Dernière affaire de l'entreprise Shenzhen Hanast New Material co.,LTD les certifications

Background

A manufacturer of AC and DC electric vehicle (EV) charging piles needed to raise the reliability of its outdoor units. Rising field returns caused by moisture ingress and thermal stress pushed the engineering team to look for a better encapsulation material and a dependable supplier.

The company exports across Southeast Asia, where coastal humidity and monsoon conditions put outdoor electronics under constant pressure. Warranty claims were eroding margins and threatening the brand's reputation in a competitive market.

The Challenge

• High humidity and monsoon conditions at coastal installations
• Power modules reaching 120°C+ under fast-charging loads
• Strict IEC and CE expectations for export markets
• Need for fast, repeatable dispensing on a scaling line

The previous material cured too slowly for the target cycle time and became brittle after prolonged thermal cycling, putting solder joints and connectors at risk. The team also needed a supplier who could respond quickly as volumes grew.

The Solution

Working with a potting compound manufacturer, the client adopted a two-part addition-cure silicone potting compound with 1.5 W/m·K thermal conductivity, high dielectric strength, and long-term elasticity. Because the material is addition-cure, it emits no corrosive by-products and cures uniformly even in thick sections.

Implementation

Samples and thermal-cycling tests were completed before mass production. Viscosity and color were tuned to the client's dispenser, and full documentation (TDS, MSDS, RoHS) supported the client's export compliance work. The factory's engineers worked directly with the client's team, shortening the qualification cycle considerably.

Why Silicone Was the Right Choice

Silicone's combination of dielectric strength, thermal conductivity, and long-term elasticity directly addressed the failure modes the client had experienced in the field. Unlike rigid resins, it absorbs thermal expansion without cracking, and unlike some alternatives it releases no corrosive by-products during cure — protecting sensitive electronics sealed inside the charging cabinet.

Results

• Significant reduction in moisture-related field returns
• Stable thermal performance across fast-charging cycles
• Smoother production with consistent cure profiles
• Lower rework and scrap on the encapsulation line
• Reliable export supply with full documentation

Long-Term Outcome

After the switch, the client reported stable performance across multiple production batches and a marked drop in warranty claims. The relationship continued as the client introduced new charger models, with the factory adjusting grades as requirements evolved.

Takeaway

Sourcing directly from a silicone potting supplier that formulates in-house gave the client the flexibility to adapt the material to real production and field conditions — a decisive advantage for outdoor EV charging equipment.