Sealed Rivet Nuts for EV Battery Pack Trays

Reliable Threaded Fastening and Sealing Solutions for Aluminum Battery Enclosures

Why Sealed Rivet Nuts Are Used in Battery Enclosures

Battery enclosure fastening points can be exposed to moisture, road splash, dust, cleaning fluids, temperature changes, and vibration. 

A conventional open-end rivet nut leaves an opening through the fastener body, which may not be suitable for applications where enclosure sealing is important.

A closed-end sealed rivet nut is designed with a closed blind end to help prevent direct passage through the fastener body.

When combined with an appropriate sealing washer, gasket, O-ring, coating system, and enclosure design, the fastening point can be integrated into a broader battery enclosure sealing system.

This design can help support requirements such as:

Environmental Protection

The closed-end construction helps prevent direct ingress through the rivet nut itself.

Vibration Resistance

A properly installed rivet nut provides a mechanically retained threaded connection suitable for automotive and industrial assemblies exposed to vibration.

Repeated Assembly and Disassembly

Unlike a simple tapped hole in thin aluminum sheet, the rivet nut provides a dedicated threaded insert that can be used for repeated fastening and service access.

Thin-Wall Installation

Rivet nuts can be installed into relatively thin sheet metal and profiles where conventional nuts cannot be positioned from the rear.

Blind-Side Installation

The fastener can be installed from one accessible side of the battery tray or enclosure, which is particularly useful for closed box structures.

Sealed vs. Conventional Rivet Nut Designs

For battery enclosure applications, the sealing configuration of the rivet nut should be selected according to the enclosure structure, installation method, 

environmental exposure, and required sealing performance.

Recommended image : 

Comparison of conventional coated rivet nut and sealed closed-end rivet nut.

Conventional Coated Rivet Nut

A conventional rivet nut can provide a reliable threaded connection and may be suitable for many structural or non-sealing applications.

However, its open-end construction may not be appropriate when the fastening point itself needs to contribute to enclosure sealing.

Closed-End Sealed Rivet Nut

A closed-end rivet nut incorporates a closed body configuration and can be combined with sealing elements to help reduce potential ingress through the fastening point.

For EV battery enclosures, this configuration is particularly relevant where protection against water and dust is an important design consideration.

Mechanical Sealing and Rubber Sealing Options

Different battery tray designs require different sealing approaches.

Juxin can provide engineered rivet nut configurations using different sealing structures, including mechanical sealing and elastomeric sealing solutions.

Mechanical Sealing

A mechanical sealing configuration uses the geometry of the rivet nut and the clamped components to create a sealing interface.

Advantages can include:

• No separate rubber seal required in certain designs

• Good dimensional stability

• Resistance to aging associated with elastomeric materials

• Suitable for applications requiring repeated service

Rubber Ring Sealing

An elastomeric sealing element can provide additional compliance between the fastener and enclosure surface.

The sealing material can be selected according to the application requirements, including temperature range, chemical exposure, fluid resistance, and expected service life.

Recommended image 3: Cross-sectional diagram showing the sealing interface between the sealed rivet nut, enclosure wall, and mating fastener.

Designed for Repeated Fastener Removal

EV battery packs and battery enclosures may require periodic inspection, maintenance, component replacement, or service access.

For this reason, the threaded connection should be capable of supporting repeated tightening and removal without damaging the thin aluminum substrate.

A properly selected rivet nut provides a stable internal thread while distributing the installation load across the surrounding sheet material.

For demanding applications, engineers should evaluate:

• Thread size and pitch

• Rivet nut body material

• Grip range

• Panel thickness

• Installation force

• Pull-out resistance

• Spin-out resistance

• Tightening torque

• Clamp load

• Temperature cycling

• Vibration exposure

• Corrosion resistance

• Sealing performance

Material and Coating Selection for Aluminum Battery Trays

Material compatibility is an important consideration when installing threaded fasteners into aluminum battery enclosures.

