What adhesive is used for sealing three-phase copper busbars?
Analysis of the Application Solution of EP 1721 in High-Reliability Electrical Connection SealingIn new energy vehicles, electric drive systems, industrial motors, and power modules, three-phase copper busbars not only handle high-current transmission tasks but also serve as critical nodes for structural sealing and reliability.Once the seal fails, the ingress of lubricating oil, coolant, or oil vapor can lead to insulation degradation in mild cases, or corrosion, short circuits, and even system failure in severe cases. Therefore, the sealing adhesive for three-phase copper busbars is by no means “just about sticking.”. Three-phase copper busbar sealing ✅ 1. Reliable bonding capability to copper and its coatingsIt exhibits excellent wetting and adhesion on bare copper/brassThe copper busbar with a nickel-plated layer should not delaminate or edge climbLong-term use without interface failure due to oxidation✅ 2. Stable bonding to plastic housingsCompatible with common engineering plastic housingsNo detachment or chipping under thermal expansion and contraction conditions✅ 3. Maintain airtightness after high and low temperature shockThe bonding strength remains stable after thermal cyclingThe airtightness test is passable, with no leakage✅ 4. Excellent chemical resistanceIt can withstand lubricating oil, engine oil, and coolant for extended periodsResistant to oil and gas erosion, not softening or crackingII. Recommended Solution: EP 1721 Conductive Epoxy Encapsulation / Sealing CompoundFor the high-reliability application scenario of three-phase copper busbar sealing, EP 1721 demonstrates exceptional stability in both practical testing and mass production applications. 🔧 Core Advantages of EP 1716Dual bonding capability for both metals and plasticsIt exhibits excellent adhesion to bare copper, copper, and nickel-plated copper busbars while also ensuring bonding with plastic housingsExcellent oil resistanceAfter long-term aging in a 130–150°C hot oil environment:The colloid does not crackThe bonding interface does not develop cracksStructural integrity remains stableMaintains sealing performance after high and low temperature shockAfter passing the thermal shock test, it can still…
