, replacing traditional hardware shells.
At present, the customized die-cast hardware industry is developing towards ultra-precision processing, intelligent production, lightweight integration and high-standard safety customization. Choosing a high-quality supplier with independent factory strength, complete precision equipment and strict quality control is the key to obtaining high-quality and cost-effective customized die-cast products.
As a professional high-tech die-casting hardware manufacturer, Xinghang Precision Hardware relies on its 10,000-square-meter independent factory, advanced five-face CNC equipment, professional testing equipment and mature full-process production technology to provide global customers with one-stop customized solutions for EV battery cases and various die-cast shells. With reliable quality, factory direct prices and flexible batch discounts, we create maximum value for every customer.
13. Official Contact Information
Welcome global customers to consult custom ADC12 aluminum die-cast EV battery case solutions and provide design drawings for personalized proofing and bulk quotation! We provide professional one-stop die-casting, CNC precision machining and surface treatment services with full-cycle technical after-sales support.
Mobile / Whatsapp / WeChat: +86 18819502691
Email: liqine@xinghangcn.com
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