Base Flange: Temperature Range -40°C to +125°C

Q: What is the primary function of a base flange in battery terminal applications?

The base flange provides mechanical stability to prevent terminal post rotation or loosening due to vibration, while ensuring consistent electrical contact between the battery post and connecting cables.

Q: Can base flanges be used with different battery terminal sizes?

Base flanges are typically designed for specific terminal post diameters (commonly 12.7mm/0.5" or 16mm/0.625"). Using incorrect sizes can compromise both mechanical security and electrical performance.

Q: How does material selection affect base flange performance?

Copper alloys offer superior conductivity but require corrosion-resistant coatings. Aluminum provides good conductivity with lighter weight. Material choice balances conductivity, corrosion resistance, mechanical strength, and cost requirements.

Component Specifications

Definition

A precision-machined metal component designed to provide a stable mounting platform and electrical interface for battery terminal posts in automotive electrical systems. It ensures proper alignment, mechanical stability, and reliable current transfer between the battery and vehicle wiring harness.

Working Principle

The base flange functions as both a mechanical anchor and electrical conductor. It distributes clamping force evenly across the battery terminal post, prevents rotation or displacement during vibration, and provides a low-resistance path for electrical current through direct metal-to-metal contact with the terminal post and connecting cables.

Materials

Lead-coated copper alloy (C11000 or equivalent), aluminum alloy 6061-T6, or brass C36000 for corrosion resistance and optimal conductivity. Surface finish: Electroplated tin or nickel coating (5-10μm thickness) for enhanced corrosion protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight	Approximately 120g
Thickness	8mm ±0.2mm
Inner Diameter	12.7mm (0.5 inch)
Mounting Holes	4x M6 threaded
Outer Diameter	45mm ±0.5mm
Temperature Range	-40°C to +125°C
Bolt Circle Diameter	35mm
Torque Specification	8-10 Nm for terminal post connection
Electrical Resistance	<0.5mΩ

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 8820-8, DIN 72551, SAE J537

Parent Products

This component is used in the following industrial products

Battery Terminal Post

A battery terminal post is a critical conductive component that serves as the electrical interface between individual battery cells or cell groups and the external circuit.

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Engineering Analysis

Risks & Mitigation

Galvanic corrosion with dissimilar metals
Over-torquing causing thread damage
Insufficient contact pressure leading to high resistance
Vibration-induced loosening
Thermal expansion mismatch

FMEA Triads

Trigger: Incorrect torque application during installation
Failure: Loose connection leading to increased electrical resistance and overheating
Mitigation: Implement calibrated torque tools and operator training; use thread-locking compounds where specified

Trigger: Corrosion at metal interfaces
Failure: Degraded electrical conductivity and potential connection failure
Mitigation: Apply appropriate anti-corrosion compounds; specify compatible materials; implement protective coatings

Trigger: Material fatigue from vibration
Failure: Crack formation and eventual mechanical failure
Mitigation: Design with adequate safety factors; implement vibration-damping washers; conduct vibration testing

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1mm on critical dimensions, ±0.5mm on non-critical features

Test Method

Dimensional verification via CMM, electrical resistance testing per ISO 8820, vibration testing per SAE J2380, salt spray testing per ASTM B117

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Base Flange

Manufacturer profiles associated with Base Flange.

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Frequently Asked Questions

What is the primary function of a base flange in battery terminal applications?