Depending on the application, rivet nuts may be manufactured from materials such as:

• Carbon steel

• Stainless steel

• Aluminum

• Other engineered materials for specific applications

Surface treatment and coating selection should also consider the operating environment and potential galvanic interaction between dissimilar metals.

For EV battery applications, Juxin can discuss options such as corrosion-resistant coatings, stainless steel constructions, 

and application-specific surface treatments according to the required environment.

Battery Enclosure Sealing Performance

A sealed rivet nut is one component of the overall battery enclosure sealing system.

The final enclosure protection level depends on the complete assembly, including:

• Enclosure design

• Gasket selection

• Fastener spacing

• Clamp load

• Rivet nut geometry

• Sealing interface

• Manufacturing tolerances

• Installation process

• Temperature cycling

• Environmental testing

For applications targeting IP65, IP66, IP67 or higher enclosure protection, the complete assembly should be validated through appropriate testing rather than relying solely on the rivet nut specification.

This engineering approach helps ensure that the fastening system is evaluated as part of the complete battery enclosure rather than as an isolated component.

Engineering Support for EV Battery Fastening Applications

Juxin Fasteners works with OEMs, engineering companies, distributors, and manufacturers requiring customized fastening solutions for automotive and industrial applications.

For battery pack tray applications, we can support the development of rivet nut configurations based on:

• Aluminum sheet thickness

• Required grip range

• Thread specification

• Sealing structure

• Installation method

• Required torque

• Environmental conditions

• Corrosion requirements

• Production volume

• Assembly process

Custom dimensions, materials, coatings, sealing elements, and packaging can be evaluated according to project requirements.

Applications

Our sealed rivet nuts and blind threaded inserts can be considered for:

• EV battery packs

• Electric vehicle battery trays

• Battery enclosure covers

• High-voltage battery housings

• Battery module assemblies

• Energy storage systems

• Automotive electronics

• Power electronics enclosures

• Thermal management systems

• Aluminum sheet-metal assemblies

• Industrial electrical enclosures

Sealed Rivet Nut Solution for Battery Pack Manufacturing

For EV battery pack manufacturers, the objective is not simply to add a threaded fastener to an aluminum panel. 

The fastening system must work together with the enclosure structure to achieve reliable mechanical performance, serviceability, corrosion resistance, and environmental protection.

Sealed rivet nuts provide a practical blind-installation solution for creating durable threaded fastening points in aluminum battery trays and enclosures, 

particularly where the fastening location must also be considered as part of the overall sealing design.

Juxin Fasteners can provide standard and customized sealed rivet nuts for battery enclosures, EV battery trays, and automotive applications.

Website: www.juxinfasteners.com
Email: info@juxinfasteners.com

Contact Juxin Fasteners for technical specifications, samples, and customized sealed rivet nut solutions for your battery enclosure application.

Packaging Standard

At Juxin Fasteners, we apply standardized export packaging to ensure product protection, traceability, and compliance with international logistics requirements.

1. Standard Export Packaging

Unless otherwise specified, all products will be packed according to our factory standard export packaging, which includes:

Moisture-resistant inner protection

Poly bag or small box packing as required

Reinforced export cartons

Clear labeling with part number, specification, batch number, and quantity

Palletizing for sea or air shipment when necessary

Our standard packaging is designed to ensure safe transportation, efficient warehousing, and long-distance international shipping.

2. Customized Packaging Options

We also provide customized packaging solutions according to customer requirements, including but not limited to:

Private labeling

Customized barcodes

Specific carton dimensions

Retail packaging

Special pallet configuration

Customer-specific marking and identification

So that you know, customized packaging may involve additional costs and extended lead time depending on the complexity of the requirements.

3. Compliance & Quality Assurance

All packaging processes are controlled under our ISO 9001 quality management system to ensure consistency, traceability, and product integrity throughout the supply chain.