Post Body: Height 15-20 mm

Component Specifications

Definition

The battery terminal post is a critical electrical interface component in automotive batteries, typically made of lead or lead alloy with a copper core for enhanced conductivity. It serves as the physical and electrical connection point between the battery's internal cells and the vehicle's electrical system via terminal clamps or connectors. Posts are designed with specific geometries (e.g., top-post or side-post configurations) to match industry standards, ensuring secure attachment and minimal resistance for efficient current flow in starting, charging, and accessory circuits.

Working Principle

The terminal post operates on the principle of electrical conduction, providing a low-resistance path for current between the battery's internal plates and external circuits. When connected via a clamp or bolt, it establishes a mechanical and electrical bond that allows for the transfer of electrical energy to power the vehicle's starter motor, lights, electronics, and other systems, while also receiving charge from the alternator.

Materials

Typically lead (Pb) or lead-calcium alloy for corrosion resistance and formability, often with a copper core or plating to improve conductivity. Some variants use brass or tin-plated steel for specific applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Height	15-20 mm
Diameter	12.7 mm (standard top-post)
Thread Size	M8 x 1.25 (common for side-posts)
Conductivity	> 90% IACS for copper-core types
Corrosion Resistance	ASTM B117 salt spray test > 96 hours

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 8854, DIN 72311, 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

Corrosion leading to increased resistance and voltage drop
Loose connections causing arcing or intermittent power loss
Over-tightening damaging the post or battery case

FMEA Triads

Trigger: Exposure to battery acid and environmental moisture
Failure: Corrosion buildup increasing electrical resistance
Mitigation: Apply protective coatings and use corrosion-resistant materials like lead-calcium alloys

Trigger: Incorrect torque during installation
Failure: Cracked post or poor contact leading to overheating
Mitigation: Follow manufacturer torque specs (e.g., 5-7 Nm for side-posts) and use proper tools

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Diameter tolerance ±0.2 mm, height tolerance ±1 mm per ISO 2768-m

Test Method

Conductivity tested per ASTM B193, corrosion resistance per SAE J537

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

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Inspection readiness

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Supplier transparency

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Manufacturers of Post Body

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Frequently Asked Questions

What are the common types of battery terminal posts?

The two main types are top-posts (standard conical studs) and side-posts (threaded bolts), with variations like marine or AGM posts for specialized applications.

How do I prevent corrosion on battery terminal posts?

Use anti-corrosion sprays or grease, ensure tight connections to avoid arcing, and regularly clean with a baking soda solution to neutralize acid buildup.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Post Body