Shenzhen Wjm Silicone & Plastic Electronic Co., Ltd.
EN
Shenzhen Wjm Silicone & Plastic Electronic Co., Ltd.
EN

Automotive & EV Solutions

Autoparts and Electric Vehicle Parts Solution

Precision-engineered parts for automotive and electric vehicle sectors, delivering superior performance, safety and cost-efficiency across extreme operating conditions.

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Built for Extreme Environments

Our customized silicone parts combined with precision plastic housings address the strictest demands of modern EV and automotive manufacturing.

  • Temperature resistance: -60°C to +230°C+ extreme thermal cycling
  • IP67/IP68 waterproofing & long-term vibration resistance
  • EMI shielding & UL94 V-0/V-1 flame retardancy
  • 20+ years service life with stable compression set performance
Extreme Environment Components

Advanced LSR Silicone Technology

Liquid Silicone Rubber injection molding – the gold standard for high-volume, high-precision automotive components

Complex Geometries

Superior flow for thin-wall designs down to 0.5mm wall thickness with tight tolerances.

Superior Durability

300-800% elongation, excellent tear strength, ultra-low compression set after aging.

Environmental Resistance

Inherent UV/ozone resistance and dielectric strength for high-voltage isolation.

Custom Formulations

Thermally conductive, EMI shielding, fluorosilicone and low-outgassing grades.

Key EV Application Scenarios

Battery Pack Seals

Module gaskets & enclosure seals, IP68 rated for 5000+ thermal cycles.

Thermal Management

Gap fillers & pads for efficient cell-to-cooling plate heat transfer.

Charging Systems

HV connector seals, EVSE O-rings and potting compounds.

NVH Reduction

Vibration-isolating mounts to reduce noise and harshness.

Product Case Studies

BYD Screen Silicone Protector

BYD Screen Silicone Protector

Custom-fit silicone protector for BYD 2025 Seagull car displays, providing reliable scratch and impact protection.

Li Auto L6 Silicone Parts

Li Auto L6 Silicone Parts

Silicone storage box cover for Li Auto L6 2025 Pro, enhancing item protection during driving and storage.

EV Charging Plastic Parts

EV Charging Plastic Parts

Customized diversified plastic components for new energy vehicle charging systems.

Precision Plastic Housing Solutions

High-volume injection molding for rigid, high-performance enclosures

Materials

  • • Flame-retardant PC/ABS & PC
  • • Glass-filled PA6/PA66 (GF15-45%)
  • • PBT & PPS for high-temperature use
  • • UV-stabilized ASA for exteriors
  • • Conductive compounds for EMI

EV-Specific Uses

  • • Charger station & portable charger housings
  • • BMS & sensor radar housings
  • • Lightweight powertrain components
  • • Dashboard & LED light housings
  • • Power distribution box covers

Design Features

  • • Snap-fits & living hinges
  • • Threaded inserts & integrated clips
  • • Textured soft-touch surfaces
  • • Membrane vents & overmolded gaskets
  • • Laser marking & pad printing

Overmolding & 2K Multi-Shot Integration

LSR bonds directly to plastic or metal in one automated cycle, creating permanent leak-proof assemblies. This eliminates secondary gaskets and adhesives, saving 30-50% on total cost while ensuring seal integrity under shock and vibration.

±0.05mm
Precision Tolerance

Full Turnkey Customization Process

1

Design & Engineering

DFMEA, FEA simulation, CAD design, rapid prototyping in 3-5 days.

2

Tooling

In-house steel molds, hot runner, 2K rotary, aluminum prototype molds.

3

Production

100 pcs to 10M+ pcs/year on automated LSR presses.

4

Secondary Ops

Post-curing, laser marking, assembly, functional testing.

5

Quality Assurance

IATF 16949, ISO 9001, UL/RoHS/REACH, 100% vision inspection.

Our Competitive Advantages

Cost & Speed

Fully automated production delivers fast turnaround and competitive pricing without compromising quality.

Sustainability

Eco-friendly processes, recycled and bio-based material options for green supply chains.

Future-Proof

Continuous R&D keeps us ahead of EV technology trends for long-term partnership.

Integrated silicone + plastic solutions that enhance EV range, reduce warranty claims and accelerate time-to-market. We support OEMs, Tier 1 suppliers and aftermarket partners from concept to mass production.

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