High-integration OBC thermal management: Why is thermal conductive encapsulation adhesive indispensable?

In the field of thermal management for new energy vehicles, OBC (On-Board Charger) is undergoing a new round of technological upgrades. As the demand for fast charging from users continues to rise, OBC is accelerating its evolution towards higher voltages and higher power densities. Integration and miniaturization have become the mainstream trends in the industry.

Why is the reliance of OBC on thermal sealing adhesive increasing nowadays?

In the early days, OBC had simple functions and sufficient internal space, making the design of the heat dissipation solution relatively easy. However, nowadays, the industry generally adopts a multi-in-one integrated architecture, integrating OBC, DC/DC, PDU power distribution units, etc., into a single aluminum shell cavity. The internal space has been significantly compressed, and the arrangement of heat-generating components has become increasingly dense. Traditional thermal pads are difficult to fit into irregular-shaped components such as transformers and inductors, and cannot achieve seamless adhesion on the entire contact surface. The heat dissipation shortcomings have become increasingly prominent.

In this context, the core value of thermal conductive encapsulation adhesive is fully demonstrated. It not only solves the problem of heat dissipation, but also assumes multiple protective responsibilities:
 

Comprehensive coverage, no blind spots for heat dissipation
The liquid thermal conductive encapsulation adhesive can naturally penetrate every tiny gap of the components, fully covering the heat source and conducting the heat to the aluminum housing, completely eliminating heat dissipation blind spots, and suitable for high-power working conditions for continuous and stable heat dissipation.
 

Insulation for three protections, establishing the safety bottom line
In high-voltage scenarios, insulation performance is of utmost importance. After curing, the encapsulation adhesive can form a dense protective layer, possessing excellent insulation, moisture-proof, and smoke-proof capabilities, effectively avoiding the risk of high-voltage breakdown and ensuring the electrical safety of the entire vehicle.
 

Buffer against pressure, eliminate vibration stress
When vehicles encounter bumps or road vibrations, they can easily impact the internal solder joints and delicate components. The custom-formulated thermal conductive encapsulation adhesive features a high-toughness structure, which can highly absorb driving vibrations and external force impacts, buffering structural stress and securely protecting components and solder joints, thereby extending the overall lifespan of the OBC.